Adriatic Sea Explained

Adriatic Sea
Location:Southern Europe
Type:Sea
Etymology:From the ancient city of Adria
Inflow:Adige, Buna, Drin, Krka, Neretva, Po, Soča
Outflow:Ionian Sea
Catchment:235000km2
Basin Countries:Bordering: Italy, Albania, Croatia, Montenegro, Slovenia, and Bosnia and Herzegovina
Not bordering: Greece, Serbia, North Macedonia, Kosovo, Austria, Switzerland and France (drainage basins for inflow rivers)[1]
Length:800km (500miles)
Width:200km (100miles)
Area:138600km2
Depth:252.5m (828.4feet)
Max-Depth:1233m (4,045feet)
Volume:35000km3
Residence Time:3.4±0.4 years
Salinity:38–39 PSU
Shore:3739.1km (2,323.4miles)
Temperature High:28C
Temperature Low:9C
Islands:Over 1300

The Adriatic Sea is a body of water separating the Italian Peninsula from the Balkan Peninsula. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto (where it connects to the Ionian Sea) to the northwest and the Po Valley. The countries with coasts on the Adriatic are Albania, Bosnia and Herzegovina, Croatia, Italy, Montenegro, and Slovenia.

The Adriatic contains more than 1,300 islands, mostly located along the Croatian part of its eastern coast. It is divided into three basins, the northern being the shallowest and the southern being the deepest, with a maximum depth of . The Otranto Sill, an underwater ridge, is located at the border between the Adriatic and Ionian Seas. The prevailing currents flow counterclockwise from the Strait of Otranto, along the eastern coast and back to the strait along the western (Italian) coast. Tidal movements in the Adriatic are slight, although larger amplitudes are known to occur occasionally. The Adriatic's salinity is lower than the Mediterranean's because the Adriatic collects a third of the fresh water flowing into the Mediterranean, acting as a dilution basin. The surface water temperatures generally range from 30C in summer to 12C in winter, significantly moderating the Adriatic Basin's climate.

The Adriatic Sea sits on the Apulian or Adriatic Microplate, which separated from the African Plate in the Mesozoic era. The plate's movement contributed to the formation of the surrounding mountain chains and Apennine tectonic uplift after its collision with the Eurasian plate. In the Late Oligocene, the Italian Peninsula first formed, separating the Adriatic Basin from the rest of the Mediterranean. All types of sediment are found in the Adriatic, with the bulk of the material transported by the Po and other rivers on the western coast. The western coast is alluvial or terraced, while the eastern coast is highly indented with pronounced karstification. There are dozens of marine protected areas in the Adriatic, designed to protect the sea's karst habitats and biodiversity. The sea is abundant in flora and fauna—more than 7,000 species are identified as native to the Adriatic, many of them endemic, rare and threatened ones.

The Adriatic's shores are populated by more than 3.5 million people; the largest cities are Bari, Venice, Trieste and Split. The earliest settlements on the Adriatic shores were Etruscan, Illyrian, and Greek. By the 2nd century BC, the region was under Rome's control. In the Middle Ages, the Adriatic shores and the sea itself were controlled, to a varying extent, by a series of states—most notably the Byzantine Empire, the Croatian Kingdom, the Republic of Venice, the Habsburg monarchy and the Ottoman Empire. The Napoleonic Wars resulted in the First French Empire gaining coastal control and the British effort to counter the French in the area, ultimately securing most of the eastern Adriatic shore and the Po Valley for Austria. Following Italian unification, the Kingdom of Italy started an eastward expansion that lasted until the 20th century. Following World War I and the collapse of Austria-Hungary and the Ottoman Empire, the entire eastern coast's control passed to Yugoslavia and Albania, except for Trieste and surrounding area which remained under Italian control. The former disintegrated during the 1990s, resulting in four new states on the Adriatic coast. Italy and Yugoslavia agreed on their maritime boundaries by 1975 and this boundary is recognised by Yugoslavia's successor states, but the maritime boundaries between Slovenia, Croatia, Bosnia and Herzegovina, and Montenegro are still disputed. Italy and Albania agreed on their maritime boundary in 1992.

Fisheries and tourism are significant sources of income all along the Adriatic coast. Adriatic Croatia's tourism industry has grown faster economically than the rest of the Adriatic Basin's. Maritime transport is also a significant branch of the area's economy—there are 19 seaports in the Adriatic that each handle more than a million tonnes of cargo per year. The largest Adriatic seaport by annual cargo turnover is the Port of Trieste, while the Port of Split is the largest Adriatic seaport by passengers served per year.

Name

The origins of the name Adriatic are linked to the Illyrian settlement of Adria, which probably derives its name from Illyrian adur 'water, sea'. In classical antiquity, the sea was known as Mare Adriaticum (Mare Hadriaticum, also sometimes simplified to Adria) or, less frequently, as Mare Superum '[the] upper sea'.[2] The two terms were not synonymous, however. Mare Adriaticum generally corresponds to the Adriatic Sea's extent, spanning from the Gulf of Venice to the Strait of Otranto. That boundary became more consistently defined by Roman authorsearly Greek sources place the boundary between the Adriatic and Ionian seas at various places ranging from adjacent to the Gulf of Venice to the southern tip of the Peloponnese, eastern shores of Sicily and western shores of Crete. Mare Superum on the other hand normally encompassed both the modern Adriatic Sea and the sea off the Apennine peninsula's southern coast, as far as the Strait of Sicily. Another name used in the period was Mare Dalmaticum, applied to waters off the coast of Dalmatia or Illyricum. During the early modern period, the entire sea was also known as the Gulf of Venice (Italian: golfo di Venezia),[3] although that name is now informally applied only to the northern area of the sea, from Maestra Point in the Po Delta to Cape Kamenjak on the Istrian Peninsula.

The names for the sea in the languages of the surrounding countries include Albanian: Deti Adriatik; Mèr Adriatic; Friulian: Mâr Adriatic; Αδριατική θάλασσα|Adriatikí thálassa; Marea Adriatică; Italian: Mare Adriatico; Jadransko more, Јадранско море; Slovenian: Jadransko morje; Mar Adriàtico. In Serbo-Croatian and Slovene, the sea is often referred to as simply Jadran.

Geography

The Adriatic Sea is a semi-enclosed sea, bordered in the southwest by the Apennine or Italian Peninsula, in the northwest by the Italian regions of Veneto and Friuli-Venezia Giulia, and in the northeast by Slovenia, Croatia, Bosnia and Herzegovina, Montenegro, and Albania—the Balkan peninsula. In the southeast, the Adriatic Sea connects to the Ionian Sea at the 72km (45miles) wide Strait of Otranto. The International Hydrographic Organization (IHO) defines the boundary between the Adriatic and the Ionian seas as a line running from the Butrinto River's mouth (latitude 39°44'N) in Albania to the Karagol Cape in Corfu, through this island to the Kephali Cape (these two capes are in latitude 39°45'N), and on to the Santa Maria di Leuca Cape (latitude 39°48'N).[4] It extends from the northwest to the southeast and is wide. It covers and has a volume of . The Adriatic extends northwest from 40° to 45°47' north, representing the Mediterranean's northernmost portion. The sea is geographically divided into the Northern Adriatic, Central (or Middle) Adriatic, and Southern Adriatic.

The Adriatic Sea drainage basin encompasses, yielding a land–sea ratio of 1.8. The drainage basin's mean elevation is above sea level, with a mean slope of 12.1°.[5] Major rivers discharging into the Adriatic include the Po, Soča, Krka, Neretva, Drin, Buna, and Vjosë.[6] In the late 19th century, Austria-Hungary established a geodetic network with an elevation benchmark using the average Adriatic Sea level at the Sartorio pier in Trieste, Italy. The benchmark was subsequently retained by Austria, adopted by Yugoslavia, and retained by the states that emerged after its dissolution.[7] In 2016, Slovenia adopted a new elevation benchmark referring to the upgraded tide gauge station in the coastal town of Koper.[8]

The Alps, which also have a large meteorological impact on the Mediterranean, touch the Adriatic in the area around Trieste towards Duino and Barcola.[9]

Length in kilometres of Adriatic coastlines[10]
CountryMainlandIslandsTotalCoastal fronta
1,777.3 4,058 5,835.3 526
1,249 23b 1,272 926
396 10 406 265
249 11 260 92
46.6 0 46.6 17
21.2 0 21.2 10.5
Total3,739.14,1027,841.11,836.5
Notes: a The distance between the extreme points of each state's coastline, b Not including islands in coastal lagoons[11]
---->The Adriatic Sea ecosystem is threatened by excessive input of nutrients through drainage from agricultural land and wastewater flowing from cities; this includes both along its coast and from rivers draining into the sea—especially from the Po River. Venice is often cited as an example of polluted coastal waters where shipping, transportation, farming, manufacturing and wastewater disposal contribute to polluting the sea.[12] A further risk is presented by ballast water discharge by ships, especially tankers. Still, since most of the cargo handled by the Adriatic ports, and virtually all liquid (tanker) cargo handled by the ports, is coming to—not coming from—the Adriatic Basin, the risk from ballast water (from tankers expelling ballast water then loading in the Adriatic) remains minimal. However, proposed export oil pipelines were objected to specifically because of this issue. Oil spills are a major concern in terms of potential environmental impact and damage to tourism and fisheries.[13] It is estimated that if a major oil spill happened, a million people would lose their livelihoods in Croatia alone.[14] An additional risk is presented by oil refineries in the Po River basin where oil spills have occurred before,[15] in addition to accidents occurring in the Adriatic already, so far with no significant environmental consequences.[16] Since 2006, Italy has been considering the construction of an offshore and an onshore LNG terminal in the Gulf of Trieste, as well as a pipeline, in the immediate vicinity of the Slovenian–Italian border. The Slovenian government and municipalities,[17] the municipal council of Trieste,[18] and non-governmental organisations have voiced concern over their environmental hazards, effect on transport and effect on tourism.[19] [20]

Another source of pollution of the Adriatic is solid waste. Drifting waste—occasionally relatively large quantities of material, especially waste plastic—is transported northwest by the sirocco.[21] Air pollution in the Adriatic Basin is associated with the large industrial centres in the Po River valley and the large industrial cities along the coast.[22] [23]

Italy and Yugoslavia established a joint commission to protect the Adriatic Sea from pollution in 1977; the organization later changed with Slovenia, Croatia and Montenegro replacing Yugoslavia.[24] Future pollution hazards are addressed and pollution hotspots are assessed not only by nations in the basin but also through regional projects with World Bank support. 27 such hotspots have been determined as of 2011, 6 warranting an urgent response.[25]

History

Settlements along the Adriatic dating to between 6100 and 5900 BC appear in Albania and Dalmatia on the eastern coast, related to the Cardium pottery culture. During classical antiquity, Illyrians inhabited the eastern Adriatic coast, and the western coast was inhabited by the peoples of Ancient Italy, mainly Etruscans, before the Roman Republic's rise. Greek colonisation of the Adriatic dates back to the 7th and 6th centuries BC when Epidamnos and Apollonia were founded. The Greeks soon expanded further north establishing several cities, including Ancona, Black Corcyra, Epidaurus, Issa, with trade established as far north as the Po River delta, where the emporion (trading station) of Adria was founded.

Roman era

Roman economic and military influence in the region began to grow with the creation by 246 BC of a major naval base at Brundisium (now Brindisi), which was established to bar Carthaginian ships from the Adriatic during the Punic Wars. This led to conflict with the Illyrians, who lived in a collection of semi-Hellenized kingdoms that covered much of the Balkans and controlled the eastern shore of the sea, resulting in the Illyrian Wars from 229 to 168 BC. The initial Roman intervention in 229 BC, motivated in part by a desire to suppress Illyrian piracy in the Adriatic, marked the first time that the Roman navy crossed that sea to launch a military campaign.[26] Those wars ended with the eastern shore becoming a province of the Roman Republic. However, resistance to Roman rule continued sporadically and Rome did not completely consolidate control of the region until Augustus's general Tiberius put down the Great Illyrian Revolt, a bitter struggle waged from 6 to 9 AD.[27] Following the repression of the revolt the Roman province of Illyricum was split into Dalmatia and Pannonia. Most of the eastern shore of the Adriatic was part of Dalmatia, except for the southernmost portion, part of the province of Macedonia, and the peninsula of Istria on the northern part of the eastern shore; Istria contained the important Roman colony at Pula and was incorporated into the province of Italy.

During the Roman period, Brundisium, on the western shore, and Apollonia and Dyrrachium (originally called Epidamnos, now Durrës in Albania) on the eastern shore became important ports. Brundisium was linked by the Via Appia road to the city of Rome, and Dyrrachium and Apollonia were both on the Via Egnatia, a road that by about 130 BC the Romans had extended eastward across the Balkans to Byzantium (later Constantinople, now Istanbul).[28] [29] This made the sea passage across the Adriatic between Brundisium and Dyrrachium (or Apollonia) a link in the primary route for travelers, trade, and troop movements, between Rome and the East. This route played a major role in some of the military operations that marked the end of the Roman Republic and the start of the imperial period. Sulla used it during the First Mithridatic War.[30] During Caesar's Civil War, there was a three-month delay in Caesar's Balkan campaign against Pompey caused when winter storms on the Adriatic and a naval blockade held up Mark Antony from reaching him from Brundisium with reinforcements; after the reinforcements finally arrived Caesar made an unsuccessful attempt to capture Dyrrachium before the campaign moved inland. Marc Antony and Octavian (later Augustus) crossed the Adriatic to Dyrrachium with their armies in their campaign against two of Caesar's assassins, Brutus and Cassius, that culminated in the Battle of Philippi. Brundisium and Dyrrachium remained important ports well after the Roman period, but an earthquake in the 3rd century AD changed the path of a river causing Apollonia's harbor to silt up, and the city to decline.[31]

Another city on the Italian coast of the Adriatic that increased in importance during the Roman era was Ravenna. During the reign of Augustus, it became a major naval base as part of his program to re-organize the Roman navy to better protect commerce in the Mediterranean. During the 4th century AD the emperors of the Western Roman Empire had moved their official residence north from Rome to Mediolanum (now Milan) in order to be better able to control the military frontier with the Germanic tribes. In 402 AD, during a period of repeated Germanic invasions of Italy, the capital was shifted to Ravenna because nearby marshes made it more defensible, and the Adriatic provided an easy escape path by sea. When the Western Empire fell in 476 AD Ravenna became the capital of the Ostrogothic Kingdom of Italy.

Middle Ages

In the Early Middle Ages, after the Roman Empire's decline, the Adriatic's coasts were ruled by Ostrogoths, Lombards and the Byzantine Empire. The Ostrogothic Kingdom ruled Italy following the fall of the Western Roman Empire in 476 AD. However, during the reign of Justinian the Byzantine Empire sent an army under the general Belisarius to regain control of Italy, resulting in the Gothic War (535–554). The Byzantines established the Exarchate of Ravenna and by 553 AD their viceroy (Exarch) ruled almost the entire Italian peninsula from that city. In 568 AD the Lombards invaded northern Italy, and over the course of the next century or so the importance of the Exarchate declined as the territory under Lombard control expanded and as the Byzantine outpost of Venice became increasingly independent. In 752 AD the Lombards overthrew the Exarchate, ending the influence of the Byzantine Empire on the western shore of the Adriatic for a few centuries.[32]

The last part of the period saw the rise of the Carolingian Empire and then the Frankish Kingdom of Italy, which controlled the Adriatic Sea's western coast, while Byzantine Dalmatia on the east coast gradually shrunk into Dalmatian city-states following the Avar and Croatian invasions starting in the 7th century. The Republic of Venice, one of the maritime republics, was founded during this period and went on to become a significant maritime power after receiving a Byzantine tax exemption in 1082. The end of the period brought about the Holy Roman Empire's control over the Kingdom of Italy (which would last until the Peace of Westphalia in 1648), the establishment of an independent Kingdom of Croatia and the Byzantine Empire's return to the southern Apennine peninsula.[33] In addition, the Papal States were carved out in the area around Rome and central Italy in the 8th century.

The High Middle Ages in the Adriatic Sea basin saw further territorial changes, including the Norman conquest of southern Italy ending the Byzantine presence on the Apennine peninsula in the 11th and 12th centuries (the territory would become the Kingdom of Naples in 1282) and the control of a substantial part of the eastern Adriatic coast by the Kingdom of Hungary after a personal union was established between Croatia and Hungary in 1102.[34] In this period, the Republic of Venice began to expand its territory and influence. In 1202, the Fourth Crusade was diverted to conquer Zadar at the behest of the Venetians—the first instance of a Crusader force attacking a Catholic city—before proceeding to sack Constantinople. In the 13th century, Venice established itself as a leading maritime nation. During much of the 12th and 13th centuries, Venice and the Republic of Genoa were engaged in warfare culminating in the War of Chioggia, ousting the Genoese from the Adriatic. Still, the 1381 Treaty of Turin that ended the war required Venice to renounce claims to Dalmatia, after losing the territory to Hungary in 1358. In the same year, the Republic of Ragusa was established in Dubrovnik as a city-state after it was freed from Venetian suzerainty.

Venice regained Dalmatia in 1409 and held it for nearly four hundred years, with the republic's apex of trading and military power in the first half of the 15th century. The 15th and the 16th centuries brought about the Byzantine Empire's destruction in 1453 and the Ottoman Empire's expansion that reached Adriatic shores in present-day Albania and Montenegro as well as the immediate hinterland of the Dalmatian coast, defeating the Hungarian and Croatian armies at Krbava in 1493 and Mohács in 1526. These defeats spelled the end of an independent Hungarian kingdom, and both Croatian and Hungarian nobility chose Ferdinand I of the House of Habsburg as their new ruler, bringing the Habsburg monarchy to the shore of the Adriatic Sea, where it would remain for nearly four hundred years.[35] The Ottomans and Venetians fought a series of wars, but until the 17th century these were not fought in the Adriatic area. Ottoman raids on the Adriatic coasts effectively ceased after the massive setback in the Battle of Lepanto in October 1571.

Early modern period

The 17th century's final territorial changes were caused by the Morean or Sixth Ottoman–Venetian War, when in 1699 Venice slightly enlarged its possessions in Dalmatia. In 1797, the Republic of Venice was abolished after the French conquest. The Venetian territory was then handed over to Austria and briefly ruled as part of the Archduchy of Austria. The territory was turned back over to France after the Peace of Pressburg in 1805 when the territory in the Po valley became an integral part of the new Napoleonic Kingdom of Italy. The new kingdom included the province of Romagna, thus removing the Papal State from the Adriatic coast; however, Trieste, Istria and Dalmatia were joined into a set of separate provinces of the French Empire: the Illyrian Provinces. These were created in 1809 through the Treaty of Schönbrunn; they represented the end of Venetian rule on the eastern Adriatic coast, as well as the end of the Republic of Ragusa. The Adriatic Sea was a minor theatre in the Napoleonic Wars; the Adriatic campaign of 1807–1814 involved the British Royal Navy contesting the Adriatic's control by the combined navies of France, Italy and the Kingdom of Naples. During the campaign, the Royal Navy occupied Vis and established its base there in Port St. George. The campaign reached its climax in the 1811 Battle of Lissa, and ended with British and Austrian troops seizing the coastal cities on the eastern Adriatic coast from the French. Days before the Battle of Waterloo, the Congress of Vienna awarded the Illyrian Provinces (spanning from the Gulf of Trieste to the Bay of Kotor) to Austria. The Congress of Vienna also created the Kingdom of Lombardy–Venetia which encompassed the city of Venice, the surrounding coast and a substantial hinterland, and was controlled by Austria. In the Apennine peninsula's south, the Kingdom of the Two Sicilies was formed in 1816 by unifying the kingdoms of Naples and Sicily.

Modern period

The process of Italian unification culminated in the Second Italian War of Independence, resulting in the Kingdom of Sardinia annexing all territories along the western Adriatic coast south of Venetia in 1860, and the 1861 establishment of the Kingdom of Italy in its place. The Kingdom of Italy expanded in 1866: it annexed Venetia, but its navy was defeated in the Adriatic near Vis. Following the Austro-Hungarian Compromise of 1867 and the Croatian–Hungarian Settlement of 1868, the control of much of the eastern Adriatic coast was redefined. The cisleithanian (Austrian) part of Austria-Hungary spanned from the Austrian Littoral to the Bay of Kotor, with the exception of the Croatian Littoral mainland. In the territory outside the Austrian Littoral, special status was given to Fiume (modern-day Rijeka) as a separate part of the Kingdom of Hungary. The rest of the territory was made a part of the Kingdom of Croatia-Slavonia, which in turn was also in the Transleithanian part of the dual monarchy. The Adriatic coastline controlled by the Ottoman Empire was reduced by the Congress of Berlin in 1878, through recognition of the independence of the Principality of Montenegro, which controlled the coast south of the Bay of Kotor to the Bojana River. The Ottoman Empire lost all territories along the Adriatic following the First Balkan War and consequent 1913 Treaty of London that established an independent Albania.

The World War I Adriatic Campaign was largely limited to blockade attempts by the Allies and the effort of the Central Powers to thwart the British, French and Italian moves. Italy joined the Allies in April 1915 with the Treaty of London, which promised Italy the Austrian Littoral, northern Dalmatia, the port of Vlorë, most of the eastern Adriatic islands and Albania as a protectorate. The treaty provided the basis for all the following divisions between Italy and Yugoslavia. In 1918, the Montenegrin national assembly voted to unite with the Kingdom of Serbia, giving the latter access to the Adriatic. Another short-lived, unrecognised state established in 1918 was the State of Slovenes, Croats and Serbs, formed from parts of Austria-Hungary, comprising most of the former monarchy's Adriatic coastline. Later that year, the Kingdom of Serbia and the State of Slovenes, Croats and Serbs formed the Kingdom of Serbs, Croats and Slovenes—subsequently renamed Yugoslavia. The proponents of the new union in the Croatian parliament saw the move as a safeguard against Italian expansionism as stipulated in the Treaty of London. The treaty was largely disregarded by Britain and France because of conflicting promises made to Serbia and a perceived lack of Italian contribution to the war effort outside Italy itself. The 1919 Treaty of Saint-Germain-en-Laye did transfer the Austrian Littoral and Istria to Italy but awarded Dalmatia to Yugoslavia. Following the war, a private force of demobilized Italian soldiers seized Rijeka and set up the Italian Regency of Carnaro—seen as a harbinger of Fascism—in order to force the recognition of Italian claims to the city. After sixteen months of the Regency's existence, the 1920 Treaty of Rapallo redefined the Italian–Yugoslav borders, among other things transferring Zadar and the islands of Cres, Lastovo and Palagruža to Italy, securing the island of Krk for Yugoslavia and establishing the Free State of Fiume; this new state was abolished in 1924 by the Treaty of Rome that awarded Fiume (modern Rijeka) to Italy and Sušak to Yugoslavia.

Late 20th century

During World War II, the Adriatic saw only limited naval action, starting with the Italian invasion of Albania and the joint Axis invasion of Yugoslavia. The latter led to the annexation of a large part of Dalmatia and nearly all the eastern Adriatic islands by Italy and the establishment of two puppet states, the Independent State of Croatia and the Kingdom of Montenegro, which controlled the remainder of the former Yugoslav Adriatic coast. In 1947, after the Armistice between Italy and Allied armed forces and the war's end, Italy (now a republic) and the Allies signed the Treaty of Peace with Italy. The treaty reversed all wartime annexations, guaranteed the independence of Albania, created the Free Territory of Trieste (FTT) as a city-state, and gave communist Yugoslavia most of the Slovenian Littoral, as well as Istria, the islands of Cres, Lastovo and Palagruža, and the cities of Zadar and Rijeka. The FTT was partitioned in 1954: Trieste itself and the area to the North of it were placed under Italian control, while the rest came under Yugoslav control. This arrangement was made permanent in the 1975 Treaty of Osimo.

During the Cold War, the Adriatic Sea became the southernmost flank of the Iron Curtain as Italy joined NATO,[36] while the Warsaw Pact established bases in Albania. After the fall of communism, Yugoslavia broke apart: Slovenia and Croatia declared independence in 1991,[37] and Bosnia–Herzegovina followed in 1992,[38] while Montenegro remained in a federation with Serbia, officially called Serbia and Montenegro.[39] The ensuing Croatian War of Independence included limited naval engagements and a blockade of Croatia's coast by the Yugoslav Navy, leading to the Battle of the Dalmatian channels and a later withdrawal of Yugoslav vessels.[40] Montenegro declared itself independent in 2006, effectively land-locking Serbia. The period also saw the Adriatic Sea as the theatre of several NATO operations, including the blockade of Yugoslavia, intervention in Bosnia and Herzegovina and the 1999 bombing of Yugoslavia.[41] [42]

Boundaries

Italy and Yugoslavia defined their Adriatic continental shelf delimitation in 1968, with an additional agreement signed in 1975 on the Gulf of Trieste boundary, following the Treaty of Osimo. The boundary agreed in 1968 extends 353nmi and consists of 43 points connected by straight lines or circular arc segments. The additional boundary agreed upon in 1975 consists of 5 points, extending from an end point of the 1968 line. All successor states of former Yugoslavia accepted the agreements. In the Adriatic's southernmost areas the border was not determined in order to avoid prejudicing the location of the tripoint with the Albanian continental shelf border, which remains undefined. Before the breakup of Yugoslavia, Albania, Italy and Yugoslavia initially proclaimed 15nmi territorial waters, subsequently reduced to international-standard 12nmi and all sides adopted baseline systems (mostly in the 1970s). Albania and Italy determined their sea border in 1992 according to the equidistance principle.[43] Following Croatian EU membership, the Adriatic became an internal sea of the EU.[44] The United Nations Convention on the Law of the Sea defines the Adriatic Sea as an enclosed or semi-enclosed sea.

Adriatic Euroregion

The Adriatic Euroregion was established in Pula in 2006 to promote trans-regional and trans-national cooperation in the Adriatic Sea area and serve as an Adriatic framework to help resolve issues of regional importance. The Adriatic Euroregion consists of 23 members: the Apulia, Molise, Abruzzo, the Marches, Emilia-Romagna, Veneto and Friuli-Venezia Giulia regions of Italy; the municipality of Izola in Slovenia; the Istria, Primorje-Gorski Kotar, Lika-Senj, Zadar, Šibenik-Knin, Split-Dalmatia and Dubrovnik-Neretva counties of Croatia; the Herzegovina-Neretva Canton of Bosnia–Herzegovina; the municipalities of Kotor and Tivat in Montenegro; the Fier, Vlorë, Tirana, Shkodër, Durrës and Lezhë counties of Albania; and the Greek prefectures of Thesprotia and Corfu.[45]

Disputes

The former Yugoslav republics' land borders were decided by demarcation commissions implementing the AVNOJ decisions of 1943 and 1945,[46] [47] but the exact course has not been agreed upon by the successor states, which makes the maritime boundaries' definition difficult; the maritime borders were not defined at all in the time of Yugoslavia. In addition, the maritime boundary between Albania and Montenegro was not defined before the 1990s.

Croatia and Slovenia started negotiations to define maritime borders in the Gulf of Piran in 1992 but failed to agree, resulting in a dispute. Both countries also declared their economic zones, which partially overlap.[48] Croatia's application to become an EU member state was initially suspended pending resolution of its border disputes with Slovenia. These disputes with Slovenia were eventually settled with an agreement to accept the decision of an international arbitration commission set up via the UN, enabling Croatia to progress towards EU membership.[49] [50] [51] Croatia is still not following the resolution of the international arbitration for the Gulf of Piran. A dispute over the gulf is still on going with the Croatians handing out fines to Slovenian fishermen that are following the agreed economic.[52] Aside from the EU membership difficulty, even before its settling the dispute has caused no major practical problems.

The maritime boundary between Bosnia–Herzegovina and Croatia was formally settled in 1999, but a few issues are still in dispute—the Klek peninsula and two islets in the border area. The Croatia–Montenegro maritime boundary is disputed in the Bay of Kotor, at the Prevlaka peninsula. This dispute was exacerbated by the peninsula's occupation by the Yugoslav People's Army and later by the (Serbian–Montenegrin) FR Yugoslav Army, which in turn was replaced by a United Nations observer mission that lasted until 2002. Croatia took over the area with an agreement that allowed Montenegrin presence in the bay's Croatian waters, and the dispute has become far less contentious since Montenegro's independence in 2006.

Economy

Fishing

The Adriatic Sea fishery's production is distributed among countries in the basin.[53] In 2000, the nominal—on a live weight basis—total landings of all Adriatic fisheries reached 110000t.[54] Overfishing is a recognised problem—450 species of fish live in the Adriatic Sea, including 120 species threatened by excessive commercial fishing, a problem exacerbated by pollution and global warming. Overexploited species include common dentex, red scorpionfish, monkfish, John Dory, blue shark, spiny dogfish,[55] mullet, red mullet, Norway lobster, as well as European hake,[56] and sardines.[57] Turtles and common bottlenose dolphins are also being killed by fishing nets. The depleted fish stock, and Croatia's Ecological and Fisheries Protection Zone (ZERP) contributed to accusations of overfishing exchanged between Italian and Croatian fishermen. ZERP was introduced in 2003, but its application to EU member states was suspended in 2004. The depleted stocks of fish are being addressed through a new proposed EU fisheries policy that was scheduled to take effect in 2013, when Croatia acceded to the EU,[58] and restore the stocks to sustainable levels by 2015.[59]

The largest volume of fish harvesting was in Italy, where the total production volume in 2007 stood at 465637t. In 2003, 28.8% of Italian fisheries production volume was generated in the Northern and central Adriatic, and 24.5% in Apulia (from the Southern Adriatic and Ionian Sea). Italian fisheries, including those operating outside the Adriatic, employed 60,700 in the primary sector, including aquaculture (which comprises 40% of the total fisheries production). The total fisheries output's gross value in 2002 was $1.9 billion.[60]

In 2007, Croatia's production in live weight reached 53083t. In 2006, the total Croatian fisheries production volume was 37800t of catch and 14200t from marine aquaculture. Croatian fisheries employed approximately 20,000. The 2006 marine capture catch in Croatian waters consisted of sardines (44.8%), anchovies (31.3%), tunas (2.7%), other pelagic fish (4.8%), hake (2.4%), mullet (2.1%), other demersal fish (8.3%), crustaceans (largely lobster and Nephrops norvegicus) (0.8%), shellfish (largely oysters and mussels) (0.3%), cuttlefish (0.6%), squids (0.2%) and octopuses and other cephalopods (1.6%). Croatian marine aquaculture production consisted of tuna (47.2%), oysters and mussels (28.2% combined) and bass and bream (24.6% combined).[61]

In 2007, Albanian fisheries production amounted to 7505t, including aquaculture production, which reached 1970t in 2006. At the same time, Slovenian fisheries produced a total of 2500t with 55% of the production volume originating in aquaculture, representing the highest ratio in the Adriatic. Finally, the Montenegrin fisheries production stood at 911t in 2006, with only 11 tonnes coming from aquaculture.[62] In 2007, the fisheries production in Bosnia–Herzegovina reached volume of 9625and in Slovenia.

Tourism

The countries bordering the Adriatic Sea are significant tourist destinations. The largest number of tourist overnight stays and the most numerous tourist accommodation facilities are recorded in Italy, especially in the Veneto region (around Venice). Veneto is followed by the Emilia-Romagna region and by the Adriatic Croatian counties. The Croatian tourist facilities are further augmented by 21,000 nautical ports and moorings; nautical tourists are attracted to various types of marine protected areas.

All countries along the Adriatic coast, except Albania and Bosnia–Herzegovina, take part in the Blue Flag beach certification programme (of the Foundation for Environmental Education), for beaches and marinas meeting strict quality standards including environmental protection, water quality, safety and services criteria.[63] As of January 2012, the Blue Flag has been awarded to 103 Italian Adriatic beaches and 29 marinas, 116 Croatian beaches and 19 marinas, 7 Slovenian beaches and 2 marinas, and 16 Montenegrin beaches.[64] Adriatic tourism is a significant source of income for these countries, especially in Croatia and Montenegro where the tourism income generated along the Adriatic coast represents the bulk of such income.[65] [66] The direct contribution of travel and tourism to Croatia's GDP stood at 5.1% in 2011, with the total industry contribution estimated at 12.8% of the national GDP.[67] For Montenegro, the direct contribution of tourism to the national GDP is 8.1%, with the total contribution to the economy at 17.2% of Montenegrin GDP.[68] Tourism in Adriatic Croatia has recently exhibited greater growth than in the other regions around the Adriatic.[69]

Rimini is a major seaside tourist resort in Italy.File:Triestebarcolana.jpgThe Barcolana regatta in Trieste, Italy, was named "the greatest sailing race" by the Guinness World Record for its 2,689 boats and over 16,000 sailors on the starting line.[70] File:Ulcinj, Montenegro - Sept. 2010.jpgView of Ulcinj, MontenegroFile:Golden Cape.jpgThe Zlatni Rat (Golden Cape) on the island of BračFile:Split center from the air 1.jpgThe Palace of the Emperor Diocletian in SplitFile:Neum, costa.jpgThe coast of Neum, the only town to be situated along Bosnia and Herzegovina's 20km (10miles) of coastlineFile:Palace Hotel Portoroz.JPGPortorož is the largest seaside tourist centre in Slovenia.
Tourism in the Adriatic Sea area[71] [72] [73] [74] [75] [76] [77] [78]
CountryRegionCAF beds*Hotel bedsOvernight Stays
2,302,899
Neum municipality 6,000 1,810 280,000
1,028,793 119,042 67,231,198
152,847 40,921 8,656,077
692,987 209,700 60,820,308
Emilia-Romagna 440,999 298,332 37,477,880
the Marches193,965 66,921 10,728,507
Abruzzo 108,747 50,987 33,716,112
Molise 11,711 6,383 7,306,951
Apulia238,972 90,618 12,982,987
40,427 25,916 7,964,893
Seaside municipalities 24,080 9,330 1,981,141

Transport

See also: Ship transport. There are nineteen Adriatic Sea ports (in four different countries) that each handles more than a million tonnes of cargo per year. The largest cargo ports among them are the Port of Trieste (the largest Adriatic cargo port in Italy), the Port of Venice, the Port of Ravenna, the Port of Koper (the largest Slovenian port),[79] the Port of Rijeka (the largest Croatian cargo port), and the Port of Brindisi. The largest passenger ports in the Adriatic are the Port of Split (the largest Croatian passenger port) and ports in Ancona (the largest Italian passenger seaport in the Adriatic).[80] The largest seaport in Montenegro is the Port of Bar.[81] In 2010, the Northern Adriatic seaports of Trieste, Venice, Ravenna, Koper and Rijeka founded the North Adriatic Ports Association to position themselves more favourably in the EU's transport systems.[82] [83]

The port of Trieste is of particular importance for Central Europe because this is where the Transalpine Pipeline begins, supplying 100 percent of southern Germany, 90 percent of Austria and 50 percent of the Czech Republic with crude oil.[84]

Major Adriatic ports*, annual transport volume
PortCountry, Region/CountyCargo (tonnes)Passengers
AnconaItaly, the Marches10,573,0001,483,000
BariItaly, Apulia3,197,0001,392,000
BarlettaItaly, Apulia1,390,000
BrindisiItaly, Apulia10,708,000469,000
ChioggiaItaly, Veneto2,990,000
DurrësAlbania, Durrës3,441,000770,000
KoperSlovenia, Slovenian Istria18,000,000100,300
ManfredoniaItaly, Apulia1,277,000
MonfalconeItaly, Friuli-Venezia Giulia4,544,000
OrtonaItaly, Abruzzo1,340,000
PločeCroatia, Dubrovnik-Neretva5,104,000146,000
Porto NogaroItaly, Friuli-Venezia Giulia1,475,000
RabacCroatia, Istria1,090,000669,000
RavennaItaly, Emilia-Romagna27,008,000
RijekaCroatia, Primorje-Gorski Kotar15,441,000219,800
SplitCroatia, Split-Dalmatia2,745,0003,979,000
TriesteItaly, Friuli-Venezia Giulia39,833,000
VeniceItaly, Veneto32,042,0001,097,000

Oil and gas

Natural gas is produced through several projects, including a joint venture of the Eni and INA companies that operates two platforms—one is in Croatian waters and draws gas from six wells, and the other (which started operating in 2010) is located in Italian waters. The Adriatic gas fields were discovered in the 1970s,[92] but their development commenced in 1996. In 2008, INA produced 14.58 million BOE per day of gas.[93] About 100 offshore platforms are located in the Emilia-Romagna region,[94] along with 17 in the Northern Adriatic.[95] Eni estimated its concessions in the Adriatic Sea to hold at least 40000000000m2 of natural gas, adding that they may even reach 100000000000m2. INA estimates, however, are 50% lower than those supplied by Eni.[96] Oil was discovered in the Northern Adriatic at a depth of approximately ; the discovery was assessed as not viable because of its location, depth and quality.[97] These gas and oil reserves are part of the Po basin Province of Northern Italy and the Northern Mediterranean Sea.[98]

In the 2000s, investigation works aimed at discovering gas and oil reserves in the Middle and Southern Adriatic basins intensified, and by the decade's end, oil and natural gas reserves were discovered southeast of the Bari, Brindisi—Rovesti and Giove oil discoveries. Surveys indicate reserves of 3 billion barrels of oil in place and 2000000000000cuft of gas in place.[99] The discovery was followed by further surveys off the Croatian coast.[100] In January 2012, INA commenced prospecting for oil off Dubrovnik, marking the resumption of oil exploration along the eastern Adriatic coast after surveys commenced in the late 1980s around the island of Brač were cancelled because of Yugoslavia's breakup and war in Croatia. Montenegro is also expected to look for oil off its coast.[101] As of January 2012, only 200 exploration wells had been sunk off the Croatian coast, with all but 30 in the Northern Adriatic basin.[102]

Gallery

Port of Durrës, the largest port in AlbaniaFile:Luka brajdica 040408.jpgPort of Rijeka, the largest cargo port in CroatiaFile:Koper (39).jpgPort of Koper, the largest port in SloveniaFile:Triest Port1.JPGPort of Trieste, the largest cargo port in the AdriaticFile:The port of Bar, view from Vrsuta mnt (39372956332).jpgPort of Bar, the largest seaport in MontenegroFile:Porto_ancona.jpgPort of Ancona, a large passenger port

See also

References

Bibliography

Further reading

  • 1986 . Darko . Kovačić . Kitovi Jadranskog mora . 281–283 . Priroda: popularni časopis hrvatskog prirodoslovnog društva . 0351-0662 . 74 . 9–10 . Whales of the Adriatic Sea.

External links

Notes and References

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