Sidney Hemming Explained

Sidney Ann Rasbury Hemming
Workplaces:Lamont–Doherty Earth Observatory
Alma Mater:State University of New York at Stony Brook
Thesis Title:Pb isotope studies of sedimentary rocks and detrital components for provenance analysis
Thesis Url:https://www.worldcat.org/de/title/31235173
Thesis Year:1994
Doctoral Advisor:Scott McLennan
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Sidney Hemming is an analytical geochemist known for her work documenting Earth's history through analysis of sediments and sedimentary rocks. She is a professor of earth and environmental sciences at Columbia University.

Education and career

Hemming earned a BS from Midwestern University in 1983 and an MS from Tulane University in 1986.[1] In 1994 she earned her PhD from Stony Brook where she studied lead isotopes in sedimentary rocks.[2] In 1994, Hemming started a postdoc with Wally Broecker at Lamont–Doherty Earth Observatory.[3] As of 2021, Hemming is a professor of earth and environmental sciences at Lamont–Doherty Earth Observatory.

In 2018, Hemming was named a fellow of the American Geophysical Union who cited her "for the development of geochemical and isotopic tracers for sediments to reveal geological processes and events through Earth's history".[4] In 2021, Hemming received a Guggenheim Fellowship which she plans to use to study the time period between the Pliocene and the Pleistocene.

Research

Hemming's research documents changes in Earth's history using the chemical signals in sedimentary rocks and sediments. She uses geochronology to obtain age estimates of events occurring in the ocean thereby tracking changes in water circulation, winds, and glaciers. She has used neodymium isotopes to track rapid changes in Antarctic Intermediate Water[5] and changes in North Atlantic Deep Water.[6] In the southern Ocean, Hemming has used strontium isotopes in sediments to track changes in the strength of the Agulhas current during the Last Glacial Maximum[7] and constrained the location of the Antarctic Circumpolar Current.[8] In California, her research on past climate conditions at Mono Lake[9] [10] revealed chemical signatures in the sediments recorded the Laschamp event, a global geomagnetic shift.[11] [12] [13] In the North Atlantic Ocean, Hemming's research on Heinrich events[14] has constrained the amount of ice-rafted debris moved by icebergs into the North Atlantic Ocean.[15]

Selected publications

Awards and honors

Notes and References

  1. Web site: sidney Lamont–Doherty Earth Observatory. August 14, 2021. www.ldeo.columbia.edu. en.
  2. Pb isotope studies of sedimentary rocks and detrital components for provenance analysis. 1994. English. Sidney Ann Rasbury. Hemming. 31235173.
  3. Web site: John Simon Guggenheim Foundation Sidney R. Hemming. August 15, 2021. en-US.
  4. Web site: Hemming . Honors Program . August 14, 2021.
  5. Pahnke. Katharina. Goldstein. Steven L.. Hemming. Sidney R.. 2008. Abrupt changes in Antarctic Intermediate Water circulation over the past 25,000 years. Nature Geoscience. en. 1. 12. 870–874. 10.1038/ngeo360. 2008NatGe...1..870P. 1752-0894.
  6. Rutberg. Randye L.. Hemming. Sidney R.. Goldstein. Steven L.. 2000. Reduced North Atlantic Deep Water flux to the glacial Southern Ocean inferred from neodymium isotope ratios. Nature. en. 405. 6789. 935–938. 10.1038/35016049. 10879531. 2000Natur.405..935R. 205007120. 1476-4687.
  7. Franzese . Allison M. . Hemming . Sidney R. . Goldstein . Steven L. . Use of strontium isotopes in detrital sediments to constrain the glacial position of the Agulhas Retroflection . Paleoceanography . 2009 . 24 . 2 . n/a . 10.1029/2008PA001706 . 2009PalOc..24.2217F . en . 1944-9186. free .
  8. Hemming. S. R.. Flierdt. T. van de. Goldstein. S. L.. Franzese. A. M.. Roy. M.. Gastineau. G.. Landrot. G.. 2007. Strontium isotope tracing of terrigenous sediment dispersal in the Antarctic Circumpolar Current: Implications for constraining frontal positions. Geochemistry, Geophysics, Geosystems. en. 8. 6. n/a. 10.1029/2006GC001441. 2007GGG.....8.6N13H. 13915405 . 1525-2027. free.
  9. Web site: December 13, 2013. Climate change and the future of Mono Lake. August 15, 2021. phys.org. en.
  10. Colman. S. M.. Hemming. S. R.. Stine. S.. Zimmerman. S. R. H.. 2014. The effects of recent uplift and volcanism on deposition in Mono Lake, California, from seismic-reflection (CHIRP) profiles: MONO LAKE CHIRP. Journal of Geophysical Research: Solid Earth. en. 119. 5. 3955–3970. 10.1002/2013JB010726. free.
  11. Kent. D.V.. Hemming. S.R.. Turrin. B.D.. April 2002. Laschamp Excursion at Mono Lake?. Earth and Planetary Science Letters. en. 197. 3–4. 151–164. 10.1016/S0012-821X(02)00474-0. 2002E&PSL.197..151K. 0012-821X.
  12. Zimmerman. Susan H.. Hemming. Sidney R.. Kent. Dennis V.. Searle. Stephanie Y.. 2006. Revised chronology for late Pleistocene Mono Lake sediments based on paleointensity correlation to the global reference curve. Earth and Planetary Science Letters. en. 252. 1–2. 94–106. 10.1016/j.epsl.2006.09.030. 2006E&PSL.252...94Z. 53422433 .
  13. Cox. Stephen E.. Farley. Kenneth A.. Hemming. Sidney R.. 2012. Insights into the age of the Mono Lake Excursion and magmatic crystal residence time from (U‐Th)/He and 230Th dating of volcanic allanite. Earth and Planetary Science Letters. en. 319–320. 178–184. 10.1016/j.epsl.2011.12.025. 2012E&PSL.319..178C.
  14. Hemming. Sidney R.. 2004. Heinrich events: Massive late Pleistocene detritus layers of the North Atlantic and their global climate imprint. Reviews of Geophysics. en. 42. 1. 10.1029/2003RG000128. 2004RvGeo..42.1005H. 53526029 . 1944-9208. free.
  15. Downing. Greg E.. Hemming. Sidney R.. Jost. Anne. Roy. Martin. September 30, 2013. 40Ar/39Ar hornblende provenance clues about Heinrich event 3 (H3). Geological Society, London, Special Publications. 378. 1. 245–263. 10.1144/sp378.18. 128891292. 0305-8719.
  16. Web site: GSA Fellowship. August 15, 2021. www.geosociety.org.
  17. Web site: About the Geochemistry Fellow Honor. August 15, 2021.
  18. Web site: Sidney Hemming, Paleoclimate Detective, Wins Guggenheim Fellowship . State of the Planet . August 15, 2021 . en . April 13, 2021.

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