R. Lawrence Edwards

from Wikipedia, the free encyclopedia

Richard Lawrence Edwards , called Larry, (born March 14, 1953 in Boston ) is an American geologist and geochemist.

Edwards graduated from the Massachusetts Institute of Technology with a bachelor's degree in 1976 and a master's degree from the University of Michigan in 1986. He received his PhD in geochemistry from Caltech in 1988 . From 1988 he was Assistant Professor and from 1990 Professor at the University of Minnesota . Today he is Distinguished McKnight Professor of Geology and Geophysics there.

He is known for the advancement of uranium-thorium dating and dealt with palaeoceanography and paleoclimatology. His research contributed to the calibration of the radiocarbon method. He examined cave deposits and compared their dating with those of ice cores and ocean sediments in order to reconstruct abrupt climatic changes in the last ice age. He also used his reconstruction of the paleoclimate in archeology, for example, he detected dry spells for the ends of the Tang Dynasty , Yuan Dynasty and Ming Dynasty in China from cave deposits. Conversely, according to his research, periods of rain in the early northern Song Dynasty contributed to population and economic growth (especially rice cultivation) during this period. His study of cave sediments also provided some of the most accurate clues about human-made climate change in recent centuries. He was one of the most cited geoscientists (Thompson Reuters Highly Cited Researchers 2014).

In 2011 he was awarded the Arthur L. Day Prize , highlighting his use of uranium thorium and stable isotope methods for dating abrupt climate changes over the past 500,000 years. He is a member of the American Association for the Advancement of Science , the National Academy of Sciences (2011), and the American Academy of Arts and Sciences . In 2008 he became a Fellow of the American Geophysical Union and in 2009 he was a Guggenheim Fellow .

Fonts

  • with Cheng, H., Shen, CC, Polyak, VJ, Asmerom, Y., Woodhead, J., Hellstrom, J., Wang, YJ, Kong, XG, Spotl, C., Wang, XF, Alexander, EC: Improvements in Th-230 dating, Th-230 and U-234 half-life values, and U-Th isotopic measurements by multi-collector inductively coupled plasma mass spectrometry . Earth planet. Sci. Lett., Volume 371, 2013, pp. 82-91.
  • with Cheng, H., Zhang, PZ, Spotl, C., Cai, YJ, Zhang, DZ, Song, W., Tan, M., An., ZS: The climatic cyclicity in semiarid-arid Central Asia over the past 500,000 years . Geophys. Res. Lett., Volume 39, 2012, L01705
  • with Denton, GH, Anderson, RF, Toggweilor, JR, Schaeffer, JM, Putnam, AE: The last glacial termination . Science, Volume 328, 2010, pp. 1652-1656
  • miot Cai, YJ, Cheng, H., An, ZS, Edwards, RL, Wang, XF, Tan, LC, Wang, J.: Large variations of oxygen isotopes in precipitation over south-central Tibet during Marine Isotope Stage 5 . Geology, Vol. 38, 2010, pp. 243-246.
  • with H. Cheng, WS Broecker, GH, Denton, XG Kong, YJ Wang, R. Zhang, XF Wang, XY Jiang: Ice Age Terminations . Science, Volume 326, 2009, pp. 248-252.
  • with PZ Zhang, H. Cheng, H., FH Chen, YJ Wang, XL Yang, J. Liu, M. Tan, XF Wang, JH Liu, CL An, ZB Dai, J. Zhou, DZ Zhang, JH Jia, L. Jin, KR Johnson: A high resolution test of sun, climate, culture relationships from a 1810-year Chinese cave record , Science, Volume 322, 2008, pp. 940-942.
  • with Wang, YJ, Cheng, H., Kong, XG, Shao, XH, Chen, ST, Wu, JY, Jiang, XY, Wang, XF & An, ZS: Millennial- and orbital-scale changes in the East Asian monsoon over the past 224,000 years . Nature, Volume 451, 2008, pp. 1090-1093; doi : 10.1038 / nature06692
  • with Wang, YJ, Cheng, H., He, YQ, Kong, XG, An, ZS, Wu, JY, Kelly, MG, Dykoski, CA: The Holocene Asian Monsoon: links to solar changes and North Atlantic climate . Science, Vol. 308, 2005, pp. 854-857.
  • mt Wang, X.-F., Auler, AS, Cheng, H., Cristalli, P., Smart, P., Richards, D .: Wet periods in NE Brazil over the past 210 kyr linked to distant climate anomalies . Nature, Vol. 432, 2004, pp. 740-744.
  • with Yuan, DX, Cheng, H., Dykoski, C., Kelly, MJ, Zhang, ML, Qing, JM, Lin, YS, Wang, YG, Dorale, JA, An, ZS, Cai, YJ: Timing, duration , and transitions of the Last Interglacial Asian Monsoon . Science, Volume 304, 2004, pp. 575-578.
  • with Cobb, KM, Charles, CD, Cheng, H .: El Nino-Southern Oscillation and tropical Pacific climate during the last millennium . Nature, Volume 424, 2003, pp. 271-276.
  • with Wang, YG, Cheng, H., An, ZS, Wu, JY, Shen, C.-C., Dorale, JA: A high-resolution absolute-dated late Pleistocene monsoon record from Hulu Cave, China . Science, Vol. 294, 2001, pp. 2345-2348.
  • with JH Chen, GJ Wasserburg: U-238, U-234, Th-230, Th-232 systematics and the precise measurement of time over the past 500,000 years , Earth Planet. Sci. Lett., Vol. 81, 1987, pp. 175-192

Web links

Individual evidence

  1. ↑ Life and career data according to Pamela Kalte u. a. American Men and Women of Science , Thomson Gale 2004
personal data
SURNAME Edwards, R. Lawrence
ALTERNATIVE NAMES Edwards, Larry
BRIEF DESCRIPTION American geologist and geochemist
DATE OF BIRTH March 14, 1953
PLACE OF BIRTH Boston