AMS Radiocarbon Lab News about Scott
The role of the oceans in climate change; cycling of heat, fresh water, and carbon by the oceans; dynamics and consequences of abrupt climate change; radiocarbon dating; 14C as a tracer in the carbon cycle
Originally trained in Quaternary and glacial geology, my interests turned to oceanography after noting the profound influence of ocean heat transport on ice sheet growth and retreat in the Arctic. I was amongst the first to show that the timing and speed of changes in the large scale overturning circulation of the oceans matched that predicted by paleo-temperature records from Greenland ice cores and (the then) nascent numerical models of ocean circulation. In the run-up to the 1992 Rio Earth Summit (at which the United Nations Framework Convention on Climate Change was opened for signing) I gave testimony to the U.S. Senate warning that unmitigated warming could lead to changes in the overturning circulation of the northern North Atlantic鈥攁 phenomenon now clearly visible in regional air and sea temperatures 25 years later. For the last two decades my work has focused on studies of the ocean鈥檚 role in determining Ice Age (natural) CO2 variations and on the use of 14C as a tracer in the contemporary carbon cycle and for direct quantification of anthropogenic CO2 emissions.
(CU-NOAA 14C-based Inverse Estimation of US CO2 emissions, EGU 2021)
Education
- PhD: University of Colorado, 1989
- Postdoctoral Scholar: Woods Hole Oceanographic Inst/MIT Joint Program in Oceanography, 1987
Courses taught
- GEOL 5420: Quaternary Dating Methods
- GEOL 5700-011: Super-Problems in Quaternary Climate
- GEOL 5845-900: Independent Study, Geochemistry
Current postdoc
Resources
Select publications
For a full list of Scott's publications, .
2020: Basu, S., Lehman, S. J., Miller, J. B., Andrews, A. E., Sweeney, C., Gurney, K., Xu, X., Southon, J., Tans, P. P. . Proceedings of the National Academy of Sciences, 117(24). doi 10.1073/pnas.1919032117
2016: Basu, S., Miller, J. B., Lehman, S. J. . Atmospheric Chemistry and Physics, 16: 5665-5683. doi 10.5194/acp-16-5665-2016
2012: Miller, J. B., Lehman, S. J., Montzka, S. A., Sweeney, C., Miller, B. R., Karion, A., Wolak, C., Dlugokencky, E. J., Southon, J., Turnbull, J. C., Tans, P. P. . Journal of Geophysical AV名湿鈥擜tmospheres, 117(D8). doi 10.1029/2011JD017048
2007: Marchitto, T. M., Lehman, S. J., Ortiz, J. D., Flueckiger, J., van Geen, A. . Science, 316(5830): 1456-1459. doi 10.1126/science.1138679
2007: Turnbull, J. C., Lehman, S. J., Miller, J. B., Sparks, R. J., Southon, J. R., Tans P. P. . Journal of Geophysical AV名湿鈥擜tmospheres, 112(D11). doi 10.1029/2006JD008184
2004: Hughen, K., Lehman, S., Southon, J., Overpeck, J., Marchal, O., Herring, C., Turnbull, J. . Science, 303(5655) 202-207. doi 10.1126/science.1090300
2000: Hughen, K. A., Southon, J. R., Lehman, S. J., Overpeck, J. T. . Science, 290(5498): 1951-1954. doi 10.1126/science.290.5498.1951
1993: Oppo, D. W., Lehman, S. J. . Science, 259(5098): 1148-1152. doi 10.1126/science.259.5098.1148
1992: Lehman, S. J., Keigwin, L. D. . Nature, 356(6372): 757-762. doi 10.1038/356757a0
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