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A multimillion-year-old record of Greenland vegetation and glacial history preserved in sediment beneath 1.4 km of ice at Camp Century.
Christ AJ, Bierman PR, Schaefer JM, Dahl-Jensen D, Steffensen JP, Corbett LB, Peteet DM, Thomas EK, Steig EJ, Rittenour TM, Tison JL, Blard PH, Perdrial N, Dethier DP, Lini A, Hidy AJ, Caffee MW, Southon J. Christ AJ, et al. Among authors: southon j. Proc Natl Acad Sci U S A. 2021 Mar 30;118(13):e2021442118. doi: 10.1073/pnas.2021442118. Proc Natl Acad Sci U S A. 2021. PMID: 33723012 Free PMC article.
Accelerator mass spectrometry in biomedical dosimetry: relationship between low-level exposure and covalent binding of heterocyclic amine carcinogens to DNA.
Turteltaub KW, Felton JS, Gledhill BL, Vogel JS, Southon JR, Caffee MW, Finkel RC, Nelson DE, Proctor ID, Davis JC. Turteltaub KW, et al. Among authors: southon jr. Proc Natl Acad Sci U S A. 1990 Jul;87(14):5288-92. doi: 10.1073/pnas.87.14.5288. Proc Natl Acad Sci U S A. 1990. PMID: 2371271 Free PMC article.
Multiradionuclide evidence for an extreme solar proton event around 2,610 B.P. (∼660 BC).
O'Hare P, Mekhaldi F, Adolphi F, Raisbeck G, Aldahan A, Anderberg E, Beer J, Christl M, Fahrni S, Synal HA, Park J, Possnert G, Southon J, Bard E; ASTER Team; Muscheler R. O'Hare P, et al. Among authors: southon j. Proc Natl Acad Sci U S A. 2019 Mar 26;116(13):5961-5966. doi: 10.1073/pnas.1815725116. Epub 2019 Mar 11. Proc Natl Acad Sci U S A. 2019. PMID: 30858311 Free PMC article.
American mastodon extirpation in the Arctic and Subarctic predates human colonization and terminal Pleistocene climate change.
Zazula GD, MacPhee RD, Metcalfe JZ, Reyes AV, Brock F, Druckenmiller PS, Groves P, Harington CR, Hodgins GW, Kunz ML, Longstaffe FJ, Mann DH, McDonald HG, Nalawade-Chavan S, Southon JR. Zazula GD, et al. Among authors: southon jr. Proc Natl Acad Sci U S A. 2014 Dec 30;111(52):18460-5. doi: 10.1073/pnas.1416072111. Epub 2014 Dec 1. Proc Natl Acad Sci U S A. 2014. PMID: 25453065 Free PMC article.
Widespread collapse of the Ross Ice Shelf during the late Holocene.
Yokoyama Y, Anderson JB, Yamane M, Simkins LM, Miyairi Y, Yamazaki T, Koizumi M, Suga H, Kusahara K, Prothro L, Hasumi H, Southon JR, Ohkouchi N. Yokoyama Y, et al. Proc Natl Acad Sci U S A. 2016 Mar 1;113(9):2354-9. doi: 10.1073/pnas.1516908113. Epub 2016 Feb 16. Proc Natl Acad Sci U S A. 2016. PMID: 26884201 Free PMC article.
Bison phylogeography constrains dispersal and viability of the Ice Free Corridor in western Canada.
Heintzman PD, Froese D, Ives JW, Soares AE, Zazula GD, Letts B, Andrews TD, Driver JC, Hall E, Hare PG, Jass CN, MacKay G, Southon JR, Stiller M, Woywitka R, Suchard MA, Shapiro B. Heintzman PD, et al. Proc Natl Acad Sci U S A. 2016 Jul 19;113(29):8057-63. doi: 10.1073/pnas.1601077113. Epub 2016 Jun 6. Proc Natl Acad Sci U S A. 2016. PMID: 27274051 Free PMC article.
Estimating US fossil fuel CO2 emissions from measurements of 14C in atmospheric CO2.
Basu S, Lehman SJ, Miller JB, Andrews AE, Sweeney C, Gurney KR, Xu X, Southon J, Tans PP. Basu S, et al. Among authors: southon j. Proc Natl Acad Sci U S A. 2020 Jun 16;117(24):13300-13307. doi: 10.1073/pnas.1919032117. Epub 2020 Jun 1. Proc Natl Acad Sci U S A. 2020. PMID: 32482875 Free PMC article.
71 results