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Page 1
Diversity of Holocene life forms in fossil glacier ice.
Willerslev E, Hansen AJ, Christensen B, Steffensen JP, Arctander P. Willerslev E, et al. Among authors: steffensen jp. Proc Natl Acad Sci U S A. 1999 Jul 6;96(14):8017-21. doi: 10.1073/pnas.96.14.8017. Proc Natl Acad Sci U S A. 1999. PMID: 10393940 Free PMC article.
Ancient biomolecules from deep ice cores reveal a forested southern Greenland.
Willerslev E, Cappellini E, Boomsma W, Nielsen R, Hebsgaard MB, Brand TB, Hofreiter M, Bunce M, Poinar HN, Dahl-Jensen D, Johnsen S, Steffensen JP, Bennike O, Schwenninger JL, Nathan R, Armitage S, de Hoog CJ, Alfimov V, Christl M, Beer J, Muscheler R, Barker J, Sharp M, Penkman KE, Haile J, Taberlet P, Gilbert MT, Casoli A, Campani E, Collins MJ. Willerslev E, et al. Among authors: steffensen jp. Science. 2007 Jul 6;317(5834):111-4. doi: 10.1126/science.1141758. Science. 2007. PMID: 17615355 Free PMC article.
Lead pollution recorded in Greenland ice indicates European emissions tracked plagues, wars, and imperial expansion during antiquity.
McConnell JR, Wilson AI, Stohl A, Arienzo MM, Chellman NJ, Eckhardt S, Thompson EM, Pollard AM, Steffensen JP. McConnell JR, et al. Among authors: steffensen jp. Proc Natl Acad Sci U S A. 2018 May 29;115(22):5726-5731. doi: 10.1073/pnas.1721818115. Epub 2018 May 14. Proc Natl Acad Sci U S A. 2018. PMID: 29760088 Free PMC article.
Pervasive Arctic lead pollution suggests substantial growth in medieval silver production modulated by plague, climate, and conflict.
McConnell JR, Chellman NJ, Wilson AI, Stohl A, Arienzo MM, Eckhardt S, Fritzsche D, Kipfstuhl S, Opel T, Place PF, Steffensen JP. McConnell JR, et al. Among authors: steffensen jp. Proc Natl Acad Sci U S A. 2019 Jul 23;116(30):14910-14915. doi: 10.1073/pnas.1904515116. Epub 2019 Jul 8. Proc Natl Acad Sci U S A. 2019. PMID: 31285330 Free PMC article.
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: steffensen jp. 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.
Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion.
McConnell JR, Burke A, Dunbar NW, Köhler P, Thomas JL, Arienzo MM, Chellman NJ, Maselli OJ, Sigl M, Adkins JF, Baggenstos D, Burkhart JF, Brook EJ, Buizert C, Cole-Dai J, Fudge TJ, Knorr G, Graf HF, Grieman MM, Iverson N, McGwire KC, Mulvaney R, Paris G, Rhodes RH, Saltzman ES, Severinghaus JP, Steffensen JP, Taylor KC, Winckler G. McConnell JR, et al. Among authors: steffensen jp. Proc Natl Acad Sci U S A. 2017 Sep 19;114(38):10035-10040. doi: 10.1073/pnas.1705595114. Epub 2017 Sep 5. Proc Natl Acad Sci U S A. 2017. PMID: 28874529 Free PMC article.
Extreme climate after massive eruption of Alaska's Okmok volcano in 43 BCE and effects on the late Roman Republic and Ptolemaic Kingdom.
McConnell JR, Sigl M, Plunkett G, Burke A, Kim WM, Raible CC, Wilson AI, Manning JG, Ludlow F, Chellman NJ, Innes HM, Yang Z, Larsen JF, Schaefer JR, Kipfstuhl S, Mojtabavi S, Wilhelms F, Opel T, Meyer H, Steffensen JP. McConnell JR, et al. Among authors: steffensen jp. Proc Natl Acad Sci U S A. 2020 Jul 7;117(27):15443-15449. doi: 10.1073/pnas.2002722117. Epub 2020 Jun 22. Proc Natl Acad Sci U S A. 2020. PMID: 32571905 Free PMC article.
Eight glacial cycles from an Antarctic ice core.
Augustin L, Barbante C, Barnes PR, Barnola JM, Bigler M, Castellano E, Cattani O, Chappellaz J, Dahl-Jensen D, Delmonte B, Dreyfus G, Durand G, Falourd S, Fischer H, Flückiger J, Hansson ME, Huybrechts P, Jugie G, Johnsen SJ, Jouzel J, Kaufmann P, Kipfstuhl J, Lambert F, Lipenkov VY, Littot GC, Longinelli A, Lorrain R, Maggi V, Masson-Delmotte V, Miller H, Mulvaney R, Oerlemans J, Oerter H, Orombelli G, Parrenin F, Peel DA, Petit JR, Raynaud D, Ritz C, Ruth U, Schwander J, Siegenthaler U, Souchez R, Stauffer B, Steffensen JP, Stenni B, Stocker TF, Tabacco IE, Udisti R, Van De Wal RS, Van Den Broeke M, Weiss J, Wilhelms F, Winther JG, Wolff EW, Zucchelli M; EPICA community members. Augustin L, et al. Among authors: steffensen jp. Nature. 2004 Jun 10;429(6992):623-8. doi: 10.1038/nature02599. Nature. 2004. PMID: 15190344 Free article.
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