noaa-icecore-26691 Greenland Ice Cores 500 Year Methanesulfonic Acid Data Osman, M.B.; Das, S.B.; Trusel, L.D.; Evans, M.J.; Fischer, H.; Grieman, M.M.; Kipfstuhl, S.; McConnell, J.R.; Saltzman, E.S. Greenland Ice Cores 500 Year Methanesulfonic Acid Data 2019-05-06 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/26691 Investigator M.B. Osman Investigator S.B. Das Investigator L.D. Trusel Investigator M.J. Evans Investigator H. Fischer Investigator M.M. Grieman Investigator S. Kipfstuhl Investigator J.R. McConnell Investigator E.S. Saltzman earth science paleoclimate ice core chemistry geoscientificInformation 1065 AD 2003 AD 885 cal yr BP -53 cal yr BP Complete 71.4 80 -49.22 -36.4 2147 3040 Continent North America Greenland NGT-B26>LATITUDE 77.25>LONGITUDE -49.22 Continent North America Greenland D4>LATITUDE 71.4>LONGITUDE -43.9 Continent North America Greenland NGT-B21>LATITUDE 80>LONGITUDE -41.14 Continent North America Greenland NGT-B18>LATITUDE 76.62>LONGITUDE -36.4 Continent North America Greenland NGT-B20>LATITUDE 78.83>LONGITUDE -36.5 Continent North America Greenland NGT-B16>LATITUDE 73.94>LONGITUDE -37.63 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Matthew B. Osman, Sarah B. Das, Luke D. Trusel, Matthew J. Evans, Hubertus Fischer, Mackenzie M. Grieman, Sepp Kipfstuhl, Joseph R. McConnell, Eric S. Saltzman 2019 Nature 569 7757 551-555 10.1038/s41586-019-1181-8 https://www.nature.com/articles/s41586-019-1181-8 Joseph R. McConnell, Ross Edwards, Gregory L. Kok, Mark G. Flanner, Charles S. Zender, Eric S. Saltzman, J. Ryan Banta, Daniel R. Pasteris, Megan M. Carter, Jonathan D. W. Kahl 2007 Science 317 5843 1381-1384 10.1126/science.1144856 https://science.sciencemag.org/content/317/5843/1381

Marine phytoplankton have a crucial role in the modulation of marine-based food webs, fishery yields and the global drawdown of atmospheric carbon dioxide. However, owing to sparse measurements before satellite monitoring in the twenty-first century, the long-term response of planktonic stocks to climate forcing is unknown. Here, using a continuous, multi-century record of subarctic Atlantic marine productivity, we show that a marked 10 +/- 7% decline in net primary productivity has occurred across this highly productive ocean basin over the past two centuries. We support this conclusion by the application of a marine-productivity proxy, established using the signal of the planktonic-derived aerosol methanesulfonic acid, which is commonly identified across an array of Greenlandic ice cores. Using contemporaneous satellite-era observations, we demonstrate the use of this signal as a robust and high-resolution proxy for past variations in spatially integrated marine productivity. We show that the initiation of declining subarctic Atlantic productivity broadly coincides with the onset of Arctic surface warming, and that productivity strongly covaries with regional sea-surface temperatures and basin-wide gyre circulation strength over recent decades. Taken together, our results suggest that the decline in industrial-era productivity may be evidence of the predicted collapse of northern Atlantic planktonic stocks in response to a weakened Atlantic Meridional Overturning Circulation. Continued weakening of this Atlantic Meridional Overturning Circulation, as projected for the twenty-first century, may therefore result in further productivity declines across this globally relevant region. STUDY NOTES: Previously-unpublished raw (i.e., unsmoothed, unaveraged) methanesulfonic acid ice core measurements for 6/12 ice core records described in Osman et al. 2019

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b16msa.txt NOAA Template File; Greenland Core NGT-B16 Methanesulfonic Acid Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b20msa.txt NOAA Template File; Greenland Core NGT-B20 Methanesulfonic Acid Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b18msa.txt NOAA Template File; Greenland Core NGT-B18 Methanesulfonic Acid Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b21msa.txt NOAA Template File; Greenland Core NGT-B21 Methanesulfonic Acid Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019d4msa.txt NOAA Template File; Greenland Core D4 Methanesulfonic Acid Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b26msa.txt NOAA Template File; Greenland Core NGT-B26 Methanesulfonic Acid Data USA/NOAA DIF Version 9.8.4 2019-06-17 2019-06-17