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. 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. earth science/paleoclimate/ice core (NGT-B26>LATITUDE 77.25>LONGITUDE -49.22) (D4>LATITUDE 71.4>LONGITUDE -43.9) (NGT-B21>LATITUDE 80>LONGITUDE -41.14) (NGT-B18>LATITUDE 76.62>LONGITUDE -36.4) (NGT-B20>LATITUDE 78.83>LONGITUDE -36.5) (NGT-B16>LATITUDE 73.94>LONGITUDE -37.63) 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 STUDY NOTES: Previously-unpublished raw (i.e., unsmoothed, unaveraged) methanesulfonic acid ice core measurements for 6/12 ice core records described in Osman et al. 2019 NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Osman, M.B. Investigator : Das, S.B. Investigator : Trusel, L.D. Investigator : Evans, M.J. Investigator : Fischer, H. Investigator : Grieman, M.M. Investigator : Kipfstuhl, S. Investigator : McConnell, J.R. Investigator : Saltzman, E.S. 2019-05-06 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/26691 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b16msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b20msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b18msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b21msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019d4msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b26msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b16msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b20msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b18msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b21msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019d4msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b26msa.txt English https://www.ncdc.noaa.gov/paleo/study/26691 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b16msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b20msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b18msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b21msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019d4msa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/osman2019/osman2019ngt-b26msa.txt Matthew B. Osman, Sarah B. Das, Luke D. Trusel, Matthew J. Evans, Hubertus Fischer, Mackenzie M. Grieman, Sepp Kipfstuhl, Joseph R. McConnell, Eric S. Saltzman2019Industrial-era decline in subarctic Atlantic productivityNature5697757551-55510.1038/s41586-019-1181-8https://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. Kahl200720th-Century Industrial Black Carbon Emissions Altered Arctic Climate ForcingScience31758431381-138410.1126/science.1144856 https://science.sciencemag.org/content/317/5843/1381 START YEAR: 1065 AD * END YEAR: 2003 AD -49.22 71.4 -36.4 80