noaa-icecore-18695 WAIS Divide Ice Core 67.2-9.8 kaBP Continuous CH4 Data Rhodes, R.H.; Brook, E.J.; Chiang, J.C.H.; Blunier, T.; Maselli, O.J.; McConnell, J.R.; Romanini, D.; Severinghaus, J. WAIS Divide Ice Core 67.2-9.8 kaBP Continuous CH4 Data 2015-05-29 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/18695 Investigator R.H. Rhodes Investigator E.J. Brook Investigator J.C.H. Chiang Investigator T. Blunier Investigator O.J. Maselli Investigator J.R. McConnell Investigator D. Romanini Investigator J. Severinghaus earth science paleoclimate ice cores depth,null,null,meter,null,ice cores,null,null,N,null earth science paleoclimate ice cores age,null,null,calendar kiloyear before present,null,ice cores,null,null,N,null earth science paleoclimate climate forcing|ice cores methane,bulk atmosphere,null,parts per billion,null,climate forcing|ice cores,smoothed,null,N,reported on the NOAA2004 scale earth science paleoclimate ice cores age,null,null,calendar year before present,null,ice cores,null,null,N,null earth science paleoclimate ice core atmospheric gas geoscientificInformation 67200 cal yr BP 9800 cal yr BP Complete -79.4676 -79.4676 -112.0865 -112.0865 1806 1806 Continent Antarctica WAIS Divide WDC06A>LATITUDE -79.4676>LONGITUDE -112.0865 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 Rachael H. Rhodes, Edward J. Brook, John C.H. Chiang, Thomas Blunier, Olivia J. Maselli, Joseph R. McConnell, Daniele Romanini, Jeffrey P. Severinghaus 2015 Science 348 6238 1016-1019 10.1126/science.1262005 http://www.sciencemag.org/content/348/6238/1016.abstract

The causal mechanisms responsible for the abrupt climate changes of the Last Glacial Period remain unclear. One major difficulty is dating ice-rafted debris deposits associated with Heinrich events: Extensive iceberg influxes into the North Atlantic Ocean linked to global impacts on climate and biogeochemistry. In a new ice core record of atmospheric methane with ultrahigh temporal resolution, we find abrupt methane increases within Heinrich stadials 1, 2, 4, and 5 that, uniquely, have no counterparts in Greenland temperature proxies. Using a heuristic model of tropical rainfall distribution, we propose that Hudson Strait Heinrich events caused rainfall intensification over Southern Hemisphere land areas, thereby producing excess methane in tropical wetlands. Our findings suggest that the climatic impacts of Heinrich events persisted for 740 to 1520 years. STUDY NOTES: Ultra-high temporal resolution methane concentration data from West Antarctic Ice Sheet (WAIS) Divide (WD) ice core obtained by online, continuous technique.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/wais2015ch4.txt Data File; WAIS 67.2-9.8 kaBP Continuous CH4 Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11