noaa-recon-15534 Greenland 800 Year Temperature Anomalies Kobashi, T.; Shindell, D.; Kodera, K.; Box, J.E.; Nakaegawa, T.; Kawamura, K. Greenland 800 Year Temperature Anomalies 2013-11-18 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/15534 Investigator T. Kobashi Investigator D. Shindell Investigator K. Kodera Investigator J.E. Box Investigator T. Nakaegawa Investigator K. Kawamura earth science paleoclimate climate reconstructions temperature,multiple proxies,null,standard deviation unit,null,climate reconstructions,normalized|smoothed,null,N,Greenland Temperature Anomaly 51 Year Running Mean using Mann et al. (2009) NH earth science paleoclimate climate reconstructions temperature,multiple proxies,unspecified error lower bound,standard deviation unit,null,climate reconstructions,normalized,null,N,Greenland Temperature Anomaly using Moberg et al. (2005) NH earth science paleoclimate climate reconstructions temperature,multiple proxies,null,standard deviation unit,null,climate reconstructions,normalized,null,N,Greenland Temperature Anomaly Plus using Moberg et al. (2005) NH earth science paleoclimate climate reconstructions temperature,multiple proxies,null,standard deviation unit,null,climate reconstructions,normalized,null,N,Greenland Temperature Anomaly using Mann et al. (2009) NH earth science paleoclimate climate reconstructions temperature,multiple proxies,unspecified error upper bound,standard deviation unit,null,climate reconstructions,normalized,null,N,Greenland Temperature Anomaly using Mann et al. (2009) NH earth science paleoclimate climate reconstructions temperature,multiple proxies,null,standard deviation unit,null,climate reconstructions,normalized,null,N,Greenland Temperature Anomaly using Moberg et al. (2005) NH earth science paleoclimate climate reconstructions temperature,multiple proxies,unspecified error upper bound,standard deviation unit,null,climate reconstructions,normalized,null,N,Greenland Temperature Anomaly using Moberg et al. (2005) NH earth science paleoclimate climate reconstructions temperature,multiple proxies,null,standard deviation unit,null,climate reconstructions,normalized,null,N,Greenland Temperature Anomaly Plus using Mann et al. (2009) NH earth science paleoclimate climate reconstructions age,null,null,year Common Era,null,climate reconstructions,null,null,N,null earth science paleoclimate climate reconstructions temperature,multiple proxies,unspecified error lower bound,standard deviation unit,null,climate reconstructions,normalized,null,N,Greenland Temperature Anomaly using Mann et al. (2009) NH earth science paleoclimate climate reconstructions temperature,multiple proxies,null,standard deviation unit,null,climate reconstructions,normalized|smoothed,null,N,Greenland Temperature Anomaly using Moberg et al. (2005) NH earth science paleoclimate reconstructions air temperature geoscientificInformation Air Temperature Reconstruction Arctic Arctic Oscillation (AO) North Atlantic Oscillation 1200 AD 2010 AD 750 cal yr BP -60 cal yr BP Complete 60 82 -60 -20 Continent North America Greenland Greenland>LATITUDE >LONGITUDE 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 T. Kobashi, D.T. Shindell, K. Kodera, J.E. Box, T. Nakaegawa, and K. Kawamura 2013 Climate of the Past 9 2 583-596 10.5194/cp-9-583-2013

The surface temperature of the Greenland ice sheet is among the most important climate variables for assessing how climate change may impact human societies due to its association with sea level rise. However, the causes of multidecadal-to-centennial temperature changes in Greenland temperatures are not well understood, largely owing to short observational records. To examine these, we calculated the Greenland temperature anomalies (GTA[G-NH]) over the past 800 yr by subtracting the standardized northern hemispheric (NH) temperature from the standardized Greenland temperature. This decomposes the Greenland temperature variation into background climate (NH); polar amplification; and regional variability (GTA[G-NH]). The central Greenland polar amplification factor as expressed by the variance ratio Greenland/NH is 2.6 over the past 161 yr, and 3.3-4.2 over the past 800 yr. The GTA[G-NH] explains 31-35% of the variation of Greenland temperature in the multidecadal-to-centennial time scale over the past 800 yr. We found that the GTA[G-NH] has been influenced by solar-induced changes in atmospheric circulation patterns such as those produced by the North Atlantic Oscillation/Arctic Oscillation (NAO/AO). Climate modeling and proxy temperature records indicate that the anomaly is also likely linked to solar-paced changes in the Atlantic meridional overturning circulation (AMOC) and associated changes in northward oceanic heat transport. STUDY NOTES: Standardized 800 Year Greenland Temperature and Greenland Temperature Plus Anomalies (GTA and GTP). Greenland temperature variation was decomposed into three factors: background climate (NH); polar amplification factor (the ratio of the standard deviations for Greenland and NH temperatures); and regional variability (GTA[G-NH]). For the NH temperature, two proxy-based reconstructions by Moberg et al. (2005) and Mann et al. (2009) were used. For Greenland temperature, we used a recently developed record of the temperature at Summit that was reconstructed from air trapped in the GISP2 ice core (Kobashi et al., 2010). Greenland temperatures are found to deviate from North Hemispheric temperature trend by solar variability, and may relate with the North Atlantic Oscillation Index. We calculated a second principal component of the two time series, "GTP[G-NH]" (Greenland temperature plus = standardized Greenland temperature + standardized NH temperature). GTP[G-NH] can be used to investigate inphase climate signals in the two time series.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kobashi2013a/kobashi2013gta.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11