Global and Hemispheric 400 Year Glacier Length Temperature Reconstructions Leclercq, P.W.; Oerlemans, J.H. Leclercq, P.W. Oerlemans, J.H. Air Temperature Reconstruction temperature earth science/paleoclimate/climate reconstructions|historical|other collections (age,null,null,year Common Era,null,climate reconstructions|historical|other collections,null,null,N,null) earth science/paleoclimate/climate reconstructions|historical|other collections (surface temperature,null,95% confidence interval margin of error,degree Celsius,annual,climate reconstructions|historical|other collections,anomalized,null,N,based on glacier length; 1961-1990 reference period) earth science/paleoclimate/climate reconstructions|historical|other collections (surface temperature,null,null,degree Celsius,annual,climate reconstructions|historical|other collections,anomalized,null,N,based on glacier length; 1961-1990 reference period) earth science/paleoclimate/reconstructions (Global>LATITUDE >LONGITUDE ) (Southern Hemisphere>LATITUDE >LONGITUDE ) (Northern Hemisphere>LATITUDE >LONGITUDE ) Temperature reconstructions for recent centuries provide a historical context for the warming over the twentieth century. We reconstruct annual averaged surface temperatures of the past 400 years on hemispherical and global scale from glacier length fluctuations. We use the glacier length records of 308 glaciers. The reconstruction is a temperature proxy with decadal resolution that is completely independent of other temperature records. Temperatures are derived from glacier length changes using a linear response equation and an analytical glacier model that is calibrated on numerical model results. The global and hemispherical temperatures reconstructed from glacier length fluctuations are in good agreement with the instrumental record of the last century. Furthermore our results agree with existing multi-proxy reconstructions of temperature in the pre-instrumental period. The temperature record obtained from glacier fluctuations confirms the pronounced warming of the twentieth century, giving a global cumulative warming of 0.94 ± 0.31 K over the period 1830-2000 and a cumulative warming of 0.84 ± 0.35 K over the period 1600-2000. STUDY NOTES: Global, Northern hemisphere, and Southern hemisphere temperature reconstructions for period 1600 to 2000, based on world-wide glacier length changes. Data are the reconstructed temperature anomaly w.r.t. the 1961-1990 average temperature, plus the uncertainty at 95% confidence interval. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Leclercq, P.W. Investigator : Oerlemans, J.H. 2012-11-30 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/13544 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leclercq2012/leclercq2012nh.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leclercq2012/leclercq2012global.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leclercq2012/leclercq2012sh.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leclercq2012/leclercq2012nh.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leclercq2012/leclercq2012global.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leclercq2012/leclercq2012sh.txt English https://www.ncdc.noaa.gov/paleo/study/13544 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leclercq2012/leclercq2012nh.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leclercq2012/leclercq2012global.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leclercq2012/leclercq2012sh.txt Paul Willem Leclercq and Johannes Oerlemans. 2012. Global and hemispheric temperature reconstruction from glacier length fluctuations. Climate Dynamics, Vol. 38, Issue 5-6, pp. 1065-1079. DOI: 10.1007/s00382-011-1145-7 START YEAR: 1600 AD * END YEAR: 2000 AD -180 -90 180 90