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Summer temperature trend over the past two millennia using air content in Himalayan ice
1Laboratoire de Glaciologie et Geophysique de l’Environnement (CNRS-UJF), 54 rue Molière, Domaine Universitaire, BP 96, 38 402 St Martin d’Hères Cedex, France
2IPSL-Laboratoire des Sciences du Climat et de l’Environnement (CEA-CNRS), Bâtiment 701, CE Saclay, Annexe Orme des Merisiers, 91 191 Gif-sur-Yvette, France
3Laboratory of Cryosphere and Environment, Chinese Academy of Sciences, 260 Donggang West Road, 730000 Lanzhou, China
4Naval Ocean-Atmosphere Prediction Laboratory, Department of Oceanography, Naval Postgraduate School, Monterey, CA 93943, USA
5Climate Change Institute (CCI), University of Maine, Orono, ME 04469, USA
6Arctic and Antarctic Research Institute, Beringa Street 38, 199397, St. Petersburg, Russia
Abstract. Two Himalayan ice cores display a factor-two decreasing trend of air content over the past two millennia, in contrast to the relatively stable values in Greenland and Antarctica ice cores over the same period. Because the air content can be related with the relative frequency and intensity of melt phenomena, its variations along the Himalayan ice cores provide an indication of summer temperature trend. Our reconstruction point toward an unprecedented warming trend in the 20th century but does not depict the usual trends associated with "Medieval Warm Period" (MWP), or "Little Ice Age" (LIA).
Discussion Paper (PDF, 1543 KB) Interactive Discussion (Closed, 4 Comments) Final Revised Paper (CP)
Citation: Hou, S., Chappellaz, J., Jouzel, J., Chu, P. C., Masson-Delmotte, V., Qin, D., Raynaud, D., Mayewski, P. A., Lipenkov, V. Y., and Kang, S.: Summer temperature trend over the past two millennia using air content in Himalayan ice, Clim. Past Discuss., 1, 155-168, 2005. Bibtex EndNote Reference Manager
