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Influence of Regional Precipitation Patterns on Stable Isotopes in Ice Cores from the Central Himalayas : Volume 8, Issue 1 (25/02/2014)

By Pang, H.

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Book Id: WPLBN0003976247
Format Type: PDF Article :
File Size: Pages 13
Reproduction Date: 2015

Title: Influence of Regional Precipitation Patterns on Stable Isotopes in Ice Cores from the Central Himalayas : Volume 8, Issue 1 (25/02/2014)  
Author: Pang, H.
Volume: Vol. 8, Issue 1
Language: English
Subject: Science, Cryosphere
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Hou, S., Mayewski, P. A., Kaspari, S., & Pang, H. (2014). Influence of Regional Precipitation Patterns on Stable Isotopes in Ice Cores from the Central Himalayas : Volume 8, Issue 1 (25/02/2014). Retrieved from http://ebook.worldlibrary.net/


Description
Description: Key Laboratory of Coast and Island development of Ministry of Education, School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China. Several ice cores have been recovered from the Dasuopu (DSP) Glacier and the East Rongbuk (ER) Glacier in the central Himalayas since the 1990s. Although the distance between the DSP and the ER ice core drilling sites is only ~ 125 km, the stable isotopic record (δ18O or δD) of the DSP core is interpreted in previous studies as a temperature proxy, while the ER core is interpreted as a precipitation proxy. Thus, the climatological significance of the stable isotopic records of these Himalayan ice cores remains a subject of debate. Based on analysis of regional precipitation patterns over the region, we find that remarkable discrepancy in precipitation seasonality between the two sites may account for their disparate isotopic interpretations. At the ER core site, the Indian summer monsoon (ISM) precipitation is dominating due to topographic blocking of the moisture from westerlies by the high ridges of Mt. Qomolangma (Everest), which results in a negative correlation between the ER Δ18O or δD record and precipitation amount along the southern slope of the central Himalayas in response to the amount effect. At the DSP core site, in comparison with the ISM precipitation, the wintertime precipitation associated with the westerlies is likely more important owing to its local favorable topographic conditions for interacting with the western disturbances. Therefore, the DSP stable isotopic record may be primarily controlled by the westerlies. Our results have important implications for interpreting the stable isotopic ice core records recovered from different climatological regimes of the Himalayas.

Summary
Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas

Excerpt
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, 3, 89–95, doi:10.5194/cp-3-89-2007, 2007.; Hu, Z. Z. and Wu, Z.: The intensification and shift of the annual North Atlantic Oscillation in a global warming scenario simulation, Tellus A, 56, 112–124, 2004.; Hu, Z. Z., Latif, M., Roeckner, E., and Bengtsson, L.: Intensified Asian summer monsoon and its variability in a coupled model forced by increasing greenhouse gas concentrations, Geophys. Res. Lett., 27, 2681–2684, 2000.; Hurrell, J. W.: Influence of variations in extratropical wintertime teleconnections on Norther Hemisphere temperature, Geophys. Res. Lett., 23, 665–668, 1996.; Jones, P. D., Parker, D. E., Osborn, T. J., and Briffa, K. R.: Global and hemispheric temperature anomalies-land and marine instrumental records, in: Trends: A Compendium of Data on Global Change. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tenn., USA. doi:10.3334/CDIAC/cli.002, 2013.; Joswiak, D. R., Yao, T., Wu, G., Tian, L., and Xu, B.: Ice-core evidence of westerly and monsoon moisture contributions in the central Tibetan Plateau, J. Glaciol., 59, 56–66, doi:10.3189/2013JoG12J035, 2013.; Karan, P. P.: Geographic regions of the Himalayas, Bulletin of Tibetology, 3, 5–25, 1966.; Kaspari, S., Mayewski, P. A., Kang, S., Sneed, S., Hou, S., Hooke, R., Kreutz, K., Introne, D., Handley, M., Maasch, K., Qin, D., and Ren, J.: Reduction in northward incursions of the South Asian monsoon since 1400 AD inferred from a Mt. Everest ice core, Geophy. Res. Lett., 34, L16701, doi:10.1029/2007GL030440, 2007.; Kaspari, S., Hooke, R., Mayewski, P. A., Kang, S., Hou, S., and Qin, D.: Snow accumulation rate on Mt. Everest: synchroneity with sites across the Tibetan Plateau on 50-100 year timescales, J. Glaciol., 54, 343–352, 2008.; Kaspari, S., Mayewski, P. A., Handley, M., Kang, S., Hou, S., Sneed, S., Maasch, K., and Qin, D.: A High-Resolution Record of Atmospheric Dust Composition and Variability Since 1650 AD from a Mt. Everest Ice Core, J. Climate, 22, 3910–3925, doi:10.1175/2009JCLI2518.1, 2009a.; Kaspari, S., Mayewski, P. A., Handley, M., Kang, S., Sneed, S., Hou, S., and Qin, D.: Recent Increases in Atmospheric Concentrations of Bi, U, Cs, S and Ca from a 350-Year Mt. Everest Ice Core Record, J. Geophys. Res., 114, D04302, doi:10.1029/2008JD011088, 2009b.; Kaspari, S., Schwikowski, M., Gysel, M., Flanner, M. G., Kang, S., Hou, S., and Mayewski, P. A.: Recent increase in black carbon concentrations from a Mt. Everest ice core spanning 1860–2000 AD, Geophy. Res. Lett., 38, L04703, doi:10.1029/2010GL046096, 2011.; Kistler, R., Kalnay, E., Collins, W., Saha, S., White, G., Woollen, J., Chelliah, M., Ebisuzaki, W., Kanamitsu, M., Kousky, V., van den Dool, H., Jenne, R., and Fiorino, M.: The NCEP-NCAR 50-year reanalysis: monthly means CD-ROM and documentation, B. Am. Meteorol. Soc., 82, 247–268, 2001.; Lang, T. J. and Barros, A. P.: Winter storms in the central Himalayas, J. Meteorol. Soc. Jpn., 82, 829–844, 2004.; Lin, Z. and Wu, X.: A preliminary analysis about the tracks of moisture transport on the Qinghai-Xizang Plateau, Geogr. Res., 9, 33–40, 1990 (in Chinese).; Liu, G.: Hydrometeorological characteristics of the Tibet Plateau, IAHS Publ. No. 179, Atmospheric Deposition (Proceedings of the Baltimore Symposium, May 1989)

 

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