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[1]LIU Yangmin,ZHANG Mingjun,WANG Shengjie,et al.Interannual Variation of Stable Hydrogen and Oxygen Isotopes in Precipitation in Arid Northwest China Based on GCMs[J].Research of Soil and Water Conservation,2016,23(01):260-267,277.

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Interannual Variation of Stable Hydrogen and Oxygen Isotopes in Precipitation in Arid Northwest China Based on GCMs

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 01 Page number: 260-267,277 Column: Public date: 2016-02-28

Title:: Interannual Variation of Stable Hydrogen and Oxygen Isotopes in Precipitation in Arid Northwest China Based on GCMs

Author(s):: LIU Yangmin, ZHANG Mingjun, WANG Shengjie, QIANG Fang, CHE Yanjun; College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China

Keywords:: stable hydrogen and oxygen isotopes in precipitation; regression analysis; GNIP; GCM; interannual variation

CLC:: P426.61⁺2

DOI:: -

Abstract:: The stable water isotopes in precipitation (¹⁸O and D) are the tracers for climate, which is a crucial part in hydrology. According to simulation of the variation of stable water isotope in precipitation in different temporal scales, general circulation model (GCM) has been an effective way to study global and regional water circulation. Based on GNIP (Isotopic data from the Global Network of isotopes in precipitation), and isotope-equipped GCM from SWING2 (Stable Water Isotope Intercomparison Group，Phase2), the interannual variation of observed and simulated results in arid Northwest Asia during the period from 1986 to 2003 was analyzed by using regression analysis and isotope-equipped GCM. According to temperature effect of isotopes in precipitation, the slopes of weighted average annual δ¹⁸O_w from GNIP are in Urumqi，Zhangye and Hotan from GNIP are 0.041, 0.207, 0.915‰/a, respectively. The slopes of weighted average annual δD_w from GNIP are 0.767, 0.026, 0.120‰/a, respectively. In warm season (from May to September), the slopes of weighted average annual δ¹⁸O_w from GNIP are in Urumqi，Zhangye and Hotan from GNIP are -0.008, 0.085, 0.306‰/a, respectively. The slopes of weighted average annual δD_w from GNIP are -0.331, -1.390, -1.503‰/a, respectively. The slopes of results in δ¹⁸O_w and δD_w values from GISS-E (MERRA), GISS-E (NCEP), isoGSM (NCEP), LMDZ (free), LMDZ (ECMWF) and MIROC (free) are different from the results of regression analysis. Considered the local meteoric water line (LMWL) from regression analysis and isotope-equipped GCM, the slope of meteoric water line of Hotan was greater than those of Zhangye and Urumqi.

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