|
|
|
| Variation of Stable Isotopes and Moisture Sources in Precipitation at the Dunhuang Basin in Northwest China |
| Guo Xiaoyan1,2, Feng Qi1, Li Zongxing1, Guo Rui1, Jia Bing1 |
1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
|
|
|
|
Abstract In this study, event-based precipitation samples collected from October 2012 to October 2013 in the Dunhuang Basin in Northwest China, GNIP data and HYSPLIT model have been used to constrain the stable isotopes variations and moisture sources. The δD, δ18O and d-excess showed distinctively seasonal variations: with more positive δD, δ18O and lower d-excess values in summer and more negative δD, δ18O and higher d-excess values in winter. The relationship between local air temperature and stable isotopes in precipitation exhibited significant positive correlations, with a gradient of 6.89‰·℃-1 for δD and 0.92‰·℃-1 for δ18O. The local meteoric water line (LMWL), established as δD=7.45δ18O+2.72(R2=0.98), had a lower slope and intercept than the global meteoric water line (GMWL), which was attributed to the effect of secondary evaporation, especially in summer. The variability of d-excess values in the Dunhuang Basin was mainly induced by the changes of air temperature and relative humidity. Generally, the moisture in the Dunhuang Basin was dominantly derived from westerly air masses all year round, and the region can receives polar air mass moisture transport in winter and spring, while some precipitation events was attributed to the water vapor transport from the southwest monsoon and local recycle moisture.
|
|
Received: 08 June 2014
Published: 20 May 2015
|
|
|
[1] 蓝永超, 丁永建, 沈永平, 等.河西内陆河流域出山径流对气候转型的响应[J].冰川冻土, 2003, 25(2):147-152.
[2] 高前兆, 仵彦卿.河西内陆河流域的水循环分析[J].水科学进展, 2004, 15(3):391-396.
[3] 谢自楚, 王欣, 康尔泗, 等.中国冰川径流的评估及其未来50年变化趋势预测[J].冰川冻土, 2006, 28(4):457-466.
[4] 王璞玉, 李忠勤, 高闻宇, 等.气候变化背景下近50年来黑河流域冰川资源变化特征分析[J].资源科学, 2011, 33(3):399-407.
[5] 高鑫, 张世强, 叶柏生, 等.河西内陆河流域冰川融水近期变化[J].水科学进展, 2011, 2(3):345-350.
[6] 何建华, 付素静, 马金珠, 等.北大河流域地下水化学演化与补给特征[J].中国沙漠, 2011, 31(6):1630-1638.
[7] 席海洋, 冯起, 司建华, 等.黑河下游绿洲NDVI对地下水位变化的响应研究[J].中国沙漠, 2013, 33(2):574-582.
[8] 张华安, 王乃昂, 李卓仑, 等.巴丹吉林沙漠东南部湖泊和地下水的氢氧同位素特征[J].中国沙漠, 2011, 31(6):1623-1629.
[9] 李文赞, 严平, 刘永刚, 等.库姆塔格沙漠东北缘浅层地下水补给来源[J].中国沙漠, 2011, 31(6):1617-1622.
[10] 张应华, 仵彦卿.黑河流域中游盆地地下水补给机理分析[J].中国沙漠, 2009, 29(2):370-375.
[11] Ma J, Wang X, Edmunds W.The characteristics of ground-water resources and their changes under the impacts of human activity in the arid Northwest China-a case study of the Shiyang River Basin[J].Journal of Arid Environments, 2005, 61:277-295.
[12] Zhu G, Li Z, Su Y, et al.Hydrogeochemical and isotope evidence of groundwater evolution and recharge in Minqin Basin, Northwest China[J].Journal of Hydrology, 2007, 333:239-251.
[13] Ma J Z, He J H, Qi S, et al.Groundwater recharge and evolution in the Dunhuang Basin, northwestern China[J].Applied Geochemistry, 2013, 28:19-31.
[14] 周海, 郑新军, 唐立松, 等.盐生荒漠土壤水稳定氢、氧同位素组成季节动态[J].中国沙漠, 2014, 34(1):162-169.
[15] Araguás-Araguás L, Froehlich K, Rozanski K.Stable isotope composition of precipitation over Southeast Asia[J].Journal of Geophysical Research, 1998, 103(D22):28721-28742.
[16] Hughes C, Crawford J.Spatial and temporal variation in precipitation isotopes in the Sydney Basin, Australia[J].Journal of Hydrology, 2013, 489:42-55.
[17] 田立德, 姚檀栋, 孙维贞, 等.青藏高原南北降水中δD和δ18O关系及水汽循环[J].中国科学(D辑), 2001, 31(3):214-220.
[18] 姚檀栋, 孙维贞, 蒲健辰, 等.内陆河流域系统降水中的稳定同位素[J].冰川冻土, 2000, 22(1):15-22.
[19] Tian L D, Yao T D, MacClune K, et al.Stable isotopic variations in west China:a consideration of moisture sources[J].Journal of Geophysical Research, 2007, 112:D10112.
[20] Rozanski K, Johnsen S J, Schotterer U, et al.Reconstruction of past climates from stable isotope records of palaeo-precipitation preserved in continental archives[J].Hydrological Sciences Journal, 1997, 42(5):725 745.
[21] McCarroll D, Loader N.Stable isotopes in tree rings[J].Quaternary Science Reviews, 2004, 23:771-801.
[22] Zhang J W, Chen F H, Holmes J, et al.Holocene monsoon climate documented by oxygen and carbon isotopes from lake sediments and peat bogs in China:a review and synthesis[J].Quaternary Science Reviews, 2011, 30(15-16):1973-1987.
[23] 张应华, 仵彦卿.黑河流域中上游地区降水中氢氧同位素与温度关系研究[J].干旱区地理, 2007, 30(1):16-21.
[24] 张应华, 仵彦卿.黑河流域中上游地区降水中氢氧同位素研究[J].冰川冻土, 2009, 31(1):34-39.
[25] Wu J K, Ding Y J, Ye B S, et al.Spatio-temporal variation of stable isotopes in precipitation in the Heihe River Basin, Northwestern China[J].Environmental Earth Sciences, 2010, 61:1123-1134.
[26] Zhao L J, Yin L, Xiao H L, et al.Isotopic evidence for the moisture origin and composition of surface runoff in the headwaters of the Heihe River basin[J].Chinese Science Bulliten, 2011, 56:406-416.
[27] Ma J Z, Zhang P, Zhu G F, et al.The composition and distribution of chemicals and isotopes in precipitation in the Shiyang River system, northwestern China[J].Journal of Hydrology, 2012, 436/437:92-101.
[28] 蓝永超, 刘金鹏, 丁宏伟, 等.1960-2012年河西内陆河上游山区降水量变化及其区域性差异分析[J].冰川冻土, 2013, 35(6):1474-1480.
[29] Dansgaard W.Stable isotopes in precipitation[J].Tellus B, 1964, 16:436-468.
[30] Craig H.Isotopic variations in meteoric waters[J].Science, 1961, 133:1702-1703.
[31] Gat J.Paleoclimate conditions in the Levant as revealed by the isotopic composition of paleowaters[J].Israel Meteorological Research Papers, 1981, 3:13-28.
[32] Jonsson C, Leng M, Rosqvist C, et al.Stable oxygen and hydrogen isotopes in sub-Arctic lake waters from northern Sweden[J].Journal of Hydrology, 2009, 376(1/2):143-151.
[33] Froehlich K, Gibson J, Aggarwal P.Deuterium excess in precipitation and its climatological significance[C]//Proceedings of Study of Environmental Change Using Isotope Techniques.Vienna, Austria:IAEA, 2002:54-66.
[34] Merlivat L, Jouzel J.Global climatic interpretation of the deuterium-oxygen 18 relationship for precipitation[J].Journal of Geophysical Research, 1979, 84:5029-5033.
[35] 杨玉忠, 吴青柏, 贠汉伯.北麓河多年冻土区降水及河水稳定同位素特征分析[J].水科学进展, 2013, 24(6):778-785. |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2015, Vol. 35 
