Isotopic characteristics and vapor sources of atmospheric precipitation in the loess region of North Shaanxi, China

doi:10.13287/j.1001-9332.202206.011

Abstract

Abstract: To explore the hydrogen and oxygen stable isotopes and vapor sources of atmospheric precipitation in the loess region of north Shaanxi, we collected 107 samples of precipitation during 2018 to 2020 in the Dingbian County, Shaanxi Province. After measuring δ¹⁸O and δ²H of precipitation, we analyzed the isotopic characteristics and vapor sources of precipitation in different seasons. There was obvious seasonal variability in δ¹⁸O and δ²H, in that they were more depleted in the wet season (June-September) but more enriched in the dry season (April-May, October-November). In addition, the deuterium excess values were high in the dry season but low in the wet season. The local meteoric water line was regressed as δ²H=7.35δ¹⁸O+4.19 (R²=0.96, P<0.01) with slope and intercept lower than that of the global meteoric water line, indicating an impact of evaporation on isotope fractionation. There was temperature effect in the precipitation isotopes for the whole year and for the dry season, while the precipitation isotopes in the wet season were affected by the combined effects of temperature and rainfall amount. The HYSPLIT model showed that the dry season water vapor mainly came from the Atlantic Ocean and the polar Arctic Ocean, while the wet season vapor mainly came from the Indian Ocean and Pacific subject to the Westerly.

Key words: loess region, hydrogen and oxygen stable isotope, environmental factor, HYSPLIT, water vapor source

LI Jia-qi, HUANG Ya-nan, SHI Pei-jun, LI Zhi. Isotopic characteristics and vapor sources of atmospheric precipitation in the loess region of North Shaanxi, China[J]. Chinese Journal of Applied Ecology, 2022, 33(6): 1459-1465.

References

[1] 顾熨祖. 同位素水文学. 北京: 科学出版社, 2011: 112-115
[2] 高德强, 张蓓蓓, 徐庆, 等. 氢氧稳定同位素在淡水湿地森林水文过程研究中的应用. 世界林业研究, 2017, 30(2): 20-25
[3] 徐英德, 汪景宽, 高晓丹, 等. 氢氧稳定同位素技术在土壤水研究上的应用进展. 水土保持学报, 2018, 32(3): 1-15
[4] Dansgaard W. Stable isotopes in precipitation. Tellus, 1964, 16: 436-468
[5] 王宝鉴, 黄玉霞, 陶健红, 等. 西北地区大气水汽的区域分布特征及其变化. 冰川冻土, 2006, 28(1): 16-21
[6] 饶文波, 李垚炜, 谭红兵, 等. 高寒干旱区降水氢氧稳定同位素组成及其来源: 以昆仑山北坡格尔木河流域为例. 水利学报, 2021, 52(9): 1116-1125
[7] Shi YS, Jin ZF, Wu AJ, et al. Stable isotopic characteristics of precipitation related to the environmental controlling factors in Ningbo, East China. Environmental Science and Pollution Research, 2021, 28: 10696-10706
[8] 陈琦, 郭锦荣, 李超, 等. 庐山地区大气降水中稳定同位素变化特征. 自然资源学报, 2019, 34(6): 1306-1316
[9] 赵明华, 陆彦玮, Rachana Heng, 等. 关中平原降水氢氧稳定同位素特征及其水汽来源. 环境科学, 2020, 41(7): 3149-3156
[10] Ansari MA, Noble J, Deodhar A. Atmospheric factors controlling the stable isotopes (δ¹⁸O and δ²H) of the Indian summer monsoon precipitation in a drying region of Eastern India. Journal of Hydrology, 2020, 584: 124636
[11] Bershaw J. Controls on deuterium excess across Asia. Geosciences, 2018, 8: 257
[12] Wu JK, Ding Y, Ye B, et al. Spatio-temporal variation of stable isotopes in precipitation in the Heihe River Basin, Northwestern China. Environmental Earth Sciences, 2010, 61: 1123-1134
[13] Ma Q, Zhang MJ, Wang SJ, et al. An investigation of moisture sources and secondary evaporation in Lanzhou, Northwest China. Environmental Earth Sciences, 2013, 71: 3375-3385
[14] Wang SJ, Jiao R, Zhang MJ, et al. Changes in below-cloud evaporation affect precipitation isotopes during five decades of warming across China. Journal of Geophysical Research: Atmospheres, 2021, 126: e2020JD033075
[15] 李小飞, 张明军, 王圣杰, 等. 黄河流域大气降水氢氧稳定同位素时空特征及其环境意义. 地质学报, 2013, 87(2): 270-277
[16] 曾康康, 杨余辉, 胡义成, 等. 喀什河流域降水同位素特征及水汽来源分析. 干旱区研究, 2021, 38(5): 1263-1273
[17] 郑淑慧, 侯发高, 倪葆龄. 我国大气降水的氢氧稳定同位素研究. 科学通报, 1983, 28(13): 801-806
[18] 章新平, 姚檀栋. 我国降水中δ¹⁸O的分布特点. 地理学报, 1998, 53(4): 356-364
[19] 庞朔光, 赵诗坤, 文蓉, 等. 海河流域大气降水中稳定同位素的时空变化. 科学通报, 2015, 60(13): 1218-1226
[20] 袁瑞丰, 李宗省, 蔡玉琴, 等. 干旱内陆河流域降水稳定同位素的时空特征及环境意义. 环境科学, 2019, 40(5): 2123-2131
[21] 柳鉴容, 宋献方, 袁国富, 等. 西北地区大气降水δ¹⁸O的特征及水汽来源. 地理学报, 2008, 63(1): 13-22
[22] 陈曦, 李志, 程立平, 等. 黄土塬区大气降水的氢氧稳定同位素特征及水汽来源. 生态学报, 2016, 36(1): 99-106
[23] 柳鉴容, 宋献方, 袁国富, 等. 我国南部夏季季风降水水汽来源的稳定同位素证据. 自然资源学报, 2007, 22(6): 1004-1012
[24] 李广, 章新平, 许有鹏, 等. 滇南蒙自地区降水稳定同位素特征及其水汽来源. 环境科学,2016,37(4): 1313-1320
[25] 隋明浈, 高德强, 徐庆, 等. 江苏高邮大气降水氢氧同位素特征及水汽来源. 应用生态学报, 2019, 30(6): 1823-1832
[26] 张君, 陈洪松, 黄荣. 桂西北喀斯特小流域降雨稳定氢氧同位素组成及影响因素. 生态学报, 2022, 42(1): 236-245
[27] 徐秀婷, 贾文雄, 朱国锋, 等. 乌鞘岭南、北坡降水稳定同位素特征及水汽来源对比. 环境科学, 2020, 41(1): 155-165
[28] Sun CJ, Chen W, Chen YN, et al. Stable isotopes of atmospheric precipitation and its environmental drivers in the Eastern Chinese Loess Plateau, China. Journal of Hydrology, 2020, 581: 124404
[29] 卫克勤, 林瑞芬. 论季风气候对我国雨水同位素组成的影响. 地球化学, 1994, 23(1): 34-41
[30] 张峦, 朱志鹏, 杨言, 等. 上海地区大气降水中氢氧同位素特征及其环境意义. 地球与环境, 2020, 48(1): 120-128
[31] Wei Z, Lee XH. The utility of near-surface water vapor deuterium excess as an indicator of atmospheric moisture source. Journal of Hydrology, 2019, 557: 123923