海河流域降水稳定同位素的云底二次蒸发效应

doi:10.18306/dlkxjz.2015.08.010

摘要/Abstract

摘要：

云底二次蒸发导致的同位素动力分馏可显著影响观测的降水同位素组成和大气水线。本文利用海河流域7个监测站点的降水δ²H和δ¹⁸O数据,分析了云底二次蒸发对流域降水同位素的影响。结果表明：流域降雨水样的大气水线为δ²H=7.19δ¹⁸O-0.74,显著不同于降雪水样的大气水线(δ²H=8.42δ¹⁸O+15.88);流域降雨,特别是小降雨(<5 mm)事件,易受到云底二次蒸发的影响,导致其大气水线的斜率和截距均随着降雨量的减小而减小。流域降雨同位素的云底二次蒸发主要受气温和相对湿度控制,随着气温的升高和相对湿度的减小,云底二次蒸发加剧,导致观测的地面降雨富集重的同位素,同时伴随的同位素动力分馏导致流域降水过量氘(d)值以及大气水线的斜率和截距均减小。与平原地区相比较,流域山间盆地地区受“雨影效应”影响,气候相对干燥,其降雨同位素受更强的云底二次蒸发影响。观测期间,流域小的降雨事件占总降水事件的42%,故云底二次蒸发对流域降水同位素具有重要的影响。

关键词: 降水, δ2H 和δ18O, 气温, 相对湿度, 云底二次蒸发, 海河流域

Abstract:

Measurement of stable water isotopes (δ²H and δ¹⁸O) at the watershed scale can provide a diagnostic indication for hydrological processes and water cycling of the watershed. Kinetic isotope fractionation associated with below-cloud secondary evaporation can significantly affect the observed precipitation isotopic composition and local meteoric water line. Stable isotope composition of δ²H and δ¹⁸O in precipitation was investigated in the Haihe River Basin, northern China based on observations at seven stations from July 2012 to January 2013. Linear regression between δ²H and δ¹⁸O values of rain samples yielded a correlation equation of δ²H=7.19δ¹⁸O-0.74, which is significantly different from that based on snow samples (δ²H=8.42δ¹⁸O+15.88). Due to the influence of below-cloud secondary evaporation on rain isotopes, the slope and intercept of correlation between δ²H and δ¹⁸O for small amount rainfall samples (<5 mm) progressively decreased with decreasing precipitation, varying from 6.73 to 7.61 and 5.28‰ to -11.04‰, respectively. Correlation of isotope values with local temperature, relative humidity, and precipitation amount provides evidence that small amount rainfall samples underwent secondary evaporation accompanied by mass dependent isotope fractionation during their descent from the cloud base to the ground. Compared to sites in the plain areas, rain stable isotopes at sites in the mountainous areas tended to be influenced by below-cloud secondary evaporation due to the dry atmosphere caused by the rain shadow effect. Since about half of the precipitation events in the observation period were rain samples with amount less than 5 mm, below-cloud secondary evaporation had an important influence on isotope composition of precipitation in the Haihe River Basin. Our study suggests that analysis of isotope composition of individual rainfall events can provide some valuable insight into below-cloud secondary evaporation effect, which is masked to a large extent by analysis of monthly precipitation isotope data.

Key words: precipitation, δ2H and δ18O, temperature, relative humidity, below-cloud secondary evaporation, Haihe River Basin

赵诗坤, 庞朔光, 文蓉, 刘忠方. 海河流域降水稳定同位素的云底二次蒸发效应[J]. 地理科学进展, 2015, 34(8): 1031-1038.

ZHAO Shikun, PANG Shuoguang, WEN Rong, LIU Zhongfang. Influence of below-cloud secondary evaporation on stable isotope composition in precipitation in the Haihe River Basin, China[J]. PROGRESS IN GEOGRAPHY, 2015, 34(8): 1031-1038.

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参考文献 34

1	刘春蓁, 刘志雨, 谢正辉. 2004. 近50年海河流域径流的变化趋势研究[J]. 应用气象学报, 15(4):385-393.
	[Liu C Z, Liu Z Y, Xie Z H.2004. Study of trends in runoff for the Haihe River Basin in recent 50 years[J]. Journal of Applied Meteorological Science, 15(4): 385-393. ]
2	刘相超, 宋献方, 夏军, 等. 2005. 东台沟实验流域降水氧同位素特征与水汽来源[J]. 地理研究, 24(2): 196-205.
	[Liu X C, Song X F, Xia J, et al.2005. A study on oxygen isotope in precipitation of Dongtaigou Basin in Chao and Bai River Basin[J]. Geographical Research, 24(2): 196-205. ]
3	孟玉川, 刘国东. 2010. 长江流域降水稳定同位素的云下二次蒸发效应[J]. 水科学进展, 21(3): 327-334.
	[Meng Y C, Liu G D.2010. Effect of below-cloud secondary evaporation on the stable isotopes in precipitation over the Yangtze River basin[J]. Advances in Water Science, 21(3): 327-334. ]
4	庞朔光, 赵诗坤, 文蓉, 等. 2015. 海河流域大气降水中稳定同位素的时空变化[J]. 科学通报, 60(13): 1218-1226.
	[Pang S G, Zhao S K, Wen R, et al.2015. Spatial and temporal variation of stable isotopes in precipitation in the Haihe River basin[J]. Chinese Science Bulletin, 60(13): 1218-1226. ]
5	王中根, 朱新军, 夏军, 等. 2008. 海河流域分布式SWAT模型的构建[J]. 地理科学进展, 27(4): 1-6.
	[Wang Z G, Zhu X J, Xia J, et al.2008. Study on distributed hydrological model in Hai River Basin[J]. Progress in Geography, 27(4): 1-6. ]
6	卫克勤, 林瑞芬, 王志祥. 1982. 北京地区降水中的氘、氧-18、氚含量[J]. 中国科学: 化学, 12(8): 754-757.
	[Wei K Q, Lin R F, Wang Z X.1982. Beijing diqu jiangshui zhong de dao, yang-18, chuan hanliang[J]. Science China: Chemistry, 12(8): 754-757. ]
7	夏军. 2002. 华北地区水循环与水资源安全: 问题与挑战[J]. 地理科学进展, 21(6): 517-526.
	[Xia J.2002. A perspective on hydrological base of water security problem and its application study in North China[J]. Progress in Geography, 21(6): 517-526. ]
8	Araguás-Araguás L, Froehlich K, Rozanski K.1998. Stable isotope composition of precipitation over southeast Asia[J]. Journal of Geophysical Research, 103(D22): 28721-28742.
9	Chu J T, Xia J, Xu C Y, et al.2010. Spatial and temporal variability of daily precipitation in Haihe River basin, 1958-2007[J]. Journal of Geographical Sciences, 20(2): 248-260.
10	Clark I D, Fritz P, Michel F A, et al.1982. Isotope hydrogeology and geothermometry of the Mount Meager geothermal area[J]. Canadian Journal of Earth Sciences, 19(7): 1454-1473.
11	Craig H.1961. Isotopic variations in meteoric waters[J]. Science, 133: 1702-1703.
12	Dansgaard W.1964. Stable isotopes in precipitation[J]. Tellus, 16(4): 436-468.
13	Field R D, Jones D B A, Brown D P.2010. Effects of postcondensation exchange on the isotopic composition of water in the atmosphere[J]. Journal of Geophysical Research, 115(D24), doi: 10.1029/2010JD014334.
14	Friedman I, Machta L, Soller R.1962. Water-vapor exchange between a water droplet and its environment[J]. Journal of Geophysical Research, 67(7): 2761-2766.
15	Froehlich K, Kralik M, Papesch W, et al.2008. Deuterium excess in precipitation of Alpine regions-moisture recycling[J]. Isotopes in Environmental and Health Studies, 44(1): 61-70.
16	Gat J R.1996. Oxygen and hydrogen isotopes in the hydrologic cycle[J]. Annual Review of Earth and Planetary Sciences, 24(1): 225-262.
17	Hoffmann G, Werner M, Heimann M.1998. Water isotope module of the ECHAM atmospheric general circulation model: a study on timescales from days to several years[J]. Journal of Geophysical Research, 103(D14): 16871-16896.
18	Jouzel J, Alley R B, Cuffey K M, et al.1997. Validity of the temperature reconstruction from water isotopes in ice cores[J]. Journal of Geophysical Research, 102(C12): 26471-26487.
19	Jouzel J, Hoffmann G, Koster R D, et al.2000. Water isotopes in precipitation: data/model comparison for present-day and past climates[J]. Quaternary Science Reviews, 19(1-5): 363-379.
20	Jouzel J, Merlivat L.1984. Deuterium and oxygen 18 in precipitation: modeling of the isotopic effects during snow formation[J]. Journal of Geophysical Research, 89(D7): 11749-11757.
21	Kong Y L, Pang Z H, Froehlich K.2013. Quantifying recycled moisture fraction in precipitation of an arid region using deuterium excess[J]. Tellus B, 65: 19251.
22	Lee J E, Fung I.2008. "Amount effect" of water isotopes and quantitative analysis of post-condensation processes[J]. Hydrological Processes, 22(1): 1-8.
23	Lee J E, Risi C, Fung I, et al.2012. Asian monsoon hydrometeorology from TES and SCIAMACHY water vapor isotope measurements and LMDZ simulations: implications for speleothem climate record interpretation[J]. Journal of Geophysical Research, 117(D15), doi: 10.1029/2011JD017133.
24	Liu J R, Song X F, Fu G B, et al.2011. Precipitation isotope characteristics and climatic controls at a continental and an island site in Northeast Asia[J]. Climate Research, 49(1): 29-44.
25	Liu Z F, Tian L D, Yao T D, et al.2008. Seasonal deuterium excess in Nagqu precipitation: influence of moisture transport and recycling in the middle of Tibetan Plateau[J]. Environmental Geology, 55(7): 1501-1506.
26	Liu Z F, Yoshimura K, Kennedy C D, et al.2014. Water vapor δ D dynamics over China derived from SCIAMACHY satellite measurements[J]. Science China: Earth Sciences, 57(4): 813-823.
27	Ma Q, Zhang M J, Wang S J, et al.2014. An investigation of moisture sources and secondary evaporation in Lanzhou, Northwest China[J]. Environmental Earth Sciences, 71(8): 3375-3385.
28	Merlivat L, Jouzel J.1979. Global climatic interpretation of the deuterium-oxygen 18 relationship for precipitation[J]. Journal of Geophysical Research: Oceans (1978-2012), 84(C8): 5029-5033.
29	Peng H D, Mayer B, Harris S, et al.2004. A 10-yr record of stable isotope ratios of hydrogen and oxygen in precipitation at Calgary, Alberta, Canada[J]. Tellus B, 56(2): 147-159.
30	Peng H D, Mayer B, Harris S, et al.2007. The influence of below-cloud secondary effects on the stable isotope composition of hydrogen and oxygen in precipitation at Calgary, Alberta, Canada[J]. Tellus B, 59(4): 698-704.
31	Risi C, Bony S, Vimeux F, et al.2010. Evolution of the stable water isotopic composition of the rain sampled along Sahelian squall lines[J]. Quarterly Journal of the Royal Meteorological Society, 136(S1): 227-242.
32	Stewart M K.1975. Stable isotope fractionation due to evaporation and isotopic exchange of falling waterdrops: applications to atmospheric processes and evaporation of lakes[J]. Journal of Geophysical Research, 80(9): 1133-1146.
33	Wen X F, Zhang S C, Sun X M, et al.2010. Water vapor and precipitation isotope ratios in Beijing, China[J]. Journal of Geophysical Research, 115(D1): D01103, doi: 10.1029/2009JD012408.
34	Yoshimura K, Oki T, Ohte N, et al.2003. A quantitative analysis of short-term 18O variability with a Rayleigh-type isotope circulation model[J]. Journal of Geophysical Research, 108(D20), doi: 10.1029/2003JD003477.

站点	纬度/°N	经度/°E	海拔/m	记录时间	样品数量	数据来源
长治	36.05	113.07	991.8	2012.7-2013.1	24	本研究
惠民	37.43	117.53	11.7	2012.7-2013.1	33	本研究
原平	38.03	112.72	828.2	2012.7-2013.1	36	本研究
涿州	38.85	115.52	17.2	2012.7-2013.1	29	本研究
乐亭	39.43	118.88	10.5	2012.7-2013.1	42	本研究
大同	40.10	113.33	1067.2	2012.7-2013.1	33	本研究
多伦	42.18	116.47	1245.4	2012.7-2013.1	47	本研究
石家庄	38.03	114.42	80.0	1985-1991,1995-2003	90	GNIP
天津	39.10	117.17	3.0	1988-1922,2000-2001	64	GNIP

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