干旱区生态环境知识资源中心(Arid): 西鄂尔多斯荒漠夏季大气降水氢氧同位素特征与水汽来源

Arid

	西鄂尔多斯荒漠夏季大气降水氢氧同位素特征与水汽来源
其他题名	Characteristics of deltaD and delta~(18)O in Summer Precipitation in the West Ordos Desert and Its Water Vapor Sources
	陈婕 1; 高德强 1; 徐庆 1; 郝玉光 2; 马迎宾 1; 张蓓蓓 1
来源期刊	林业科学研究
ISSN	1001-1498
出版年	2016
卷号	29 期号:6 页码:911-918
中文摘要	[目的]内蒙古西鄂尔多斯荒漠生态环境脆弱、气候变化较敏感,探究该地区大气降水氢氧稳定同位素组成及其水汽来源,对揭示我国西鄂尔多斯荒漠生态系统水循环过程、减缓或防止土地沙漠化和制定区域水资源合理利用策略等具有重要的理论意义。[方法]本研究运用稳定同位素技术,分析了西鄂尔多斯荒漠夏季大气降水的deltaD和delta~(18)O组成、关系及其影响因素,同时,运用HYSPLIT气团轨迹模型判定了该地区夏季大气降水的水汽来源。[结果]西鄂尔多斯夏季大气降水氢氧稳定同位素关系为deltaD = 7.287delta~(18)O + 1.170;大气降水deltaD(delta~(18)O)与降水量呈负相关关系(P < 0.05),与温度无显著相关性(P > 0.05);大气降水过量氘(d-excess)均为正值且小于全球平均d值(10),表明该地区受到了海洋季风作用的影响; HYSPLIT气团轨迹模型得出西鄂尔多斯荒漠在6月和8月的水汽来源于大量局地蒸发和西北方向的水汽,特大暴雨(> 30 mm)是受到东南季风的影响;而7月的水汽来源于东南和西南方向海洋性水汽团。[结论]西鄂尔多斯荒漠大气降水经历了一定程度的蒸发作用;西鄂尔多斯夏季降水量效应显著,温度效应不显著;夏季降水受到西北方向、东南和西南方向季风以及局地蒸发水汽的共同影响。
英文摘要	[Objective]The ecological environment and climate in the West Ordos Desert of Inner Mongolia is fragile and sensitive. Study on the hydrogen(deltaD) and oxygen(delta~(18)O) stable isotopic compositions and sources of precipitation in the West Ordos Desert is theoretically important to reveal the process of hydrological cycle in the West Ordos Desert and develop strategies for reducing or preventing land desertification and the use of regional water resource. [Methods]By using stable isotope technique,the compositions and relationships of deltaD and delta~(18)O in precipitation and the effect of climatic factors on them in West Ordos Desert in summer were analyzed. Furthermore,the water vapor sources were determined based on HYSPLIT model. [Results]The relationship of deltaD and delta~(18)O in precipitation in summer was deltaD = 7.287delta~(18)O + 1.170. An apparent inverse correlation between stable isotopes and precipitation existed in the West Ordos Desert in summer(P < 0.05),but no significant correlation was found between stable isotopes and temperature(P > 0.05). The d-excess was positive and less than the global average d-excess(10),indicating that the precipitation in the West Ordos Desert was affected by ocean monsoon. The results of air mass back trajectories of summer precipitation using the HYSPLIT model indicated a dominant effect of local evaporation and continental northwesterly monsoon air masses in June and August,an effect of southeasterly monsoon on heavy rainfall(> 30 mm),and the co-influence of oceanic monsoons southeasterly and southwesterly air masses in July. [Conclusion]The precipitation in the West Ordos Desert experiences evaporation effect. Analysis of precipitation and temperature effects indicates that theamount effectexists significantly,whereas thetemperature effectis not obvious during summer. The water vapor from continental northwesterly,oceanic monsoons southeasterly and southwesterly,and local evaporation collectively have influence on precipitation in summer in the West Ordos Desert.
中文关键词	西鄂尔多斯荒漠 ; 大气降水 ; 水汽来源 ; 氢氧稳定同位素
英文关键词	West Ordos Desert meteoric water water resource hydrogen and oxygen stable isotopes
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:5888069
来源机构	中国林业科学研究院沙漠林业实验中心
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234568
作者单位	1.中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国; 2.中国林业科学研究院沙漠林业实验中心, 磴口, 内蒙古 015200, 中国
推荐引用方式 GB/T 7714	陈婕,高德强,徐庆,等. 西鄂尔多斯荒漠夏季大气降水氢氧同位素特征与水汽来源[J]. 中国林业科学研究院沙漠林业实验中心,2016,29(6):911-918.
APA	陈婕,高德强,徐庆,郝玉光,马迎宾,&张蓓蓓.(2016).西鄂尔多斯荒漠夏季大气降水氢氧同位素特征与水汽来源.林业科学研究,29(6),911-918.
MLA	陈婕,et al."西鄂尔多斯荒漠夏季大气降水氢氧同位素特征与水汽来源".林业科学研究 29.6(2016):911-918.