干旱区生态环境知识资源中心(Arid): 西北干旱区降水中delta18O变化特征及其水汽输送

Arid

	西北干旱区降水中delta18O变化特征及其水汽输送
其他题名	Characteristics of delta18O in Precipitation and Moisture Transports over the Arid Region in Northwest China
	李小飞 1; 张明军 2; 李亚举 1; 王圣杰 1; 黄小燕 1; 马潜 1; 马雪宁 1
来源期刊	环境科学
ISSN	0250-3301
出版年	2012
卷号	33 期号:3 页码:711-719
中文摘要	以IAEA/WMO提供的乌鲁木齐(1986~2003年)、张掖(1986~2003年)与和田(1988~1992年)大气降水稳定同位素观测数据和相关气象要素为基础,通过回归分析得到西北干旱区大气降水方程,并对降水中稳定同位素的时空变化特征及其与气温和降水量的相关关系进行了分析;采用HYSPLIT4.9模型对3个站点水汽来源进行追踪,建立了西北干旱区的水汽输送模式,并对冰冻圈delta~(18)O的记录进行了探讨.结果表明,该区大气降水方程为deltaD=7.24delta~(18)O+1.96,局地蒸发较强烈;乌鲁木齐、张掖与和田降水中delta~(18)O分别波动于-20.58~-5.4、-18.58~-2.46和-20.33~-0.01,均表现出冬低夏高的特点,而d值则表现为冬高夏低;从空间分布来看,delta~(18)O张掖最高,和田次之,乌鲁木齐最低,d值则乌鲁木齐最高,和田次之,张掖最低;降水中delta~(18)O温度效应显著,相关系数分别为0.85、0.81、0.86,而降水量效应不存在;水汽来源轨迹表明,该区全年有两条水汽路径,分别为西风带输送的大西洋海源水汽以及极地北冰洋地区水汽,受其影响delta~(18)O冬半年较低,夏半年则较高;由于冰冻圈环境的独特性,该区冰川雪冰中delta~(18)O的变化与相应的气象站记录对应关系良好,很好地反映着气温的变化.
英文摘要	Based on the observed data of stable isotopes in precipitation and meteorological statistics at urumqi(1986-2003),Zhangye(1986-2003),and Hotan(1988-1992) from IAEA/WMO,the precipitation equation of arid region in Northwest China was calculated through the regression analysis,and the characteristics of stable isotopic in precipitation,as well as the correlation between stable isotopic and meteorological records,were analyzed.The water vapor source of the three sites was tracked by the HYSPLIT4.9 model,and water vapour transmission regime of arid region in Northwest China was established,while the record of delta~(18) O in cryosphere was discussed.Results showed that the precipitation equation of deltaD=7.24delta~(18) O+1.96 indicates intense evaporation;delta~(18) O values at urumqi,Zhangye and Hotan fluctuates at-20.585.4,-18.582.46 and-20.330.01,respectively.The delta~(18) O value is low in winter and high in summer,but the values of d-excess is on the contrary;The spatial distribution shows that delta~(18) O value at Zhangye is highest,followed by Hotan,and the lowest is at urumqi;The highest of d-excess value is at urumqi,followed by Hotan,the lowest is at Zhangye;The temperature effect of delta~(18) O in precipitation is significant with the correlation coefficients of 0.85,0.81 and 0.86,respectively,and the rainfall effect does not exist;The modeled trajectory of vapor source showed there are two main paths all the year,which are from the Atlantic Ocean via Westerlies and the Arctic region,respectively,influence by different vapor sources,the seasonality of delta~(18) O values lower in winter,higher in summer;In addition,according to the cryospheric environment,the correlation between delta~(18) O in snow pack or ice core and the corresponding meteorological station record was significant,which reflects the variation of temperature efficiently.
中文关键词	稳定同位素 ; 水汽来源 ; 大气降水 ; 冰冻圈 ; 西北干旱区
英文关键词	stable isotopes water vapour source precipitation cryosphere arid region in Northwest China
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4451134
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228244
作者单位	1.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国; 2.西北师范大学地理与环境科学学院, 冰冻圈科学国家重点实验室/天山冰川观测试验站, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	李小飞,张明军,李亚举,等. 西北干旱区降水中delta18O变化特征及其水汽输送[J]. 西北师范大学,2012,33(3):711-719.
APA	李小飞.,张明军.,李亚举.,王圣杰.,黄小燕.,...&马雪宁.(2012).西北干旱区降水中delta18O变化特征及其水汽输送.环境科学,33(3),711-719.
MLA	李小飞,et al."西北干旱区降水中delta18O变化特征及其水汽输送".环境科学 33.3(2012):711-719.