干旱区生态环境知识资源中心(Arid): 雾水的D和~(18)O同位素研究进展

Arid

	雾水的D和~(18)O同位素研究进展
其他题名	Advances in the D and ~(18)O Isotopes of Fog Water
	孙自永 1; 程国栋 2; 马瑞 1; 甘义群 1
ISSN	1001-8166
出版年	2008
卷号	23 期号:8 页码:794-802
中文摘要	凝结水的D、~(18)O同位素研究目前主要集中在雾水方面,露水和土壤吸附水的相关研究仍属空白.由于形成时的温度较高,大多数雾水的D、~(18)O同位素较当地雨水富集,但不同类型雾的同位素特征存在差异.平流式海洋雾为单级的蒸发-冷凝封闭循环系统的首次凝结,D、~(18)O同位素较当地雨水显著富集;热带云雾林中的地形雾与降雨同时发生,且水分源于同一云团,deltaD、delta~(18)O值差异较小;内陆辐射雾因部分水汽源于当地水分的再循环,过量氘和deltaD、delta~(18)O值高于降雨.目前有少量研究用D、~(18)O同位素指示雾水对植被、地下水和地表径流的补给作用,但以定性分析为主,基于端元混合模型的定量评价极少.露水和土壤吸附水的稳定同位素研究是干旱区凝结水研究的重要方向;D、~(18)O同位素与其它同位素或化学指标的结合有助于促进凝结水生态水文效应的研究进展;短间隔、高密度的长期观测和用于稳定同位素分析的凝结水采样器的设计是需要进一步开展的工作.
英文摘要	The previous studies on stable isotopes of condensation water are all about fog,without any study about dew or water vapor adsorbed by soil.In most of the studies,more isotopes have been found in fog than in rainfall,due to differences in the temperature of condensation of the water vapor,as well as the history of the air mass producing the precipitation.Fog isotope values have a large range depending on the temperatures and vapor sources in the study areas.Advective oceanic fog is quite isotopically enriched compared to rain in the same area because it is an early-stage condensate representing a single-stage evaporation(over the open ocean)-condensation(at the coast) cycle.In tropical cloud forest where orographic fog and rain are from the same cloud and occur simultaneously,fog has been found to be more isotopically enriched than rain,but differences between fog and rain are relatively small.Inland radiation fog,with water vapor partially originating from terrestrially recycled water,has the larger deuterium excess value and deltaD and delta~(18)O values than precipitation originating from water vapor evaporated from the oceans.Stable isotope techniques have been used in a few cases to evaluate possible contribution of fog water to stream flow,plant transpiration,or groundwater recharge.But few studies assessed quantitatively the contribution employing end-member mixing model.Directions for future research may include the stable isotope studies of dew and water vapor absorbed by soil in arid regions,the combination of D and ~(18)O with other isotopes or chemical indexes to evaluate eco-hydrological roles of fog,the long-term and intensive sampling strategies in stable isotope studies of condensation water,and the design of fog collectors for stable isotope samples.
中文关键词	凝结水 ; 雾 ; 稳定同位素 ; 生态水文效应
英文关键词	Condensation water Fog Stable isotope Eco-hydrological role
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:3337934
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222143
作者单位	1.(武汉)中国地质大学环境学院, 武汉, 湖北 430074, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	孙自永,程国栋,马瑞,等. 雾水的D和~(18)O同位素研究进展[J]. 中国科学院西北生态环境资源研究院,2008,23(8):794-802.
APA	孙自永,程国栋,马瑞,&甘义群.(2008).雾水的D和~(18)O同位素研究进展.,23(8),794-802.
MLA	孙自永,et al."雾水的D和~(18)O同位素研究进展".23.8(2008):794-802.