干旱区生态环境知识资源中心(Arid): 新疆夏季云下二次蒸发对雨滴稳定同位素影响的定量研究

Arid

	新疆夏季云下二次蒸发对雨滴稳定同位素影响的定量研究
其他题名	Quantitative study of sub-cloud secondary evaporation effect on stable isotopes in raindrops during summer in Xinjiang
	潘素敏 1; 张明军 1; 王圣杰 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2018
卷号	41 期号:3 页码:488-498
中文摘要	在干旱区,雨滴在云下降落易受到二次蒸发的影响,明确降水从云层底部降落到地面过程中稳定氢氧同位素的变化在同位素水文学研究中很有必要。基于新疆地面气象站逐小时的观测资料,采用改进后的Stewart模型,研究了新疆雨滴云下蒸发剩余比(从云下到近地面雨滴蒸发后剩余体积占原体积的百分率f)、雨滴中delta D变化量(Deltadelta D)和过量氘变化量(Delta d)的时空特征,并分析了Delta d与气象要素的关系。结果表明:(1)新疆降水中Delta d和蒸发剩余比存在明显的空间差异。 (2)当在气温低、相对湿度大、降水强度大、雨滴直径大的情况下,蒸发剩余比较大,Delta d接近于0,蒸发剩余比与Delta d间的线性关系明显,斜率较低。不同气象条件下,蒸发剩余比与Delta d的关系并不固定,利用这一线性关系反推蒸发剩余比应慎重。(3)敏感性分析可以得出,如果各气象站的气温升高2 ℃,Delta d降幅为0.26% ~ 3.10%;如果相对湿度升高5%,Delta d升幅为1.23% ~ 8.34%;如果雨强增大10%,Delta d升幅为0.06% ~ 0.89%;如果雨滴直径增加0.2 mm,Delta d升幅为0.98% ~ 8.16%,但雨滴直径增加量大于1.2 mm时,Delta d变化量趋于稳定。
英文摘要	In the arid area,the sub-cloud secondary evaporation usually occurs to the raindrops. It is important to understand the variation of the stable hydrogen and oxygen isotopes of the raindrops when they travel from cloud-base to the ground in the isotope hydrological studies. Based on the hourly meteorological observations from the meteorological stations in Xinjiang,China,the temporal and spatial characteristics of the sub-cloud evaporation residue ratio(which is the ratio of the residual volume of the raindrops after the evaporation as they travel from cloud-base to the near-surface to the original volume,f),the delta D variation(Deltadelta D)of the raindrops and the deuterium excess change(Deltad)were analyzed by using the modified Stewart model.The relationship between Deltad and meteorological parameters as well as the sensitivity analysis of Deltad were also analyzed.The results showed as follows:(1)The values of Deltad and f present spatial dependency in Xinjiang.(2)Under the conditions of low temperature,high relative humidity,high rainfall intensity and large raindrop diameter,f is usually large and Deltad is close to 0. The linear relationship between f and Deltad is evidenced and the slope is low.However the regression coefficients are not always stable under different meteorological conditions,thus the inversion computation of the parameter f based on this linear relationship should be treated with caution.(3)The sensitivity analysis indicates that,if the temperature was increased by 2 ℃,Deltad was decreased by 0.26-3.10;If the relative humidity was increased by 5%,Deltad was increased by 1.23-8.34;If precipitation intensity was increased by 10%,Deltad was increased by 0.06-0.89;If the raindrop diameter was increased by 0.2 mm,Deltad was increased by 0.98-8.16.However,if the raindrop diameter was larger than 1.2 mm,Deltad tended to be stable.
中文关键词	新疆 ; 降水 ; 稳定同位素 ; 云下蒸发 ; 过量氘
英文关键词	Xinjiang precipitation stable isotope sub-cloud evaporation deuterium excess
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:6333778
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/2XILL650/237595
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;;中国科学院西北生态环境资源研究院, ;;冰冻圈科学国家重点实验室, 兰州;;兰州, 甘肃;;甘肃 730070;;730000, 中国
推荐引用方式 GB/T 7714	潘素敏,张明军,王圣杰. 新疆夏季云下二次蒸发对雨滴稳定同位素影响的定量研究[J]. 西北师范大学,2018,41(3):488-498.
APA	潘素敏,张明军,&王圣杰.(2018).新疆夏季云下二次蒸发对雨滴稳定同位素影响的定量研究.干旱区地理,41(3),488-498.
MLA	潘素敏,et al."新疆夏季云下二次蒸发对雨滴稳定同位素影响的定量研究".干旱区地理 41.3(2018):488-498.