Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2019.04.022 |
Environmental significance and zonal characteristics of stable isotope of atmospheric precipitation in arid Central Asia | |
Li Zong-Jie1; Li Zong-Xing2; Yu Hai-Chao1; Song Ling-Ling3; Ma Jin-Zhu1 | |
2019-10-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2019 |
卷号 | 227页码:24-40 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | To analyse the environmental significance and zonal characteristics of stable isotopes of precipitation in Arid Central Asia systematically, this study took the Pan-Hexi region as an example study area. A total of 1747 precipitation samples were collected from 25 sampling points from May 2013 to July 2014. The results showed that the elevation effects of delta O-18 and delta H-2 of precipitation in the Pan-Hexi region were - 0.07 parts per thousand/100 m and - 0.17 parts per thousand/100 m, respectively. However, the elevation effects of delta O-18 and delta H-2 were lower in the oasis area than the mountainous section of the study area. The temperature effect was significant in the oasis area when the temperature was < 10 degrees C and > 15 degrees C, but it was only significant in the mountain area when the temperature was < 0 degrees C. The evaporation rate of falling raindrops (f) and the enrichment rate (E) were significantly higher in the oasis area (E: 34.87%; f: 20%) than in the mountain area (E: 20.56%; f: 11.71%), and the E and f values showed a significant decreasing trend from oasis area to mountain area. Sub-cloud evaporation had a significant effect on the stable isotopes in precipitation. It was found that if f increases by 1%, E increases by 0.58% in the oasis area and by 0.86% in the mountain area. The precipitation amount effect mainly occurs during summer (June to August) in the Pan-Hexi region, especially in the oasis area. This effect was caused mainly by sub-cloud evaporation rather than by monsoon circulation. Further analysis demonstrated that when precipitation is higher, sub-cloud evaporation of falling raindrops is lower and enrichment of delta O-18 is weaker. Therefore, rainfall events with higher precipitation amounts had more depleted delta O-18 and vice versa. Thus, it can be concluded that precipitation amount effect in the study area is dominated by sub-cloud evaporation, which provides new information pertaining to the isotopic evolution of precipitation in arid regions. |
英文关键词 | Environmental significance Zonal characteristics Stable isotope Precipitation Arid Central Asia |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000472688500003 |
WOS关键词 | TIBETAN PLATEAU ; SECONDARY EVAPORATION ; MOISTURE TRANSPORT ; DEUTERIUM EXCESS ; QILIAN MOUNTAINS ; HEXI REGION ; OXYGEN ; WATER ; DELTA-O-18 ; RAINFALL |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187182 |
专题 | 地球科学 |
作者单位 | 1.Lanzhou Univ, Coll Earth Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China; 2.Chinese Acad Sci, Gansu Qilian Mt Ecol Res Ctr, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Gansu, Peoples R China; 3.Gansu Agr Univ, Coll Forestry, Lanzhou 730070, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Li Zong-Jie,Li Zong-Xing,Yu Hai-Chao,et al. Environmental significance and zonal characteristics of stable isotope of atmospheric precipitation in arid Central Asia[J]. ATMOSPHERIC RESEARCH,2019,227:24-40. |
APA | Li Zong-Jie,Li Zong-Xing,Yu Hai-Chao,Song Ling-Ling,&Ma Jin-Zhu.(2019).Environmental significance and zonal characteristics of stable isotope of atmospheric precipitation in arid Central Asia.ATMOSPHERIC RESEARCH,227,24-40. |
MLA | Li Zong-Jie,et al."Environmental significance and zonal characteristics of stable isotope of atmospheric precipitation in arid Central Asia".ATMOSPHERIC RESEARCH 227(2019):24-40. |
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