Space-time Characteristics and Environmental Significance of Stable Isotopes in Precipitation at an Arid Inland River Basin

被引：2

作者：

Yuan R.-F. ^{[1
]}

Li Z.-X. ^{[2
]}

Cai Y.-Q. ^{[3
]}

Zou H.-M. ^{[4
]}

机构：

[1] College of Geography and Environmental Science, Northwest Normal University, Lanzhou

[2] Key Laboratory of Ecohydrology of In-land River Basin/Gansu Hydrology and Water Resources Engineering Research Center, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou

[3] Tuotuo River Meteorological Station, Golmud Meteorological Bureau, Golmud

[4] Zhimenda Hydrological Station, Qinghai Provincial Hydrology and Water Resources Survey Bureau, Yushu

来源：

Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 05期

关键词：

Arid region; Environmental significance; Inland river basins; Precipitation; Stable isotope;

D O I：

10.13227/j.hjkx.201810039

中图分类号：

学科分类号：

摘要：

This study was based on one complete hydrological year sampling of precipitation and meteorological data of the Shiyang River Basin in the Wuwei Station (1 531 m a.s.l.), Minqin Station (1 389 m a.s.l.), and Xidahe Station(2 897 m a.s.l.) from July 2013 to July 2014. This paper aims to analyze temporal and spatial variation of stable isotopes in local precipitation, and discuss the impact of environmental factors during precipitation. The stable isotope evolution correlation with temperature, humidity, precipitation, vapor pressure, and average relative humidity is analyzed. The results show that: ①During the study period, the stable isotope of precipitation showed significant seasonal changes, lower in the winter and spring, higher in the summer and autumn; ②The monthly average D-excess of Wuwei Station is lower than that of Xidahe Station. In addition to the possibility of different water vapor sources, the high-altitude mountain areas are more affected by local recirculating water vapor, and the secondary evaporation under the clouds in low-altitude plain areas is stronger; ③The stable isotope of precipitation in the basin shows a significant temperature effect, and the precipitation effect is reflected on the weather scale, which may be affected by leaching or monsoon circulation; ④The δ18O value of precipitation is negatively correlated with the average relative humidity. It may be that the secondary evaporation under the cloud is weakened by the increase of precipitation and humidity. © 2019, Science Press. All right reserved.

引用

页码：2122 / 2131

页数：9

共 47 条

[1] Craig H., Isotopic variations in meteoric waters, Science, 133, 3465, pp. 1702-1703, (1961)
[2] Dansgaard W., Stable isotopes in precipitation, Tellus, 16, 4, pp. 436-468, (1964)
[3] Zhang Q., Zhang J., Sun G.W., Et al., Research on atmospheric water-vapor distribution over Qilianshan Mountains, Acta Meteorologica Sinica, 65, 4, pp. 633-643, (2007)
[4] Zhou S.Q., Nakawo M., Sakai A., Et al., Water isotope variations in the snow pack and summer precipitation at July 1 Glacier, Qilian Mountains in northwest China (SCI), Chinese Science Bulletin, 52, 21, pp. 2963-2972, (2007)
[5] Feng F., Li Z.Q., Jin S., Et al., Characteristics of δ<sup>18</sup>O and δD in precipitation and its water vapor sources in the upper Urumqi River basin, Eastern Tianshan, Advances in Water Science, 24, 5, pp. 634-641, (2013)
[6] Zhang Y.H., Wu Y.Q., Oxygen and Hydrogen isotopes in precipitation in Heihe River basin, China, Journal of Glaciology and Geocryology, 31, 1, pp. 34-39, (2009)
[7] Zhang Y.H., Wu Y.Q., Relation between oxygen and hydrogen isotopes in precipitation and temperature in Heihe river basin, China, Arid Land Geography, 30, 1, pp. 16-21, (2007)
[8] Wu J.K., Yang Q.Y., Ding Y.J., Et al., Variations and simulation of stable isotopes in precipitation in the Heihe River basin, Environmental Science, 32, 7, pp. 1857-1866, (2011)
[9] Ma J.Z., Zhang P., Zhu G.F., Et al., The composition and distribution of chemicals and isotopes in precipitation in the Shiyang River system, northwestern China, Journal of Hydrology, 436-437, pp. 92-101, (2012)
[10] Li Z.J., Song L.L., Tian Q., Et al., Spatial and temporal variation of chemical characteristics and source analysis of precipitation of Shiyang river basin, Earth and Environment, 44, 6, pp. 637-646, (2016)

← 1 2 3 4 5 →