...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric research >Stable isotope variations in precipitation in the northwesternmost Tibetan Plateau related to various meteorological controlling factors
【24h】

Stable isotope variations in precipitation in the northwesternmost Tibetan Plateau related to various meteorological controlling factors

机译：青藏高原西北部降水稳定同位素变化与各种气象控制因素的关系

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Precipitation plays an important role in global water cycle, and the stable hydrogen and oxygen isotopes of precipitation provide useful information in hydrological processes. To evaluate the controlling factors on stable isotopes of precipitation in the northwesternmost Tibetan Plateau (NWTP), the spatial-temporal variation of delta O-18 and delta H-2 in precipitation was investigated based on 120 event-based precipitation samples collected from 3 stations (Jiangka, Shaman and Xihexiu) during 2011-2014 and 45 monthly average precipitation data of Hetian station (GNIP) and 23 individual precipitation events of Shiquanhe station during 2001. The values of delta O-18 and delta H-2 in precipitation are more positive in the summer (June to July) and negative in the winter (November to March). The seasonal d-excess pattern observed in the NWTP is remarkably different from that in adjacent regions. The local meteoric water line (LMWL) was calculated as delta H-2 = 8.22 delta O-18 + 12.41 (R-2 = 0.98, n = 194) based on the event-based samples. Temperature and altitude effects show significant influence on the precipitation delta O-18 in the study area. Sub-cloud evaporation and recycling moisture also are important controlling factors during the precipitation process. The sub-cloud evaporation decreased d-excess between 1.7% and 45.8%, and the d-excess decreased linearly with increasing sub-cloud evaporation at about 1.15 parts per thousand per 1% change of sub-cloud evaporation. The recycled moisture has an important influence on the precipitation on the Xihexiu, Shaman and Jiangka stations. The result of this study is helpful to the understanding of regional water cycling and optimal water resource management during water shortages.
机译：降水在全球水循环中起着重要作用，稳定的降水氢和氧同位素为水文过程提供了有用的信息。为了评估最西北部青藏高原（NWTP）稳定降水同位素的控制因素，基于从3个台站收集的120个基于事件的降水样本，研究了降水中O-18和H-2的时空变化（江卡，萨满和西合休）2011-2014年和田站（GNIP）的45个月平均降水量数据和2001年石泉河站的23个单独降水事件。降水中O-18和H-2的值更大夏季（6月至7月）为正，冬季（11月至3月）为负。 NWTP中观测到的季节性d-过量模式与邻近地区明显不同。基于基于事件的样本，计算出的局部流水线（LMWL）为德尔塔H-2 = 8.22德尔塔O-18 + 12.41（R-2 = 0.98，n = 194）。温度和高度影响对研究区域的降水三角洲O-18表现出显着影响。在沉淀过程中，亚云蒸发和水分回收也是重要的控制因素。子云蒸发量将d-过量降低了1.7％至45.8％，并且随着子云蒸发量的增加，d-过量量呈线性下降，每1％的子云蒸发量约为1.15千分之几。回收的水分对西和秀站，萨满站和江卡站的降水有重要影响。这项研究的结果有助于了解缺水期间的区域水循环和最佳水资源管理。

著录项

  • 来源
    《Atmospheric research》 |2019年第10期|66-78|共13页
  • 作者

    Sun Congjian; Chen Yaning; Li Jie; Chen Wei; Li Xingong;

  • 作者单位

    Shanxi Normal Univ, Sch Geog Sci, 1 Gongyuan St, Linfen 041000, Shanxi, Peoples R China|Chinese Acad Sci, State Key Lab Desert & Oasis Ecol, Xinjiang Inst Ecol & Geog, Urumqi, Xinjiang, Peoples R China;

    Chinese Acad Sci, State Key Lab Desert & Oasis Ecol, Xinjiang Inst Ecol & Geog, Urumqi, Xinjiang, Peoples R China;

    Beijing Normal Univ, Coll Water Sci, Beijing 100875, Peoples R China;

    Shanxi Normal Univ, Sch Geog Sci, 1 Gongyuan St, Linfen 041000, Shanxi, Peoples R China;

    Shanxi Normal Univ, Sch Geog Sci, 1 Gongyuan St, Linfen 041000, Shanxi, Peoples R China|Univ Kansas, Dept Geog & Atmospher Sci, 1475 Jayhawk Blvd,Room 409, Lawrence, KS 66045 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Stable isotope; Precipitation; Controlling factors; Northwesternmost Tibetan Plateau;

    机译：稳定同位素降水控制因素青藏高原最西北;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号