陕甘宁地区降水稳定同位素特征及水汽来源

doi:10.13287/j.1001-9332.201907.021

应用生态学报 ›› 2019, Vol. 30 ›› Issue (7): 2191-2200.doi: 10.13287/j.1001-9332.201907.021

• 陆地生态系统与农林气象专栏 • 上一篇下一篇

陕甘宁地区降水稳定同位素特征及水汽来源

刘洁遥^1,2, 张福平^1,2*, 冯起^1,3, 魏永芬⁴, 黄良红⁵, 李宗省³, 聂硕^1,2, 李玲^1,2

¹陕西师范大学地理科学与旅游学院, 西安 710119;
² 陕西师范大学地理学国家级实验教学示范中心, 西安 710119;
³中国科学院寒区旱区环境与工程研究所, 兰州 730000;
⁴日本国立岐阜大学流域圈科学研究中心, 岐阜 501-1193;
⁵中国民用航空太原空中交通管理中心, 太原 030031

收稿日期:2018-08-22 出版日期:2019-07-15 发布日期:2019-07-15
通讯作者: * E-mail: zhang_fuping@163.com
作者简介:刘洁遥,女,1993年生,硕士研究生.主要从事生态水文学研究.E-mail:1145335438@qq.com
基金资助:
陕西省自然科学基金面上项目(2018JM4020)、国家重点研发计划项目(2017YFC0404300)、中国科学院前沿科学重点研究项目(QYZDJ-SSW-DQC031)

Stable isotopes characteristics of precipitation over Shaanxi-Gansu-Ningxia and its water vapor sources.

LIU Jie-yao^1,2, ZHANG Fu-ping^1,2*, FENG Qi^1,3, WEI Yong-fen⁴, HUANG Liang-hong⁵, LI Zong-xing³, NIE Shuo^1,2, LI Ling^1,2

¹School of Geography and Tourism, Shaanxi Normal University, Xi’an 710119, China;
²National Demonstration Center for Experimental Geography Education, Shaanxi Normal University, Xi’an 710119, China;
³Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
⁴River Basin Research Center, Gifu University, Gifu 501-1193, Japan;
⁵Taiyuan Air Traffic Management Center, Civil Aviation Administration of China, Taiyuan 030031, China.

Received:2018-08-22 Online:2019-07-15 Published:2019-07-15
Contact: * E-mail: zhang_fuping@163.com

摘要/Abstract

摘要： 依据全球大气降水稳定同位素观测网络(GNIP)和已有研究中陕甘宁地区的大气降水氢氧稳定同位素资料,并结合相关气象数据,分析了陕甘宁地区大气降水氧稳定同位素的时空分布特征及其影响因子,并建立了大气降水线方程.结果表明: 3省大气降水线的斜率、截距由小到大依次为:甘肃、陕西、宁夏,且均小于全球大气降水线方程的斜率、截距,表明3省的降水过程受蒸发作用影响程度沿宁夏、陕西、甘肃增强;陕甘宁地区大气降水中δ¹⁸O值在时间变化上,表现为夏秋季节富集、冬春季节贫化,从空间分布来看,由西北至东南,加权平均δ¹⁸O值呈减小趋势;3省降水中δ¹⁸O温度效应显著,但不存在降水量效应,这体现了中高纬度大陆性气候的特征;高程效应的定量关系为-0.12‰·(100 m)^-1,纬度效应更显著(纬度每增加1°,降水中δ¹⁸O相应贫化0.27‰);采用HYSPLIT模型对各站点的水汽来源进行追踪,气团聚类轨迹表明,夏半年主要有来自孟加拉湾的水汽、东南季风水汽和西风带水汽,冬半年以西风带水汽为主.

Abstract: Based on hydrogen and oxygen stable isotopes in precipitation and meteorological data over Shaanxi-Gansu-Ningxia provided by the Global Network of Isotopes in Precipitation (GNIP) and in previous literature, the spatial and temporal variations of oxygen stable isotopes in precipitation and their driving factors were analyzed, the local meteoric water line (LMWL) functions were established. The results showed that the slope and intercept of the LMWL changed in the order of Gansu<Shaanxi<Ningxia, with all of them being lower than slope and intercept of the Global Meteo-ric Water Line. The precipitation process of three provinces had been evaporated and fractionated to different degrees. The evaporation was enhanced along Ningxia, Shaanxi and Gansu. The δ¹⁸O value in precipitation in the Shaanxi-Gansu-Ningxia region was enriched in summer and autumn but poor in winter and spring. For the spatial distribution, the weighted δ¹⁸O value decreased from the northwest to the southeast. δ¹⁸O in precipitation showed significant temperature effect, but was no precipi-tation effect, reflecting the characteristics of continental climate in the middle and high latitudes. The quantitative relation of elevation effect was -0.12‰·(100 m)^-1, and latitude effect was more significant by -0.27‰ per °. The water vapor source was tracked by HYSPLIT model. The cluster trajectory of air masses showed that water vapor from the Bay of Bengal, southeast monsoon and westerly zone were the main sources in summer half year, while it mainly transported by the westerly belt in winter half year.

刘洁遥, 张福平, 冯起, 魏永芬, 黄良红, 李宗省, 聂硕, 李玲. 陕甘宁地区降水稳定同位素特征及水汽来源[J]. 应用生态学报, 2019, 30(7): 2191-2200.

LIU Jie-yao, ZHANG Fu-ping, FENG Qi, WEI Yong-fen, HUANG Liang-hong, LI Zong-xing, NIE Shuo, LI Ling. Stable isotopes characteristics of precipitation over Shaanxi-Gansu-Ningxia and its water vapor sources.[J]. Chinese Journal of Applied Ecology, 2019, 30(7): 2191-2200.

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陕甘宁地区降水稳定同位素特征及水汽来源

Stable isotopes characteristics of precipitation over Shaanxi-Gansu-Ningxia and its water vapor sources.

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