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基于大气环流模式(GCM)的黄土高原区降水稳定同位素模拟分析比较

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周鑫, 陈粉丽, 刘雪媛, 钱瑞, 王生晖, 武茜茜. 基于大气环流模式(GCM)的黄土高原区降水稳定同位素模拟分析比较[J]. 环境化学, 2021, (4): 1179-1186. doi: 10.7524/j.issn.0254-6108.2019110701
引用本文: 周鑫, 陈粉丽, 刘雪媛, 钱瑞, 王生晖, 武茜茜. 基于大气环流模式(GCM)的黄土高原区降水稳定同位素模拟分析比较[J]. 环境化学, 2021, (4): 1179-1186. doi: 10.7524/j.issn.0254-6108.2019110701
shu
ZHOU Xin, CHEN Fenli, LIU Xueyuan, QIAN Rui, WANG Shenghui, WU Xixi. Analysis and comparison of simulated stable isotopes of precipitation in the Loess Plateau based on GCMs[J]. Environmental Chemistry, 2021, (4): 1179-1186. doi: 10.7524/j.issn.0254-6108.2019110701
Citation: ZHOU Xin, CHEN Fenli, LIU Xueyuan, QIAN Rui, WANG Shenghui, WU Xixi. Analysis and comparison of simulated stable isotopes of precipitation in the Loess Plateau based on GCMs[J]. Environmental Chemistry, 2021, (4): 1179-1186. doi: 10.7524/j.issn.0254-6108.2019110701
shu

基于大气环流模式(GCM)的黄土高原区降水稳定同位素模拟分析比较

  • 西北师范大学地理与环境科学学院, 兰州, 730070

    • 通讯作者: 陈粉丽, E-mail: chenfenli1102@163.com ; 
  • 基金项目:

    甘肃省高等学校协同创新团队项目（2018C-02）资助.

Analysis and comparison of simulated stable isotopes of precipitation in the Loess Plateau based on GCMs

  • College of Geography and Environmental Sciences, Northwest Normal University, Lanzhou, 730070, China

    • Corresponding author: CHEN Fenli, chenfenli1102@163.com ; 
  • Fund Project: Supported by Collaborative Innovation Team Project in Colleges and Universities of Gansu(2018C-02).

摘要

  • 摘要: 降水中的稳定同位素作为研究水循环中的重要组成部分，可综合反映出自然地理环境及气候变化.本文依据1980-2007年第二次稳定水同位素比较小组SWING2中的5种大气环流模式（GCM）与全球降水同位素观测信息网（GNIP）实测数据，分析比较了黄土高原区降水稳定同位素的季节性时空特征变化.研究结果表明，由LMDZ（free）模拟的当地大气水线δD=7.448×δ18O+3.608更接近于实测结果，而MIROC模拟的LMWL相关系数R2高达0.999；5种GCM模拟中的δ18O与δD均表现出明显的季节变化，即夏季大于冬季.d值结果再次验证了该区域夏季具有高湿度、蒸发慢、低d值，而冬季具有湿度低、蒸发快、高d值的特点.在纬度效应分析中，高纬度较低纬度中的δ18O值明显偏低.
    Abstract: As an important part in the study of water cycle, stable isotopes in precipitation can comprehensively reflect the natural geographical environment and climate change. Based on the simulations of five isotope-equipped GCMs released by Stable Water Isotope Intercomparison Group (SWING2) and measured data of GNIP from 1980-2007,the spatial distribution and seasonal variation of stable isotopes in precipitation are analyzed and compared in Loess Plateau. Research indicated that local meteoric water line (LMWL) (δD=7.448×δ18O+3.608) simulated by LMDZ(free) is closer to that of measured data,that correlation coefficient (R2) between LMWL simulated by MIROC and measured data of GNIP is 0.999, and that the values of δ18O and δD in precipitation for the five models in summer are higher than those in winter. Compared to winter, humidity and d-excess are high while evaporation is slow in summer. What's more, the value of δ18O is much lower in high latitudes.
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  • 收稿日期:  2019-11-07
周鑫, 陈粉丽, 刘雪媛, 钱瑞, 王生晖, 武茜茜. 基于大气环流模式(GCM)的黄土高原区降水稳定同位素模拟分析比较[J]. 环境化学, 2021, (4): 1179-1186. doi: 10.7524/j.issn.0254-6108.2019110701
引用本文: 周鑫, 陈粉丽, 刘雪媛, 钱瑞, 王生晖, 武茜茜. 基于大气环流模式(GCM)的黄土高原区降水稳定同位素模拟分析比较[J]. 环境化学, 2021, (4): 1179-1186. doi: 10.7524/j.issn.0254-6108.2019110701
shu
ZHOU Xin, CHEN Fenli, LIU Xueyuan, QIAN Rui, WANG Shenghui, WU Xixi. Analysis and comparison of simulated stable isotopes of precipitation in the Loess Plateau based on GCMs[J]. Environmental Chemistry, 2021, (4): 1179-1186. doi: 10.7524/j.issn.0254-6108.2019110701
Citation: ZHOU Xin, CHEN Fenli, LIU Xueyuan, QIAN Rui, WANG Shenghui, WU Xixi. Analysis and comparison of simulated stable isotopes of precipitation in the Loess Plateau based on GCMs[J]. Environmental Chemistry, 2021, (4): 1179-1186. doi: 10.7524/j.issn.0254-6108.2019110701
shu

基于大气环流模式(GCM)的黄土高原区降水稳定同位素模拟分析比较

    通讯作者: 陈粉丽, E-mail: chenfenli1102@163.com ; 
  • 西北师范大学地理与环境科学学院, 兰州, 730070
  • 收稿日期:  2019-11-07
基金项目:

甘肃省高等学校协同创新团队项目（2018C-02）资助.

摘要: 降水中的稳定同位素作为研究水循环中的重要组成部分，可综合反映出自然地理环境及气候变化.本文依据1980-2007年第二次稳定水同位素比较小组SWING2中的5种大气环流模式（GCM）与全球降水同位素观测信息网（GNIP）实测数据，分析比较了黄土高原区降水稳定同位素的季节性时空特征变化.研究结果表明，由LMDZ（free）模拟的当地大气水线δD=7.448×δ18O+3.608更接近于实测结果，而MIROC模拟的LMWL相关系数R2高达0.999；5种GCM模拟中的δ18O与δD均表现出明显的季节变化，即夏季大于冬季.d值结果再次验证了该区域夏季具有高湿度、蒸发慢、低d值，而冬季具有湿度低、蒸发快、高d值的特点.在纬度效应分析中，高纬度较低纬度中的δ18O值明显偏低.

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