高原气象

高原气象 >

2014 , Vol. 33 >Issue 4: 937 - 946

DOI: https://doi.org/10.7522/j.issn.1000-0534.2013.00149

论文

WRF模式对夏季黑河流域气温和降水的模拟及检验

  • 许建伟 ,
  • 高艳红
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  • 中国科学院寒区旱区环境与工程研究所 陆面过程与气候变化重点实验室, 兰州 730000;2. 中国科学院大学, 北京 100049

收稿日期: 2012-12-06

  网络出版日期: 2014-08-28

基金资助

国家自然科学基金项目（41322033）；中国科学院百人计划项目（2010CB950503）；国家重点基础研究发展计划（2013CB956004）

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Validation of Summer Surface Air Temperature and Precipitation Simulation over Heihe River Basin

  • XU Jianwei ,
  • GAO Yanhong
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  • Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2012-12-06

  Online published: 2014-08-28

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摘要

利用NCEP/DOE再分析资料驱动中尺度区域模式WRF对1999-2008年夏季（6-8月）黑河流域及周边地区气温和降水进行了模拟，并检验了区域气候模式在山区复杂地形条件下的模拟性能，客观评估了复杂地形条件下气候模拟的性能。气温和降水空间分布的对比分析表明，高分辨率WRF模式较粗分辨率的再分析资料能更精细地模拟出复杂地形条件下山区气温和降水的分布特征，充分体现了高海拔山区复杂地形对气温和降水空间分布的影响。通过BSS指标对气温、降水模拟的定量评估表明，在复杂地形条件下，WRF模式可以在几乎所有观测站点提高气温模拟的准确性，也可以为复杂山区没有观测站点地区气温的空间分布和量值提供数据支持。对降水量模拟的准确性低于气温模拟，半数的站点模拟值较再分析资料更接近观测值，位于祁连山东南侧站点降水量模拟值偏大，可能与WRF模式中地形对水汽输送的抬升作用有关，也可能与观测站点对该区域的代表性有关。

关键词： 区域气候模式; 黑河流域; 复杂地形

本文引用格式

许建伟 , 高艳红 . WRF模式对夏季黑河流域气温和降水的模拟及检验[J]. 高原气象, 2014 , 33(4) : 937 -946 . DOI: 10.7522/j.issn.1000-0534.2013.00149

Abstract

The 10-year simulation (1999-2008) from June to August is conducted using the regional climate model WRFV3.0 driven by the NCEP/DOE reanalysis data. The model results are validated over the Heihe River Baisn and its surroundings. The assessment of advantages and disadvantages are objectively given for reginal climate simulation in the surface air temperature and precipitation over the complex terrain. The results show that, compared to the coarser resolution reanalysis data, the high resolution regional climate simulation more precisely presents the distribution characteristics of the surface air temperature and precipitation in complex terrain area, which shows a dominant impact of complex topography on the spatial distribution of the surface air temperature and precipitation. Quantitative assessments by BSS indicator show an obvious improvement of the surface air temperature simulation at almost all of observation stations, which provides data support for the spatial distribution and quantity of the surface air temperature for complex mountain area with no observations. The improvements in the precipitation simulation is not as high as the surface air temperature, only at half of all stations are closer to the observation than the reanalysis. An overestimation in the precipitation exists in the southestern Qilian Mountain. It might be related to too strong orographic lifting on windward slope in the high resolution or the representation of observation location in a regional grid cell.

Key words： Regional climate mod; Heihe River Basin; Complex terrain

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