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高原气象  2018, Vol. 37 Issue (5): 1143-1160    DOI: 10.7522/j.issn.1000-0534.2018.00020
论文     
基于TIPEX Ⅲ资料对CLDAS-V2.0和GLDAS-NOAH陆面模式产品在青藏高原地区的适用性评估
崔园园1, 敬文琪2, 覃军3
1. 河北省气象台, 河北 石家庄 050000;
2. 94758部队气象台, 福建 宁德 352000;
3. 中国地质大学(武汉)环境学院, 湖北 武汉 430074
Applicability Evaluation of Merged Soil Moisture in GLDAS-NOAH and CLDAS-V2.0 Products over Qinghai-Tibetan Plateau of 2015 Based on TIPEX Ⅲ Observations
CUI Yuanyuan1, JING Wenqi2, QIN Jun3
1. Hebei Province Meteorological Bureau, Shijiazhuang 050000, Hebei, China;
2. Meteorological Observatory of 94758 Troops, Ningde 352000, Fujian, China;
3. School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
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摘要: 利用2015年第三次青藏高原大气科学试验(TIPEX Ⅲ)五层(5,10,20,50和100 cm)土壤的温、湿度观测资料,通过计算全球陆面同化系统(GLDAS-NOAH)和中国气象局陆面同化系统的融合产品(CLDAS-V2.0)与观测资料之间的相关性和偏差,以及分析降水事件发生后两种模式资料土壤温、湿度的响应,综合评估了融合土壤温、湿度产品在青藏高原的适用性。结果表明,CLDAS-V2.0土壤温、湿度产品与观测资料的相关性均优于GLDAS-NOAH模式产品,且两模式产品与站点观测资料的相关性在湿季大于干季,相关性随土壤深度增加而减小;CLDAS-V2.0土壤湿度产品相对站点观测的误差稍大于GLDAS-NOAH,且在浅层土壤两模式产品与站点观测的MRE整体上在干季大于湿季;CLDAS-V2.0土壤温度产品与站点观测的RMSE在湿季大于干季,而GLDAS-NOAH产品则相反;两种模式产品均能描述出降水发生后浅层土壤温、湿度对降水的响应,但两种模式产品所描述的深层土壤温、湿度的波动幅度相对观测明显偏大;此外,两种模式产品无法重现观测到的深层土壤温、湿度相对表层土壤温、湿度变化明显"滞后"的特征以及降水后相对降水前土壤温度峰/谷值对应时间存在明显延迟的特征。
关键词: 青藏高原第三次青藏高原大气科学试验融合土壤温、湿度产品适用性评估    
Abstract: In-situ soil temperature and soil moisture observations at five layers (5 cm, 10 cm, 20 cm, 50 cm and 100 cm) from the 3rd Qinghai-Tibetan Plateau Atmospheric Scientific Experiment (TIPEX Ⅲ) were used to verify the applicability of two land surface model products, i. e. Global Land Data Assimilation System-NCEP, OSU, Air Force and Office of Hydrology (GLDAS-NOAH) and CMA (China Meteorological Administration) Land Data Assimilation System Version 2.0 (CLDAS-V2.0). This paper calculated the correlation coefficient and deviation between the two land model products and the in-situ soil temperature and soil moisture observations in 2015. In addition, this paper also analyzed the response of the soil temperature and soil moisture products from CLDAS-V2.0 and GLDAS-NOAH. From the two aspects, this study comprehensively evaluated the soil temperature and soil moisture' applicability of the two model products over Qinghai-Tibetan Plateau. Through the above analysis, it is discovered that the correlation (both for soil temperature and soil moisture) between the CLDAS-V2.0 and in-situ observations is better than that of GLDAS-NOAH. The correlation between the land model products (both for CLDAS-V2.0 and GLDAS-NOAH) and in-situ observations in wet season is larger than that in dry season, and shows a decreasing trend with soil depth. The deviation of soil moisture between the CLDAS-V2.0 and in-situ observations is slightly larger than that of GLDAS-NOAH. In addition, in shallow soil layers, the mean relative error (MRE) of soil moisture between the model products (both for CLDAS-V2.0 and GLDAS-NOAH) and in-situ observations during dry season is larger than that of the wet season. The root mean square error (RMSE) between CLDAS-V2.0 soil temperature product and in-situ observations in wet season is larger than that of the dry season, while this inclination of RMSE is opposite for GLDAS-NOAH temperature product during the wet and dry season. Both the CLDAS-V2.0 and GLDAS-NOAH model products can relatively accurate grasp that how the soil temperature and soil moisture response to the precipitation in shallow soil layers. However, the two model products show a lager fluctuation in deep soil layers relative to in-situ observations both in soil temperature and soil moisture. At last, the two model products (CLDAS-V2.0 and GLDAS-NOAH) cannot reproduce the significantly "lag" features that the observed soil temperature and soil moisture show a delayed change with the soil depth. And the daily Peak/valley values appear time of the soil temperature and soil moisture will show a "lag" feature after the precipitation happened which the two model products cannot describe it.
Key words: Qinghai-Tibetan Plateau    the 3rd Qinghai-Tibetan Plateau atmospheric scientific experiment    merged soil temperature and moisture product    applicability evaluation
收稿日期: 2017-10-20 出版日期: 2018-10-19
ZTFLH:  P412.1  
基金资助: 公益性行业(气象)科研专项(GYHY201406001);国家重点研发计划项目(2016YFA0602002)
通讯作者: 覃军(1964-),男,湖北武汉人,高级工程师,主要从事气候变化与大气环境研究.E-mail:qinjun@cug.edu.cn     E-mail: qinjun@cug.edu.cn
作者简介: 崔园园(1991-),女,河北石家庄人,助理工程师,主要从事气象资料质量控制研究.E-mail:doubleyuancui@foxmail.com
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引用本文:

崔园园, 敬文琪, 覃军. 基于TIPEX Ⅲ资料对CLDAS-V2.0和GLDAS-NOAH陆面模式产品在青藏高原地区的适用性评估[J]. 高原气象, 2018, 37(5): 1143-1160.

CUI Yuanyuan, JING Wenqi, QIN Jun. Applicability Evaluation of Merged Soil Moisture in GLDAS-NOAH and CLDAS-V2.0 Products over Qinghai-Tibetan Plateau of 2015 Based on TIPEX Ⅲ Observations. Plateau Meteorology, 2018, 37(5): 1143-1160.

链接本文:

http://www.gyqx.ac.cn/CN/10.7522/j.issn.1000-0534.2018.00020        http://www.gyqx.ac.cn/CN/Y2018/V37/I5/1143

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