| GRAPES_Meso区域模式积云计算方案引进及预报效果检验 |
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| 引用本文： | 郑晓辉,徐国强,贾丽红,郑东生,张红军.GRAPES_Meso区域模式积云计算方案引进及预报效果检验[J].大气科学,2016,40(5):907-919. |
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| 作者姓名： | 郑晓辉 徐国强 贾丽红 郑东生 张红军 |
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| 作者单位： | 1.北京师范大学全球变化与地球系统科学研究院, 北京 100875 |
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| 基金项目： | 国家自然科学基金项目41275104、41590874，国家重点基础研究发展计划（973计划）项目2013CB430106，国家十二五科技支撑计划项目2012BAC22B02 |
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| 摘 要： | 云量在模式中的准确模拟既是一个重点问题，也是一个难点问题。经评估发现，在GRAPES_Meso（Global/Regional Assimilation and PrEdiction System）模式中存在模拟云量偏少的问题，而ECMWF模式中的积云云量计算方案对云量模拟具有一定优势。鉴于此，本文借鉴ECMWF积云云量计算方案对GRAPES中尺度模式中的云量计算方案进行了适当改进，并通过影响试验模拟三维云量和地面温度来验证其改进效果。结果表明:较改进前，改进云量方案模拟的云量增多，单层云量更加准确，垂直方向云层结构改进效果明显；地面温度与观测值对比误差减小。综合分析模拟结果，认为改进云量计算方案在GRAPES模式中对云量和地面温度的模拟有较好的改进。
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| 关 键 词： | GRAPES_Meso模式 云量计算方案 三维云量 2m温度 |
| 收稿时间： | 3/7/2015 12:00:00 AM |
Incorporation of a Cumulus Fraction Scheme in the GRAPES_Meso and Evaluation of Its Performance |
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| ZHENG Xiaohui,XU Guoqiang,JIA Lihong,ZHENG Dongsheng and ZHANG Hongjun.Incorporation of a Cumulus Fraction Scheme in the GRAPES_Meso and Evaluation of Its Performance[J].Chinese Journal of Atmospheric Sciences,2016,40(5):907-919. |
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| Authors: | ZHENG Xiaohui XU Guoqiang JIA Lihong ZHENG Dongsheng and ZHANG Hongjun |
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| Institution: | 1.College of Global Change and Earth System Science, Beijing Normal University, Beijing 1008752.Numerical Weather Prediction Center, National Meteorological Center, Beijng 1000813.Meteorological Observatory of Xinjiang Uygur Autonomous Region, Urumqi 8300024.Guyuan Meteorological Bureau, Ningxia, Guyuan 7560005.Laoting County Meteorological Bureau, Tanshan, Hebei, Laoting 063600 |
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| Abstract: | Accurate simulation of cloud cover fraction is a key and difficult issue in numerical modeling studies. Preliminary evaluations have indicated that cloud fraction is generally underestimated in GRAPES_Meso (Global/Regional Assimilation and PrEdiction System) simulations, while the cloud fraction scheme (CFS) of ECMWF can provide more realistic results. Therefore, the ECMWF cumulus fraction scheme is introduced into GRAPES_Meso to replace the original CFS, and the model performance with the new CFS is evaluated based on simulated three-dimensional cloud fractions and surface temperature. Results indicate that the simulated cloud fractions increase and become more accurate with the new CFS; the simulation for vertical cloud structure has improved too; errors in surface temperature simulation have decreased. The above analysis and results suggest that the new CFS has a positive impact on cloud fraction and surface temperature simulation. |
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| Keywords: | GRAPES_Meso Cloud fraction scheme Three dimensional cloud fraction 2-m temperature |
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