doi:  10.3878/j.issn.1006-9895.1812.18105
GRAPES-TCM台风模式的新涡旋初始化方案——原理和实施

Vortex Initialization Scheme in GRAPES-TCM Model:
摘要点击 266  全文点击 185  投稿时间:2018-01-14  
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基金:  公益性行业 气象 2012BAC21B02上海市科学技术委员会科研计划项目17DZ1205300,上海市国际科技合作基金项目科研计划项目17230741300,公益性行业(气象)科研专项项目GYHY201206006,国家科技支撑计划项目2012BAC21B02
中文关键词:  涡旋初始化  热带气旋  GRAPES模式
英文关键词:  Vortex initialization  Tropical cyclone  GRAPES model
           
作者中文名作者英文名单位
许晓林上海市生态气象和卫星遥感中心,上海 200030
LIUQingfu
陈葆德中国气象局上海台风研究所,上海 200030
王晓峰上海市生态气象和卫星遥感中心,上海 200030
引用:许晓林,LIUQingfu,陈葆德,王晓峰.2019.GRAPES-TCM台风模式的新涡旋初始化方案——原理和实施[J].大气科学,43(5):975-989,doi:10.3878/j.issn.1006-9895.1812.18105.
Citation:.2019.Vortex Initialization Scheme in GRAPES-TCM Model:[J].Chinese Journal of Atmospheric Sciences (in Chinese),43(5):975-989,doi:10.3878/j.issn.1006-9895.1812.18105.
中文摘要:
      在更新的GRAPES-TCM (Global/Regional Assimilation and Prediction System-Tropical Cyclone Model)台风模式架构下,引进与发展了一个新的涡旋初始化方案。该方案对台风涡旋进行极小化订正,减少了人为因素对台风涡旋结构的影响,所产生的涡旋满足特定的动力与热力平衡,且保持了与模式动力及热力的一致性。新的涡旋初始化方案能更精细地体现初始台风的强度与结构,强度更接近于观测,结构更为合理。试验表明其可以有效地改善台风路径与强度的预报精度。
Abstract:
      A vortex initialization scheme has been developed and implemented in a newly updated version of GRAPES-TCM (Global/Regional Assimilation and Prediction System-Tropical Cyclone Model) by following the principle of HWRF (Hurricane Weather Research and Forecasting Model), in which correction for the vortex is as small as possible. The new scheme applies a small correction in the storm vortex to maintain a certain consistency with the model. Arbitrariness in the modification of the vortex is largely reduced, and the resultant vortex holds related dynamical and thermodynamical balance. Results indicate that the initial vortex from the new scheme possesses an intensity that is considerably closer to the observed intensity and increased structural detail. Hindcast shows that the new vortex scheme can effectively improve the accuracy of typhoon tracking and intensity forecasting.
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