热带气象学报2011，Vol.27Issue(1)：95-100,6.DOI:10.3969/j.issn.1004-4965.2011.01.011
琼州海峡大风数值模拟及地形敏感性试验
NUMERICAL SIMULATION AND TERRAIN SENSITIVITY EXPERIMENT ON GALE WINDS AT QIONGZHOU STRAIT
摘要
Abstract
Gale winds at Qiongzhou Strait caused by three cold air process on December 4 and 21, 2008 and March 13, 2009 were simulated using the Weather and Research Forecast (WRF) model. The results indicated that simulated surface wind field at 4 km grid intervals was close to ground truth. The WRF model showed relatively strong capability of forecasting the initial time and duration of wind, wind speed, and others, and captured different characteristics of the distribution of cold air passages through Qiongzhou Strait via eastern and western routes. A terrain-sensitivity experiment showed that terrain effect attributable to the north and south shores of the strait caused surface wind speed to increase rapidly, due to what is known as the "narrow-channel effect" during the initial time of northeasterly gales; the increase was in a range of 0.5～1.4 m/s in the middle of the strait. The "narrow-channel effect" mainly occurred during the first 6 h of the strong winds; the wind speed began to increase from the start of the enhancing time and generally became the strongest after 3 h and subsequently decreased.关键词
天气预报/数值模拟/试验/大风/琼州海峡/地形Key words
weather forecast/ numerical simulation/ experiments/ gale winds/ Qiongzhou Strait/ terrain分类
天文与地球科学引用本文复制引用
杨仁勇,冯文,许向春,辛吉武..琼州海峡大风数值模拟及地形敏感性试验[J].热带气象学报,2011,27(1):95-100,6.基金项目
国家自然科学基金课题"琼州海峡大风规律及预报方法研究"(40765002) （40765002）
海南省重点科技项目(070302) （070302）
广州区域气象中心项目(GRMC2007Z01)共同资助 （GRMC2007Z01）
