青藏高原微地形对极值风速的影响及其参数化模拟方法研究

利用青藏高原铁路沿线1961-2006年7个气象台站和2003年9月-2004年9月7个野外观测点风资料, 结合地理信息系统分析了青藏高原腹地微地形对极值风速的影响. 通过地形因子的参数化处理, 建立了极值风速随海拔和地形参数变化的拟合模型以精确推算复杂地形的极值风速, 并利用临时观测点风资料对其进行了检验. 结果表明, 利用地理信息系统和地形参数化处理方法研究青藏高原微地形对极值风速的影响具有可操作性.

The Impact of Micro-Topography on the Extreme Wind Speed in the Tibetan Plateau and Its Parameterization Stimulation Method

Based on the wind data from seven meteorological stations during 1961-2006 and seven field observing sites from September, 2003 to September, 2004 along the Qinghai-Tibet railway, the impact of hinterland micro-topography of the Tibetan Plateau on the extreme wind speed is analyzed by combining with geographic information system. Through parameterization processing of the topographic factors, a fitting model of extreme wind speed is established, which varies with altitude and geographic factors, and then the extreme wind speed for complicated geography can be calculated precisely. Wind data of temporary observing sites are used to verify. The result shows that it is of a certain maneuverability to study the micro-topography by using geographic information system and topographic parameterization processing and then reveal its impact on the extreme wind speed on the Tibetan Plateau.