江苏省50a近地面风速及气温的时空分布特征分析

利用江苏省12个气象站1960-2010年逐日风速、气温等资料，对12个站点资料进行分类，采用常规的统计方法分析江苏地区50a近地面风速的时空分布以及月循环、季节循环、年内、年际、年代际等变化规律。结果表明：近50a来风速呈下降的趋势；沿海站的风速大于内陆站的风速，但是其下降速率小；乡村站的平均风速比城市站高出0．4m／s左右，下降速率也略大；夏季海陆站、城乡站的风速差较小，冬季较大；强风天数的变化与平均风速的变化类似。

Spatial and temporal characteristics of surface wind speed in the last 50 years over Jiangsu Province

By means of daily data such as wind speed and temperature in 12 weather stations over Jiangsu Province from 1960 to 2010, the observation data in these stations are classified. The temporal and spatial distribution of the wind speed and its monthly cycle, seasonal cycle, inter-annual, inter- decadal variations in the last 50 years have been analyzed by using the regular statistic methods. The results show that the wind speed presents a declined tendency in the recent 50 years. The wind speed collected in coastal stations are higher than that in inland stations with a gentle descent, while the average wind speed in rural stations are about 0.4m/s faster than that in urban stations with a rough descent. There is a little difference in wind speeds obtained by coastal stations and urban stations in summer, comparing with that in winter. The variation of strong windy days and average wind speed are quite similar.