年平均风速

年平均风速为4m·s-1,1月风速最大为6.1m·s-1，上午风弱、午后风强；

Mean annual wind speed is 4 m · s-1 , the maximum wind speed occurs in January ( 6.1m · s-1 ), there are strong winds in the afternoon and weak winds in the morning .

近48a的年平均风速呈显著的下降趋势，月平均风速变化趋势呈双峰曲线。

However , the annual average wind speed showed significant decrease trend in the latest 48 years . The trend of the monthly average wind speed appeared a double peaks curve .

年平均风速与城市发展指数的关系模型相关性均较高。

The relationship models between annual mean wind-speed and urbanization are all significant .

芜湖与南京的年平均风速减小幅度较大，安庆次之，南通最小。

The decrease range of annual mean wind-speed is biggest in Wuhu and Nanjing , and that in Nantong is the smallest .

安庆和芜湖的年平均风速随城市发展先下降后上升，但芜湖后阶段上升的趋势不显著。

And that in Anqing and Wuhu are decreasing first , and rising then , but that in Wuhu is rising insignificant in the later period .

南通和南京后阶段的年平均风速随城市发展先增大后减小，变化基本符合库兹涅茨曲线特征。

The trends of annual mean wind-speed with urbanization in Nantong and Nanjing are rising first , and decreasing then , which conform to Kuznets curve .

安西县是世界闻名的风库，年平均风速大于3.5米/秒。

Lat.40 ° - 45 ° . An-xi county , world-famous " wind Storehouse " , possesses an annual averge wind speed greater than 3.5 meter per second .

影响油松树高、胸径生长的主导因子分别为年平均风速和年平均气温。

We also found the factors of affect the height and the speed of chest growth of Pinus tabulaeformis are annual average wind speed and annual average temperature .

可利用某地年平均地面风速（V（10））和数次实测烟囱口高度的风速（V烟），应用对数律或幂指数律推算该地各高度上的风速。

Can be calculated with annual mean surface wind velocity and multi-measurements of wind speed at the height of funnel top .

年最大平均风速的概率信息是风工程领域内的重要数据。

Probabilistic information of yearly maximum average value of the wind velocity ( V | - ) _ ( wind ) is an important element in the field of wind engineering .

根据1951~2000年的日平均风速、气温和降水数据以及1980~2000年的沙尘暴资料，分析东北典型黑土区的风蚀环境。

Based on the average daily wind speed data , average daily air temperature data , daily precipitation data of 1951-2000 , and the daily dust data of 1980-2000 , the wind erosion environment of black soil region in the northeastern China was analyzed .

整个区域自1970年以来，年平均风速在减小，但近40a来浑善达克沙地西部地区沙尘暴一直在发展；

The annual mean wind velocity in the whole region is decreasing since 1970 . But the dust-storm in the west part of this region was existent at all times .

年和四季的平均风速均趋于减小的趋势。

The average wind speed of year and the four seasons presents decreasing tendency .

近46年来东北地区平均风速和大风气候趋势整体上均呈下降趋势。

Nearly 46 years mean wind speed and the trend of strong wind days showed decreasing .

年平均相对湿度随城市发展变化趋势不明显，后期有微弱的上升趋势，年平均风速则随城市化水平不断提高而不断减小，趋势显著，两者变化趋势均不符合库兹涅茨曲线特征。

The trends of annual mean relative-humidity are weakly rising in the later period , and that of annual mean wind-speed are obviously decreasing with the development of the cities , and the two are not conformed to Kuznets curve . 6 .