Wind Field Climatology, Changes, and Extremes in the Chukchi–Beaufort Seas and Alaska North Slope during 1979–2009
Wind Field Climatology, Changes, and Extremes in the Chukchi–Beaufort Seas and Alaska North Slope during 1979–2009
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1979-2009 年楚科奇-波弗特海和阿拉斯加北坡的风场气候学、变化和极端事件
DOI：
10.1175/jcli-d-11-00532.1
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发表时间：
2012
影响因子：
4.9
通讯作者：
Jing Zhang
中科院分区：
文献类型：
--
作者：
S. T. Stegall;Jing Zhang
Abstract风场气候学，变化和极端在32公里分辨率的楚科奇波弗特海和阿拉斯加北坡地区进行了分析，使用3小时北美区域再分析（NARR）从1979年到2009年。月平均风速显示出明显的季节性周期，5月最小为2-4 m s-1，10月最大可达9 m s-1。第95百分位数的风显示出类似的季节性，最大值在10月达到15 m s−1。31年的域平均3小时风速显示出一个明确的日周期在陆地和海冰地区在温暖的季节。冬季较弱的辐射和开阔水面较大的热容降低了风场日变化的日信号。7月至11月的区域平均月平均风速和95百分位风速有增加的趋势。区域平均风速的最大增幅出现在10月，从1979年的7 m s-1增加到2009年的10.5 m s-1。极端风事件的频率（速度）
AbstractWind field climatology, changes, and extremes at ~32-km resolution were analyzed for the Chukchi–Beaufort Seas and Alaska North Slope region using 3-hourly North American Regional Reanalysis (NARR) from 1979 to 2009. The monthly average wind speeds show a clear seasonal cycle with a minimum of 2–4 m s−1 in May and a maximum up to 9 m s−1 in October. The 95th percentile winds show a similar seasonality with a maximum up to 15 m s−1 in October. The 31-yr domain averaged 3-hourly wind speeds display a clear diurnal cycle over land and sea ice areas during the warm seasons. Weaker radiation during winter and larger heat capacity over open water reduce the diurnal signal in the wind field diurnal variations. There were increasing trends of areal averaged monthly mean and 95th percentile wind speeds for July through November. The strongest increase in the areal averaged 95th percentile wind speeds occurred in October from 7 m s−1 in 1979 to 10.5 m s−1 in 2009. The frequency of extreme wind events (speed...