本文關(guān)鍵詞： 大風(fēng) 模糊聚類 逐步回歸 浮標(biāo)站 ASCAT 風(fēng)速訂正　出處：《氣象》2016年05期 　論文類型：期刊論文

【摘要】：利用2010—2014年12月至次年2月浙江省自動氣象站測風(fēng)資料和ASCAT散射計反演的風(fēng)場資料,通過模糊聚類空間分型,選取有代表性的站點建立浙江近海冷空氣大風(fēng)的風(fēng)速推算公式,并對ASCAT近海風(fēng)場產(chǎn)品進(jìn)行誤差分析和風(fēng)速訂正。結(jié)果表明:冷空氣影響時浙江北部近海多數(shù)自動站與舟山浮標(biāo)站相比有偏南風(fēng)矢量差,南部近海自動站比溫州浮標(biāo)站有東南風(fēng)矢量差,自動站風(fēng)速一般小于浮標(biāo)站。海拔高度與自動站和浮標(biāo)站風(fēng)速差值δ相關(guān)性不顯著,站點離岸距離是影響δ的主要因子。冷空氣影響時浙江近海ASCAT反演風(fēng)速與實況相關(guān)系數(shù)的分布具有平行于海岸線且自西向東增大的特征,相關(guān)系數(shù)超過0.5的站點一般離岸30 km以上,舟山和溫州12個浮標(biāo)站測風(fēng)與ASCAT反演風(fēng)具有較好的相關(guān)性。浙江近海ASCAT風(fēng)速的誤差空間差異較大,經(jīng)訂正后的風(fēng)速分布也具有平行于海岸線、自西向東逐漸增大的特征,且與觀測的誤差絕對值一般小于2 m·s~(-1)。
[Abstract]:Based on the wind data of Zhejiang automatic weather station from December to February of 2010-2014 and the wind field data retrieved by ASCAT scatterometer, the wind velocity calculation formula of cold air gale in Zhejiang coastal waters is established by fuzzy clustering spatial classification. The error analysis and wind speed correction of ASCAT offshore wind field products are also carried out. The results show that most of the offshore automatic stations in the northern part of Zhejiang Province are different from the Zhoushan buoy station in the south wind vector under the influence of cold air. Compared with Wenzhou buoy station, the southern offshore automatic station has the difference of southeast wind vector, and the wind speed of automatic station is generally smaller than that of buoy station. There is no significant correlation between altitude and air speed difference 未 between automatic station and buoy station. Offshore distance is the main factor affecting 未. The distribution of wind speed inversion wind speed and actual correlation coefficient of ASCAT inversion in Zhejiang coastal waters is parallel to the coastline and increases from west to east. When the correlation coefficient is more than 0.5, the wind measurement of 12 buoy stations in Zhoushan and Wenzhou has a good correlation with the ASCAT inversion wind, and the error of ASCAT wind speed in Zhejiang coastal waters is quite different, and the correlation coefficient is more than 30 km offshore. The revised wind speed distribution is also parallel to the coastline and gradually increases from west to east, and the absolute value of the observed error is generally less than 2 m 路s-1 ~ (-1).
【作者單位】： 浙江省寧波市氣象臺;寧波大學(xué)寧波市非線性海洋和大氣災(zāi)害系統(tǒng)協(xié)同創(chuàng)新中心;浙江省奉化市氣象局;
【基金】：浙江省自然科學(xué)基金(LY15D050001) 寧波市科技計劃項目(2012C50044) 寧波市氣象局科技計劃項目(NBQX2014005B)共同資助
【分類號】：P714.2

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