Analysis of temporal and spatial characteristics of sea surface wind field in Taiwan Strait based on CCMP
The annual,seasonal,monthly and diurnal variations of sea surface wind field over the Taiwan Strait were analyzed based on the new version of Cross-Calibrated Multi-Platform Version 3.1(CCMP V3.1)wind data from 1993 to 2022.The results showed that the wind field in the Taiwan Strait and the water around Taiwan Island had obvious spatial distribution characteristics,the topographic effect leads to the maximum and minimum wind speed regions in different sea areas.Because the central Taiwan Strait was affected by the"narrow tube effect",the wind speed was the highest and the wind direction was basically parallel to the strait in winter;the wind speed in summer was lower than the speed outside the channel,and there was no"narrow tube effect".In addition,the sea surface wind field also had obvious seasonal and monthly variation characteristics.The northeast wind prevailed in winter,and in this season the wind speed was the highest in the whole year;the southwest wind prevailed in sum-mer with the lowest wind speed;the characteristics of spring and autumn monsoon fields were similar,both prevail-ing northeast wind;winter monsoon last longer than summer monsoon,accounting for about three quarters of the year.The analysis of the inter-annual variation of wind field showed that the wind direction tended to deflect at a large angle in summer.The annual mean wind speed maintained a basically flat linear trend,and the abnormal high or low in some years was related to the occurrence of El Niño-Southern Oscillation(ENSO).When the diurnal vari-ation characteristics were studied,it was found that the wind speed and direction fluctuated most at 20 PM.The wind speed varied periodically within a day.The diurnal variation of wind direction deflection was most obvious in summer.
CCMPTaiwan Straitsea surface wind fieldtemporal and spatial characteristics
NETL
NSTL
万方数据
