台湾海峡海面风场的季节性变化特征分析

Abstract

利用2016年台湾海峡海域ASCAT卫星逐日、月平均的数据，对台湾海峡海面风场的季节性变化特征和空间格局进行分析。研究发现2016年台湾海峡海域全年出现频率最高风速为5~6 m/s，风场呈现明显的季节性变化，6月平均风速最小，12月风速最大，全年风速呈先递减后增加的趋势。受台湾岛地形影响，台湾海峡冬季海面风场呈明显的“狭谷效应”，海峡海域风速最大，逐渐向南北两侧递减，南部外海海域风速比北部海域来的高。 Based on the daily and monthly data of the ASCAT satellite in the Taiwan Strait in 2016, the seasonal variation characteristics and spatial pattern of the sea wind field in the Taiwan Strait were analyzed. The results revealed that the highest frequency of wind speed in the Taiwan Strait were 5 - 6 m/s in the whole year of 2016, the wind field showed obvious seasonal change, the average monthly wind speed was the smallest in June, on the contrary, the wind speed was the largest in December. Moreover, the wind speed decreased from January to June, and increased from June to December through the whole year. Affected by the terrain of Taiwan island, the wind fields of the Taiwan Strait had a significant “narrow valley effect” in the winter, and the wind speed in the narrow sea area was the largest, and the wind speed in the southern part of the sea was higher than that in the northern sea.