2016年苏北近海风场和波浪场多时间尺度变化的数值模拟研究  

Numerical Simulation of Multi-scale Temporal Variations of Sea Surface Wind and Wave Field in the Offshore Area of the Northern Jiangsu Province

作　　者：徐瑾 曹玉晗 杨永增 董昌明 王锦 朱伟军[1] XU Jin;CAO Yu-han;YANG Yong-zeng;DONG Chang-ming;WANG Jin;ZHU Wei-jun(Key Laboratory of Meteorological Disasters,Ministry of Education,Nanjing 210044,China;School of Marine Science,Nanjing University of Information Science&Technology,Nanjing 210044,China;First Institute of Oceanography,MNR,Qingdao 266061,China)

机构地区：[1]气象灾害教育部重点实验室,江苏南京210044 [2]南京信息工程大学海洋科学学院,江苏南京210044 [3]自然资源部第一海洋研究所,山东青岛266061

出　　处：《海洋科学进展》2020年第4期600-623,共24页Advances in Marine Science

基　　金：国家重点研发计划“全球变化及应对”重点专项——高分辨率海洋模式关键物理过程参数化方案的研发(2017YFA0604100);国家全球变化与海气相互作用专项——印-太海洋环境变异与海气相互作用项目(GASI-03-IPOVAI—05);大洋“十三五”环境资源类项目——西太海山区物理海洋环境及典型海山流场结构(DY135-E2-2-02)和西太平洋上层海洋环流变异鱼海气相互作用过程(DY135-E2-3-01);江苏省研究生科研与实践创新计划项目——基于SWAN模型的江苏近海风浪时空变化特征研究(SJKY19_0950)。

摘　　要：利用高分辨率的大气和波浪数值模式,模拟了2016年苏北近海的风场和波浪场,并与卫星高度计资料、散射计风场、再分析资料以及实测浮标资料进行了比较,验证了模式的准确性。基于这套模式结果,系统地分析了江苏近海的风场和波浪场的多时间尺度变化:季节变化、日变化以及季节内变化(台风、寒潮)。分析结果表明:苏北近海海域的风速、有效波高和涌浪在冬季和秋季较大、春季和夏季较小;冬季盛行西北风,常浪向为西北向,夏季盛行东南风,常浪向为东南向。风场和波浪场还具有显著的日变化特征,且日变化存在季节变化规律,离岸越近海域日变化特征越明显。同时,江苏近海还会经历季节内尺度的强天气过程的影响,比如台风和寒潮。The sea surface wind and wave fields in the offshore area of the northern Jiangsu Province in the year 2016 are simulated with high-resolution atmospheric and wave numerical models and compared with observations including satellite altimetry data,scattermeter wind data,reanalysis products and in-situ buoy data.The results show that the multi-scale temporal variations exist in sea surface wind and wave fields,such as seasonal,diurnal and intra-seasonal scales.Analysis shows that the sea surface wind,significant wave height and swell are larger in winter and fall than in spring and summer,and northwestern(southeastern)wind and wave prevail in winter(summer).It is found that significant diurnal variation exist in the wind and wave fields and exhibit seasonality.The diurnal variation is stronger in nearshore areas than offshore areas.It is also found that the offshore area of Jiangsu Province may subject to the impacts of strong synoptic processes,such as cold waves and tropical cyclones.

关 键 词：苏北近海 风场 波浪场 多时间尺度变化 

分 类 号：P731[天文地球—海洋科学]