摘要
利用加密自动站资料、NCEP/NCAR 1°×1°再分析资料、海表温度(SST)资料和常规观测资料等气象资料,对2009年5月31日—6月13日和2012年5月18—28日发生在渤海西部海域的2场相似气象因子影响下的典型高影响赤潮过程进行了对比分析。初步结果表明:(1)2场高影响赤潮过程都发生在春末夏初的赤潮高发期,持续时间在10天以上;(2)赤潮爆发前期,伴随有暖湿气流影响形成适度降水,渤海西部的周平均海表温度(SST)升温明显,且SST≥16.2℃,赤潮发生海域为SST的暖脊控制,对赤潮过程的潜势预报有明显的指示意义;(3)850 h Pa以下层次的温度迅速上升,近地层西南暖湿气流的加强和地面6 m/s以下偏南、东南气流在渤海西部海域的汇合,利于渤海西部海洋浮游生物积聚和突发性繁殖,是赤潮形成的重要气象因子特征。
Based on automatic weather station data, NCEP/NCAR 1° × 1° analysis data, weekly mean of sea surface temperature and the conventional observations, the two red tide processes under the similar meteorological conditions which occurred in western Bo Hai Bay were diagnostically analyzed. The results shows that：（1）The two high impact red tide processes both occur in the period of late spring and early summer which is the red tide high-incidence season, and more than ten days in duration.（2） For the early stage of red tide outbreak, the influence of warm and wet air current forms moderate rainfall. The weekly mean of sea surface temperature is obviously rising in western Bo Hai Bay, and the SST is more than 16.2 ℃. The bay of red tide occurrence is controlled by the SST warm ridge, which shows a significant indication for the potential forecast of red tide process.（3） Rapidly increasing temperature below 850 h Pa level, the enhancement of southwestern warm and wet air current on ground layer and the obvious convergence of south wind and southeast wind which are less than 6 m/s in western Bo Hai Bay, are beneficial to the marine plankton accumulation and the sudden reproduction in western Bo Hai Bay, which are the important meteorological factors for the red tide formation.
出处
《海洋预报》
2015年第1期63-69,共7页
Marine Forecasts
基金
公益性行业(气象)科研专项(GYHY201106006)
河北省气象局科研开发重点项目(12ky01)
关键词
渤海西部
赤潮过程
气象因子
诊断分析
western BoHai Bay
Red Tide process
meteorological factors
diagnostic analysis
