长江口外海区冷空气大风的初步分析

COLD AIR AND WIND ANALYSIS IN OFFSHORE WATERS OF THE CHANG JIANG ESTUARY

近几年来,随着海洋石油开采的迅速发展,海上大风对石油钻井平台拖航、插桩和作业的影响已引起人们的普遍关注。为确保石油钻井平台的安全,必须做好海上大风预报。本文据勘探2号平台1980年11月10日至1981年4月27日在长江口外海区5个月的观测资料,对该期间由于冷空气影响,而产生的33次大风过程进行了初步分析;概括了其天气形势的演变特点,单站曲线的变化特征;讨论了气压梯度、锋区强度和湍流交换对风力的影响。本文可供有关部门研究远海冷空气大风和作海上大风预报时参考。

According to the observations of offshore oil drilling platform Kantan No.2 which operated from Nov.1980 to Apr.1981,this paper analyses the physical factors concerning with the cold air and wind pressure gradient,high sky peak area and turbulence exchanging etc.in offshore waters of the Chang Jiang estuary.Different types of cold air and wind perform different functions in degree and duration for offshore waters of the Chang Jiang estuary.The variations of single station curve provide important information for wind forecasting on sea.