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渤海和北黄海的冰情随着历年冬季气候差异而不同 .暖冬海冰覆盖范围不足海域的 1 5% ,而寒冬可覆盖海域 80 %以上 .概述了海冰监测及资料来源 .冰覆盖面积、外缘线位置和冰况等级等被作为反映结冰海域冰情的指标 .用大连和营口站的气温表示渤海、北黄海海域的局地气候 .用 1 952～ 2 0 0 0年大连的月平均气温描述冰情的变化 .给出冰情指数由 1 952 / 1 953年到 1 999/ 2 0 0 0年随大连站月平均气温变化 .影响渤海和北黄海冰情和气候的因子很多 ,诸如大气环流的演变和太阳活动等 .分析了多种因子与冰情的滞后相关 ,指出 2 0世纪 90年代渤海冰情持续偏轻与全球气候变暖趋势相当一致 ;渤海和北黄海冰情的年际变化与El-Nino现象以及太阳活动周期有关 ;讨论了海冰季节演变的特征
The ice conditions in the Bohai Sea and the northern Yellow Sea differ with the winter climatic variability over the years, with warm wintry sea ice covering less than 15% of the sea area and cold winters covering more than 80% of the sea area.The sea ice monitoring and data sources are summarized.The ice cover, The location of outer rim and grade of ice are used as an index to reflect ices in icing sea area.The temperature in Dalian and Yingkou is used to indicate the local climate in Bohai Sea and northern Yellow Sea.Using the month of Dalian from 1952 to 2000 The average temperature describes the change in ice conditions.The ice temperature index is given from January 952 to January 999/2000 along with the monthly average temperature in Dalian Station There are many factors affecting the ice conditions and climates in the Bohai Sea and North Yellow Sea such as The evolution of the atmospheric circulation and the solar activity etc .. It is analyzed that a variety of factors are correlated with the lag of ice conditions, pointing out that the Bohai Sea ice conditions continued to be light in the 1990s and the trend of global warming is quite consistent. The ice age of the Bohai Sea and the North Yellow Sea The changes are related to the El-Nino phenomenon and the solar activity cycle. The characteristics of sea ice season evolution are discussed