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为分析洞庭湖出流丰枯变化与全球海温变异的关系,基于1961~2012年洞庭湖逐月出流资料,分析洞庭湖出流特征,并由此求解与COBE-SST全球逐月海温资料的相关性。结果表明,洞庭湖出流有缓慢减少的趋势,且在不同时间尺度上存在明显的丰枯交替情况;洞庭湖出流量与海温的相关关系显著,枯季尤为明显,最高相关系数达0.7;出流异常年的海温变异特征与我国气候影响因子息息相关,当西太平洋海温较低时,洞庭湖1月出流较多,反之较少;7月出流异常较多的年份北太平洋温度较高,而出流异常较少的年份东太平洋海温较高。
In order to analyze the relationship between the change of abundance and the global SST variation in Dongting Lake, and based on the monthly flow-out data of Dongting Lake from 1961 to 2012, the characteristics of Dongting Lake outflow were analyzed. The global monthly sea surface temperature of COBE-SST Relevance of the data. The results show that the outflow of Dongting Lake tends to decrease slowly, and there is a clear alternation of abundance and abundance on different time scales. The correlation between the outflow of Dongting Lake and SST is significant, especially in dry season, with the highest correlation coefficient reaching 0.7. The characteristics of SST variation in years of anomalous outflow are closely related to climate factors in China. When the SST in the western Pacific is low, there are more outflows in January and less in the contrary, The higher the East Pacific SST is in the years with less anomalous outflows.