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本文利用1956—1982年北半球100毫巴和500毫巴月平均高度资料,计算分析了我国夏季降水与前期9月到同期8月二层高度场的相关关系,对比对流层中层和高层平均环流形势与我国天气的关系。分析表明,100毫巴和500毫巴月平均高度场与我国夏季降水的相关关系,在时空分布上有着基本的共同性,同时又有各自不同的相关特点。这些分析结果,在长期天气预报工作中有一定的参考作用。 相似文献
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本文分析500百帕月平均西太平洋副热带高压强度和位置变化与北太平洋和赤道海温之间的相互关系。结果表明,海温对西太平洋副高的影响比较明显,而副高对海温的影响不如海温对副高影响那样显著。海温与副高的相关关系有着明显的季节差异和区域差异,其中冬季赤道低纬地区的海温与冬、春季副高强度变化之间的关系最为突出。 相似文献
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1997年中国夏季旱涝和北半球平流层平均环流分析 总被引：5，自引：1，他引：4
通过分析对应我国夏季三类降水型的北半球50 hPa平均环流场特征,表明1997年我国夏季降水异常的50 hPa环流特征,主要是从冬到夏大范围高度场偏高,极地涡旋冬季弱春季强,太平洋高压冬春异常加强。 相似文献
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1998年长江流域降水致洪的评估 总被引：6，自引：2，他引：4
通过１９５１年以来长江流域１０个大水年的降水量手对比,对１９９８年长江流域降水致洪进行了评估。结果表明,１９９８年长江大水与１９５４年一样,是一次全流域性的大水年,降水总量接近１９５４年,强于其它大水库。 相似文献
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艾 《热带气象学报(英文版)》2000,6(2):186-193
Most of the study on correlation between the subtropical high and SST focus on the location or intensity of the former versus the latter. It is worthwhile to work on links other than what is usually addressed to identify guidelines in the prediction of the subtropical high. Based on the analysis of subtropical high in west Pacific summer and its correlation with SST in equatorial and north Pacific from previous December to subsequent November, correlation between the area index, west-extending point, location of the subtropical high ridge and SST is discussed. It is conducted by looking into the confidence level of gridpoints and their percentage in the total and examining how they vary with time. From the point of intensity and movement/expansion, feedbacks from the subtropical high to SST are also studied. The SST affects the subtropical high just as the subtropical high affects the SST. A linkage model is thus set up to assist the making of summer rainfall prediction in China's raining seasons. 相似文献
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年代际气候变化与1998年长江大水 总被引：11，自引：2，他引：9
由于海温、高原积雪和大气环流异常等特定条件,引发了１９９８年夏季长江的特大洪涝,而９０年代的气候特征也对１９９８年长江大水起到一定的作用。从中国夏季降水、大气环流、冬季高原积雪和海温等方面分析年代际气候变化对１９９８年长江大水提供有利的气候环境。 相似文献
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Based on data of typhoon over the West Pacific and the South China Sea for the last 40 years, theshort-term climate oscillation of typhoon activities was revealed. The result indicated that the climaticvariation of typhoon activities has a tendency of climatic jump in changes in early 1970's. It showed thatbefore the jump of change the number of typhoon was increased and the intensity of typhoon was intensified after which the tendency of variation went contrary. In addition, the increase of typhoon numberduring recent years suggested again the jump of climatic change in the late 1980's, but the intensity oftyphoon did not have the same change. The analysis indicated that the short-term climatic oscillation andthe jump of climatic change have certain physical background. Such climate change tendency of typhoonwas shown to be related to the climatic oscillation of general circulation and SST, especially to the WestPacific subtropical high. 相似文献
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我国年、季降水的年代际变化分析 总被引：21，自引：2，他引：21
通过对我国年、季降水的年代平均距平百分率图的对比分析，计算10年滑动平均距平场相关系数和年代之间平均距平差值t统计量的统计检验。结果表明，我国年、季降水具有较明显的年代际变化趋势。这些结果对于降水的年代气候预测和短期气候预测都具有重要意义。 相似文献