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首页> 外文会议>Sino-German Workshop on Climate Change and Yangtze Floods >Atmospheric Intra-seasonal Oscillation and Summer Rainfall over the Yangtze-Huai River Valley
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Atmospheric Intra-seasonal Oscillation and Summer Rainfall over the Yangtze-Huai River Valley

机译：长江 - 淮河谷的大气内季节性振荡和夏季降雨

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摘要

The low frequency feature of summer rainfall over the Yangtze-Huai River valley and the influence of atmospheric intraseasonal oscillation (ISO) are studied by using data analysis. The 20-70 day (30-60 day and near by 20 day) oscillation is a fundamental feature of summer rainfall in the Yangtze-Huai River valley, particularly in the flood years. The ISO has different patterns in summer between the severe flood and the severe drought over the Yangtze-Huai River valley. At 200hPa over the Tibetan Plateau, there are such different circulation patterns of the ISO between the severe flood and drought years; a cyclonic circulation of the ISO locates over the Tibetan Plateau region in severe flood years but an anti-cyclonic circulation of the ISO locates over the Tibetan Plateau region in severe drought years. At 850hPa, an anti-cyclonic (cyclonic) circulation system of the ISO occurs over the areas to the south of the Yangtze River, the South China Sea and the Western Pacific regions and an ISO cyclonic (anti-cyclonic) circulation system over North China/Japan regions for severe flood (drought) years. The atmospheric ISO at 500hPa and 200hPa in the middle-high latitudes from Baikal to the Sea of Okhotsk is strong (weak) for severe flood (drought) years. The ISO in the middle-high latitudes can propagate southwards and meets with the northward propagating ISO from the lower latitudes over the Yangtze-Huai River valley in the severe flood years, but the southward propagation of the ISO is not clear in the severe drought years.
机译：利用数据分析研究了长泽 - 淮河谷夏季降雨量的低频特征及大气渗透振荡（ISO）的影响。 20-70天（30-60天，靠近20天）振荡是长江 - 淮河山谷夏季降雨的基本特征，特别是在洪水年。 ISO在夏天在繁殖洪水和长江 - 淮河谷的严重干旱之间具有不同的模式。在藏高原的200公顷，在严重的洪水和干旱之间存在不同的循环模式。 ISO的循环循环位于严重洪水年的藏高原地区，但ISO的反气旋循环位于严重干旱年的藏高原地区。在850HPa，ISO的抗旋风（循环）循环系统发生在长江，南海和西太平洋地区南部的地区和西太平洋地区南部的地区，并在华北地区的ISO循环（反周气旋）流通系统/日本严重洪水（干旱）多年地区。在500HPA和200HPa的大气ISO，来自贝绍尔的贝加尔人的中高纬度，对严重洪水（干旱）多年来的强烈（弱）。中高纬度的ISO可以在严重洪水年来向南传播和北向北繁殖的ISO，但在严重的洪水年度，南方繁殖的南方传播在严重的干旱期内并不清楚。

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