Ever since the founding of the PRC in 1949, Sino-Western European relationshave experienced three different phases. The first one ranging from 1950s toearly 1970s is the period in which the two sides were mainly seeki...Ever since the founding of the PRC in 1949, Sino-Western European relationshave experienced three different phases. The first one ranging from 1950s toearly 1970s is the period in which the two sides were mainly seeking to set up andnormalize their diplomatic ties. The second phase ranging from early 1970s to展开更多
文摘Ever since the founding of the PRC in 1949, Sino-Western European relationshave experienced three different phases. The first one ranging from 1950s toearly 1970s is the period in which the two sides were mainly seeking to set up andnormalize their diplomatic ties. The second phase ranging from early 1970s to
文摘2024年春季(3—5月)我国平均降水量为163 mm,为1961年以来历史同期第六多,4—5月东部地区旱涝灾害并重,华南和江南大部降水较常年同期偏多,尤其是华南大部降水偏多5成以上,多次暴雨过程造成部分地区发生洪涝;而黄淮、江淮北部降水显著偏少,春季后期干旱迅速发展。春季“华南涝、黄淮旱”的形成与东亚大气环流关键系统异常及其季节内阶段性变化密切相关。4月异常偏强、偏南的西北太平洋副热带高压和低层850 hPa偏强的西北太平洋反气旋为华南和江南提供了有利的水汽输送条件,导致南方地区发生多次强降水过程;而黄淮干旱主要受4—5月持续偏强的朝鲜半岛-日本海高压(小笠原高压)和偏南的西北太平洋副热带高压共同影响。此外,春季El Ni o衰减和热带印度洋海温异常偏暖有助于激发异常偏强的西北太平洋反气旋,是我国南方强降水发生的重要海洋外强迫背景。
