Spatial patterns of precipitation anomalies for 30-yr warm periods in China during the past 2000 years
Spatial patterns of precipitation anomalies for 30-yr warm periods in China during the past 2000 years
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DOI：
10.1007/s13351-012-0302-1
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发表时间：
2012-07
影响因子：
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通讯作者：
Z. Hao;Jingyun Zheng;Q. Ge;Xuezhen Zhang
中科院分区：
文献类型：
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作者：
Z. Hao;Jingyun Zheng;Q. Ge;Xuezhen Zhang
利用中国历史文献中48个测站和自然档案中22个降水替代序列的干湿分级资料，研究了691-720、1231-1260、1741-1770、1921-1950和1981-2000年5个30年暖期降水异常的空间分布特征。研究发现，北中国平原(约35°-40°N，105°E以东)在百年暖期(600-750)、中世纪暖期(约900-1300)和1900年以后的4个暖期是干燥的。在1741年至1770年期间，中国的大部分地区处于潮湿状态，这是一个长达30年的暖峰，出现在小冰期(约1650年至1850年)。1981年-2000年中国东部(25°-40°N，105°E以东)的降水距平与1231年-1260年的降水距平基本一致，但青藏高原地区的降水距平有明显的差异。中国地区降水距平的空间分布在5个30年暖期内均有所不同，表明气温与降水变化的匹配格局是多样的，在不同的气候时期出现年代际暖气候时，降水异常可以是正的，也可以是负的。这一结果可为未来暖气候降水异常的机制探测和气候模拟提供初步参考。
The spatial patterns of precipitation anomalies during five 30-yr warm periods of 691–720, 1231–1260, 1741–1770, 1921–1950, and 1981–2000 were investigated using a dryness/wetness grading dataset covering 48 stations from Chinese historical documents and 22 precipitation proxy series from natural archives. It was found that the North China Plain (approximately 35°–40°N, east of 105°E) was dry in four warm periods within the centennial warm epochs of 600–750, the Medieval Warm Period (about 900–1300) and after 1900. A wet condition prevailed over most of China during 1741–1770, a 30-yr warm peak that occurred during the Little Ice Age (about 1650–1850). The spatial pattern of the precipitation anomaly in 1981–2000 over East China (25°-40°N, east of 105°E) is roughly consistent with that in 1231–1260, but a difference in the precipitation anomaly appeared over the Tibetan Plateau. The spatial patterns of the precipitation anomalies over China varied between all five 30-yr warm periods, which implies that the matching pattern between temperature and precipitation change is multiform, and the precipitation anomaly could be positive or negative when a decadal warm climate occurs in different climate epochs. This result may provide a primary reference for the mechanism detection and climate simulation of the precipitation anomaly of the future warm climate.