The spatial distribution of precipitation over the West Qinling region, China, AD 1470-2000
The spatial distribution of precipitation over the West Qinling region, China, AD 1470-2000
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公元1470-2000年中国西秦岭地区降水空间分布
DOI：
10.1016/j.palaeo.2015.12.003
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Liu Ting
中科院分区：
文献类型：
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作者：
Yang Fengmei;Wang Naiang;Shi Feng;Ljungqvist Fredrik Charpentier;Zhao Sen;Liu Ting
西秦岭是分隔中国南北北方的气候屏障的一部分，位于亚洲夏季风主导地区的边缘。为探讨西秦岭地区区域水文气候变异的空间分布特征，利用39条树木年轮年表和28个干湿指数重建了西秦岭地区1470 ~ 2000年雨季（5 - 6 - 7 - 8 - 9月）降水异常的空间场。结果表明，在年际尺度上，厄尔尼诺-南方涛动（ENSO）和对流层两年振荡（TBO）可能共同影响西秦岭地区降水的空间格局。1990年代的干旱超过了该地区自公元1470年以来发生的所有其他干旱时期的幅度和持续时间。新的降水场重建评估了西秦岭地区历史水文气候变化的空间格局，并提供了一个机会，以测试气候模式在模拟区域降水变率和变化的性能。
The West Qinling Mountains form part of the climatic barrier that separates southern and northern China, and are located at the edge of the region dominated by the Asian summer monsoon. To investigate the spatial distribution of regional hydroclimatic variability in the West Qinling region, the annually resolved spatial field of rainy season (May–June–July–August–September, MJJAS) precipitation anomalies from AD 1470 to 2000 was reconstructed using 39 tree-ring chronologies, as well as 28 dryness/wetness indices derived from historical documentary data. The results indicate that the El Niño–Southern Oscillation (ENSO) and the Tropospheric Biennial Oscillation (TBO) may jointly affect the spatial pattern of precipitation over the West Qinling Mountains at inter-annual timescales. The drought in the 1990s was found to exceed the amplitude and duration of all other periods of drought that have occurred since AD 1470 in this region. The new precipitation field reconstruction assesses the spatial pattern of historical hydroclimatic variability in the West Qinling region and provides an opportunity to test the performance of climate models in simulating regional precipitation variability and change.