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首页> 外文期刊>Advances in Meteorology >Temporal and Spatial Evolution Features of Precipitable Water in China during a Recent 65-Year Period (1951-2015)
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Temporal and Spatial Evolution Features of Precipitable Water in China during a Recent 65-Year Period (1951-2015)

机译：最近65年期间可降水的时间和空间演化特征（1951 - 2015年）

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摘要

Water vapor in the atmosphere is not only an important greenhouse gas, but also an important factor that significantly affects the variations of global climate and water circulation. This study utilized the National Centers for Environmental Prediction (NCEP) and Climate Prediction Center Merged Analysis of Precipitation (CMAP) reanalysis data to probe the temporal and spatial distribution features of atmospheric precipitable water (PW) in China during a recent 65-year period (1951-2015), and the relationship between PW and actual precipitation was also studied. The temporal and spatial distribution characteristics of PW in China presented an overall decreasing spatial trend from the southeast to northwest direction.The spatial distribution pattern of the first eigenvector demonstrated that the PWin China shows nationwide variation features with a varying amount of PWacross different regions.The year 1967 was further identified as an important transition period for the temporal and spatial distribution characteristics of the PW. We also found that the PW had inherent variability of around 30 years. Regarding the relationship with precipitation, PW was most closely correlated with precipitation in the northeastern region and the upper northwestern region in China. Different regions displayed different efficiencies for converting PWto precipitation.The conclusions are useful for understanding the long-term water vapor evolution and its potential effects on precipitation in China.
机译：大气中的水蒸气不仅是一个重要的温室气体，而且也是一个重要的因素，这显着影响了全球气候和水循环的变化。本研究利用国家环境预测中心（NCEP）和气候预测中心合并沉淀（CMAP）再分析数据的分析，探讨了最近65年期间中国大气可降水（PW）的时间和空间分布特征（ 1951 - 2015年），还研究了PW和实际沉淀的关系。中国PW的时间和空间分布特征提出了从东南到西北方向的总体空间趋势。第一个特征向量的空间分布模式表明，Pwin中国展示了各种不同地区的全国范围内的特征。该1967年进一步确定了PW的时间和空间分布特征的重要转变期。我们还发现，PW具有大约30年的固有变化。关于与降水的关系，PW与东北地区和中国上西北地区的降水最密切相关。不同地区显示出转换PWTO降水的不同效率。结论对于了解中国的长期水蒸气演化及其对中国降水的潜在影响。

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