【摘要】 利用1981-2008年美国国家环境预报中心气候预测系统再分析资料,对中国及其周边地区夏季土壤湿度、潜热通量、抬升凝结高度以及降水量的空间分布特征和土壤湿度-降水耦合特征进行了统计分析.结果表明,在土壤湿度较大的地区,潜热通量和降水量较大,抬升凝结高度较小;在土壤湿度较小的地区,潜热通量和降水量较小,而抬升凝结高度较大;在中国华北平原部分地区、东北平原部分地区、海南岛以及贝加尔湖以南部分地区,土壤湿度-降水耦合较强;在土壤湿度-降水耦合中,潜热通量起着十分重要的作用,耦合弱的原因可能在于潜热通量小且空间变化不明显.更多还原

【Abstract】 Based on the national centers for environmental prediction and climate forecast system reanalysis data from 1981 to 2008, this paper studied the spatial distribution characteristics of soil moisture,latent heat flux, height of lifting condensation level and precipitation, as well as the coupling characteristics between soil moisture and precipitation in summer. The results showed that, generally in areas with greater soil moisture, the latent heat flux and precipitation were larger, while the height of the lifting condensation level smaller. In areas with a lower soil moisture, the latent heat flux and precipitation were smaller, while the height of the lifting condensation level larger. The soil moisture-precipitation coupling was stronger in parts of the North China Plain, Northeast China Plain, Hainan Island, and parts of the south of Lake Baikal. And in the soil moisture-precipitation coupling, the latent heat flux played a very important role; the reason for the weak coupling was probably that the latent heat flux was small and its spatial variation not obvious.更多还原