CLDAS土壤湿度业务产品的干旱监测应用

The CLDAS soil moisture operation products applied to monitor soil drought

针对2012年中国区域严重的干旱,利用2013年国家气象信息中心发布的中国气象局陆面数据同化系统(CLDAS-V1.0)土壤体积含水量数据集产品,并结合新的中国地表土壤水文参数数据集,计算2012年中国区域土壤相对湿度,依据《气象干旱等级》国家标准进行干旱监测.结果表明:该土壤相对湿度数据集能较为全面的反映2012年中国的干旱发生发展的空间特征,在西南、江淮黄淮、华南以及东北等4个主要的干旱区域表现的尤为明显.结果表明,利用土壤容重、田间持水量等信息,结合CLDAS-V1.0实时业务产品,可实时获取时空连续的土壤相对湿度产品,可以实现对中国区域的干旱实时监测.

In 2012 a serious drought happened in China. In this paper,combined with the latest state surface soil and hydrological parameters,using the soil volumetric water content products of CMA Land Data Assimilation System（ CLDAS-V1. 0）, published in November of 2013, relative soil moisture in China in 2012 was calculated. Then,agricultural drought can be monitored based on the state standard of Agricultural Climate Center of China. The result shows that it can reflect the change of drought in all years,especially in Southw est Chia,South China,Northeast China and the Huanghuai and Jianghuai plains. It is believe that a temporal-spatial continuous real-time product can be made out to monitor the drought and to support agriculture development in China.