CRU数据集在黑龙江省ET_0计算中的应用

Application of CRU dataset to calculation of ET_0 of Heilongjiang Province

针对我国参考作物蒸发蒸腾量(ET0)计算中存在的气象数据不易获取、现有作物需水量数据空间分辨率较低等问题,以黑龙江省为例,基于10 min分辨率的CRU CL 2.0数据集,采用FAO Penman-Monteith公式建立了适于计算区域ET0的栅格模型,并应用黑龙江省14个气象站的实测气象数据对该模型计算成果进行了验证。结果表明:采用CRU CL 2.0数据计算区域ET0是可行的,其计算结果与应用实测气象数据计算所得的ET0符合较好,不仅可以细化我国ET0和作物需水量研究成果,也为气象资料缺乏情况下的ET0计算供了一种新的计算模式。

In the calculation of reference crop evapotranspiration （ET0 ） in China, meteorological data are difficult to access, and there is a low spatial resolution of the data on crop water requirements. To solve these problems, a grid computing model for ET0 was developed using the FAO Penman-Monteith equation in a case study in Heilongjiang Province. A dataset of CRU （climatic research unit） CL 2. 0 with a resolution of 10 minutes was used to construct the model. This model was validated with observed meteorological data from 14 meteorological stations in Heilongjiang Province. The results show that the performance of the model is acceptable. The ET0 calculated with the model agreed with that calculated using observed meteorological data. Results from the present research not only help refine the research results of ET0 and crop water requirements in China, but also provide an innovative model for calculating ET0 in regions lacking meteorological data.