自动土壤水分观测值订正方法及湿度产品分析

Correction Method of Automatic Soil Moisture Observation and Moisture Product Analysis

自动土壤水分仪替代人工对土壤湿度进行测量时,所测得的数据需要进行校正,才能进入农业气象业务使用。本文介绍了自动土壤水分观测的订正方法和质控方法,从土壤湿度产品效果来看,土壤不同深度的体积含水量与降水相关性存在较大差异,其中表层变化最为明显,深层基本不受影响;在我国大范围的一次寒潮过程前后,东北地区、西北部地区土壤体积含水量发生了较大范围的改变,但这对仅受降雨影响的南方来说并不明显。

Using soil moisture observation to replace the manual observation ,the ob-servation data needs to be corrected before entering the agricultural meteorological service. This paper introduced the correction method and quality control of automatic soil moisture observation. From the view of the effect of soil moisture content, there were great differences of correlation between soil moisture content and precipitation among different levels ,and the surface changed most obviously, In a cold-air outbreak in China,the soil moisture contents in the northeast and northwest changed greatly, but not obviously in the rain-affected south.