土壤学报2013，Vol.50Issue(4)：657-663,7.DOI:10.11766/trxb201210060395
自动观测与人工观测土壤温度差异及分析
DIFFERENCE BETWEEN SOIL TEMPERATURES OBTAINED THROUGH AUTOMATIC OBSERVATION AND MANUAL OBSERVATION AND ANALYSIS OF ITS CAUSES
摘要
Abstract
Based on the data obtained through manual observation and automatic observation during the period when all the basic meteorological stations in China monitored soil temperature using the two observation methods simultaneously,analyses were made of differences between soil temperatures obtained through different observation methods in various soil layers.Results show that the difference between manual observation and automatic observation in daily mean soil temperature was no more than 0.11 ℃ and decreased with increasing soil depth.In the soil layer of 5 cm ～ 320 cm,whether in winter or in summer,the mean difference was + 0.2℃ in most parts of China.Standard deviation of the daily mean difference in soil temperature between the two methods declined from 0.78℃ in the shallow soil layers to 0.47℃ in the deep soil layers,with uncertainty exceeding 1℃ in soil layers (5 cm ～20 cm),but lingering below 1℃ in soil layers (40 cm ～ 320 cm).As a matter of fact,no significant difference in daily mean of soil temperatures was found between automatic observation and manual observation in all the observation stations,except a few.The differences observed were attributed to in homogenous distribution of the horizontal temperature field and sharp vertical temperature gradient in the soil and asynchronous operation of the two methods.关键词
自动观测/人工观测/土壤温度/对比差值Key words
Automatic observation/ Manual observation/ Soil temperature/ Comparison difference分类
农业科技引用本文复制引用
任芝花,王国安,邹凤玲..自动观测与人工观测土壤温度差异及分析[J].土壤学报,2013,50(4):657-663,7.基金项目
国家重点基础研究发展计划(973计划)项目(2010CB951600)、公益性行业(气象)科研专项(GYHY201106038)和中国气象局气象新技术推广项目(CMATG2008Z12)共同资助 （973计划）
