摘要
对湛江地面气象观测站2008年0～50 cm土壤湿度、降水及蒸发皿蒸发资料进行了分析。结果表明,湛江土壤湿度的垂直分布形态为垂直均匀型;按土壤湿度随时间的变化规律,可将其划分为春季相对稳定期、夏季增墒期和秋季迅速下降期3个时段。对0～10 cm、10～30 cm与30～50 cm土层土壤湿度进行回归分析,表明土壤湿度与降水量、蒸发皿蒸发量存在线性关系,除春季30～50 cm土壤湿度的预报值明显偏低外,其余回归方程的预报结果均较好。同一土壤类型、不同时段,或同一时段、不同的土壤层次,拟合的方程不同,反映出土壤湿度时间和空间分布的复杂性。
The data of soil moisture within the layer of 0～50 cm,precipitation and evaporation in Zhanjiang were analyzed.The results showed that the soil moisture was vertical uniformly distributed in Zhanjiang.The variation of soil moisture with time could be divided into three periods： relative stable period,increasing period and rapid descending period.With regressive analysis,it was found that there were linear relations between soil moisture and rainfall/evaporation,the forecast value were confidence.But the regressive equations were different when the period or the layer was different,reflecting the complexity of the soil moisture distributing.
出处
《热带气象学报》
CSCD
北大核心
2011年第1期125-132,共8页
Journal of Tropical Meteorology
基金
广东海洋大学科研项目(0812070)"我国高空大气水汽变化研究"资助
关键词
气候学
土壤湿度
回归分析
湛江
climatology
soil moisture
regressive analysis
Zhanjiang
