华北地区土壤水分的时空变化特征

doi:10.13287/j.1001-9332.202112.008

应用生态学报 ›› 2021, Vol. 32 ›› Issue (12): 4203-4211.doi: 10.13287/j.1001-9332.202112.008

华北地区土壤水分的时空变化特征

李轩¹, 过志峰^2*, 吴门新¹, 何延波¹

¹国家气象中心, 北京 100081;
²中国科学院空天信息创新研究院, 北京 100101

收稿日期:2021-05-09 修回日期:2021-08-13 出版日期:2021-12-15 发布日期:2022-06-15
通讯作者: *E-mail: guozf@aircas.ac.cn
作者简介:李轩, 女, 1976年生, 硕士, 高级工程师。主要从事生态和农业气象业务研发及生态和农业气象大数据分析。E-mail: lixuan@cma.gov.cn
基金资助:
国家气象中心预报员专项(Y202118)和国家重点研发计划项目(2018YFC1506500)资助

Temporal and spatial variations of soil moisture in North China

LI Xuan¹, GUO Zhi-feng^2*, WU Men-xin¹, HE Yan-bo¹

¹National Meteorological Center, Beijing 100081, China;
²Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

Received:2021-05-09 Revised:2021-08-13 Online:2021-12-15 Published:2022-06-15
Contact: *E-mail: guozf@aircas.ac.cn
Supported by:
Forecaster Program of National Meteorological Center (Y202118) and the National Key R&D Program of China (2018YFC1506500)

摘要/Abstract

摘要： 土壤水分是重要的水文参数,也是水循环、气候变化等研究的基本要素。本研究利用中国气象局新一代自动土壤水分观测网逐小时土壤水分观测数据,分析2013—2019年间华北地区土壤水分的时空分布和变化趋势及其与降水和温度的关系。结果表明: 研究期间,华北地区10~100 cm土层土壤水分整体呈波动下降趋势,尤以100 cm根区土壤水分减少最明显。华北地区不同深度土壤水分空间分布均呈东南高、西北低的特征。10 cm土层63%面积缺墒。不同深度土壤水分随季节变化明显,夏季各层土壤水分达到最高,墒情适宜,春季土壤水分处于低值。土壤水分与降水和温度均具有较好的响应关系,随着土壤深度的增加相关性逐渐减弱,且土壤水分对降水的响应比对气温的响应更显著。

关键词: 土壤水分, 时空分布, 降水, 温度

Abstract: Soil moisture is an important hydrological parameter and a basic element for research in water cycle and climate change. Using hourly recorded soil moisture data of 374 stations from the new generation of automatic soil moisture encryption observation network constructed by China Meteo-rological Administration, we analyzed the spatial and temporal variations of soil moisture in North China from 2013 to 2019 and the relationship with precipitation and temperature. The results showed that soil moisture in 10-100 cm layer decreased fluctuatly as a whole, with the decreasing at the 100 cm being serious. The spatial distribution of soil moisture at different depths was characterized by high in the southeast and low in the northwest. About 63% of the surface layer was short of moisture. Soil moisture at different depths changed significantly with the seasons. In summer, soil moisture of each layer reached the highest and soil entropy of each layer was suitable, while it reached a low point in spring. Soil moisture was closely correlated with precipitation and temperature, but the correlation got weaker gradually with the increase of soil depth. Soil moisture was more sensitive to precipitation than to temperature.

Key words: soil moisture, temporal and spatial distribution, precipitation, temperature

李轩, 过志峰, 吴门新, 何延波. 华北地区土壤水分的时空变化特征[J]. 应用生态学报, 2021, 32(12): 4203-4211.

LI Xuan, GUO Zhi-feng, WU Men-xin, HE Yan-bo. Temporal and spatial variations of soil moisture in North China[J]. Chinese Journal of Applied Ecology, 2021, 32(12): 4203-4211.

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华北地区土壤水分的时空变化特征

Temporal and spatial variations of soil moisture in North China

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