Analyzing the Characteristics of Soil Moisture Using GLDAS Data: A Case Study in Eastern China
| Autor: | Yu Li, X. San Liang, Jingze Cai, Tingchen Jiang, Yuanzhi Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
eastern China
GLDAS data 010504 meteorology & atmospheric sciences Meteorology precipitation 010502 geochemistry & geophysics Atmospheric sciences 01 natural sciences lcsh:Technology soil moisture air temperature lcsh:Chemistry Data assimilation Spring (hydrology) General Materials Science Precipitation Instrumentation Water content lcsh:QH301-705.5 0105 earth and related environmental sciences Fluid Flow and Transfer Processes geography geography.geographical_feature_category lcsh:T Process Chemistry and Technology Eastern china General Engineering lcsh:QC1-999 Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Air temperature Environmental science lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 7, Iss 6, p 566 (2017) Applied Sciences; Volume 7; Issue 6; Pages: 566 |
| ISSN: | 2076-3417 |
| Popis: | In this paper, we use GLDAS (Global Land Data Assimilation System) to analyze the effects of air temperature and precipitation on the characteristics of soil moisture in the eastern region of China from 1961 to 2011. We find that the temperature and precipitation in different seasons have different degrees of influence on the characteristics of soil moisture in each layer. The results show that over the last 50 years, the soil moisture in eastern China has a tendency to dry out, especially between the late 1970s to the early 1980s. The change of soil moisture with the depth of soil layer has similar inter-annual and seasonal patterns. Soil moisture in different depths (0–200 cm) positively correlates with the air temperatures of spring, summer and autumn, but negatively correlates with the air temperature in winter at 0–10 cm, 40–100 cm and 100–200 cm. Similarly, soil moisture is positively related to the precipitation in spring, summer and autumn, and the opposite is true in winter. The results also show that precipitation has a significant effect on the shallow soil moisture (0–10 cm), while air temperature most affects the deep soil moisture (100–200 cm). |
| Databáze: | OpenAIRE |
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