摘要
在全球变暖背景下,土壤水分是影响气候干旱、作物生长和环境变化的关键因素.利用遥感技术反演土壤水分,不仅能提高干旱预警能力,对于农业发展、生态保护和修复也具有重要意义.本文总结了当前土壤水分反演常用的遥感数据并分析其发展趋势,从光学、主被动微波角度详细阐述了各反演方法的原理、优缺点及发展方向,并进一步探讨了土壤水分研究的4个主要领域:主被动微波、多源数据融合、空间尺度转换及方法和模型的改进.最后,总结了遥感技术在土壤水分反演领域的演变趋势,并对未来发展提出展望.
Abstract
In the context of global warming,soil moisture is a key factor affecting climate drought,crop growth,and environmental change.Using remote sensing technology to estimate soil moisture not only enhances drought early warning capabilities but also holds significant implications for agricultural development,ecological protection,and restoration.This article summarizes the currently used remote sensing data for soil moisture inversion and analyzes its development trends.It elaborates in detail on the principles,advan-tages,and disadvantages of each inversion method from optical and active-passive microwave perspectives,and further explores four main areas of soil moisture research:active-passive microwave,multisource data fusion,spatial scale conversion,and methods and model improvements.Finally,it outlines the evolutionary trends of remote sensing technology in the field of soil moisture inversion and presents a future outlook.
维普
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