水稻甲烷排放遥感监测研究综述

A review of research on remote sensing monitoring of rice methane emissions

  • 摘要: 水稻甲烷排放是农业甲烷排放的重要来源,及时准确地估算水稻甲烷排放可为政策制定提供参考。通过概念辨析和文献调研的方法,综述了水稻甲烷排放遥感监测的数据来源、方法、不确定性,论述了水稻甲烷遥感监测技术的发展现状和未来展望。结果表明,遥感技术在水稻甲烷排放监测方面具有较大潜力,不仅能够通过自上而下的方法直接监测水稻甲烷排放情况,也能结合自下而上的方法实现水稻甲烷排放的间接估算。但如何提高自上而下和自下而上方法的准确性,缩小2类方法间的差异是亟需解决的关键问题。未来,新的遥感技术和性能更优越的传感器可为准确估算水稻甲烷排放提供更多保障;多源遥感数据融合以及自上而下和自下而上方法之间的结合是定量水稻甲烷排放遥感监测不确定性的重要研究方向。

     

    Abstract: Rice methane emissions are an important source of agricultural methane emissions, and timely and accurate estimation of rice methane emissions can provide valuable information for policymakers. The data sources, methods, and uncertainties of remote sensing monitoring of rice methane emissions, as well as its current status of development and future outlook, were summarized by means of conceptual analysis and literature research. The results show that remote sensing technology is largely promising for rice methane emission monitoring. It can not only directly monitor rice methane emissions through top-down methods but also indirectly estimate rice methane emissions by combining them with bottom-up methods. However, how to improve the accuracy of top-down and bottom-up methods and narrow the differences between the two types of methods is the key issue that needs to be addressed. In the future, new remote sensing technologies and sensors with better performance can provide additional assurance for accurate estimation of rice methane emissions. The fusion of remote sensing data from multiple sources and the combination of top-down and bottom-up methods are important research directions for quantifying the uncertainty of remote sensing monitoring of rice methane emissions.

     

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