大气水汽激光雷达校准方法综述

WIREs Water Pub Date : 2023-12-28 DOI:10.1002/wat2.1712
Xinqian Guo, Decheng Wu, Zhenzhu Wang, Bangxin Wang, Cheng Li, Qian Deng, Dong Liu
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引用次数: 0

摘要

大气水汽是地球水循环的一个关键因素。作为一种重要的温室气体,大气水汽时空分布的变化可导致各种极端天气现象的发生。激光雷达具有很高的空间和时间分辨率,在水汽剖面探测方面具有很大的应用潜力。拉曼激光雷达和差分吸收激光雷达 (DIAL) 已成功用于探测大气水汽。系统校准对于确保测量到的剖面准确反映大气中水汽的浓度剖面至关重要。选择有效的系统校准方法可以确保激光雷达长期测量的准确性。本文回顾了近年来大气水汽激光雷达校准的最新进展和应用。介绍了拉曼激光雷达和 DIAL 校准的基本原理。讨论了系统校准的各种方法和优点。拉曼激光雷达有三种常用的校准方法:外部校准、内部校准和混合校准方法。最常用的方法是基于无线电探空仪的外部校准。DIAL 通常采用有利的自校准方法。最后,讨论了大气水汽激光雷达和校准技术的潜在发展方向。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A review of atmospheric water vapor lidar calibration methods

A review of atmospheric water vapor lidar calibration methods
Atmospheric water vapor is a crucial factor in the Earth's water cycle. As an important greenhouse gas, changes in the spatio-temporal distribution of atmospheric water vapor can contribute to the occurrence of various extreme weather phenomena. Lidar, with its high spatial and temporal resolutions, has great potential for applications in water vapor profile detection. Raman lidar and differential absorption lidar (DIAL) have been successfully used to detect atmospheric water vapor. System calibration is crucial to ensure that the measured profile accurately represents the concentration profile of atmospheric water vapor. Choosing an effective system calibration method can ensure the accuracy of long-term lidar measurements. This paper reviews the latest progress and applications of atmospheric water vapor lidar calibration in recent years. The basic principles of Raman lidar and DIAL calibration are introduced. Various methods and benefits of system calibration are discussed. Raman lidar has three commonly used calibration methods: external calibration, internal calibration, and hybrid calibration methods. The most commonly used method is external calibration based on radiosondes. DIAL is usually implemented with an advantageous self-calibration method. Finally, potential development directions for atmospheric water vapor lidar and calibration technology are discussed.
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