GNSS掩星廓线分析火山喷发中对流层顶动态变化  

Analysis of the tropopause variation during the volcanic eruption based on GNSS radio occultation profiles

作　　者：刘宾 张绍成 余涛[2] 虢盛 LIU Bin;ZHANG Shaocheng;YU Tao;GUO Sheng(School of Geography and Information Engineering,China University of Geosciences,Wuhan 430074,China;Institute of Geophysics&Geomatics,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)地理与信息工程学院,武汉430074 [2]中国地质大学(武汉)地球物理与空间信息学院,武汉430074

出　　处：《测绘科学》2023年第2期92-99,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(42174043)。

摘　　要：针对2022年初汤加洪阿哈阿帕伊(HTHH)海底火山喷发引起对流层顶动态变化现象,该文提出基于GNSS掩星大气廓线快速产品分析汤加火山喷发期间的对流层顶动态变化。采用温度递减率法(LRT)确定的对流层顶,较好地反映火山喷发期间对流层顶空间结构,能够为火山喷发规模的量级提供数据支撑。本轮火山喷发记录对比表明,火山喷发引起对流层顶上升效应显著,且火山喷发强度与对流层顶维持高位的时长呈正相关,同时相应的对流层顶温度在较低水平维持。GNSS掩星技术可为火山喷发研究提供一种全新的且高效可靠的观测资料,可为类似地质灾害事件的影响量级评估提供参考。Aiming for the phenomenon of tropopause dynamic change caused by the submarine volcanic eruption of Tonga Tonga-Hunga Ha’apai(HTHH)in early 2022,the near real-time GNSS radio occultation profiles was used for analyzing the tropopause dynamic change during eruption of Tonga volcano in this paper.The tropopause height was defined with lapse rate tropopause(LRT)method,which could well reflect the spatial structure of the tropopause,and provided observations support for evaluation of the magnitude of volcanic eruption.Comparing with the volcanic eruptions record,the results showed that the rising effect of the tropopause caused by volcanic eruptions were obvious,and the scale of volcanic eruption was positively correlated with the duration of tropopause sustained high level,while the corresponding tropopause temperature was maintained at a low level.The GNSS radio occultation,as a new technology,could provide efficient and reliability observations for volcanic eruptions study,and also be used to assess the magnitude of the geological disasters.

关 键 词：GNSS掩星 HTHH火山 对流层顶 热力学方法 

分 类 号：P228.4[天文地球—大地测量学与测量工程] P412[天文地球—测绘科学与技术]