由 张 良承 A New Technology to Detect the Tropopause Solving Some Radiosonde Datas Insufficient Detection Height Problem
一种探测对流层顶的新技术：解决部分无线电探空资料探测高度不足问题
引文格式 | Citation:
XIA P, SHAN Y, YE S, et al. A New Technology to Detect the Tropopause, Solving Some Radiosonde Data’s Insufficient Detection Height Problem[J]. IEEE Transactions on Geoscience and Remote Sensing, 2024, 62: 1-13. DOI:10.1109/TGRS.2023.3345945.
IEEE Transactions on Geoscience and Remote Sensing（中科院1区Top，IF：7.5）
Covariance transformation of the logarithm
Radiosonde
refractivity
tropopause
Radiosonde
refractivity
tropopause
Abstract | 摘要
This study analyzed variations of the global tropopause structure using radiosonde products from 2010 to 2020. First, the covariance transformation of the logarithm of the refractivity (CTLR) method was successfully applied to radiosonde data to determine tropopause, which also contributed to solve the problem that CTLR cannot be widely utilized on radiosonde data due to low top height. Then, nearly 1000 radiosonde stations’ observed data from 2010 to 2020 were collected to determine global tropopause with the CTLR method. Finally, the study analyzed the characteristics of changes in global tropopause in the last decade. The results revealed a continuous rise in tropopause from 2010 to 2020 and it increased at a rate of 11–13 m/year. The measurements from the lapse rate tropopause (LRT) method are consistent with those results. The continuous rise of tropopause (predominantly mid-latitude) is primarily due to tropospheric warming and stratospheric cooling. This increasing trend remains after removing natural variability, which can provide further observational evidence for global warming due to human activities.
本研究利用2010–2020年无线电探空资料分析了全球对流层顶结构变化。首先，成功将对数折射率协方差变换法应用于探空数据以确定对流层顶高度，解决了因探空数据顶层高度不足导致该方法难以广泛应用的问题。随后，收集近千个探空站点2010–2020年的观测数据，采用CTLR方法确定了全球对流层顶高度。最后，系统分析了近十年来全球对流层顶的变化特征。结果表明：2010–2020年期间全球对流层顶持续上升，上升速率为11–13米/年；基于递减率对流层顶法的测量结果与此一致。对流层顶的持续上升（主要发生在中纬度地区）主要归因于对流层增温与平流层降温。在剔除自然变率影响后该上升趋势依然存在，这为人类活动导致的全球变暖提供了进一步的观测证据。