Decennial Time Series Estimates of Tropopause heights on global scale by measurements of bending angles suffered by GNSS signals through the atmosphere
- Paper number
IAC-21,B1,3,7,x65183
- Author
Dr. Andrea Andrisani, Italy, Agenzia Spaziale Italiana (ASI)
- Coauthor
Dr. Francesco Vespe, Italy, Agenzia Spaziale Italiana (ASI)
- Year
2021
- Abstract
Variability in the heights of the tropopause (TH) – the atmospheric layer between the troposphere and the stratosphere – is deemed as a relevant fingerprint of climate changes, strongly related to the global warming of the troposphere. TH depends by stratosphere–troposphere energy and matter exchanges. In particular it is affected by the over-shooting in the stratosphere of water vapor coming from the warmed troposphere occurring at the tropics . For these reasons, monitoring of tropopause altitudes and determination of possible local/global trends of them are extremely important for climate investigations. In this work we will perform an investigation about the global behaviour of tropopause in a period from 2006 to 2020; i.e since when COSMIC costellation is flying. COSMIC is a joint Taiwan-USA space mission devoted to GNSS Radio Occultation (GNSS-RO) . For this investigation we adopt a definition of tropopause height based on the presence of bumps in bending angle profiles (BA) provided by GNSS-RO as described in [1]. It was demonstrated that the ways to determine tropopause heights from GNSS-RO bumps can uniquely determine TH in a sharper way than the lapse rate or the cold point definition. We are confident that the huge amount of COSMIC data available in the period-2006-2020 will allow to perform an exhaustive and robust analysis of the climate trends through the tropopause behaviour study on global scale. Bibliography [1] Vespe, F.; Pacione, R.; and Rosciano, E. “A Novel Tool for the Determination of Tropopause Heights by Using GNSS Radio Occultation Data”, Atmospheric and Climate Sciences, 2017,7, pp. 301-313.
- Abstract document
- Manuscript document
(absent)