The impact of orography on the troposphere-to-stratosphere transport during a typhoon event in the tropics
- 1Charles University (Prague, Czechia)
Abstract
Stratosphere-troposphere exchange (STE) plays a fundamental role in the global atmospheric budget of chemical constituents. The troposphere-to-stratosphere transport (TST), as a part of STE, can inject anthropogenic pollutants from the Earth’s surface into the stratosphere, changing its chemical composition and influencing radiative processes. On record, TST is a multi-scale process with various contributing mechanisms, often not fully qualified nor quantified. In the tropics, typhoons and the corresponding overshooting convection and updrafts have recently been highlighted as one of the TST mechanisms, contributing for instance to the moistening of the lower stratosphere. Expanding on this, our study proposes a novel mechanism for TST connected with the interaction of typhoons with orography, including modulation of typhoon updrafts and convection, orographic lifting, and orographic gravity waves. Combining a Lagrangian modeling tool with a high-resolution simulation of the landfall of typhoon Molave (2020) in the Philippines, our results show that the presence of orography enhances the transport of air from the planetary boundary layer to the upper troposphere–lower stratosphere (UTLS) region. The presented findings advance our understanding of tropical cyclones impacts on STE and may have significant implications for the long-range atmospheric transport of pollutants originating from tropics.
Versions
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BibTeX
@article{martina2026impact,
title = {{The impact of orography on the troposphere-to-stratosphere transport during a typhoon event in the tropics}},
author = {Massimo Martina and Anahí Villalba-Pradas and Šimon Bartoň and Petr Šácha},
journal = {Atmospheric Chemistry and Physics},
year = {2026},
month = oct,
doi = {10.5194/acp-26-13845-2026},
url = {https://acp.copernicus.org/articles/26/13845/2026/},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - The impact of orography on the troposphere-to-stratosphere transport during a typhoon event in the tropics
AU - Massimo Martina
AU - Anahí Villalba-Pradas
AU - Šimon Bartoň
AU - Petr Šácha
PY - 2026
DA - 2026/10/02
JO - Atmospheric Chemistry and Physics
DO - 10.5194/acp-26-13845-2026
UR - https://acp.copernicus.org/articles/26/13845/2026/
AB - Stratosphere-troposphere exchange (STE) plays a fundamental role in the global atmospheric budget of chemical constituents. The troposphere-to-stratosphere transport (TST), as a part of STE, can inject anthropogenic pollutants from the Earth’s surface into the stratosphere, changing its chemical composition and influencing radiative processes. On record, TST is a multi-scale process with various contributing mechanisms, often not fully qualified nor quantified. In the tropics, typhoons and the corresponding overshooting convection and updrafts have recently been highlighted as one of the TST mechanisms, contributing for instance to the moistening of the lower stratosphere. Expanding on this, our study proposes a novel mechanism for TST connected with the interaction of typhoons with orography, including modulation of typhoon updrafts and convection, orographic lifting, and orographic gravity waves. Combining a Lagrangian modeling tool with a high-resolution simulation of the landfall of typhoon Molave (2020) in the Philippines, our results show that the presence of orography enhances the transport of air from the planetary boundary layer to the upper troposphere–lower stratosphere (UTLS) region. The presented findings advance our understanding of tropical cyclones impacts on STE and may have significant implications for the long-range atmospheric transport of pollutants originating from tropics.
SN - 1680-7324
ER -