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Journal Articles Journal of Geophysical Research: Atmospheres Year : 2022

A Multimodel Investigation of Asian Summer Monsoon UTLS Transport Over the Western Pacific

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Qing Liang
Mian Chin
Peter Colarco
Juying Warner
Adrien Vuvan
  • Function : Author
  • PersonId : 1132648
Cathy Clerbaux
Elliot Atlas
Paul Newman
Troy Thornberry
Owen Toon

Abstract

The Asian summer monsoon (ASM) as a chemical transport system is investigated using a suite of models in preparation for an airborne field campaign over the Western Pacific. Results show that the dynamical process of anticyclone eddy shedding in the upper troposphere rapidly transports convectively uplifted Asian boundary layer air masses to the upper troposphere and lower stratosphere (UTLS) over the Western Pacific. The models show that the transported air masses contain significantly enhanced aerosol loading and a complex chemical mixture of trace gases that are relevant to ozone chemistry. The chemical forecast models consistently predict the occurrence of the shedding events, but the predicted concentrations of transported trace gases and aerosols often differ between models. The airborne measurements to be obtained in the field campaign are expected to help reduce the model uncertainties. Furthermore, the large-scale seasonal chemical structure of the monsoon system is obtained from modeled carbon monoxide, a tracer of the convective transport of pollutants, which provides a new perspective of the ASM circulation, complementing the dynamical characterization of the monsoon.
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Dates and versions

insu-03897762 , version 1 (14-12-2022)

Identifiers

Cite

Laura L. Pan, Douglas Kinnison, Qing Liang, Mian Chin, Michelle L. Santee, et al.. A Multimodel Investigation of Asian Summer Monsoon UTLS Transport Over the Western Pacific. Journal of Geophysical Research: Atmospheres, 2022, 127 (24), pp.e2022JD037511. ⟨10.1029/2022JD037511⟩. ⟨insu-03897762⟩
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