Map showing an example of how chemical signature informs the dynamics of the Asian Summer Monsoon flow pattern
An example of how chemical signature informs the dynamics of the Asian Summer Monsoon flow pattern. The upper-tropospheric dynamics is represented by the black contours, which illustrate atmospheric pressure systems. The chemistry is represented by the color, which represents the amount of carbon monoxide. The high carbon monoxide concentration in the pressure system over the western Pacific indicates that the air mass is transported from over the Asian continent. The Tibetan Plateau is highlighted by the white contour. Credit: Honomichl and Pan [2020], Figure 4c
Source: Journal of Geophysical Research: Atmospheres

Modern studies on the ancient subject of the Asian Summer Monsoon need fresh ideas with creative and advanced approaches to make a fundamental breakthrough. Understanding the monsoon heavily depends on how interactions of its many components can be clearly dissected.

Honomichl and Pan [2020] applied chemical data and chemical transport analysis to shed light on how the Asian Summer Monsoon relates the Tibetan Plateau to the remote western Pacific and induces exchanges between the troposphere and stratosphere. More than half of the air parcels cross the tropopause into the lower stratosphere within 30 days after reach the western Pacific. This is a welcome advancement from the traditional monsoon studies that rely solely on conventional statistics (correlation, composite) of physical variables.

Citation: Honomichl, S. B., & Pan, L. L. [2020]. Transport from the Asian summer monsoon anticyclone over the western Pacific. Journal of Geophysical Research: Atmospheres, 125, e2019JD032094.

—Chidong Zhang, Editor, JGR: Atmospheres

Text © 2020. The authors. CC BY-NC-ND 3.0
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