NDLI: On the temporal and spatial structure of troposphere-to-stratosphere transport in the lowermost stratosphere over the Asian monsoon region during boreal summer

Content Provider	Springer Nature Link
Author	Chen, Bin Xu, Xiang De Yang, Shuai Zhang, Wei
Copyright Year	2012
Abstract	This study produced a novel characterization of the troposphere-to-stratosphere transport (TST) over the Asian monsoon region during boreal summer, using a comprehensive analysis of 60-day backward trajectories initialized in the stratosphere. The trajectory datasets were derived from the high-resolution Lagrangian particle dispersion model (FLEXPART) simulation driven by the wind fields acquired from the National Center for Environmental Prediction (NCEP). The results indicate that the distribution of residence time (t TST) of tropopause-crossing trajectories in the lowermost stratosphere represents a horizontal signature of the Asian summer monsoon. Vertically, the distribution of t TST can be roughly separated into two layers: a consistent lower layer with t TST <5 days forming a narrow band, corresponding to a layer ∼3 km thick following the location of the tropopause, and an upper layer at a larger distance from the local tropopause. The maximum residence time was ∼20 days, especially within the Asian high anticyclone consistent with its confinement effects. In general, the overall geographical distribution of dehydration points was not coincident with the location of tropopause crossing. TST trajectories, which were initialized in the stratosphere, underwent their Lagrangian cold points mostly in the tropics and subtropics 1–4 days after the TST event; they were characterized by a wide range of temperature differences, with a mean value of 3–12 K. The vertical extent of the influence of tropospheric intrusion on the Asian monsoon region in the stratosphere exhibited a peak at ∼16.5–18.5 km, and the uppermost height was ∼21 km.
Starting Page	1305
Ending Page	1317
Page Count	13
File Format	PDF
ISSN	02561530
Journal	Advances in Atmospheric Sciences
Volume Number	29
Issue Number	6
e-ISSN	18619533
Language	English
Publisher	SP Science Press
Publisher Date	2012-10-19
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	troposphere-to-stratosphere-transport Asian summer monsoon lower stratosphere structure Geophysics/Geodesy Meteorology/Climatology
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science

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