TY  - JOUR
AU  - Ploeger, Felix
AU  - Konopka, Paul
AU  - Walker, Kaley
AU  - Riese, Martin
TI  - Quantifying pollution transport from the Asian monsoon anticyclone into the lower stratosphere
JO  - Atmospheric chemistry and physics
VL  - 17
IS  - 11
SN  - 1680-7324
CY  - Katlenburg-Lindau
PB  - EGU
M1  - FZJ-2017-06834
SP  - 7055 - 7066
PY  - 2017
AB  - Pollution transport from the surface to the stratosphere within the Asian monsoon circulation may cause harmful effects on stratospheric chemistry and climate. Here, we investigate air mass transport from the monsoon anticyclone into the stratosphere using a Lagrangian chemistry transport model. We show how two main transport pathways from the anticyclone emerge: (i) into the tropical stratosphere (tropical pipe), and (ii) into the Northern Hemisphere (NH) extratropical lower stratosphere. Maximum anticyclone air mass fractions reach around 5 % in the tropical pipe and 15 % in the extratropical lowermost stratosphere over the course of a year. The anticyclone air mass fraction correlates well with satellite hydrogen cyanide (HCN) and carbon monoxide (CO) observations, confirming that pollution is transported deep into the tropical stratosphere from the Asian monsoon anticyclone. Cross-tropopause transport occurs in a vertical chimney, but with the pollutants transported quasi-horizontally along isentropes above the tropopause into the tropics and NH.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000403219000006
DO  - DOI:10.5194/acp-17-7055-2017
UR  - https://juser.fz-juelich.de/record/838130
ER  -