TY  - JOUR
AU  - Konopka, Paul
AU  - Rolf, Christian
AU  - von Hobe, Marc
AU  - Khaykin, Sergey M.
AU  - Clouser, Benjamin
AU  - Moyer, Elisabeth
AU  - Ravegnani, Fabrizio
AU  - D'Amato, Francesco
AU  - Viciani, Silvia
AU  - Spelten, Nicole
AU  - Afchine, Armin
AU  - Krämer, Martina
AU  - Stroh, Fred
AU  - Ploeger, Felix
TI  - The dehydration carousel of stratospheric water vapor in the Asian summer monsoon anticyclone
JO  - Atmospheric chemistry and physics
VL  - 23
IS  - 20
SN  - 1680-7316
CY  - Katlenburg-Lindau
PB  - EGU
M1  - FZJ-2023-03894
SP  - 12935 - 12947
PY  - 2023
AB  - During the StratoClim Geophysica campaign, air with total water mixing ratios up to 200 ppmv and ozone up to 250 ppbv was observed within the Asian summer monsoon anticyclone up to 1.7 km above the local cold-point tropopause (CPT). To investigate the temporal evolution of enhanced water vapor being transported into the stratosphere, we conduct forward trajectory simulations using both a microphysical and an idealized freeze-drying model. The models are initialized at the measurement locations and the evolution of water vapor and ice is compared with satellite observations of MLS and CALIPSO. Our results show that these extremely high water vapor values observed above the CPT are very likely to undergo significant further freeze-drying due to experiencing extremely cold temperatures while circulating in the anticyclonic “dehydration carousel”. We also use the Lagrangian dry point (LDP) of the merged back-and-forward trajectories to reconstruct the water vapor fields. The results show that the extremely high water vapor mixed with the stratospheric air has a negligible impact on the overall water vapor budget. The LDP mixing ratios are a better proxy for the large-scale water vapor distributions in the stratosphere during this period.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001161774000001
DO  - DOI:10.5194/acp-23-12935-2023
UR  - https://juser.fz-juelich.de/record/1016987
ER  -