This title appears in the Scientific Report :
2018
Please use the identifier:
http://dx.doi.org/10.5194/acp-2018-337 in citations.
Please use the identifier: http://hdl.handle.net/2128/19913 in citations.
Lagrangian simulation of ice particles and resulting dehydration in the polar winter stratosphere
Lagrangian simulation of ice particles and resulting dehydration in the polar winter stratosphere
Polar ozone loss in late winter and early spring is caused by enhanced concentrations of active chlorine. The surface necessary for heterogeneous reactions activating chlorine species is provided by cold stratospheric aerosols and polar stratospheric clouds (PSCs). Moreover, sedimentation of PSC par...
| Personal Name(s): | Tritscher, Ines (Corresponding author) |
|---|---|
| Grooß, Jens-Uwe / Spang, Reinhold / Pitts, Michael C. / Poole, Lamont R. / Müller, Rolf / Riese, Martin | |
| Contributing Institute: |
Stratosphäre; IEK-7 |
| Published in: | Atmospheric chemistry and physics / Discussions Discussions [...] (2018) 337, S. 1 - 32 |
| Imprint: |
Katlenburg-Lindau
EGU
2018
|
| DOI: |
10.5194/acp-2018-337 |
| Document Type: |
Journal Article |
| Research Program: |
Composition and dynamics of the upper troposphere and middle atmosphere |
| Link: |
OpenAccess OpenAccess |
| Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/19913 in citations.
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| 245 | |a Lagrangian simulation of ice particles and resulting dehydration in the polar winter stratosphere | ||
| 260 | |a Katlenburg-Lindau |c 2018 |b EGU | ||
| 520 | |a Polar ozone loss in late winter and early spring is caused by enhanced concentrations of active chlorine. The surface necessary for heterogeneous reactions activating chlorine species is provided by cold stratospheric aerosols and polar stratospheric clouds (PSCs). Moreover, sedimentation of PSC particles changes the chemical composition of the lower stratosphere and alters the process of ozone depletion by irreversible redistribution of nitric acid and water vapor.The Chemical Lagrangian Model of the Stratosphere (CLaMS) simulates the nucleation, growth, sedimentation, and evaporation of PSC particles along individual trajectories. Particles consisting of nitric acid trihydrate (NAT) were the focus of previous work and are known for their potential to denitrify the polar stratosphere. Here, we carried this idea forward and introduced the formation of ice PSCs and the related dehydration within the sedimentation module of CLaMS.We show results from the Arctic winter 2009/2010, which is already well characterized because of the RECONCILE aircraft campaign and connected work. CLaMS simulations from the Antarctic winter 2011 complete this study and demonstrate the model's performance over an entire PSC season in the Southern Hemisphere. For both hemispheres, we present CLaMS results in comparison to PSC observations from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS). Moreover, we confront CLaMS simulations of water vapor with vortex-wide Microwave Limb Sounder (MLS) observations. Observations and simulations are compared on season-long and vortex-wide scales as well as for single PSC events. The simulations reproduce well both the timing and extent of PSC occurrence inside the entire vortex. Divided into specific PSC classes, CLaMS results show good agreement with CALIOP and MIPAS observations, even for specific days and single satellite orbits. The vertical redistribution of nitric acid and water during the polar winter season, as seen in the MLS data, is visible in the CLaMS data as well. Overall, a conclusive agreement between CLaMS and a variety of independent measurements is presented. | ||
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