This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.5194/egusphere-2022-1462 in citations.
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2023-02303 in citations.
Identification of source regions of the Asian Tropopause Aerosol Layer on the Indian subcontinent in August 2016
Identification of source regions of the Asian Tropopause Aerosol Layer on the Indian subcontinent in August 2016
The Asian tropopause aerosol layer (ATAL) is a distinct feature during the Asian summer monsoon season with an impact on the regional radiative balance of the Earth's atmosphere. However, the source regions and the detailed transport pathways of ATAL particles are still uncertain. In this study...
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Personal Name(s): | Clemens, Jan (Corresponding author) |
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Vogel, Bärbel / Hoffmann, Lars / Griessbach, Sabine / Thomas, Nicole / Fadnavis, Survana / Müller, Rolf / Peter, Thomas / Ploeger, Felix | |
Contributing Institute: |
Jülich Supercomputing Center; JSC Stratosphäre; IEK-7 |
Imprint: |
2023
|
DOI: |
10.5194/egusphere-2022-1462 |
DOI: |
10.34734/FZJ-2023-02303 |
Document Type: |
Preprint |
Research Program: |
Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups Climate Feedbacks |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2023-02303 in citations.
The Asian tropopause aerosol layer (ATAL) is a distinct feature during the Asian summer monsoon season with an impact on the regional radiative balance of the Earth's atmosphere. However, the source regions and the detailed transport pathways of ATAL particles are still uncertain. In this study, we investigate transport pathways from different regions at the model boundary (MB) to the ATAL using the two Lagrangian transport models CLaMS (Chemical Lagrangian Model of the Stratosphere) and MPTRAC (Massive-Parallel Trajectory Calculations), two reanalyses (ERA5 and ERA-Interim), and balloon-borne measurements of the ATAL performed by the Compact Optical Backscatter Aerosol Detector (COBALD) above Nainital (India) in August 2016. Trajectories are initialized at the location of the ATAL, as measured by COBALD in the Himalayas, and calculated 90 days backward in time to investigate the relation between the measured, daily averaged, aerosol backscatter ratio and different source regions at the MB. Nine source regions at the MB are distinguished, marking continental and maritime sources in the region of the Asian monsoon. Different simulation scenarios are performed, to find systematic differences as well as robust patterns, when the reanalysis data, the trajectory model, the vertical coordinate (kinematic and diabatic approach) or the convective parameterisation are varied. |