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Multi-scenario, high-resolution Lagrangian transport modeling for the analysis of the Asian tropopause aerosol layer / by Jan Heinrich Clemens. [Wuppertal], November, 2023
Content
Introduction
The Asian tropopause aerosol layer
Surface air pollution and emissions in Asia
Transport within the Asian monsoon circulation
Composition and chemistry of the ATAL
Climate response to Asian aerosol and trace gases
Lagrangian transport modeling
Coordinate systems
Integration schemes
Grid interpolation
Parameterizations
Reanalysis data & models
ECMWF reanalysis
The Lagrangian transport models MPTRAC and CLaMS
High-performance Lagrangian transport modelling
Implementation of diabatic transport into MPTRAC
Evaluation of diabatic advection in MPTRAC
Diagnostics to evaluate the diabatic transport in MPTRAC
Results of the evaluation
Examples of trajectories and transport deviations
Transport uncertainties over 1 day
Uncertainty growth during 90 day forward calculations
Air parcel distribution on seasonal timescales
Differences between diabatic and kinematic calculations
Conservation of dynamical tracers in the stratosphere
Conclusions
Source regions of the Asian tropopause aerosol layer on the Indian subcontinent
Data and methods
COBALD aerosol measurements
Simulation scenarios
Classification of air parcel origin
Results
Transport pathways from source regions to the measured ATAL
Scenario intercomparison of contributions from source regions and related transport pathways
Scenario intercomparison of the temporal evolution of transport from the MBL to the measured ATAL
Backscatter changes associated with changes in the transport and source regions
Discussion and conclusions
Summary
The Asian tropopause aerosol layer
Performance optimization of Lagrangian transport calculations
Performance analysis of netcdf format, compression and chunking options
Optimization experiments with parallel IO and the MPI-3 shared memory model in CLaMS
Conclusions
Evaluation of diabatic advection in MPTRAC
Circulation in the UTLS
Source regions of the Asian Tropopause Layer on the Indian subcontinent
Definition of source regions
Transport pathways from source regions
PDF for different scenarios
PDF differences for different scenarios
Correlation to all regions
Sensitivity tests for simulations employing the ECP
List of figures
List of tables
List of abbreviations
List of symbols
Bibliography