Investigation and quantification of regional emissions of aerosols and trace gases during Ace-Asia
Abstract
During the ACE-Asia field experiment in the East Asia, some of the mission objectives were designed to understand the aging and transport features of pollution plumes from Asian megacities. The analysis of the ACE-Asia data set using the chemical transport model STEM will be presented with the focus of better understanding the chemical nature, transformation and transport of aerosols and trace gases from East Asia. Specifically, we identify with the help of our model those flight segments that are likely to hold a megacity signal, and estimate the age of the airmass. A significant fraction of the observation points can be classified to have passed in the vicinity of East Asian megacities, with ages from < a day to 5 days. The observed data are used to compare the signatures of the various megacities (e.g., Shanghai, Hong Kong, Linan, Seoul, Tokyo, etc.) with emission estimates and predicted values. This analysis provides a check on our Asian emission estimates. Modeling analysis is also used to estimate ozone production efficiencies. Additional analysis is performed to characterize the aging of these megacity plumes. Regional simulations with and without megacity emissions provide estimates of the aggregate impact of megacities on the trace gas and aerosol distributions.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2002
- Bibcode:
- 2002AGUFM.A11A0062T
- Keywords:
-
- 0305 Aerosols and particles (0345;
- 4801);
- 0345 Pollution: urban and regional (0305);
- 0365 Troposphere: composition and chemistry;
- 0368 Troposphere: constituent transport and chemistry