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Impacts of Asian Pollution Outflows on the Pacific Storm Track

  • Yuan WangEmail author
Chapter
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Part of the Springer Theses book series (Springer Theses)

Abstract

Increasing levels of particulate matter pollutants over the continents and associated pollution outflows have raised considerable concerns because of their potential impacts on the Pacific storm track and the regional climate. Inspired by the previous research work in our group (Zhang et al. 2007; Li et al. 2008a), which investigated the interannual trend of deep convective clouds and precipitation over the North Pacific from the observational dataset, I kept seeking the observational evidences and theoretical basis for the impacts of Asian pollution outflows on the storm track. In this study, we have derived and identified the interannual variation of Northwest Pacific storm track intensity on the basis of reanalysis datasets. Various modeling approaches have been utilized to tackle the multiscale nature of the interaction between aerosols and large-scale circulations. Seasonal (2 month) simulations using a CR-WRF model with a two-moment bulk microphysics have been conducted to examine the aerosol effects on the regional climate over the Pacific storm track. Subsequently, the anomalies of the diabatic heating rates produced by the Asian pollution outflow from the CR-WRF simulations are prescribed in the NACR Community Atmosphere Model (CAM5) as the aerosol forcing terms. Simulations of three winters using CAM5 with and without the derived aerosol forcings have been performed. In addition, the comparisons to the results from the multiscale aerosol-climate modeling framework have been conducted to further validate the responses of the Pacific storm track to the different aerosol forcings associated with elevated pollution levels.

Keywords

Multiscale modeling Asian pollution Pacific storm track 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.California Institute of TechnologyPasadenaUSA

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