Regional climate feedbacks in Central Chile and their effect on air quality episodes and meteorology
| Autor: | Pablo Hernandez, Rodrigo Delgado, Pablo E. Saide, Gregory R. Carmichael, Xiaoyan Jiang, Luisa T. Molina, Scott Spak, M. Mena-Carrasco |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Atmospheric Science
education.field_of_study geography geography.geographical_feature_category Meteorology Geography Planning and Development Population Air pollution Environmental Science (miscellaneous) medicine.disease_cause Aerosol Urban Studies Megacity Climatology medicine Environmental science Air quality management education Air quality index Mountain range |
| Zdroj: | Urban Climate Artículos CONICYT CONICYT Chile instacron:CONICYT |
| ISSN: | 2212-0955 |
| DOI: | 10.1016/j.uclim.2014.06.006 |
| Popis: | Santiago, an emerging megacity of 7 million plus inhabitants has shown great improvement in its air quality reducing PM 2.5 concentrations from 69 μg/m 3 in 1989 to 24 μg/m 3 in 2013 with a comprehensive air quality management strategy. An operational air quality forecasting model that has shown great potential in predicting air quality episodes is used to establish how the climate A1B scenario can impact the frequency of bad air days. In comparison to 2011, in 2050 extreme air quality episodes will be reduced in 20%. WRF-Chem is used to evaluate the effect of anthropogenic emissions on the regional climate including aerosol radiative feedbacks for October–November 2008. Anthropogenic emissions of sulfur and black carbon show different geographical patterns which result in local cooling (0.2–1 °C) in coastal Chile, due to large sources of SO 2 . Central Chile, where most of the population of the country lives, shows transportation of black carbon emissions into the Andes mountain range, resulting in local warming of 0.4 °C. While global forcings may cause regional heating for 2050, reducing current black carbon emissions in Central Chile can reduce anthropogenic warming with immediate benefits to the regional climate, and simultaneously reducing local air pollution. |
| Databáze: | OpenAIRE |
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