Quantifying the Haze Aerosol Optical Depth Over East Asia Using Modified MODIS Dark Target Algorithm
Abstract
Due to fast industrialization and development, China has been experiencing haze pollution episodes with both increasing frequencies and severity over the last three decades. Haze pollution severely harms the public health and disrupts the local economy. Long-range transport of pollution also impacts surrounding regions including the Korean peninsula and the Japanese archipelago. Generating accurate measurements of column integrated particulate matter from satellites is the first step to quantify, characterize and understand the impact of the haze phenomena over the entire East Asia region rather than addressing the issue locally from single point measurements. However, the complex lower boundary condition over urban areas, such as Beijing, along with the complicated aerosol composition of haze introduces difficulties for the MODIS Dark Target (DT) algorithm in its retrieval of aerosol optical depth (AOD). Filtering procedures in the DT algorithm can be altered to increase the data coverage over this region and the newly implemented urban scheme in the MODIS C6.1 DT product provides more accurate AOD retrievals over city targets. After adopting a new regional aerosol model, a more complete haze-oriented MODIS DT data set over East Asia will be generated, validated against ground-based measurements. Using this new data set, we will characterize the haze phenomena over East Asia.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.A13B..08S
- Keywords:
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- 0317 Chemical kinetic and photochemical properties;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 0322 Constituent sources and sinks;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 0345 Pollution: urban and regional;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 3311 Clouds and aerosols;
- ATMOSPHERIC PROCESSES