Satellite-Based Daily PM Estimates During Fire Seasons in Colorado

Overview

Journal J Geophys Res Atmos

Date 2019 Jul 11

PMID 31289705

Citations 14

Authors

Guannan Geng

Nancy L Murray

Daniel Tong

Joshua S Fu

Xuefei Hu

Pius Lee

Xia Meng

Howard H Chang

Yang Liu

Affiliations

Soon will be listed here.

Abstract

The western United States has experienced increasing wildfire activities, which have negative effects on human health. Epidemiological studies on fine particulate matter (PM) from wildfires are limited by the lack of accurate high-resolution PM exposure data over fire days. Satellite-based aerosol optical depth (AOD) data can provide additional information in ground PM concentrations and has been widely used in previous studies. However, the low background concentration, complex terrain, and large wildfire sources add to the challenge of estimating PM concentrations in the western United States. In this study, we applied a Bayesian ensemble model that combined information from the 1 km resolution AOD products derived from the Multi-angle Implementation of Atmospheric Correction (MAIAC) algorithm, Community Multiscale Air Quality (CMAQ) model simulations, and ground measurements to predict daily PM concentrations over fire seasons (April to September) in Colorado for 2011-2014. Our model had a 10-fold cross-validated R of 0.66 and root-mean-squared error of 2.00 μg/m, outperformed the multistage model, especially on the fire days. Elevated PM concentrations over large fire events were successfully captured. The modeling technique demonstrated in this study could support future short-term and long-term epidemiological studies of wildfire PM.

Citing Articles

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Public Health Benefits From Improved Identification of Severe Air Pollution Events With Geostationary Satellite Data.

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Wildland Fires Worsened Population Exposure to PM Pollution in the Contiguous United States.

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