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Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers
Published on: March 21, 2016
Wildfire Dominates Spatio-Temporal Patterns of Ammonia Concentrations in Australia During the Warm Season
Qingmei Wang1,2, Ligang Wang3
1Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China. wangqm1015@163.com.
Abstract:
Atmospheric ammonia (NH3) is a critical environmental contaminant impacting ecosystem integrity and human health. In Australia, while anthropogenic sources are well-characterized, the contribution of wildfires to NH3 pollution remains poorly quantified. This study presents a high-resolution (0.25°) assessment of wildfire-induced NH3 concentrations across the whole Australia from July 2022 to December 2024, derived from chemical transport model simulations constrained by satellite fire observations. Analysis of warm seasons (September-February) reveals that wildfires dominated atmospheric NH3 contamination, contributing over 80% of total concentrations during major fire events. These findings highlight wildfires as a critical episodic source of reactive nitrogen pollution with significant implications for air quality toxicology, ecosystem eutrophication, and public health exposure in fire-prone regions.
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