Convergent evidence for the pervasive but limited contribution of biomass burning to atmospheric ammonia in peninsular Southeast Asia
نویسندگان
چکیده
Abstract. Ammonia (NH3) is an important agent involved in atmospheric chemistry and nitrogen cycling. Current estimates of NH3 emissions from biomass burning (BB) differ by more than a factor 2, impeding reliable assessment their environmental consequences. Combining high-resolution satellite observations columns with network measurements the concentration stable isotope composition (?15N) NH3, we present coherent amount derived BB heartland Southeast Asia, tropical monsoon environment. Our results reveal strong variability levels time space across different landscapes. All evidence on hand suggests that anthropogenic activities are most modulating control respect to observed patterns distribution study area. N-isotope balance considerations revealed during intensive fire period, input accounts for no 21±5 % (1?) ambient even at rural sites proximity areas. N-isotope-based variation relative contribution BB-derived further validated independently through particulate K+, chemical tracer BB. findings underscore BB-induced environments can be much lower previously anticipated, implications future modeling studies better constrain climate air quality effects wildfires.
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ژورنال
عنوان ژورنال: Atmospheric Chemistry and Physics
سال: 2021
ISSN: ['1680-7316', '1680-7324']
DOI: https://doi.org/10.5194/acp-21-7187-2021