Satellites may underestimate rice residue and associated burning emissions in Vietnam

Bibliographic Data

ID15545613
AuthorsKristofer Lasko (0000-0001-8980-8943, University of Maryland, College Park, corresponding author), Krishna Prasad Vadrevu (0000-0003-4407-5605, Marshall Space Flight Center), Vinh T Tran (0000-0002-2413-8616, Hanoi Pedagogical University 2), Evan Ellicott (0000-0002-8308-8604, University of Maryland, College Park), Thanh T N Nguyen, Thi Nhat Thanh Nguyen (0000-0002-7253-3813), Quang Hung Bui (0000-0001-5250-4719), Hung Q Bui, Christopher Justice, Christopher O Justice (University of Maryland, College Park)
Year2017
Volume12
Issue8
Pages085006-085006
Publication date2017-05-26
Open AccessYes
TypeARTICLE
VenueEnvironmental Research Letters (JOURNAL)
Journal identifiersISSN: 1748-9326 • E-ISSN: 1748-9326
PublisherIOP Publishing (PUBLISHER • GB)
DOI10.1088/1748-9326/aa751d
PMID30705690
OpenAlexW2620248578
LanguageEN
Citations received3
References cited58

In this study, we estimate rice residue, associated burning emissions, and compare results with existing emissions inventories employing a bottom-up approach. We first estimated field-level post-harvest rice residues, including separate fuel-loading factors for rice straw and rice stubble. Results suggested fuel-loading factors of 0.27 kg m -2 (±0.033), 0.61 kg m -2 (±0.076), and 0.88 kg m -2 (±0.083) for rice straw, stubble, and total post-harvest biomass, respectively. Using these factors, we quantified potential emissions from rice residue burning and compared our estimates with other studies. Our results suggest total rice residue burning emissions as 2.24 Gg PM 2.5 , 36.54 Gg CO and 567.79 Gg CO 2 for Hanoi Province, which are significantly higher than earlier studies. We attribute our higher emission estimates to improved fuel-loading factors; moreover, we infer that some earlier studies relying on residue-to-product ratios could be underestimating rice residue emissions by more than a factor of 2.3 for Hanoi, Vietnam. Using the rice planted area data from the Vietnamese government, and combining our fuel-loading factors, we also estimated rice residue PM 2.5 emissions for the entirety of Vietnam and compared these estimates with an existing all-sources emissions inventory, and the Global Fire Emissions Database (GFED). Results suggest 75.98 Gg of PM 2.5 released from rice residue burning accounting for 12.8% of total emissions for Vietnam. The GFED database suggests 42.56 Gg PM 2.5 from biomass burning with 5.62 Gg attributed to agricultural waste burning indicating satellite-based methods may be significantly underestimating emissions. Our results not only provide improved residue and emission estimates, but also highlight the need for emissions mitigation from rice residue burning

Agriculture · Agronomy · Biology · Biomass burning · Crop residue · Geography · Greenhouse gas · Meteorology · Paddy field · Residue (chemistry · Rice straw · Straw · Atmospheric and Environmental Gas Dynamics · Atmospheric chemistry and aerosols · Chemistry · Environmental Science · Fire effects on ecosystems · Ecology

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