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Environ Sci Technol

Title:		River Winds and Transport of Forest Volatiles in the Amazonian Riparian Ecoregion
Author(s):		Ye J; Batista CE; Zhao T; Campos J; Ma Y; Guimaraes P; Ribeiro IO; Medeiros ASS; Stewart MP; Vila-Guerau de Arellano J; Guenther AB; Souza RAF; Martin ST;
Address:		"School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States. School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China. School of Technology, Amazonas State University, Manaus, Amazonas 69065-020, Brazil. Post-Graduate Program in Climate and Environment, National Institute of Amazonian Research, Manaus, Amazonas 69060-001, Brazil. Department of Earth System Science, University of California, Irvine, Irvine, California 92697, United States. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China. Meteorology and Air Quality Section, Wageningen University, Wageningen 6708 PB, The Netherlands. Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, United States"
Journal Title:		Environ Sci Technol
Year:		2022
Volume:		20220601
Issue:		17
Page Number:		12667 - 12677
DOI:		10.1021/acs.est.1c08460
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"Volatile organic compounds (VOCs) emitted from forests are important chemical components that affect ecosystem functioning, atmospheric chemistry, and regional climate. Temperature differences between a forest and an adjacent river can induce winds that influence VOC fate and transport. Quantitative observations and scientific understanding, however, remain lacking. Herein, daytime VOC datasets were collected from the surface up to 500 m over the 'Rio Negro' river in Amazonia. During time periods of river winds, isoprene, alpha-pinene, and beta-pinene concentrations increased by 50, 60, and 80% over the river, respectively. The concentrations at 500 m were up to 80% greater compared to those at 100 m because of the transport path of river winds. By comparison, the concentration of methacrolein, a VOC oxidation product, did not depend on river winds or height. The differing observations for primary emissions and oxidation products can be explained by the coupling of timescales among emission, reaction, and transport. This behavior was captured in large-eddy simulations with a coupled chemistry model. The observed and simulated roles of river winds in VOC fate and transport highlight the need for improved representation of these processes in regional models of air quality and chemistry-climate coupling"
Keywords:		*Air Pollutants/analysis Ecosystem Forests Rivers *Volatile Organic Compounds Wind Amazon tropical forest riparian ecoregion river wind unmanned aerial vehicle volatile organic compounds;
Notes:		"MedlineYe, Jianhuai Batista, Carla E Zhao, Tianning Campos, Jesus Ma, Yongjing Guimaraes, Patricia Ribeiro, Igor O Medeiros, Adan S S Stewart, Matthew P Vila-Guerau de Arellano, Jordi Guenther, Alex B Souza, Rodrigo Augusto Ferreira de Martin, Scot T eng Research Support, Non-U.S. Gov't 2022/06/02 Environ Sci Technol. 2022 Sep 6; 56(17):12667-12677. doi: 10.1021/acs.est.1c08460. Epub 2022 Jun 1"