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Replication Data for: River Winds and Transport of Forest Volatiles in the Amazonian Riparian Ecoregion

Harvard Dataverse (Africa Rice Center, Bioversity International, CCAFS, CIAT, IFPRI, IRRI and WorldFish)

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Title Replication Data for: River Winds and Transport of Forest Volatiles in the Amazonian Riparian Ecoregion
 
Identifier https://doi.org/10.7910/DVN/X2DAYO
 
Creator Ye, Jianhuai
Batista, Carla
Zhao, Tianning
Campos, Jesus
Ma, Yongjing
Guimarães, Patricia
Ribeiro, Igor
Medeiros, Adan
Stewart, Matthew
Vilà-Guerau de Arellano, Jordi
Guenther, Alex
Souza, Rodrigo
Martin, Scot
 
Publisher Harvard Dataverse
 
Description 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, ⍺-pinene, and β-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, 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 highlights the need for improved representation of these processes in regional models of air quality and chemistry-climate coupling.
 
Subject Earth and Environmental Sciences
 
Contributor Ye, Jianhuai