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Diffusive CH4 fluxes from aquaculture ponds using floating chambers and thin boundary layer equations

Ping Yang, Jiafang Huang, Hong Yang, Josep Peñuelas, Kam Tang Orcid Logo, Derrick Y.F. Lai, Dongqi Wang, Qitao Xiao, Jordi Sardans, Yifei Zhang, Chuan Tong

Atmospheric Environment, Volume: 253, Start page: 118384

Swansea University Author: Kam Tang Orcid Logo

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DOI (Published version): 10.1016/j.atmosenv.2021.118384

Abstract

Static floating chambers (FCs) and thin boundary layer (TBL) modelling were compared for estimating CH4 fluxes across the water-air interface in aquaculture ponds in southeastern China. The surface water CH4 concentrations ranged from 0.4 to 9.1 μmol L-1 and averaged 4.8 ± 0.8 μmol L-1. The ponds we...

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Published in: Atmospheric Environment
ISSN: 1352-2310
Published: Elsevier BV 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa56626
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Abstract: Static floating chambers (FCs) and thin boundary layer (TBL) modelling were compared for estimating CH4 fluxes across the water-air interface in aquaculture ponds in southeastern China. The surface water CH4 concentrations ranged from 0.4 to 9.1 μmol L-1 and averaged 4.8 ± 0.8 μmol L-1. The ponds were a persistent source of CH4 to the atmosphere. Mean CH4 flux based on different TBL models was highly variable and ranging between 19 and316 μmol m-2 h-1. Compared against FCs, three TBL models developed for the open sea, flowing estuarine system and lentic ecosystem overestimated CH4 emission by 40–200%, while the wind tunnel-based TBL model underestimated CH4 emission. Two TBL models developed for lakes gave estimates similar to FCs.
Keywords: Methane fluxes; Thin boundary layer models; Floating chambers; Water-air interface; Shallow aquaculture pond; Subtropical estuary
College: Faculty of Science and Engineering
Start Page: 118384

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