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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, 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

  • Accepted Manuscript under embargo until: 2nd April 2022

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
Online Access: Check full text

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: College of Science
Start Page: 118384