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

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

doi:10.1016/j.atmosenv.2021.118384

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

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

^*Corresponding author for this work

School of Geographic Sciences

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Static floating chambers (FCs) are the conventional method to measure CH₄ fluxes across the water-air interface in ponds, while thin boundary layer (TBL) modelling is increasingly used to estimate CH₄ fluxes. In this study, both FCs measurements and TBL models of gas transfer velocity were used to determine CH₄ evasion from aquaculture ponds in southeastern China. The surface water CH₄ concentrations ranged from 0.4 to 9.1 μmol L-1 with an average of 4.8 ± 0.8 μmol L-1. CH₄ flux was always positive, indicating the ponds as a persistent CH₄ source to air. Mean CH₄ flux based on different TBL models showed large variations, ranging between 19 and 316 μmol m⁻² h⁻¹. Compared against the direct measurement FCs, three TBL models developed for the open sea, flowing estuarine system and lentic ecosystem (TBL_W92a, TBL_RC01, and TBL_CL98, respectively) overestimated CH₄ emission by 40–200%, while the wind tunnel-based TBL model (TBL_LM86) underestimated CH₄ emission. Two TBL models developed for lakes (TBL_W92b and TBL_CW03) gave estimates similar to FCs.

Original language	English
Article number	118384
Journal	Atmospheric Environment
Volume	253
DOIs	https://doi.org/10.1016/j.atmosenv.2021.118384
State	Published - 15 May 2021

Keywords

Floating chambers
Methane fluxes
Shallow aquaculture pond
Subtropical estuary
Thin boundary layer models
Water-air interface

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10.1016/j.atmosenv.2021.118384

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title = "Diffusive CH4 fluxes from aquaculture ponds using floating chambers and thin boundary layer equations",

abstract = "Static floating chambers (FCs) are the conventional method to measure CH4 fluxes across the water-air interface in ponds, while thin boundary layer (TBL) modelling is increasingly used to estimate CH4 fluxes. In this study, both FCs measurements and TBL models of gas transfer velocity were used to determine CH4 evasion from aquaculture ponds in southeastern China. The surface water CH4 concentrations ranged from 0.4 to 9.1 μmol L-1 with an average of 4.8 ± 0.8 μmol L-1. CH4 flux was always positive, indicating the ponds as a persistent CH4 source to air. Mean CH4 flux based on different TBL models showed large variations, ranging between 19 and 316 μmol m−2 h−1. Compared against the direct measurement FCs, three TBL models developed for the open sea, flowing estuarine system and lentic ecosystem (TBLW92a, TBLRC01, and TBLCL98, respectively) overestimated CH4 emission by 40–200\%, while the wind tunnel-based TBL model (TBLLM86) underestimated CH4 emission. Two TBL models developed for lakes (TBLW92b and TBLCW03) gave estimates similar to FCs.",

keywords = "Floating chambers, Methane fluxes, Shallow aquaculture pond, Subtropical estuary, Thin boundary layer models, Water-air interface",

author = "Ping Yang and Jiafang Huang and Hong Yang and Josep Pe{\~n}uelas and Tang, \{Kam W.\} and Lai, \{Derrick Y.F.\} and Dongqi Wang and Qitao Xiao and Jordi Sardans and Yifei Zhang and Chuan Tong",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = may,

day = "15",

doi = "10.1016/j.atmosenv.2021.118384",

language = "英语",

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journal = "Atmospheric Environment",

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TY - JOUR

T1 - Diffusive CH4 fluxes from aquaculture ponds using floating chambers and thin boundary layer equations

AU - Yang, Ping

AU - Huang, Jiafang

AU - Yang, Hong

AU - Peñuelas, Josep

AU - Tang, Kam W.

AU - Lai, Derrick Y.F.

AU - Wang, Dongqi

AU - Xiao, Qitao

AU - Sardans, Jordi

AU - Zhang, Yifei

AU - Tong, Chuan

PY - 2021/5/15

Y1 - 2021/5/15

N2 - Static floating chambers (FCs) are the conventional method to measure CH4 fluxes across the water-air interface in ponds, while thin boundary layer (TBL) modelling is increasingly used to estimate CH4 fluxes. In this study, both FCs measurements and TBL models of gas transfer velocity were used to determine CH4 evasion from aquaculture ponds in southeastern China. The surface water CH4 concentrations ranged from 0.4 to 9.1 μmol L-1 with an average of 4.8 ± 0.8 μmol L-1. CH4 flux was always positive, indicating the ponds as a persistent CH4 source to air. Mean CH4 flux based on different TBL models showed large variations, ranging between 19 and 316 μmol m−2 h−1. Compared against the direct measurement FCs, three TBL models developed for the open sea, flowing estuarine system and lentic ecosystem (TBLW92a, TBLRC01, and TBLCL98, respectively) overestimated CH4 emission by 40–200%, while the wind tunnel-based TBL model (TBLLM86) underestimated CH4 emission. Two TBL models developed for lakes (TBLW92b and TBLCW03) gave estimates similar to FCs.

AB - Static floating chambers (FCs) are the conventional method to measure CH4 fluxes across the water-air interface in ponds, while thin boundary layer (TBL) modelling is increasingly used to estimate CH4 fluxes. In this study, both FCs measurements and TBL models of gas transfer velocity were used to determine CH4 evasion from aquaculture ponds in southeastern China. The surface water CH4 concentrations ranged from 0.4 to 9.1 μmol L-1 with an average of 4.8 ± 0.8 μmol L-1. CH4 flux was always positive, indicating the ponds as a persistent CH4 source to air. Mean CH4 flux based on different TBL models showed large variations, ranging between 19 and 316 μmol m−2 h−1. Compared against the direct measurement FCs, three TBL models developed for the open sea, flowing estuarine system and lentic ecosystem (TBLW92a, TBLRC01, and TBLCL98, respectively) overestimated CH4 emission by 40–200%, while the wind tunnel-based TBL model (TBLLM86) underestimated CH4 emission. Two TBL models developed for lakes (TBLW92b and TBLCW03) gave estimates similar to FCs.

KW - Floating chambers

KW - Methane fluxes

KW - Shallow aquaculture pond

KW - Subtropical estuary

KW - Thin boundary layer models

KW - Water-air interface

UR - https://www.scopus.com/pages/publications/85103711271

U2 - 10.1016/j.atmosenv.2021.118384

DO - 10.1016/j.atmosenv.2021.118384

M3 - 文章

AN - SCOPUS:85103711271

SN - 1352-2310

VL - 253

JO - Atmospheric Environment

JF - Atmospheric Environment

M1 - 118384

ER -

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

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