Cover Image

Reducing bias on soil surface CO2 flux emission measurements: Case study on a mature oil palm (Elaeis guineensis) plantation on tropical peatland in Southeast Asia

Large-scale conversion of tropical peat swamp forests to agricultural plantations has resulted in substantial carbon dioxide (CO2) emissions. Despite consensus on the importance of these emissions, the cause of the large range in the magnitudes of reported values remains uncertain. Differences in re...

Full description

Saved in:
Bibliographic Details
Main Authors: Basri, Mohd Hadi Akbar, McCalmont, Jon, Kho, Lip Khoon, Hartley, Iain P., Teh, Yit Arn, Rumpang, Elisa, Signori-Müller, Caroline, Hill, Tim
Format: Article
Language:English
Published: Elsevier 2024
Online Access:http://psasir.upm.edu.my/id/eprint/112751/1/112751.pdf
http://psasir.upm.edu.my/id/eprint/112751/
https://linkinghub.elsevier.com/retrieve/pii/S0168192324001175
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.upm.eprints.112751
record_format eprints
spelling my.upm.eprints.1127512024-11-14T04:05:24Z http://psasir.upm.edu.my/id/eprint/112751/ Reducing bias on soil surface CO2 flux emission measurements: Case study on a mature oil palm (Elaeis guineensis) plantation on tropical peatland in Southeast Asia Basri, Mohd Hadi Akbar McCalmont, Jon Kho, Lip Khoon Hartley, Iain P. Teh, Yit Arn Rumpang, Elisa Signori-Müller, Caroline Hill, Tim Large-scale conversion of tropical peat swamp forests to agricultural plantations has resulted in substantial carbon dioxide (CO2) emissions. Despite consensus on the importance of these emissions, the cause of the large range in the magnitudes of reported values remains uncertain. Differences in reported fluxes might result from site specific factors and/or potential limitations of the manual flux chambers commonly used. It is important that any biases at the site level are explored as they ultimately affect regional and global emission estimates. Therefore, the aim of this study is to determine if measurement timing of commonly used infrequent manual chamber measurements leads to biased emission estimates. In this study we make use of six months of automated chamber data to provide a semi-continuous timeseries. This timeseries is used to explore the potential for time-of-day sampling biases in infrequent, monthly manual chambers measurements in a peatland oil palm plantation in Malaysian Borneo. Fluxes from Palm Base, Harvest Path, Frond Pile, Drain and Inter row microforms were recorded hourly using automatic chambers. From these hourly data, mean diurnal patterns of fluxes were produced. These diurnal patterns were used to characterize the biases in a larger, monthly flux manual chamber dataset. This monthly manual dataset was collected over six years at the same site and microforms, with individual measurements made in the daytime. Bias range was widest for Harvest Path (-18 to 24 %), followed by Palm Base (-13 to 11 %), Drain (-10 to 9 %) and Frond Pile (-5 to 3 %). Estimates of annual plantation scale emission over six years, corrected for sampling bias ranged from 36 – 53 Mg CO2 ha−1 yr−1. We recommend careful consideration of artefacts sample timing might introduce in any sampling design, and where possible fluxes should be corrected with measured diurnals for each microform considered. Elsevier 2024 Article PeerReviewed text en cc_by_4 http://psasir.upm.edu.my/id/eprint/112751/1/112751.pdf Basri, Mohd Hadi Akbar and McCalmont, Jon and Kho, Lip Khoon and Hartley, Iain P. and Teh, Yit Arn and Rumpang, Elisa and Signori-Müller, Caroline and Hill, Tim (2024) Reducing bias on soil surface CO2 flux emission measurements: Case study on a mature oil palm (Elaeis guineensis) plantation on tropical peatland in Southeast Asia. Agricultural and Forest Meteorology, 350. art. no. 110002. pp. 1-13. ISSN 0168-1923; eISSN: 0168-1923 https://linkinghub.elsevier.com/retrieve/pii/S0168192324001175 10.1016/j.agrformet.2024.110002
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Large-scale conversion of tropical peat swamp forests to agricultural plantations has resulted in substantial carbon dioxide (CO2) emissions. Despite consensus on the importance of these emissions, the cause of the large range in the magnitudes of reported values remains uncertain. Differences in reported fluxes might result from site specific factors and/or potential limitations of the manual flux chambers commonly used. It is important that any biases at the site level are explored as they ultimately affect regional and global emission estimates. Therefore, the aim of this study is to determine if measurement timing of commonly used infrequent manual chamber measurements leads to biased emission estimates. In this study we make use of six months of automated chamber data to provide a semi-continuous timeseries. This timeseries is used to explore the potential for time-of-day sampling biases in infrequent, monthly manual chambers measurements in a peatland oil palm plantation in Malaysian Borneo. Fluxes from Palm Base, Harvest Path, Frond Pile, Drain and Inter row microforms were recorded hourly using automatic chambers. From these hourly data, mean diurnal patterns of fluxes were produced. These diurnal patterns were used to characterize the biases in a larger, monthly flux manual chamber dataset. This monthly manual dataset was collected over six years at the same site and microforms, with individual measurements made in the daytime. Bias range was widest for Harvest Path (-18 to 24 %), followed by Palm Base (-13 to 11 %), Drain (-10 to 9 %) and Frond Pile (-5 to 3 %). Estimates of annual plantation scale emission over six years, corrected for sampling bias ranged from 36 – 53 Mg CO2 ha−1 yr−1. We recommend careful consideration of artefacts sample timing might introduce in any sampling design, and where possible fluxes should be corrected with measured diurnals for each microform considered.
format Article
author Basri, Mohd Hadi Akbar
McCalmont, Jon
Kho, Lip Khoon
Hartley, Iain P.
Teh, Yit Arn
Rumpang, Elisa
Signori-Müller, Caroline
Hill, Tim
spellingShingle Basri, Mohd Hadi Akbar
McCalmont, Jon
Kho, Lip Khoon
Hartley, Iain P.
Teh, Yit Arn
Rumpang, Elisa
Signori-Müller, Caroline
Hill, Tim
Reducing bias on soil surface CO2 flux emission measurements: Case study on a mature oil palm (Elaeis guineensis) plantation on tropical peatland in Southeast Asia
author_facet Basri, Mohd Hadi Akbar
McCalmont, Jon
Kho, Lip Khoon
Hartley, Iain P.
Teh, Yit Arn
Rumpang, Elisa
Signori-Müller, Caroline
Hill, Tim
author_sort Basri, Mohd Hadi Akbar
title Reducing bias on soil surface CO2 flux emission measurements: Case study on a mature oil palm (Elaeis guineensis) plantation on tropical peatland in Southeast Asia
title_short Reducing bias on soil surface CO2 flux emission measurements: Case study on a mature oil palm (Elaeis guineensis) plantation on tropical peatland in Southeast Asia
title_full Reducing bias on soil surface CO2 flux emission measurements: Case study on a mature oil palm (Elaeis guineensis) plantation on tropical peatland in Southeast Asia
title_fullStr Reducing bias on soil surface CO2 flux emission measurements: Case study on a mature oil palm (Elaeis guineensis) plantation on tropical peatland in Southeast Asia
title_full_unstemmed Reducing bias on soil surface CO2 flux emission measurements: Case study on a mature oil palm (Elaeis guineensis) plantation on tropical peatland in Southeast Asia
title_sort reducing bias on soil surface co2 flux emission measurements: case study on a mature oil palm (elaeis guineensis) plantation on tropical peatland in southeast asia
publisher Elsevier
publishDate 2024
url http://psasir.upm.edu.my/id/eprint/112751/1/112751.pdf
http://psasir.upm.edu.my/id/eprint/112751/
https://linkinghub.elsevier.com/retrieve/pii/S0168192324001175
_version_ 1816132712213250048
score 13.244413

Similar Items