Global observation gaps of peatland greenhouse gas balances: Needs and obstacles

Zhao Junbin, Weldon Simon, Barthelmes Alexandra, Swails Erin, Hergoualc'H Kristell Anaïk, Mander Ulo, Qiu Chunfang, Connolly John, Silver Whendee L., Campbell David I.. 2023. Global observation gaps of peatland greenhouse gas balances: Needs and obstacles. Biogeochemistry, 16 p.

Url - jeu de données - Entrepôt autre : https://doi.org/10.5281/zenodo.8424351

Résumé : Greenhouse gas (GHGs) emissions from peatlands contribute significantly to ongoing climate change because of human land use. To develop reliable and comprehensive estimates and predictions of GHG emissions from peatlands, it is necessary to have GHG observations, including carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), that cover different peatland types globally. We synthesize published peatland studies with field GHG flux measurements to identify gaps in observations and suggest directions for future research. Although GHG flux measurements have been conducted at numerous sites globally, substantial gaps remain in current observations, encompassing various peatland types, regions and GHGs. Generally, there is a pressing need for additional GHG observations in Africa, Latin America and the Caribbean regions. Despite widespread measurements of CO2 and CH4, studies quantifying N2O emissions from peatlands are scarce, particularly in natural ecosystems. To expand the global coverage of peatland data, it is crucial to conduct more eddy covariance observations for long-term monitoring. Automated chambers are preferable for plot-scale observations to produce high temporal resolution data; however, traditional field campaigns with manual chamber measurements remain necessary, particularly in remote areas. To ensure that the data can be further used for modeling purposes, we suggest that chamber campaigns should be conducted at least monthly for a minimum duration of one year with no fewer than three replicates and measure key environmental variables. In addition, further studies are needed in restored peatlands, focusing on identifying the most effective restoration approaches for different ecosystem types, conditions, climates, and land use histories.

Mots-clés Agrovoc : utilisation des terres, changement climatique, télédétection, tourbière, dioxyde de carbone, écosystème, instrument de mesure, mesure (activité), distribution géographique, gaz à effet de serre

Mots-clés géographiques Agrovoc : Chine, Amérique latine

Mots-clés libres : CO2, CH4, N2O, Eddy covariance, Chamber, Land use

Classification Agris : P40 - Météorologie et climatologie
P02 - Pollution

Champ stratégique Cirad : CTS 6 (2019-) - Changement climatique

Agences de financement européennes : European Research Council

Agences de financement hors UE : Norwegian Research Council, Estonian Research Council, Governments of the United States of America, Government of the Norway

Auteurs et affiliations

• Zhao Junbin, NIBIO (NOR) - auteur correspondant
• Weldon Simon, Norwegian Institute for Bioeconomy Research (NOR)
• Barthelmes Alexandra, University of Greifswald (DEU)
• Swails Erin, CIFOR (IDN)
• Hergoualc'H Kristell Anaïk, CIRAD-PERSYST-UMR Eco&Sols (FRA)
• Mander Ulo, University of Tartu (EST)
• Qiu Chunfang, Swedish Medical Center (USA)
• Connolly John, Trinity College Dublin (IRL)
• Silver Whendee L., UC (USA)
• Campbell David I., University of Waikato (NZL)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/606687/)

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