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However, the efficacy of raised water table level (WTL) in Arctic\/subarctic regions, characterized by continuous summer daylight, low temperatures and short growing seasons, remains poorly understood. This study presents a two\u2010year field experiment conducted at a northernmost cultivated peatland site in Norway. We used sub\u2010daily CO\n                    <jats:sub>2<\/jats:sub>\n                    , CH\n                    <jats:sub>4<\/jats:sub>\n                    , and N\n                    <jats:sub>2<\/jats:sub>\n                    O fluxes measured by automatic chambers to assess the impact of WTL, fertilization, and biomass harvesting on greenhouse gas (GHG) budgets and carbon balance. Well\u2010drained plots acted as GHG sources as substantial as those in temperate regions. Maintaining a WTL between \u22120.5 and \u22120.25\u2009m effectively reduces CO\n                    <jats:sub>2<\/jats:sub>\n                    emissions, without significant CH\n                    <jats:sub>4<\/jats:sub>\n                    and N\n                    <jats:sub>2<\/jats:sub>\n                    O emissions, and can even result in a net GHG sink. Elevated temperatures, however, were found to increase CO\n                    <jats:sub>2<\/jats:sub>\n                    emissions, potentially attenuating the benefits of water level elevation. Notably, high WTL resulted in a greater suppression of maximum photosynthetic CO\n                    <jats:sub>2<\/jats:sub>\n                    uptake compared to respiration, and, yet caused lower net CO\n                    <jats:sub>2<\/jats:sub>\n                    emissions due to a low light compensation point that lengthens the net CO\n                    <jats:sub>2<\/jats:sub>\n                    uptake periods. Furthermore, the long summer photoperiod in the Arctic also enhanced net CO\n                    <jats:sub>2<\/jats:sub>\n                    uptake and, thus, the efficacy of CO\n                    <jats:sub>2<\/jats:sub>\n                    mitigation. Fertilization primarily enhanced biomass production without substantially affecting CO\n                    <jats:sub>2<\/jats:sub>\n                    or CH\n                    <jats:sub>4<\/jats:sub>\n                    emissions. Conversely, biomass harvesting led to a significant carbon depletion, even at a high WTL, indicating a risk of land degradation. These results suggest that while elevated WTL can effectively mitigate GHG emissions from cultivated peatlands, careful management of WTL, fertilization, and harvesting is crucial to balance GHG reduction with sustained agricultural productivity and long\u2010term carbon storage. The observed compatibility of GHG reduction and sustained grass productivity highlights the potential for future paludiculture implementation in the Arctic.\n                  <\/jats:p>","DOI":"10.1111\/gcb.70599","type":"journal-article","created":{"date-parts":[[2025,11,10]],"date-time":"2025-11-10T12:05:08Z","timestamp":1762776308000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Substantial Mitigation Potential for Greenhouse Gases Under High Water Levels in a Cultivated Peatland in the Arctic"],"prefix":"10.1111","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5142-4901","authenticated-orcid":false,"given":"Junbin","family":"Zhao","sequence":"first","affiliation":[{"name":"Division of Environment and Natural Resources Norwegian Institute of Bioeconomy Research  \u00c5s Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8238-2484","authenticated-orcid":false,"given":"Cornelya F. C.","family":"Kl\u00fctsch","sequence":"additional","affiliation":[{"name":"Division of Environment and Natural Resources Norwegian Institute of Bioeconomy Research  \u00c5s Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7130-2378","authenticated-orcid":false,"given":"Hanna","family":"Silvennoinen","sequence":"additional","affiliation":[{"name":"Department of Terrestrial Biodiversity Norwegian Institute for Nature Research  \u00c5s Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carla","family":"Stadler","sequence":"additional","affiliation":[{"name":"Centro de Investigaciones en F\u00edsica e Ingenier\u00eda del Centro de la Provincia de Buenos Aires  Tandil Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Kniha","sequence":"additional","affiliation":[{"name":"Division of Environment and Natural Resources Norwegian Institute of Bioeconomy Research  \u00c5s Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Runar","family":"Kj\u00e6r","sequence":"additional","affiliation":[{"name":"Division of Environment and Natural Resources Norwegian Institute of Bioeconomy Research  \u00c5s Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Svein","family":"Wara","sequence":"additional","affiliation":[{"name":"Division of Environment and Natural Resources Norwegian Institute of Bioeconomy Research  \u00c5s Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5543-0302","authenticated-orcid":false,"given":"Mikhail","family":"Mastepanov","sequence":"additional","affiliation":[{"name":"Division of Environment and Natural Resources Norwegian Institute of Bioeconomy Research  \u00c5s Norway"},{"name":"Department of Ecoscience, Arctic Research Centre Aarhus University  Roskilde Denmark"},{"name":"Oulanka Research Station Oulu University  Kuusamo Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,11,10]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/ece3.2469"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/gcb.15802"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467\u2010023\u201037391\u20102"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.18637\/jss.v067.i01"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/jpln.201300396"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.5194\/bg\u201019\u20105707\u20102022"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/0038\u20100717(92)90058\u20106"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10750\u2010011\u20100729\u2010x"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11027\u2010023\u201010046\u20109"},{"key":"e_1_2_9_11_1","unstructured":"Elzhov T. 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