Persistent hot spots of CO2 and CH4 in coastal nearshore environments
Abstract Nearshore environments are typically supersaturated with the potent greenhouse gases methane and carbon dioxide, due to intense remineralization of the elevated supply of organic carbon in these systems. These environments are characterized by overlapping biogeochemical gradients and hetero...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wiley
2024-04-01
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| Series: | Limnology and Oceanography Letters |
| Online Access: | https://doi.org/10.1002/lol2.10370 |
| _version_ | 1797258493374234624 |
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| author | Eero Asmala Matias Scheinin |
| author_facet | Eero Asmala Matias Scheinin |
| author_sort | Eero Asmala |
| collection | DOAJ |
| description | Abstract Nearshore environments are typically supersaturated with the potent greenhouse gases methane and carbon dioxide, due to intense remineralization of the elevated supply of organic carbon in these systems. These environments are characterized by overlapping biogeochemical gradients and heterogeneous morphology, and the overall spatial variability in nearshore greenhouse gas concentrations remains unclear. We measured surface water partial pressures of carbon dioxide and methane synoptically with water quality parameters in the coastal Baltic Sea, covering two ice‐free seasons. The high‐frequency flow‐through data revealed sites with recurring very high partial pressures of carbon dioxide and methane (i.e., hot spots) scattered around the 50 km × 40 km study area, exceeding overall partial pressure averages by 455 μatm (CH4) and 2396 μatm (CO2). High partial pressures were linked with elevated inputs of allochthonous and autochthonous organic matter, underpinning the major role of organic enrichment of coastal environments in global carbon cycling. |
| first_indexed | 2024-04-24T22:54:25Z |
| format | Article |
| id | doaj.art-10c002ec5d974e8281fe4e2deafd8328 |
| institution | Directory Open Access Journal |
| issn | 2378-2242 |
| language | English |
| last_indexed | 2024-04-24T22:54:25Z |
| publishDate | 2024-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Limnology and Oceanography Letters |
| spelling | doaj.art-10c002ec5d974e8281fe4e2deafd83282024-03-18T07:59:57ZengWileyLimnology and Oceanography Letters2378-22422024-04-019211912710.1002/lol2.10370Persistent hot spots of CO2 and CH4 in coastal nearshore environmentsEero Asmala0Matias Scheinin1Geological Survey of Finland (GTK) Espoo FinlandDepartment of Environmental Protection City of Hanko Hanko FinlandAbstract Nearshore environments are typically supersaturated with the potent greenhouse gases methane and carbon dioxide, due to intense remineralization of the elevated supply of organic carbon in these systems. These environments are characterized by overlapping biogeochemical gradients and heterogeneous morphology, and the overall spatial variability in nearshore greenhouse gas concentrations remains unclear. We measured surface water partial pressures of carbon dioxide and methane synoptically with water quality parameters in the coastal Baltic Sea, covering two ice‐free seasons. The high‐frequency flow‐through data revealed sites with recurring very high partial pressures of carbon dioxide and methane (i.e., hot spots) scattered around the 50 km × 40 km study area, exceeding overall partial pressure averages by 455 μatm (CH4) and 2396 μatm (CO2). High partial pressures were linked with elevated inputs of allochthonous and autochthonous organic matter, underpinning the major role of organic enrichment of coastal environments in global carbon cycling.https://doi.org/10.1002/lol2.10370 |
| spellingShingle | Eero Asmala Matias Scheinin Persistent hot spots of CO2 and CH4 in coastal nearshore environments Limnology and Oceanography Letters |
| title | Persistent hot spots of CO2 and CH4 in coastal nearshore environments |
| title_full | Persistent hot spots of CO2 and CH4 in coastal nearshore environments |
| title_fullStr | Persistent hot spots of CO2 and CH4 in coastal nearshore environments |
| title_full_unstemmed | Persistent hot spots of CO2 and CH4 in coastal nearshore environments |
| title_short | Persistent hot spots of CO2 and CH4 in coastal nearshore environments |
| title_sort | persistent hot spots of co2 and ch4 in coastal nearshore environments |
| url | https://doi.org/10.1002/lol2.10370 |
| work_keys_str_mv | AT eeroasmala persistenthotspotsofco2andch4incoastalnearshoreenvironments AT matiasscheinin persistenthotspotsofco2andch4incoastalnearshoreenvironments |