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Sea-Air Exchange of...
Sea-Air Exchange of Methane in Shallow Inshore Areas of the Baltic Sea
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- Lundevall-Zara, Maysoon (författare)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Research School for Teachers Focusing on Climate and Environment, Sweden
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Lundevall-Zara, Erik (författare)
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- Brüchert, Volker, 1965- (författare)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Research School for Teachers Focusing on Climate and Environment, Sweden
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(creator_code:org_t)
- 2021-08-12
- 2021
- Engelska.
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Ingår i: Frontiers in Marine Science. - : Frontiers Media SA. - 2296-7745. ; 8
- Relaterad länk:
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https://doi.org/10.3...
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https://su.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We report sea-air fluxes of methane in physically and biologically distinct inshore habitats of the Baltic Sea with the goal to establish empirical relationships that allow upscaling of local site-specific flux measurements. Flux measurements were conducted using floating chambers with and without bubble shields, and by using a boundary layer gas transfer model before, during, and after an annually occurring algal bloom from June to October 2019. Water and air temperature, salinity, wind, sediment organic content, and organic content of floating algal biomass were found to successfully discriminate the different habitats in terms of methane flux, both over periods of days and over a season. Multivariate statistical analysis was used to establish the relative environmental forcing of methane emissions over one growth season for each flux method. Floating algal biomass carbon and sediment organic content were identified as the most important controlling factors for methane emissions based on flux chamber measurements over a period of days to weeks, whereas water and air temperature and wind velocity were the most important factors based on the gas transfer model on these time scales. Over the season, water and air temperature were the most important controlling factors with both methods. We present a first attempt how our observations can be extrapolated to determine the coastal methane emission along the coastline.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
Nyckelord
- Baltic Sea
- methane
- costal habitats
- environmental forcing factors
- gas transfer model
- floating chamber
- shallow inshore areas
- trace gases
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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