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Higher apparent gas...
Higher apparent gas transfer velocities for CO2 compared to CH4 in small lakes
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- Pajala, Gustav (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Rudberg, David (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Gålfalk, Magnus (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Melack, John Michael (author)
- Department of Ecology, Evolution and Marine Biology, University of California, UCEN Rd, Santa Barbara, California, United States; Earth Research Institute, University of California, Lagoon Rd, Santa Barbara, California, United States,Univ Calif Santa Barbara, CA 93117 USA; Univ Calif Santa Barbara, CA 93106 USA
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- Macintyre, Sally (author)
- Department of Ecology, Evolution and Marine Biology, University of California, UCEN Rd, Santa Barbara, California, United States; Earth Research Institute, University of California, Lagoon Rd, Santa Barbara, California, United States; Marine Science Institute, University of California, Isla Vista, Santa Barbara, California, United States,Univ Calif Santa Barbara, CA 93117 USA; Univ Calif Santa Barbara, CA 93106 USA; Univ Calif Santa Barbara, CA 93117 USA
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- Karlsson, Jan, 1974- (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Umea Univ, Sweden
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- Sawakuchi, Henrique (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Schenk, Jonathan (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Sieczko, Anna (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Sundgren, Ingrid (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Nguyen, Thanh Duc (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Bastviken, David (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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(creator_code:org_t)
- American Chemical Society (ACS), 2023
- 2023
- English.
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In: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 57:23, s. 8578-8587
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Abstract
Subject headings
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- Large greenhouse gas emissions occur via the release of carbon dioxide (CO2) and methane (CH4) from the surface layer of lakes. Such emissions are modeled from the air-water gas concentration gradient and the gas transfer velocity (k). The links between k and the physical properties of the gas and water have led to the development of methods to convert k between gases through Schmidt number normalization. However, recent observations have found that such normalization of apparent k estimates from field measurements can yield different results for CH4 and CO2. We estimated k for CO2 and CH4 from measurements of concentration gradients and fluxes in four contrasting lakes and found consistently higher (on an average 1.7 times) normalized apparent k values for CO2 than CH4. From these results, we infer that several gas-specific factors, including chemical and biological processes within the water surface microlayer, can influence apparent k estimates. We highlight the importance of accurately measuring relevant air-water gas concentration gradients and considering gas-specific processes when estimating k.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- carbon dioxide
- gas transfer
- greenhouse gas
- lake
- methane
- piston velocity
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Pajala, Gustav
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Rudberg, David
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Gålfalk, Magnus
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Melack, John Mic ...
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Macintyre, Sally
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Karlsson, Jan, 1 ...
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show more...
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Sawakuchi, Henri ...
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Schenk, Jonathan
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Sieczko, Anna
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Sundgren, Ingrid
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Nguyen, Thanh Du ...
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Bastviken, David
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Climate Research
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Environmental Sc ...
- Articles in the publication
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Environmental Sc ...
- By the university
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Umeå University
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Linköping University