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Continuous long-ter...
Continuous long-term observations of the carbonate system dynamics in the water column of a temperate fjord
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- Atamanchuk, Dariia, 1987 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg
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- Kononets, Mikhail Y, 1978 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg
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Thomas, P. J. (författare)
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Hovdenes, J. (författare)
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- Tengberg, Anders, 1962 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg
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- Hall, Per, 1954 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg
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(creator_code:org_t)
- Elsevier BV, 2015
- 2015
- Engelska.
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Ingår i: Journal of Marine Systems. - : Elsevier BV. - 0924-7963. ; 148, s. 272-284
- Relaterad länk:
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http://dx.doi.org/10...
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A cabled underwater observatory with more than 30 sensors delivering data in real-time was used to study the dynamics of the upper pelagic carbonate system of the Koljo Fjord, western Sweden, from September to April during two consecutive years (2011-2012 and 2012-2013). In the dynamic upper ca 15 m of the water column, salinity and temperature varied by up to 10 and 20 degrees C throughout the recorded periods, respectively. Partial pressure of CO2 (pCO(2)), measured with newly developed optical sensors (optodes) at three water depths (5, 9.6 and 12.6 m), varied between 210-940 mu atm, while O-2 varied between 80-470 mu mol/L. Redfield scaled graphs (Delta O-2:Delta DIC = -1.30), in which DIC was derived from pH or pCO(2) and salinity-derived alkalinity (A(Tsal)), and oxygen was measured by the sensors, were used as a tool to assess timing and occurrence of different processes influencing the dynamics of these parameters. Distinctive short-term variations of pCO(2) and O-2 were induced by either tidal oscillations, wind-driven water mass transport in the mixed layer or occasional transport of deep-basin water from below the thermo/halodine to the surface layer. Intensified air-sea gas exchange during short storm events was usually followed by stabilization of gas-related parameters in the water column, such as O-2 concentration and pCO(2), on longer time-scales characteristic for each parameter. Biological processes including organic matter degradation in late summer/autumn and primary production in early spring were responsible for slower and gradual seasonal changes of pCO(2) and O-2. Net primary production (NPP) rates in the Koljo Fjord were quantified to be 1.79 and 2.10 g C m(-2) during the spring bloom periods in 2012 and 2013, respectively, and ratios of 02 production:DIC consumption during the same periods were estimated to be -1.21 +/- 0.02 (at 5 m depth in 2013), -1.51 +/- 0.02 (at 12.6 m in 2012) and -1.95 +/- 0.05 (at 9.6 m in 2013). These ratios are discussed and compared to previously reported 02:C ratios during primary production. (C) 2015 Elsevier B.V. All rights reserved.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Nyckelord
- Carbonate system of seawater
- Long-term in situ measurements
- pCO(2)
- Redfield ratio
- NPP rates
- TOTAL INORGANIC CARBON
- LIFETIME-BASED OPTODE
- CORE WAVE-GUIDE
- BALTIC
- SEA
- DISSOCIATION-CONSTANTS
- PARTIAL-PRESSURE
- PROFILING FLOAT
- ORGANIC-MATTER
- TIME-SERIES
- NORTH-SEA
- Geosciences
- Multidisciplinary
- Marine & Freshwater Biology
- Oceanography
- IGEBRANDT A
- 1991
- LIMNOLOGY AND OCEANOGRAPHY
- V36
- P444
- GRANDPRE MD
- 1995
- LIMNOLOGY AND OCEANOGRAPHY
- V40
- P969
- Marine & Freshwater Biology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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