Assessment of primary production in the White Sea

Berger, Vérane; Примаков, И. М.

doi:10.1134/s1063074007010051

Cited by 10 publications

(5 citation statements)

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“…Anderson et al (2011) computed the ESS annual PP based on consumption of dissolved inorganic carbon and evaluated its magnitude to about 1 mol C m −2 or 6×10 12 g C if integrated over half of the ESS area. Other estimations of the ESS annual PP are between 10-15×10 12 g C (Vinogradov et al, 2000;Vetrov and Romankevich, 2004;Berger and Primakov, 2007). Maximal value of total PP in the ESS was estimated to 45×10 12 g C (Sakshaug, 2004), but the latter number is highly uncertain as it is calculated by extrapolation of data from the high-productive surrounding shelf seas.…”

Section: Discussionmentioning

confidence: 99%

Interannual variability of air-sea CO2 fluxes and carbonate system parameters in the East Siberian Sea

Pipko¹,

Semiletov²,

Pugach³

et al. 2011

Preprint

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Over the past couple of decades it has become apparent that air-land-sea interactions in the Arctic have a substantial impact on the composition of the overlying atmosphere (ACIA, 2004). The Arctic Ocean is small (only ~4% of the total World Ocean), but it is surrounded by offshore and onshore permafrost which thaws at increasing rates under warming conditions releasing carbon dioxide (CO₂) into the water and atmosphere. This work summarizes data collected from three expeditions in the coastal-shelf zone of the East Siberian Sea (ESS) in September 2003, 2004 and late August–September 2008. It is proposed that the western part of the ESS represents a river- and coastal erosion-dominated ocean margin that is a source for atmospheric CO₂. It receives substantial river discharge that also adds organic matter, both dissolved and particulate. This in combination with significant input of organic matter from coastal erosion makes this region being of dominantly heterotrophic character. The eastern part of the ESS is a Pacific water-dominated autotrophic area. It's a high-productive zone, which acts as a sink for atmospheric CO₂. The year to year dynamics of partial pressure of CO₂ in the surface water as well as the sea-air flux of CO₂ varied substantially. In some years the ESS shelf can be mainly heterotrophic and serve as strong source of CO₂ (year 2004). Another year significant part of the ESS, where gross primary production exceeds community respiration, acts as a sink for the atmospheric CO₂ and the net CO₂ flux into the atmosphere is weak (year 2008). High variability of carbon system parameters observed in the ESS shelf is determined by many factors such as riverine runoff, advection of waters from adjacent seas, coastal erosion, primary production/respiration etc. The dynamics of the CO₂ sea-air exchange is determined by ocean processes but also by atmospheric circulation which hence has a significant impact on the CO₂ sea-air exchange. In this contribution the sea-air CO₂ fluxes were evaluated in the ESS based on measured carbonate system (CS) parameters data and annual sea-to-air CO₂ fluxes were estimated. It was shown that the total ESS shelf is a net source of CO₂ for the atmosphere at a range from 0.5×10¹² to 3.3×10¹² g C

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Section: Discussionmentioning

confidence: 99%

Interannual variability of air-sea CO2 fluxes and carbonate system parameters in the East Siberian Sea

Pipko¹,

Semiletov²,

Pugach³

et al. 2011

Preprint

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“…Anderson et al (2011) computed the ESS annual PP based on consumption of dissolved inorganic carbon and evaluated its magnitude to be ∼ 4(±10) × 10 12 g C if integrated over half of the ESS area. Other estimations of the ESS annual PP are between 10 and 15 × 10 12 g C (Vinogradov et al, 2000;Vetrov and Romankevich, 2004;Berger and Primakov, 2007). The maximal value of total PP in the ESS was estimated to be 45 × 10 12 g C (Sakshaug, 2004), but the latter number is highly uncertain because it was calculated by extrapolating data from the highly-productive surrounding shelf seas.…”

Section: Study Areamentioning

confidence: 99%

“…Input, production, degradation, and export of organic matter (OM) into and out of the coastal ocean are several times higher than in the open ocean (Wollast, 1998). Consequently, it can be expected that the CO 2 exchange between the atmosphere and coastal environments is more intense than in the open ocean and thus is significant for the global carbon budget despite the relatively small surface area of the coastal oceans (Borges et al, 2006). This is especially the situation in the Arctic Ocean where terrestrial and coastal permafrost is a huge reservoir of bioavailable organic carbon that is already involved in the modern biogeochemical cycle (Guo et al, 2004;Semiletov et al, 2007;van Dongen et al, 2008;Anderson et al, 2009;Vonk et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Interannual variability of air-sea CO2 fluxes and carbon system in the East Siberian Sea

et al. 2011

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Abstract. Over the past couple of decades it has become apparent that air-land-sea interactions in the Arctic have a substantial impact on the composition of the overlying atmosphere (ACIA, 2004). The Arctic Ocean is small (only ∼4 % of the total World Ocean), but it is surrounded by offshore and onshore permafrost which is thawing at increasing rates under warming conditions, releasing carbon dioxide (CO 2 ) into the water and atmosphere. The Arctic Ocean shelf where the most intensive biogeochemical processes have occurred occupies 1/3 of the ocean. The East Siberian Sea (ESS) shelf is the shallowest and widest shelf among the Arctic seas, and the least studied. The objective of this study was to highlight the importance of different factors that impact the carbon system (CS) as well as the CO 2 flux dynamics in the ESS. CS variables were measured in the ESS in September 2003September and, 2004 and in late August-September 2008. It was shown that the western part of the ESS represents a river-and coastal-erosion-dominated heterotrophic ocean margin that is a source for atmospheric CO 2 . The eastern part of the ESS is a Pacific-water-dominated autotrophic area, which acts as a sink for atmospheric CO 2 .Our results indicate that the year-to-year dynamics of the partial pressure of CO 2 in the surface water as well as the air-sea flux of CO 2 varies substantially. In one year the ESS shelf was mainly heterotrophic and served as a moderate summertime source of CO 2 (year 2004). In another year gross primary production exceeded community respiration in a relatively large part of the ESS and the ESS shelf was only a weak source of CO 2 into the atmosphere (year 2008). It was shown that many factors impact the CS and Correspondence to: I. I. Pipko (irina@poi.dvo.ru) CO 2 flux dynamics (such as river runoff, coastal erosion, primary production/respiration, etc.), but they were mainly determined by the interplay and distribution of water masses that are basically influenced by the atmospheric circulation. In this contribution the air-sea CO 2 fluxes were evaluated in the ESS based on measured CS characteristics, and summertime fluxes were estimated. It was shown that the total ESS shelf is a net source of CO 2 for the atmosphere in a range of 0.4 × 10 12 to 2.3 × 10 12 g C.

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“…The average size of the first growth ring was about 1 mm, that of the second growth ring was 1.6 mm, while 3‐year‐old molluscs had a shell length of 3–4 mm. The reasons behind such a low growth rate may be associated with the severe temperature conditions of the Kara Sea, which is ice‐covered from September–October to late June–early July (Gerasimov, 1970; Pavlov & Pfirman, 1995), and therefore has a very low productivity (Berger, 2007). Unlike the Kara Sea, the White Sea, where M. calcarea grows much faster in the first years of life (Figure 9), is free of ice by the end of May (Babkov & Golikov, 1984) and is much more productive (Berger, 2007).…”

Section: Discussionmentioning

confidence: 99%

Macoma calcarea (Gmelin, 1791), a poorly studied bivalve, in the Kara Sea: Distribution and growth variability

Lisitsyna,

Gerasimova,

Filippova

2024

Marine Ecology

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Macoma calcarea, one of the most common bivalves in the infauna of the Arctic seas of Russia, is still poorly investigated from an ecological viewpoint. We studied the distribution and growth of Macoma in the southwestern part of the Kara Sea. The samples were obtained at 119 stations at depths from 4 to 415 m in 2012–2013. The main trends in the distribution of this species corresponded to its feeding type (deposit‐feeder), the biogeographic affiliation and the features of reproductive ecology. Macoma calcarea in the study area were mainly concentrated at depths of 20–50 m. Their density and biomass were, respectively, eight and two times higher on silty sediments than on sandy ones. The results of age assessment of M. calcarea by the external growth marks and the shell cross‐sections were quite similar. However, age determination based on internal growth marks was found to be preferable for older individuals and individuals with heavily eroded shells. Group growth rate of M. calcarea was not very sensitive to environmental conditions. No site‐to‐site variability in the growth characteristics was found. The maximum size and age of M. calcarea (37 mm and 21 years respectively), as well as the average annual growth rate (about 2 mm/year), were close to the values of these parameters in other parts of the distribution of this species.

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Assessment of primary production in the White Sea

Cited by 10 publications

References 1 publication

Interannual variability of air-sea CO<sub>2</sub> fluxes and carbonate system parameters in the East Siberian Sea

Interannual variability of air-sea CO<sub>2</sub> fluxes and carbonate system parameters in the East Siberian Sea

Interannual variability of air-sea CO<sub>2</sub> fluxes and carbon system in the East Siberian Sea

Macoma calcarea (Gmelin, 1791), a poorly studied bivalve, in the Kara Sea: Distribution and growth variability

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Assessment of primary production in the White Sea

Cited by 10 publications

References 1 publication

Interannual variability of air-sea CO&lt;sub&gt;2&lt;/sub&gt; fluxes and carbonate system parameters in the East Siberian Sea

Interannual variability of air-sea CO&lt;sub&gt;2&lt;/sub&gt; fluxes and carbonate system parameters in the East Siberian Sea

Interannual variability of air-sea CO&lt;sub&gt;2&lt;/sub&gt; fluxes and carbon system in the East Siberian Sea

Macoma calcarea (Gmelin, 1791), a poorly studied bivalve, in the Kara Sea: Distribution and growth variability

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Interannual variability of air-sea CO<sub>2</sub> fluxes and carbonate system parameters in the East Siberian Sea

Interannual variability of air-sea CO<sub>2</sub> fluxes and carbonate system parameters in the East Siberian Sea

Interannual variability of air-sea CO<sub>2</sub> fluxes and carbon system in the East Siberian Sea