The structure of thermohaline and bio-optical fields in the surface layer of the Kara Sea in September 2011

Zavialov, Peter; Izhitskiy, Alexander; Osadchiev, Alexander; Pelevin, Vadim; Grabovskiy, A. B.

doi:10.1134/s0001437015040177

Cited by 32 publications

(24 citation statements)

References 5 publications

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“…There was a steady salinity decrease from 20 to the minimum value of 15 registered at the part of the ship track closest to the Gulf of Ob and then a steady increase to 28. More detailed information about the surface salinity distribution in the study region is given by Zavialov et al [2015]. The disposition of water types in region I reproduces a typical configuration of a river plume; therefore, we can regard the most saline and distant water types from the Gulf of Ob cluster as ''ambient sea water'' (AS), the freshest and closest cluster as ''Ob-dominated plume water'' (OP), and a third cluster (OP/AS) that defines the mixing area between AS and OP.…”

Section: Water Types Of the Ob-yenisei River Plumementioning

confidence: 99%

“…In particular, more than 70% of the annual continental runoff into the Kara Sea is discharged from the Ob and Yenisei gulfs from June to September, which is approximately 3% of the total annual continental runoff into the world ocean [ Meade et al ., ; Oki and Kanae , ]. This huge volume of fresh water forms a large buoyant plume that occupies an area of up to 350,000 km 2 in the southern part of the Kara Sea [ Johnson et al ., ; Zavialov et al ., ].…”

Section: Introductionmentioning

confidence: 99%

“…Many previous studies focused on the important role of the Ob‐Yenisei river plume in the large‐scale physical, chemical, and biological processes in the Kara Sea [ Neelov and Kouraev , ; Harms and Karcher , ; McClimans et al ., ; Harms and Karcher , ; Galimov et al ., ; Panteleev et al ., ; Zatsepin et al ., ; Makkaveev et al ., ; Zavialov et al ., ; Zatsepin et al ., ]. Other papers examined the chemical and biological characteristics of the plume and spatial and temporal variations in these parameters [ Gordeev et al ., ; Köhler et al ., ; Gebhardt et al ., ; Unger et al ., ; Makkaveev et al ., ; Kubryakov et al ., ].…”

Section: Introductionmentioning

confidence: 99%

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Structure of the buoyant plume formed by Ob and Yenisei river discharge in the southern part of the Kara Sea during summer and autumn

et al. 2017

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This article focuses on the interaction between the Ob‐ and Yenisei‐dominated parts of the large Ob‐Yenisei buoyant plume formed in the southern part of the Kara Sea during ice‐free periods. It was shown that certain wind forcing and river discharge conditions cause the formation of a specific structure of the Ob‐Yenisei plume with significantly different properties of the Ob‐ and Yenisei‐dominated water masses. Under these conditions, the Yenisei runoff generates a narrow coastal current propagating northward from the Yenisei Gulf along the Taymyr Peninsula, which is isolated by the Ob‐dominated water mass from ambient sea water. As a result, the low‐salinity Yenisei‐dominated water mass occupies a relatively small area, while more saline Ob‐dominated water mass spreads over a wide area between the Gulf of Ob and the Taymyr Peninsula. The formation of the “isolation” configuration of the Ob‐Yenisei plume described above is presumed to be caused by the eastward Ekman transport and the resulting downwelling flow of the Ob‐dominated waters under the low‐saline and warm Yenisei‐dominated waters along the Taymyr Peninsula. Based on satellite imagery, wind reanalysis, and river discharge data collected and derived for the period of 2005–2011, it was estimated that the “isolation” configuration is regularly formed during late summer and autumn when the Ob discharge to the Kara Sea exceeds the Yenisei discharge and the local atmospheric circulation is dominated by the northerly wind regime. Assessment of the frequency and duration of the occurrence of the “isolation” configuration showed their synoptic time scale and significant interannual variability.

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Section: Water Types Of the Ob-yenisei River Plumementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structure of the buoyant plume formed by Ob and Yenisei river discharge in the southern part of the Kara Sea during summer and autumn

et al. 2017

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“…The data used in the study was obtained in scientific cruises held by SIO RAS to the Kara Sea in 1993, 2011(Lisitzin and Vinogradov 1994, Flint 2010, Flint and Poyarkov 2015, Flint et al 2016. Sites layout is shown on figure 1.…”

Section: Methodsmentioning

confidence: 99%

“…According to modern data, 1400-1600 km 3 of fresh water annually enters its water area (Harms andKarcher 1999, Osadchiev et al 2017) due to the continental runoff of the Ob and Yenisei rivers, as well as many other small rivers. Previously a lot of attention was paid on physical characteristics of the river plume, disposition of frontal zones (Zavialov et al 2015) and physical conditions of the desalinated surface layer of the Kara Sea (Zatsepin et al 2015). There is also a general trend towards a decrease in the ice cover in the Arctic (Vihma 2014), which is also reflected in the Kara Sea (Petoukhov and Semenov 2010).…”

Section: Introductionmentioning

confidence: 99%

The role of river runoff in the Kara Sea surface layer acidification and carbonate system changes

Polukhin

2019

Environ. Res. Lett.

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This study aims to perform the results of the investigation of the Kara Sea carbonate system (CS) changes and the factors that determine it. The important feature of the Kara Sea water structure is strong stratification caused mainly by the Ob' and Yenisey rivers discharge which is estimated as 81% of the total continental runoff to sea. Occurring climate changes, as an increase in the total volume of the Arctic Ocean water (due to melting of glaciers, sea ice decline and river runoff increase), air temperature and CO 2 concentration growth should affect greatly the Kara Sea CS. However, riverine water influence seems to be the main driver of future acidification of the Kara Sea water due to permafrost thawing as it stores a great amount of buried carbon. An increase of carbon (mainly inorganic) flow to the sea will lead to carbonate equilibrium shift, oxidation of organic matter and release of CO 2 that ultimately leads to a decrease in pH and therefore acidification. The area of the riverine plume depends on the amount of freshwater flowing into the sea and the conditions of the wind forcing. According to the data from Shirshov Institute cruises within the plume area aragonite saturation is below 1 that shows its state as acidified. Prevalence of pCO 2 values in the freshened surface layer over the atmospheric shows that atmospheric carbon dioxide, apparently, cannot serve as the main driver for the acidification of the surface waters of the Kara Sea. At the shallow shelf to the north of the Ob′ Inlet mouth we observe acidification of the whole water column from surface to the bottom layer due to elevated riverine discharge and increase of flowing terrestrial carbon.

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Sedimentation on the Siberian Arctic Shelf as an indicator of the arctic hydrological cycle

Rusakov

Borisov

2023

Anthropocene

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The structure of thermohaline and bio-optical fields in the surface layer of the Kara Sea in September 2011

Cited by 32 publications

References 5 publications

Structure of the buoyant plume formed by Ob and Yenisei river discharge in the southern part of the Kara Sea during summer and autumn

Structure of the buoyant plume formed by Ob and Yenisei river discharge in the southern part of the Kara Sea during summer and autumn

The role of river runoff in the Kara Sea surface layer acidification and carbonate system changes

Sedimentation on the Siberian Arctic Shelf as an indicator of the arctic hydrological cycle

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