Large River Plumes Detection by Satellite Altimetry: Case Study of the Ob–Yenisei Plume

Frey, D. I.; Osadchiev, Alexander

doi:10.3390/rs13245014

Cited by 14 publications

(8 citation statements)

References 63 publications

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“…Such curved topography is common in coastal areas. Unlike the well‐studied canyon topography, how a protruding headland or submerged bathymetric bump affects the separation of buoyant coastal currents has been less explored with a few exceptions (Frey & Osadchiev, 2021; Warrick & Stevens, 2011; Whitney, 2023). This study investigated such a dynamic effect using the Changjiang River plume as an example.…”

Section: Introductionmentioning

confidence: 99%

Cross‐Shelf Penetrating Fronts of Buoyant Coastal Currents Around the Headland

Zhou

2023

JGR Oceans

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Estuarine water mixed with oceanic water moves along the coast as a buoyant coastal current, which usually follows isobaths if the coast is largely straight. A bottom-trapped river plume is thus often formed in which the bottom front stands at a specific location (Chapman & Lentz, 1994;Lentz & Helfrich, 2002). Hence, most of the buoyant current moves in the along-shelf rather than in the cross-shelf direction. Ideally, inside the river mouth different-sourced water mixes and exchanges (

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Section: Introductionmentioning

confidence: 99%

Cross‐Shelf Penetrating Fronts of Buoyant Coastal Currents Around the Headland

Zhou

2023

JGR Oceans

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“…Analysis of satellite images of the Pechora Sea provides opportunity to significantly extend spatial and temporal coverage of available in situ measurements and to improve the understanding of variability of area of the Pechora plume. Nevertheless, usage of satellite data for detecting large river plumes requires verification against synchronous in situ measurements, otherwise straightforward usage of satellite data could be misleading (Frey and Osadchiev, 2021).…”

Section: Comparison Of Satellite and In Situ Datamentioning

confidence: 99%

Structure and variability of the Pechora plume in the southeastern part of the Barents Sea

2023

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The Pechora River forms the large Pechora River plume in the southeastern part of the Barents Sea (also called the Pechora Sea). Many previous works addressed water masses in the Barents Sea, however, the Pechora plume received relatively little attention, therefore, many basic aspects of its structure and variability remain unknown. In this study, we focus on spreading of the Pechora plume in the Pechora Sea during ice-free periods. Based on the extensive in situ measurements and satellite observations, we describe the dependence of area and spatial characteristics of the Pechora plume on wind forcing, river discharge rate, and spring ice conditions. We reveal three general types of Pechora plume spreading, which are determined by the external forcing conditions. Joint analysis of a large set of in situ and satellite data provided opportunity to study the variability of the Pechora plume on the synoptic, seasonal, and interannual time scales. We reveal regular advection of the Pechora plume through the Kara Strait into the Kara Sea. In addition, we describe formation of a significant area of increased salinity within the Pechora plume formed during wind-induced coastal upwelling events. The results of this research are of key importance for understanding the physical, biological, and geochemical processes in the Pechora Sea and the adjacent areas of the Barents and Kara seas.

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“…We presume that this instability in the manifestation of the gyre in ADT maps is caused by the relatively low velocity of the FSBW gyre and the resulting small difference in sea level between the center and periphery of the eddy (3-5 cm). As a result, this small sea-level gradient in the trough could be distorted by the wind forcing, which causes a shift of the sea-level minimum from the eddy center (Frey and Osadchiev, 2021). The relatively narrow St. Anna Trough is sandwiched by land and/or shallow areas including the Franz Josef Land in the west and the Central Kara Plateau (<100 m deep) with Vize Island and the Ushakov Island (Figure 1B).…”

Section: Fsbw In the St Anna Troughmentioning

confidence: 99%

Structure and Circulation of Atlantic Water Masses in the St. Anna Trough in the Kara Sea

et al. 2022

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The inflow of warm and saline Atlantic water from the North Atlantic to the Western Arctic is provided by two branches, namely, the Fram Strait branch water and the Barents Sea branch water. The pathways of these branches merge at the St. Anna Trough, and then both branches propagate eastward along the continental slope, albeit at different depths. As a result, the local interaction between these branches in the trough affects the properties of the large-scale Atlantic water flow to the Eastern Arctic and the deep Arctic basins. In this study, we report extensively in situ measurements with high spatial coverage (56 hydrological stations organized into 7 transects) in the St. Anna Trough, obtained in August and October 2021. Based on these data, we reconstructed the thermohaline structure and circulation in this area and obtained new insights, which are crucial for the assessment of the interaction and heat balance of water masses in the trough. First, we state that the majority of the Fram Strait branch water is recirculated in the trough within the stable cyclonic gyre, while a smaller fraction returns to the continental slope. The formation of this gyre increases the residence time of the Fram Strait branch water in the trough and decreases the intensity of water and heat exchange between the trough and the continental slope. Second, we describe the dynamic interaction between the northward flow of the Barents Sea branch water and the surface layer. It causes intense transport of warm surface water from the Kara and Barents seas adjacent to the Novaya Zemlya toward the continental slope and its mixing with the Barents Sea branch water along the eastern part of the trough. These processes result in increased surface temperature at the eastern part of the trough, which enhances ice melting at the study area and increases the duration of the ice-free period.

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Large River Plumes Detection by Satellite Altimetry: Case Study of the Ob–Yenisei Plume

Cited by 14 publications

References 63 publications

Cross‐Shelf Penetrating Fronts of Buoyant Coastal Currents Around the Headland

Cross‐Shelf Penetrating Fronts of Buoyant Coastal Currents Around the Headland

Structure and variability of the Pechora plume in the southeastern part of the Barents Sea

Structure and Circulation of Atlantic Water Masses in the St. Anna Trough in the Kara Sea

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