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Linking Physical Oceanography and Remote Sensing Technology: Progress and Prospect

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Dear Colleagues,

Seawater dynamics affect the marine environment at different spatial and temporal scales from local pollution transport to global climate change. Among other scales, the study of mesoscale changes in the ocean receives growing interest from the scientific community due to significant progress in satellite observations and numerical modelling obtained during last decades. The development of drone technology and ship-based radars hold promise for providing an additional boost to investigations in these field. This Special Issue, entitled “Linking Physical Oceanography and Remote Sensing Technology: Progress and Prospect" aims to gather research on various aspects of ocean physical processes described using remote sensing technology including satellites, drones, and radars. The topics of interest may include, but are not limited to, the following:

Ocean modelling with remote sensing data assimilation;
Measurements of sea surface properties using remote sensing;
Ocean circulation;
Mesoscale ocean dynamics;
Ocean turbulence;
Land-ocean and ocean-atmosphere matter and energy exchange.

Dr. Konstantin Alex Korotenko
Prof. Dr. Alexander Osadchiev
Dr. Yukiharu Hisaki
Guest Editors

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16 pages, 16188 KiB

Open AccessArticle

Decline in Ice Coverage and Ice-Free Period Extension in the Kara and Laptev Seas during 1979–2022

by Pavel Shabanov, Alexander Osadchiev, Natalya Shabanova and Stanislav Ogorodov

Remote Sens. 2024, 16(11), 1875; https://doi.org/10.3390/rs16111875 - 24 May 2024

Viewed by 911

Abstract

The duration of ice-free periods in different parts of the Arctic Ocean plays a great role in processes in the climate system and defines the most comfortable sea ice conditions for economic activity. Based on satellite-derived sea ice concentration data acquired by passive microwave instruments, we identified the spatial distribution of the dates of sea ice retreat (DOR), dates of sea ice advance (DOA), and the resulting ice-free period duration (IFP) between these days for the Kara and Laptev seas during 1979–2022. The monthly decline in sea ice extent was detected from June to October in both seas, i.e., during the whole ice-free period. The annual mean sea ice extent during 2011–2021 decreased by 19.0% and 12.8% relative to the long-term average during 1981–2010 in the Kara and Laptev seas, respectively. The statistically significant (95% confidence level) positive IFP trends were detected for the majority of areas of the Kara and Laptev seas. Averaged IFP trends were estimated equal to +20.2 day/decade and +16.2 day/decade, respectively. The observed DOR tendency to earlier sea ice melting plays a greater role in the total IFP extension, as compared to later sea ice formation related to the DOA tendency. We reveal that regions of inflow of warm Atlantic waters to the Kara Sea demonstrate the largest long-term trends in DOA, DOR, and IFP associated with the decrease in ice coverage, that highlights the process of atlantification. Also, the Great Siberian Polynya in the Laptev Sea is the area of the largest long-term decreasing trend in DOR. Full article

(This article belongs to the Special Issue Linking Physical Oceanography and Remote Sensing Technology: Progress and Prospect)

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18 pages, 9706 KiB

Open AccessArticle

Satellite-Based Evaluation of Submarine Permafrost Erosion at Shallow Offshore Areas in the Laptev Sea

by Alexander Osadchiev, Polina Adamovskaya, Stanislav Myslenkov, Oleg Dudarev and Igor Semiletov

Remote Sens. 2023, 15(20), 5065; https://doi.org/10.3390/rs15205065 - 22 Oct 2023

Cited by 2 | Viewed by 1472

Abstract

Large areas of the seafloor in the Laptev Sea consist of submarine permafrost, which has experienced intense degradation over the last decades and centuries. Thermal abrasion of the submarine permafrost results in upward advection of suspended matter, which could reach the surface layer in shallow areas. This process is visually manifested through increased turbidity of the sea surface layer, which is regularly detected in optical satellite imagery of the study areas. In this study, satellite data, wind and wave reanalysis, as well as in situ measurements are analyzed in order to reveal the main mechanisms of seafloor erosion in shallow areas of the Laptev Sea. We describe the synoptic variability in erosion at the Vasilyevskaya and Semenovskaya shoals in response to wind and wave conditions. Finally, using reanalysis data, daily suspended matter flux from this area was evaluated during ice-free periods in 1979–2021, and its seasonal and inter-annual variabilities were described. The obtained results contribute to our understanding of subsea permafrost degradation, the sediment budget, and carbon and nutrient cycles in the Laptev Sea. Full article

(This article belongs to the Special Issue Linking Physical Oceanography and Remote Sensing Technology: Progress and Prospect)

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