hydrophysicsФундаментальная и прикладная гидрофизикаFundamental and Applied Hydrophysics2073-66732782-5221St. Petersburg Research Center of the Russian Academy of Sciences10.59887/fpg/38mu-zda7-dpephydrophysics-1153Research ArticleГИДРОФИЗИЧЕСКИЕ И БИОГЕОХИМИЧЕСКИЕ ПОЛЯ И ПРОЦЕССЫHYDROPHYSICAL AND BIOGEOCHEMICAL FIELDS AND PROCESSESПространственно-временная изменчивость характеристик стоковой фронтальной зоны в Карском море в первые два десятилетия XXI векаSpatial and Temporal Variability of the Characteristics of the River Plume Frontal Zone in the Kara Sea in the First Two Decades of the XXI Centuryhttps://orcid.org/0000-0002-2089-158XКоникА. А.KonikA. A.

КОНИК Александр Александрович

РИНЦ AuthorID: 950834

Scopus AuthorID: 57203864647

117997, Россия, Москва, Нахимовский проспект, 36

199034, Университетская наб., 7–9, г. Санкт-Петербург

 Aleksandr A. Konik

 AuthorID: 950834

 Scopus AuthorID: 5720386464736 Nakhimovsky Prosp., Moscow, 117997

7–9 Universitetskaya Emb., St. Petersburg, 199034

konikrshu@gmail.comhttps://orcid.org/0000-0003-1662-6385ЗиминА. В.ZiminA. V.

ЗИМИН Алексей Вадимович

РИНЦ AuthorID: 124451

Scopus AuthorID: 57203864647

117997, Россия, Москва, Нахимовский проспект, 36

199034, Университетская наб., 7–9, г. Санкт-Петербург

 Alexey V. Zimin

 AuthorID: 124451

 Scopus AuthorID: 55032301400

 WoS ResearcherID: C-5885-201436 Nakhimovsky Prosp., Moscow, 117997

7–9 Universitetskaya Emb., St. Petersburg, 199034

zimin2@mail.ruhttps://orcid.org/0000-0001-6820-0533АтаджановаО. А.AtadzhanovaO. A.

АТАДЖАНОВА Оксана Алишеровна

РИНЦ AuthorID: 846708

299011, ул. Капитанская, д. 2, г. Севастополь

Oksana A. Atadzhanova

AuthorID: 846708

2 Каpitanskaya Str., Sevastopol, 299011

oksana.atadzhanova@gmail.comИнститут океанологии им. П.П. Ширшова РАН; Санкт-Петербургский государственный университетРоссияShirshov Institute of Oceanology, Russian Academy of Sciences; St. Petersburg State UniversityRussian FederationМорской гидрофизический институт РАНРоссияMarine Hydrophysical Institute, Russian Academy of SciencesRussian Federation20220601202315423–41Copyright © Коник А.А., Зимин А.В., Атаджанова О.А., 20232023Коник А.А., Зимин А.В., Атаджанова О.А.Konik A.A., Zimin A.V., Atadzhanova O.A.This work is licensed under a Creative Commons Attribution 4.0 License.https://hydrophysics.spbrc.ru/jour/article/view/1153

Статья посвящена получению многолетних физико-географических характеристик Стоковой фронтальной зоны как отдельной гидрологической структуры, формирующейся на границе поверхностного опресненного слоя рек Оби и Енисея и морских вод в Карском море. В качестве исходных данных для выделения фронтальной зоны в работе выступают спутниковые измерения поверхностной температуры (MODIS Aqua, Suomi NPP-VIIRS), поверхностной солености (NASA SMAP) и уровня моря (AVISO) за период с июля по октябрь с 2002 по 2020 гг. Положение и характеристики Стоковой фронтальной зоны определялись с помощью кластерного анализа, который впервые был применен к обобщённому набору данных дистанционного спутникового зондирования в этом регионе. Установлено, что в теплый период года средний многолетний температурный поверхностный градиент Стоковой фронтальной зоны составляет 0,08 °C/км, градиент поверхностной солености 0,1 PSU/км, а площадь — 155 тыс. км2. Выявлено, что за безледный период второго десятилетия XXI века градиент температуры фронтальной зоны ослабевает на 0,04 °C/км, а площадь уменьшается на 100 тыс. км2. Показано, что температурный и соленостный градиенты, а также площадь Стоковой фронтальной зоны определяются объемами речного стока Оби и Енисея и параметрами льдов в теплый период года. Получены оценки связи характеристик фронтальной зоны с объема речного стока, параметрами ледяного покрова и ветра, а также величиной атмосферных индексов Скандинавского колебания.

The article is devoted to obtaining long-term physical and geographical characteristics of the River Plume frontal zone as a separate hydrological structure that forms at the boundary of the fresh surface layer of the Ob and Yenisei Rivers. The primary data for identifying the frontal zone are satellite measurements of surface temperature (MODIS Aqua, Suomi NPP-VIIRS), surface salinity (NASA SMAP) and sea level (AVISO) for the period from July to October from 2002 to 2020. The position and characteristics of the River Plume frontal zone were determined using cluster analysis, which was applied for the first time to an integrated set of remote satellite sensing data in this region. The results of the study showed that in the warm period of the year, the average long-term surface temperature gradient of the River Plume frontal zone was 0.08 °C/km, the surface salinity gradient was 0.1 PSU/km, and the area was 155,000 km2. During the ice-free period of the second decade of the 21st century, the temperature gradient of the frontal zone weakens by 0.04 °C/km, and the area decreases by 100,000 km2. The correlation analysis showed that the temperature and salinity gradients, as well as the area of the River Plume frontal zone, were determined by the volumes of the river discharge of the Ob and Yenisei and ice parameters in the warm period of the year. The article presents the obtained estimates of the relationship between the characteristics of the frontal zone and the volume of river discharge, ice cover and wind parameters, as well as the value of the atmospheric indices of the Scandinavian oscillation (SCAND). 

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The authors declare that there are no conflicts of interest present.