TY - JOUR

T1 - ПРОСТРАНСТВЕННО-ВРЕМЕННАЯ ИЗМЕНЧИВОСТЬ ХАРАКТЕРИСТИК ПОЛЯРНОЙ ФРОНТАЛЬНОЙ ЗОНЫ В БАРЕНЦЕВОМ МОРЕ В ПЕРВЫЕ ДВА ДЕСЯТИЛЕТИЯ XXI ВЕКА

AU - Konik, A. A.

AU - Zimin, A. V.

AU - Kozlov, I. E.

N1 - Funding Information: This research was supported by RFBR grant 20–35–90053 ?analysis of the data on frontal zone characteris? tic and atmospheric oscillations?; the Ministry of Science and Higher Education of the Russian Federation, theme 0128–2021–0014 ?processed and analyzed of satellite data on sea surface temperature and salinity?; the Ministry of Science and Higher Education of the Russian Federation, theme 075–00429–21–03 ?analysis of the characteristics of eddies structures according to satellite SAR data?. Publisher Copyright: © 2021 Russian Academy of Sciences,Department of the Earth Sciences. All rights reserved.

PY - 2021

Y1 - 2021

N2 - The article considers the spatial and temporal variability of the Polar Frontal Zone (PFZ) characteristics in the Barents Sea during the warm season from 2002 to 2020. In addition, the occurrence of small eddy structures in the PFZ region in different years is investigated, and the relationship of the characteristics of the frontal zone with global atmospheric processes is described. The position and characteristics of the PFZ were derived from satellite measurements using the cluster analysis method. Eddy structures in the PFZ region were detected from images of Envisat Asar and Sentinel-1A/B synthetic aperture radars. The NAO, EA, EA/WR and SCAND indices were used to assess the influence of atmospheric processes on the PFZ properties. It was found that the intra-annual values of temperature and salinity gradients in the PFZ region remained stable during the warm season and reached 0.05 °C/km and 0.02%/km, respectively. The variability of the interannual estimates of the PFZ properties ranged from 0.02 °C/km to 0.08 °C/km in temperature, from 0.01 to 0.03%/km in salinity, and from 120,000 to 425,000 km2 in area. The maximum monthly mean values of the PFZ area were observed in 2007, while the minimum - in 2003. The obtained results clearly showed that the intensity of the PFZ decreased after 2010, which is presumably related to the “Atlantification” of the Barents Sea. The maximum number of small eddy structures in the PFZ region was identified in 2009. It is shown that the SCAND index for the previous winter season can be used as a predictor for predicting the characteristics of the PFZ in the summer period.

AB - The article considers the spatial and temporal variability of the Polar Frontal Zone (PFZ) characteristics in the Barents Sea during the warm season from 2002 to 2020. In addition, the occurrence of small eddy structures in the PFZ region in different years is investigated, and the relationship of the characteristics of the frontal zone with global atmospheric processes is described. The position and characteristics of the PFZ were derived from satellite measurements using the cluster analysis method. Eddy structures in the PFZ region were detected from images of Envisat Asar and Sentinel-1A/B synthetic aperture radars. The NAO, EA, EA/WR and SCAND indices were used to assess the influence of atmospheric processes on the PFZ properties. It was found that the intra-annual values of temperature and salinity gradients in the PFZ region remained stable during the warm season and reached 0.05 °C/km and 0.02%/km, respectively. The variability of the interannual estimates of the PFZ properties ranged from 0.02 °C/km to 0.08 °C/km in temperature, from 0.01 to 0.03%/km in salinity, and from 120,000 to 425,000 km2 in area. The maximum monthly mean values of the PFZ area were observed in 2007, while the minimum - in 2003. The obtained results clearly showed that the intensity of the PFZ decreased after 2010, which is presumably related to the “Atlantification” of the Barents Sea. The maximum number of small eddy structures in the PFZ region was identified in 2009. It is shown that the SCAND index for the previous winter season can be used as a predictor for predicting the characteristics of the PFZ in the summer period.

KW - Barents Sea

KW - Cluster analysis

KW - EA

KW - EA/WR

KW - NAO

KW - Polar frontal zone

KW - Satellite observations

KW - SCAND

KW - Sea surface salinity

KW - Sea surface temperature

KW - Small eddies

UR - http://www.scopus.com/inward/record.url?scp=85123512850&partnerID=8YFLogxK

U2 - 10.7868/S2073667321040043

DO - 10.7868/S2073667321040043

M3 - статья

AN - SCOPUS:85123512850

VL - 14

SP - 39

EP - 51

JO - ФУНДАМЕНТАЛЬНАЯ И ПРИКЛАДНАЯ ГИДРОФИЗИКА

JF - ФУНДАМЕНТАЛЬНАЯ И ПРИКЛАДНАЯ ГИДРОФИЗИКА

SN - 2073-6673

IS - 4

ER -