Multi-year average intra-annual cycle of hydrooptical characteristics, chlorophyll &lt;i&gt;a&lt;/i&gt; and surface temperature of the Black Sea from satellite data

Artamonov, Yu. V.; Skripaleva, E. A.; Latushkin, Alexandr A.; Fedirko, A. V.

doi:10.21046/2070-7401-2019-16-1-171-180

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(3 citation statements)

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“…This month, the SST RMSD syn values in the water area vary within 1.8-2.6 °С. In June, the surface water heating rate is maximum [25], while the level of synoptic variability sharply decreases. In July, the heating rate slows down, and the level of synoptic variability continues to decrease and reaches minimum in August (Fig.…”

Section: Results Of the Researchmentioning

confidence: 93%

“…An increase in the RMSD syn /RMSD tot values (above 0.17) is also observed on the northwestern shelf between the Dnieper-Bug estuary and the Danube delta, in the northeastern part of the sea and in the Batumi anticyclone area. The minimal contribution of synoptic variability to the total dispersion of the SST field (RMSD syn /RMSD tot below 0.16) was found in the Western cyclonic gyre (WCG), where an increase in the seasonal variability level was noted [5,25]. In most of the sea area, the synoptic variability level is lower or comparable to interannual one and the RMSD syn /RMSD interann values vary within 0.88-1 (Fig.…”

Section: Results Of the Researchmentioning

confidence: 93%

“…The synoptic variability level increase of (RMSD syn ~ 1.1-1.25 °С) is also observed along the entire western shelf and in the pre-Bosporus area, almost up to Cape Olyudzhe above the sea depths less than 75 m. In the deep-sea part, high RMSD syn values (up to 1-1.2 °С) can be traced in the areas of the Eastern cyclonic gyre (ECG) and the Batumi anticyclone, which is more clearly manifested according to actual surveys, satellite altimetry and model calculations [4,12,15,24]. The minimum RMSD syn values (below 1 °С) are observed in the coastal strip along the Anatolian coast between Cape Olyudge and Cape Fener, as well as in the region of the minimum seasonal variation of SST [5,25] to the west of the Crimean coast.…”

Section: Results Of the Researchmentioning

confidence: 99%

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Regional Features of the Temperature FieldSynoptic Variability on the Black Sea Surface from Satellite Data

Artamonov¹,

Skripaleva²,

Fedirko³

2020

PhO

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The aim of the work is to clarify the regional features of synoptic variability of the Black Sea surface temperature, to reveal its intra-and inter-annual changes and to assess the features' relations with the large-scale atmospheric processes. Methods and Results. The satellite-derived data on the sea surface temperature in 1982-2018 from the Copernicus array were used; their temporal resolution was daily average and the spatial one -0.04 degrees. These data showed that the maximum of temperature synoptic variability was observed in the coastal part of the northwestern shelf from the Dnieper-Bug estuary to the Danube delta, in the Karkinit Bay and in the Kerch Strait. In the deep sea, strong synoptic variability can be observed in the regions of the Eastern cyclonic gyre and the Batumi anticyclone. The greatest contribution of synoptic variability to the total temperature dispersion was observed in the Kerch Strait and to the south of the Kerch Peninsula. The level of multi-year average synoptic variability is lower or comparable with the level of the interannual variability in most of the water area, except for the Kerch Strait, the northwestern and the Bosporus shelves. It is revealed that in the climatic annual cycle the main maximum of synoptic variability is observed in May, a month before the maximum rate of surface water heating is achieved, the second maximum -in October, a month before the maximum rate of water cooling. The minimums are observed in February-March, during the period of maximum cooling of surface waters, and in August, during their maximum heating. Noticeable interannual changes of the level of temperature synoptic variability varying from −0.3 °С to 0.3 °С, were revealed. Conclusions. Synoptic variability of the Black Sea surface temperature is characterized by noticeable intra-annual and interannual variations. Its climatic annual cycle is of a semi-annual periodicity due to the processes of water cooling and heating. The maximum increase of the synoptic variability level on the interannual scale is observed after 2003 on the northwestern shelf. Significant correlation with the indices of the North Atlantic, East Atlantic and the East Atlantic-West Russia oscillations was not revealed.

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Section: Results Of the Researchmentioning

confidence: 93%

Section: Results Of the Researchmentioning

confidence: 93%