Agata Cieszyńska

Polish Academy of Sciences

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Małgorzata Stramska

Polish Academy of Sciences

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Sylwia Śliwińska‐Wilczewska

University of Gdańsk

Adam Latała

University of Gdańsk

Andrzej Jankowski

University of Warmia and Mazury in Olsztyn

Jakub Maculewicz

University of Gdańsk

Knut Yngve Børsheim

Norwegian Institute of Marine Research

Marzena Wereszka

University of Szczecin

Jagoda Białogrodzka

Polish Academy of Sciences

Henrik Søiland

Norwegian Institute of Marine Research

A Dudkowska

Institute of Hydroengineering

Cooperative Institutions

University of Gdańsk

Polish Academy of Sciences

Instytut Oceanologii Polskiej Akademii Nauk

University of Szczecin

Norwegian Institute of Marine Research

Bjerknes Centre for Climate Research

Medical University of Silesia

Institute of Hydroengineering

Gdańsk Medical University

Instytut Medycyny Wsi im. Witolda Chodźki

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The responses to the comments of Reviewer 2

Agata Cieszyńska

10.5194/bg-2018-19-ac2

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Oceanologia (2018)

Agata Cieszyńska Małgorzata Stramska

Climate-related trends and meteorological conditions in the Porsanger fjord, in the vicinity of the Barents Sea, have been analyzed. Meteorological data include wind speed and direction, air temperature (AT) and precipitation from Era-Interim reanalysis (1986–2015) as well as local observations (2006–2015) from Honningsvaag and Lakselv. Statistically significant trends in annual AT means are 0.0485°C year−1 near the fjord mouth and 0.0416°C year−1 near the fjord head. Wind speed and precipitation data do not reveal any definite trends. Statistical analysis confirms the significant spatial variability of meteorological conditions in the fjord. For example, there are large differences in the annual AT cycle, with respective monthly means for January and July of −8.4 and 12.6°C at Lakselv (fjord head) and −2.5 and 10.1°C at Honningsvaag (fjord mouth). Strong wind events (>12 m s−1) are more frequent at Honningsvaag than at Lakselv. The annual cycle is characterized by stronger winds in winter and seasonality of wind direction. At Lakselv, the dominant wind directions in summer are: N, NNW and S and in winter: S and SSE. At Honningsvaag, the wind directions in summer present strong variability, no fixed pattern being pronounced, whilst the dominant sectors in winter are: S and SSW. Daily cycles in AT and wind speed are also observed. Precipitation at a given location can change by about 30% year-on-year and varies spatially. Estimates of terrigenous water discharge (derived from the E-HYPE model) reveal a seasonal cycle with the maximum discharge in late spring/early summer.

Fjord

Annual cycle

Oceanic climate

Seasonality

10.1016/j.oceano.2018.01.003

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Citations (7)

To what extent does the salinity flux influence phytoplankton blooms? - Baltic Sea modeling study

EGU General Assembly Conference Abstracts (2016)

Agata Cieszyńska Małgorzata Stramska

Baltic sea

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Eco-physiological Baltic picoplankton analysis and its implementation in Synechoccocus species life cycle numerical algorithm

EGUGA (2017)

Agata Cieszyńska Sylwia Śliwińska‐Wilczewska

Picoplankton

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Surface currents in the Porsanger fjord in northern Norway

Polish Polar Research (2016)

Małgorzata Stramska Andrzej Jankowski Agata Cieszyńska

Abstract We describe surface currents in the Porsanger fjord (Porsangerfjorden) located in the European Arctic in the vicinity of the Barents Sea. Our analysis is based on surface current data collected in the summer of 2014 using High Frequency (WERA, Helzel Messtechnik GmbH) radar system. One of our objectives was to separate out the tidal from the nontidal components of the currents and to determine the most important tidal constituents. Tides in the Porsanger fjord are substantial, with tidal range on the order of about 3 m. Tidal analysis attributes to tides about 99% of variance in sea level time series recorded in Honningsvaag. The most important tidal component in sea level data is the M2 component, with amplitude of ~90 cm. The S2 and N2 constituents (amplitude of ~20 cm) also play a significant role in the semidiurnal sea level oscillations. The most important diurnal component is K1 with amplitude of about 8 cm. The most important tidal component in analyzed surface currents records is the M2 component. The second most important component is the S2. Our results indicate that in contrast to sea level, only about 10-30% of variance in surface currents can be attributed to tidal currents. This means that about 70-90% of variance is due to wind-induced and geostrophic currents.

Fjord

Tidal current

Geostrophic current

10.1515/popore-2016-0018

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Citations (8)

Application of hydrographic and surface current data to describe water properties in the Porsangerfjorden, Norway

EGU General Assembly Conference Abstracts (2016)

Agata Cieszyńska Jagoda Białogrodzka Knut Yngve Børsheim Małgorzata Stramska Andrzej Jankowski

Current meter

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Ecophysiological characteristics of red, green, and brown strains of the Baltic picocyanobacterium <i>Synechococcus</i> sp. – a laboratory study

Biogeosciences (2018)

Sylwia Śliwińska‐Wilczewska Agata Cieszyńska Jakub Maculewicz Adam Latała

Abstract. The contribution of picocyanobacteria (PCY) to summer phytoplankton blooms, accompanied by an ecological crisis is a new phenomenon in Europe. This issue requires careful investigation. The present study examined the response of Synechococcus sp. physiology to different environmental conditions. Three strains of Synechococcus sp. (red BA-120, green BA-124, and brown BA-132) were cultivated in a laboratory under previously determined environmental conditions. These conditions were as follows: temperature (T) from 10 by 5 to 25 ∘C, salinity from 3 by 5 to 18 PSU, and photosynthetically active radiation (PAR) from 10 by 90 to 280 µmol photons m−2 s−1, which gave 64 combinations of synthetic, though realistic, environmental scenarios. Scenarios reflecting all possible combinations were applied in the laboratory experiments. Results pointed to differences in final numbers of cells among strains. However, there was also a similar tendency for BA-124 and BA-132, which demonstrated the highest concentrations of PCY cells at elevated T and PAR. This was also the case for BA-120 but only to a certain degree as the number of cells started to decrease above 190 µmol photons m−2 s−1 PAR. Pigmentation, chlorophyll a (Chl a), fluorescence, and rate of photosynthesis presented both similarities and differences among strains. In this context, more consistent features were observed between brown and red strains when compared to the green. In this paper, the ecophysiological responses of PCY are defined.

Photosynthetically active radiation

10.5194/bg-15-6257-2018

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Citations (10)

The responses to he comments of Reviewer 1

Agata Cieszyńska

10.5194/bg-2018-19-ac3

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Application of in situ observations, high frequency radars, and ocean color, to study suspended matter, particulate carbon, and dissolved organic carbon fluxes in coastal waters of the Barents Sea - the NORDFLUX project

EGU General Assembly Conference Abstracts (2016)

Małgorzata Stramska Knut Yngve Børsheim Jagoda Białogrodzka Agata Cieszyńska Dariusz Ficek