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Tytuł:
Water Quality and Radionuclides Content Assessment of the Al-Najaf Sea: Case Study
Autorzy:
Zwain, Haider M.
Almurshedi, Kareem Radhi
Vakili, Mohammadtaghi
Dahlan, Irvan
Naje, Ahmed Samir
Powiązania:
https://bibliotekanauki.pl/articles/1839100.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
irrigation water
water quality assessment
salinity
sodicity
radionuclide
Al-Najaf Sea
Opis:
The Al-Najaf state is witnessing an increased economic development and attracting more investments that require the development of new areas and exploring new water resources. This study evaluates the quality of 12 surface water samples and groundwater from 12 wells for irrigation according to the salinity and sodicity hazards based on electrical conductivity (EC) and sodium adsorption ratio (SAR). In addition, the concentrations of radionuclides, which include Thorium (232Th), Uranium (238U), Potassium (40K) and Cesium (137Cs) were tested in four soil samples in the study area. It was found that the average values of pH, total hardness, Na, Ca, Mg, K, Cl, SO4, NO3 for groundwater and surface water were 8 and 6, 2287 and 4006 mg/L, 1140 and 1232 mg/L, 378 and 637 mg/L, 327 and 587 mg/L, 2 and 2 mg/L, 989 and 2007 mg/L, 1149 and 1325 mg/L, as well as 2 and 2 mg/L, respectively. From salinity and sodicity hazards analysis, the groundwater had EC of 5242 µS/cm and SAR of 61, whereas surface water had EC of 6253 µS/cm and SAR of 50. Furthermore, the concentrations of radionuclides, i.e. 232Th, 238U, 40K and 137Cs in the soil samples were found to be 11.02, 34.12, 544.45, and 1.6 Bq/kg, respectively. The concentrations of radionuclides were within the worldwide baseline, expect for 40K. The study concluded that both water sources are classified as very high salinity and sodium water (class C4-S4), and it cannot be used for irrigation, only suitable for the salt tolerant crops.
Źródło:
Journal of Ecological Engineering; 2021, 22, 2; 262-271
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The profiling of osmotic adjustment and water status in Apera intermedia exposed to salinity
Autorzy:
Yildiztugay, E.
Ozfidan-Konakci, C.
Kucukoduk, M.
Duran, Y.
Powiązania:
https://bibliotekanauki.pl/articles/80567.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
osmotic adjustment
water status
Apera intermedia
salinity
relative growth rate
relative water content
salt stress
thiobarbituric acid reactive substance
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of production of silver nanoparticles using soil fungi and its applications for reducing irrigation water salinity
Autorzy:
Yaseen, Rabaa
Kotp, Yousra H.
Eissa, Doaa
Powiązania:
https://bibliotekanauki.pl/articles/292300.pdf
Data publikacji:
2020
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
antimicrobial activity
dehydrogenase
mycoynthesized nano-silver
nitrate reductase
reverse osmosis
soil salinity
water desalination
Opis:
In the present work, the dried biomass of soil isolated fungus Eurotium cristatum was used for synthesizing silver nanoparticles (AgNPs). The synthesized AgNPs were spherical in shape with average diameter of 16.56 nm and displayed maximum absorbance at 418. Fourier transform infrared (FTIR) study indicated the presence and binding of proteins with myco-produced silver nanoparticles. The optimum conditions for AgNPs biosynthesis were found to be at temperature of 40°C, pH of 8.0, substrate concentration of 500 ppm and fungal biomass wt. of 0.8 g. The AgNPs showed antibacterial activity against Staphylococcus aureus, Listeria monocytogenes, Escherichia coli and Shigella flexneri. AgNPs was built-in thin film nanocomposite (TFNC) membrane and the impacts of nanomaterial composition on membrane properties and desalination process were studied. The AgNPs produced membrane TFNC had better filtration performances than pure thin film composite membrane TFC. The TFNC membrane had enhanced water flux (32.0 vs. 16.5 dm3∙m–2∙h–1) and advanced NaCl rejection (91.7 vs. 89%) compared to the TFC membrane. A pot experiment was conducted to evaluate the effect of the irrigation with desalinated water on yield and productivity of essential oil of the sweet basil (Ocimum basilicum L.) and lavender (Lavandula multifida L.). The irrigation with desalinated water reduced significantly the soil reaction, soil electrical conductivity (EC), sodium adsorption ratio and exchangeable sodium percent in rhizospheric soil, it also enhanced the growth and oil yield of both plants compared with those irrigated with salt water.
Źródło:
Journal of Water and Land Development; 2020, 46; 216-228
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water and Ionic Balance in the Leaves of Basket Willow (Salix viminalis L) Cultivated in Hydroponics with Different Salinity Levels
Bilans wodny oraz jonowy w liściach wierzby wiciowej (Salix viminalis L) uprawianej w kulturach wodnych o różnym stopniu zasolenia
Autorzy:
Wróbel, J.
Mikiciuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/389447.pdf
Data publikacji:
2010
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
hydroponika
zasolenie
Salix viminalis L.
bilans wodny
bilans jonowy
hydroponics
salinity
water balance
ionic balance
Opis:
In the study, a significant effect of different NaCl concentration in Hoagland’s medium was showed on the water and ionic balance in the leaves of three clones of Salix viminalis L., ie ‘Bjor’, ‘Jorr’ and ‘Tora’. The measurements of water indicators (RWC and WSD) as well as the content of monovalent (K+ and Na+) and bivalent (Ca2+ and Mg2+) cations in the leaves of basket willow clones allow to conclude that under high salinity of hydroponics with sodium chloride the ‘Bjor’ clone was characterised by more favourable water and ionic balance when compared with the ‘Jorr’ and ‘Tora’ clones, as well as by effective mechanism of decreasing the uptake of sodium ions in leaves under the highest salt concentration in the medium. The results indicate that the ‘Bjor’ clone is best adapted to survival under salt stress conditions.
W badaniach wykazano ważny wpływ zróżnicowanego stężenia NaCl w pożywce Hoaglanda na bilans wodny i jonowy w liściach trzech klonów Salix viminalis L.: 'Bjor', 'Jorr' i 'Tora'. Pomiary wskaźników wodnych RWC i WSD oraz zawartości kationów jednowartościowych (K+ i Na+) oraz dwuwartościowych (Ca2+ i Mg2+) w liściach klonów wierzby wiciowej pozwalają wnioskować, że w warunkach dużego zasolenia hydroponiki chlorkiem sodu klon 'Bjor' w porównaniu z klonami 'Jorr' i 'Tora' charakteryzował się korzystniejszym bilansem wodnym oraz jonowym, a także skutecznym mechanizmem zmniejszania pobierania jonów sodu w liściach w warunkach największego stężenia soli w podłożu. Wyniki badań wskazują, że klon 'Bjor' jest najlepiej przystosowany do przetrwania w warunkach stresu solnego.
Źródło:
Ecological Chemistry and Engineering. A; 2010, 17, 10; 1315-1321
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperatura i zasolenie przydennych warstw wody w zatokach fiordu Hornsund (SW Spitsbergen)
Temperature and salinity of bottom waters in bays of the Hornsund fjord (SW Spitsbergen)
Autorzy:
Wiśniewska-Wojtasik, B.
Powiązania:
https://bibliotekanauki.pl/articles/260852.pdf
Data publikacji:
2005
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
Hornsund
wody przydenne
temperatura wody
zasolenie wody
gęstość wody
bottom waters
water temperature
salinity of waters
density of water
Opis:
Obszary wewnętrznych zatok fiordu Hornsund stanowią zróżnicowane i podlegające dynamicznym zmianom środowisko. Badania nad temperaturą i zasoleniem zatok Hornsundu nie były dotychczas prowadzone systematycznie, ponadto koncentrowały się głównie na centralnej części fiordu. W pracy przedstawiono dane pomiarowe temperatury i zasolenia warstwy wody przydennej z dwóch sezonów letnich (2000 i 2002 r.) dla wybranych zatok przylodowcowych Hornsundu oraz przeprowadzono porównanie uzyskanych wyników. Stwierdzono zaznaczające się w tym okresie silne ocieplenie i wzrost zasolenia wód przydennych. Silne ocieplenie wód przydennych zaznaczyło się również w dłuższej skali czasowej (ostatnie 20-30 lat). Dane zebrano podczas prowadzenia prac związanych z badaniami zgrupowań meiobentosu zasiedlających zatoki fiordu.
The Hornsund fjord is located in the southwest part of Spitsbergen. This part is situated in the area of dynamic changes because of two periodically upcoming flows of water, warm West Spitsbergen current and cold East Spitsbergen current. These currents are changeable by means of their specific activities due to variable flow of some waters to the fjord that occur seasonally as well as in many years time. The changeability of physico-chemical conditions of the fjord waters have been monitored for many years by terms of warm years as well as seasonally. Despite of thorough literature conveying the issue of physico-chemical conditions of Isbjornhamna's waters there is not sufficient pieces of information tackling with some conditions that are in numerous bays in the depth of Hornsund fjord. During the biological research in Hornsund concerning inner bays in July of 2000 and 2002 year the measurement of temperature, salinity and conductivity of bottom layers of water were made. The research included the following bays: Brepollen by the forehead of Horn glacier, Hyrne glacier, Mendelejew glacier, by the eastern side of Treskelen peninsula, Samarinvagen, Adriabukta, Austre Burgerbukta, Gashamna and Isbjornhamna. The conducted analysis were done for the water layers that lie 1 meter over the bottom. The research was being done was that moment of intensive flows of glacier waters. The measurement were repeated in 2002, moreover almost for the same positions. When the research was being conducted the Hornsund fjord was under the influence of warm waters on the surface by West Spitsbergen current, according the analysis of the data of surface waters taken by NOAA-CIRES Climate Diagnostics Centre. As a result of the analysis conducted some great variability of water temperature and salinity for some bays and profiles has been found. For the given positions almost similar values were found by means of two research series (2000 and 2002). The results show indicate to the variability of water layers lied in the given glacier bays. The rise of temperature of bottom waters both in Isbjornhamna and Brepollen that has been noticed during the period of 20-30 years indicates constant warming. The results of various research as well as the conclusions about the long-term lasting warming of the bottom waters available from literature can provide evidence that during the period of 20-30 years there is a change of intensity of West Spitsbergen current. Thus there is a significant change and conversion of water mass filled Hornsund.
Źródło:
Problemy Klimatologii Polarnej; 2005, 15; 155-167
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quality of waters of Szczecin Lagoon and Pomeranian Bay
Jakość wód Zalewu Szczecińskiego i Zatoki Pomorskiej
Autorzy:
Wira, J.
Wira, D.
Powiązania:
https://bibliotekanauki.pl/articles/84958.pdf
Data publikacji:
2003
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
water quality
Szczecin Lagoon
Pomeranian Bay
Odra mouth
high fluctuation
fluctuation
chemical composition
river water
salinity
nitrate
nitrogen
total phosphorus
phosphorus
phytoplankton blooming
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2002-2003, 07
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biodiversity of the Arctic Ocean in the face of climate change
Autorzy:
Weslawski, J.M.
Powiązania:
https://bibliotekanauki.pl/articles/11979.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
biodiversity
Arctic Ocean
climate change
global climate change
Arctic sea
aquatic ecosystem
Arctic environment
sea water
water temperature
salinity level
Opis:
Global climate changes which has been observed over the recent years affects organisms occurring in the Arctic seas and the functioning of the whole maritime ecosystems there. The research note presents and briefly analyses the biological diversity of the Arctic Ocean and the most important factors which change the relations between organisms and the environment in the Arctic.
Źródło:
Papers on Global Change; 2011, 18
2300-8121
1730-802X
Pojawia się w:
Papers on Global Change
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oceanographic observations in the Nordic Sea and Fram Strait in 2016 under the IO PAN long-term monitoring program AREX
Autorzy:
Walczowski, W.
Beszczynska-Moller, A.
Wieczorek, P.
Merchel, M.
Grynczel, A.
Powiązania:
https://bibliotekanauki.pl/articles/48885.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Nordic Sea
Fram Strait
spatial distribution
salinity
water temperature
Atlantic water
physical oceanography
monitoring programme
Opis:
Since 1987 annual summer cruises to the Nordic Seas and Fram Strait have been conducted by the IO PAN research vessel Oceania under the long-term monitoring program AREX. Here we present a short description of measurements and preliminary results obtained during the open ocean part of the AREX 2016 cruise. Spatial distributions of Atlantic water temperature and salinity in 2016 are similar to their long-term mean fields except for warmer recirculation of Atlantic water in the northern Fram Strait. The longest observation record from the section N along 768300N reveals a steady increase of Atlantic water salinity, while temperature trend depends strongly on parametrization used to define the Atlantic water layer. However spatially averaged temperature at different depths indicate an increase of Atlantic water temperature in the whole layer from the surface down to 1000 m.
Źródło:
Oceanologia; 2017, 59, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution of phytoplankton along the thermohaline gradient in the North-Eastern Adriatic channel; winter aspect
Autorzy:
Vilicic, D.
Kuzmic, M.
Bosak, S.
Silovic, T.
Hrustic, E.
Buric, Z.
Powiązania:
https://bibliotekanauki.pl/articles/47482.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Adriatic Sea
chlorophyll
diatom
dinoflagellate
distribution
nutrient
oligotrophic water
phytoplankton composition
picoplankton
salinity
temperature
thermohaline
transition zone
water transparency
Opis:
The distribution of phytoplankton and its relation to the hydrographic features in the north-eastern Adriatic was investigated in February 2008. The area of interest included a thermohaline gradient in the channel situated between the coast and the islands lying parallel to the coast. The gradient is controlled by the influx of oligotrophic karstic riverine water at the south-eastern end,subma rine springs in the middle part,an d warmer offshore waters at the north-western end of the channel. The change of temperature and salinity in the estuarine transition zone was accompanied by abundant diatoms and dinoflagellates below the halocline,with dominant chain-forming diatoms (Chaetoceros, Bacteriastrum) in abundances reaching 5×105 cells dm−3. The impact of coastal submarine springs detected by infrared remote sensing resulted in the growth of cyanobacteria in the nitrogen-depleted surface waters. The greater contribution of picoplankton, as well as of nanoplanktonic coccolithophorids and cryptophytes,in the outer channel system indicated their preference for oligotrophic conditions. Flow cytometric counts of nanophytoplankton were 10–30 times greater than inverted microscope counts. Cyanobacteria were about five times more abundant than picoeukaryotes. The study demonstrates how different techniques (remote sensing and in situ investigations) can be useful in understanding the biological and hydrographic set-up in the specific oligotrophic eastern Adriatic coastal environment.
Źródło:
Oceanologia; 2009, 51, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary Phytotoxicity Test on Salinity Against Mangrove Plants of Rhizophora mucronata
Autorzy:
Titah, Harmin Sulistiyaning
Purwanti, Ipung Fitri
Pratikno, Herman
Chimayati, Rachmi Layina
Handayanu, -
Powiązania:
https://bibliotekanauki.pl/articles/952465.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
bio-desalination
brackish water
mangrove
salinity
preliminary phytotoxicity
Opis:
The phytotechnology concept that is applied for a bio-desalination reactor become a new desalination technology. The desalination technology can be called as bio-desalination technology to remove ions of Na+ and Cl- in brackish or saline water using mangrove plant. Before the mangrove plants were used in bio-desalination technology, the preliminary phytotoxicity test was conducted. The purpose was to determine the salinity concentration at which the mangrove species of Rhizophora mucronata can survive. The preliminary phytotoxicty test was carried out using a plastic reactor that was designed as a reed bed system. The reactors filled with gravel, sand, and artificial saline water. The variation of the NaCl concentrations were 0 mg/L as control, 10,000; 20,000; 30,000; 40,000, and 50,000 mg/L. The physical observation of the survival condition of Rhizophora mucronata was carried out during the preliminary test for 7 days. The analysis of Scanning Electron Microscopy (SEM) on Rhizophora mucronata was conducted at the end of exposure. The results showed that Rhizophora mucronata could not survive at the concentrations of 40,000 and 50,000 mg/L. Rhizophora mucronata changed the color of the leaves to brown and the stems become softer. Multiple cell damage and the decreasing trend of sodium and chloride amounts occured on roots and stems at the salinity concentration of 50,000 mg/L. In conclusion, the high of salinity concentration (> 30,000 mg/L) can be toxic to Rhizophora mucronata.
Źródło:
Journal of Ecological Engineering; 2019, 20, 3; 126-134
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of shelf-transformed waters (STW) on foraminiferal assemblages in the outwash and glacial fjords of Adventfjorden and Hornsund, Svalbard
Autorzy:
Szymanska, N.
Pawlowska, J.
Kucharska, M.
Kujawa, A.
Lacka, M.
Zajaczkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/48678.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Atlantic water
foraminiferal assemblage
glacial fjord
outwash fjord
Adventfjorden
Hornsund
Svalbard
inflow water
salinity
water temperature
environment change
Opis:
A new dataset of benthic foraminiferal assemblages from Adventfjorden (tributary fjord of Isfjorden, West Spitsbergen) was compared with the results of a study conducted by Zajączkowski et al. (2010) in Hornsund (West Spitsbergen). According to Nilsen et al. (2016), Atlantic water inflow to the Isfjorden Trough occurs more readily than to anywhere else along the shelf of Spitsbergen; thus, we compared the foraminiferal assemblages of the outwash Adventfjorden fjord, located in the Isfjorden system, with glacial Hornsund, located in southwest Spitsbergen. Despite the juxtaposition of Adventfjorden and Hornsund the data revealed varying impacts of shelf-transformed water (STW) on the benthic foraminiferal assemblages. Outer and central Adventfjorden was dominated by Adercotryma glomerata, Recurvoides turbinata and Spiroplectammina sp., reflecting the presence of STW, while abundant Melonis barleeanus in the central area of the fjord indicated a large flux of unaltered organic matter. Only the head of the fjord was dominated by the glaciomarine taxa Cassidulina reniforme and Elphidium clavatum. Foraminiferal fauna characteristic of STW-influenced environments (i.e., Nonionellina labradorica and R. turbinata) were also observed in outer Hornsund. However, the glacier-proximal taxa E. clavatum and C. reniforme were dominant throughout the fjord, demonstrating the impacts of meltwater and high sedimentation. Therefore, it is likely that in Hornsund, glacial impact is a major environmental factor, which is stronger than the influence of STW.
Źródło:
Oceanologia; 2017, 59, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustically measured diurnal vertical migration of fish and zooplankton in the Baltic Sea - seasonal variations
Autorzy:
Szczucka, J.
Powiązania:
https://bibliotekanauki.pl/articles/48748.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
zooplankton
fish
temperature
acoustic measurement
marine organism
physical structure
diurnal migration
vertical migration
seasonal variation
water
salinity
Baltic Sea
Opis:
Acoustic measurements were conducted at different seasons in the last five years at a fixed point of the Baltic Sea at a frequency 30 kHzcon currently with temperature and salinity sampling. Echosounding records were used to determine the seasonal and diurnal migration patterns of scattering layers in accordance with thermohaline conditions. Different seasonal patterns of nocturnal aggregations of organisms dependent on the temperature gradient in the thermocline were found. This paper illustrates the diurnal distributions of sound scattering layers and analyses the way they are linked to the physical structure of the water.
Źródło:
Oceanologia; 2000, 42, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Meteorological influences on the surface hydrographic patterns of the North Aegean Sea
Autorzy:
Sylaios, G.
Powiązania:
https://bibliotekanauki.pl/articles/48232.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
water mass
Baltic Sea
Aegean Sea
sea water
hydrographic data
wind stress
bottom topography
meteorological influence
hydrographic pattern
Anthos Peninsula
salinity
Opis:
Hydrographic data from the North Aegean Sea were used to examine the summer variability of surface water masses during the period 1998–2001. Attention was placed on the surface hydrographic features of the area, such as the Black Sea Water (BSW) plume expansion, the frontal characteristics of the BSW with the Levantine Intermediate Water (LIW) and the variability of submesoscale hydrographic features (such as the Samothraki Anticyclone). Strong southerly wind stresses were found responsible for relaxing the horizontal density gradients across the BSW-LIW frontal zone and displacing this front to the north of Lemnos Island, thus suppressing the Samothraki Anticyclone towards the Thracian Sea continental shelf. Under northerly winds, the BSW-LIWfront returns to its regular position (south of Lemnos Island), thus allowing the horizontal expansion of the Samothraki gyre up to the Athos Peninsula. Present results indicate the importance of medium-term wind stress effects on the generation of Samothraki Anticyclone suppression/expansion events.
Źródło:
Oceanologia; 2011, 53, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature and salinity of surface water at a coastal measuring point, Isbjörnhamna, Spitsbergen
Autorzy:
Swerpel, Sławomir
Powiązania:
https://bibliotekanauki.pl/articles/2053282.pdf
Data publikacji:
1987
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
sea water
temperature and salinity
Źródło:
Polish Polar Research; 1987, 8, 1; 57-64
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combined impact of summer heat waves and coastal upwelling in the Baltic Sea
Autorzy:
Suursaar, U.
Powiązania:
https://bibliotekanauki.pl/articles/2079092.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
global warming
heat wave
coastal upwelling
water temperature
salinity
satellite image
Finland Gulf
Baltic Sea
Opis:
Under warming climates, heat waves (HWs) have occurred in increasing intensity in Europe. Also, public interest towards HWs has considerably increased over the last decades. The paper discusses the manifestations of the summer 2014 HW and simultaneously occurring coastal upwelling (CU) events in the Gulf of Finland. Caused by an anticyclonic weather pattern and persisting easterly winds, CUs evolved along the southern coast of the Gulf in four episodes from June to August. Based on data from coastal weather stations, 115 days-long measurements with a Recording Doppler Current Profiler (RDCP) oceanographic complex and sea surface temperature (SST) satellite images, the partly opposing impacts of these events are analysed. Occurring on the background of a marine HW (up to 26°C), the CU-forced SST variations reached about 20 degrees. At the 10 m deep RDCP mooring location, a drop from 21.5 to 2.9°C occurred within 60 hours. Salinity varied between 3.6 and 6.2 and an alongshore coastal jet was observed; the statistically preferred westerly current frequently flowed against the wind. Locally, the cooling effect of the CUs occasionally mitigated the overheating effects by the HWs both in the sea and on the marine-land boundary. However, in the elongated channel-like Gulf of Finland, upwelling at one coast is usually paired with downwelling at the opposite coast, and simultaneously or subsequently occurring HWs and CUs effectively contribute to heat transfer from the atmosphere to the water mass. Rising extremes of HWs and rapid variations by CUs may put the ecosystems under increasing stress.
Źródło:
Oceanologia; 2020, 62, 4PA; 511-524
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 93

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