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    Wyświetlanie 1-4 z 4
    Tytuł:
    Tide and mean sea level trend in the West coast of the Arabian Gulf from tide gauges and multi-missions satellite altimeter
    Autorzy:
    Siddig, N.A.
    Al-Subhi, A.M.
    Alsaafani, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/47757.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    sea level
    Arabian Gulf
    West coast
    gauge
    satellite altimetry
    Źródło:
    Oceanologia; 2019, 61, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Validation and statistical analysis of the group for high resolution sea surface temperature data in the Arabian Gulf
    Autorzy:
    Nesterov, O.
    Temimi, M.
    Fonseca, R.
    Nelli, N.R.
    Addad, Y.
    Bosc, E.
    Abida, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078874.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    validation
    statistical analysis
    sea surface temperature
    annual variability
    seasonal variability
    Arabian Gulf
    Oman Sea
    Opis:
    The combined effect of climate change and steadily increasing seawater demand for industrial and domestic purposes in the Arabian Gulf region has a significant impact on the ecosystem in this region. Additionally, this effect may reduce the efficiency and increase the operating costs of industrial facilities that utilize seawater for cooling and other purposes. In this context, it is important to know various statistical characteristics of the sea surface temperature (SST) and their trends, in addition to the mean climatological characteristics. The analysis conducted in this study utilized a 17-year Group for High Resolution Sea Surface Temperature Level 4 dataset of 0.01 × 0.01° spatial resolution. First, the dataset was compared against a 2-year seawater temperature measurements at the ten offshore buoys in the relatively shallow coastal waters of the United Arab Emirates between Ras Ghumais and Dubai, which showed a reasonably good agreement between the two datasets, with the estimated root mean square deviations ranging from 0.5 to 0.9°C. Subsequently, several statistical SST characteristics were calculated. The trend analysis showed not only positive tendencies in the mean SSTs of up to 0.08°C/year in the northern Gulf, but also the trends in the annual percentile exceedances, particularly the 95th percentiles (near-maximum SSTs), which increased by approximately 0.07°C/year in the western United Arab Emirates and eastern Qatar waters. On the contrary, the 5th percentiles (near-minimum SSTs) decreased by up to 0.1°C/year, especially in the waters around Bahrain, Qatar, and the western United Arab Emirates. These results indicate that extreme hot and cold SST events in the Gulf are becoming more frequent and more extreme than before.
    Źródło:
    Oceanologia; 2021, 63, 4; 497-515
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Observed variability in physical and biogeochemical parameters in the Central Arabian Gulf
    Autorzy:
    Rakib, F.
    Al-Ansari, E.M.A.S.
    Husrevoglu, Y.S.
    Yigiterhan, O.
    Al-Maslamani, I.
    Aboobacker, V.M.
    Vethamony, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078929.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    economic zone
    Arabian Gulf
    vertical variability
    spatial variability
    temporal variability
    water column
    dissolved oxygen
    hydrography
    chlorophyll a
    Opis:
    In situ measurements of physical and biogeochemical variables were conducted along a transect in the Exclusive Economic Zone (EEZ) of Qatar during late summer (September 2014) and winter (January 2015) to investigate their vertical, spatial and temporal variability. The study reveals that the water column is characterized by strong stratification during late summer in the deepest station, where the water depth is around 65 m and the surface to bottom temperature variation is around 9.1°C. The water column is vertically homogeneous during winter due to surface cooling and wind mixing. The surface to 23 m water column is characterized by ample dissolved oxygen (DO) during late summer and winter in the offshore regions, however, relatively low DO is found during late summer due to weak mixing and advection under weak winds and currents. Dissolved oxygen drops to hypoxic levels below the summer thermocline, and the winter high DO layer extends up to the bottom. Chlorophyll-a (Chl-a) is relatively high during late summer in the offshore region, while that in the nearshore regions is very low, which is linked to the anthropogenic stresses from the central east coast of Qatar. The results identified in this study fill an essential gap in the knowledge of regional primary production dynamics.
    Źródło:
    Oceanologia; 2021, 63, 2; 227-237
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tidal characteristics in the Gulf of Khambhat, Northern Arabian Sea — based on observation and global tidal model data
    Autorzy:
    Mitra, A.
    Kumar, V.S.
    Jena, B.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079079.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    tidal model
    sea level
    wind
    bathymetry
    MIKE21 model
    FES2014 model
    Khambhat Gulf
    Arabian Sea
    Opis:
    Tidal characteristics of the Gulf of Khambhat are described based on measured and modelled sea-level data. Data were recorded at three locations inside and two locations outside the Gulf with record lengths of 6–12 months to study the tidal propagation. A northward increase in tidal amplitude is noticed from Daman (eastern side) and Diu (western side) and attains maxima at Bhavnagar. A similar trend is followed by the amplitude of the major tidal constituents, although there are discrepancies for that of the minor constituents. The non-tidal factor which influences the sea-level is the local wind, especially the alongshore component of wind. A positive correlation is obtained between the sea-level and the meridional component of wind at each location. Harmonic analysis of sea-level data shows that M2 is the major tidal constituent which propagates in a non-linear fashion inside the Gulf. Tides from two global tide models (MIKE21 and FES2014) have been compared with the measured data, which could be used for further prediction of the tides and sediment transport in the Gulf. The tide elevation derived from the MIKE21 model has further been used for the harmonic analysis of tide. The tides predicted using one-month data are up to 10% smaller than those predicted using the one-year data. The global tide model FES2014 data performs well with measured data for offshore locations, whereas it fails to predict the same for the inner Gulf locations. The study manifests the fact that to understand the dynamics of complex tidal areas, regional models should better be used than global tidal models.
    Źródło:
    Oceanologia; 2020, 62, 4PA; 443-459
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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