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  • Salinity  (3)
  • Atmosphere-ocean system  (1)
  • American Meteorological Society  (2)
  • National Institute of Oceanograhy and Fisheries (NIOF)  (1)
  • Nigerian Institute for Oceanography and Marine Research  (1)
  • Springer Nature
  • 2005-2009  (4)
  • 1975-1979
Collection
Keywords
Publisher
Years
Year
  • 1
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    Using Temperature–Salinity Relations in a Global Ocean Implementation of a Multivariate Data Assimilation Scheme (2008)
    American Meteorological Society
    Details
    Publication Date: 2017-04-04
    Description: In this paper results from the application of an ocean data assimilation (ODA) system, combining a multivariate reduced-order optimal interpolator (OI) scheme with a global ocean general circulation model (OGCM), are described. The present ODA system, designed to assimilate in situ temperature and salinity observations, has been used to produce ocean reanalyses for the 1962–2001 period. The impact of assimilating observed hydrographic data on the ocean mean state and temporal variability is evaluated. A special focus of this work is on the ODA system skill in reproducing a realistic ocean salinity state. Results from a hierarchy of different salinity reanalyses, using varying combinations of assimilated data and background error covariance structures, are described. The impact of the space and time resolution of the background error covariance parameterization on salinity is addressed.
    Description: This work has been funded by the ENACT Project (Contract EVK2-CT2001-00117) for A. Bellucci and P. Di Pietro, and partially by the ENSEMBLES Project (Contract GOCE-CT-2003-505539) for A. Bellucci.
    Description: Published
    Description: 3785-3807
    Description: 3.7. Dinamica del clima e dell'oceano
    Description: JCR Journal
    Description: reserved
    Keywords: ocean modelling ; data assimilation ; reanalysis ; upper ocean variability ; temperature ; Salinity ; 03. Hydrosphere::03.01. General::03.01.04. Ocean data assimilation and reanalysis
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
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    The Role of the Land Surface Background State in Climate Predictability (2005)
    American Meteorological Society
    Details
    Publication Date: 2021-05-19
    Description: Skill in ensemble-mean dynamical seasonal climate hindcasts with a coupled land-atmosphere model and specified observed sea surface temperature is compared to that for long multi-decade integrations of the same model where the initial conditions are far removed from the seasons of validation. The evaluations are performed for surface temperature and compared among all seasons. Skill is found to be higher in the seasonal simulations than the multi-decadal integrations except during boreal winter. The higher skill is prominent even beyond the first month when the direct influence of the atmospheric initial state elevates model skill. Skill is generally found to be lowest during the winter season for the dynamical seasonal forecasts, equal to that of the long integrations, which show some of the highest skill during winter. The reason for the differences in skill during the non-winter months is attributed to the severe climate drift in the long simulations, manifest through errors in downward fluxes of water and energy over land and evident in soil wetness. The drift presses the land surface to extreme dry or wet states over much of the globe, into a range where there is little sensitivity of evaporation to fluctuations in soil moisture. Thus, the land-atmosphere feedback is suppressed, which appears to lessen the model’s ability to respond correctly over land to remote ocean temperature anomalies.
    Description: Center for Ocean-Land-Atmosphere Studies
    Description: Published
    Keywords: Atmosphere-ocean system
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
    Format: 503454 bytes
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  • 3
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    Spatio-temporal variations of zooplankton community in the hypersaline lagoon of Bardawil, North Sinai, Egypt (2007)
    National Institute of Oceanograhy and Fisheries (NIOF)
    Details
    Publication Date: 2021-05-19
    Description: Bardawil Lagoon is a shallow oligotrophic hypersaline lake, located at the northern periphery of Sinai peninsula-Egypt, connected to SE Mediterranean Sea through two main openings known as Boughazes. Distribution of zooplankton in Bardawil Lagoon during 2004 was studied, not only in space and time but also with reference to species assemblages and environmental factors. Copepoda, Protozoa, and Mollusca were dominating the lagoon zooplankton community during the period of study with 58 identified forma. Zooplankton stock peaked during August and October with severe depletion in spring. Spatially, the maximum density occurred near the sea opening I. The lowest density and species richness were noticed at stations with high salinity. The community composition was highly changed with time series. Twenty new taxa were recorded during the study, whereas thirty three taxa disappeared from the lagoon along twenty years.
    Description: تعتبر جونة البردويل بحيرة عالية الملوحة، فقيرة فى الانتاجية الاولية، وقليلة العمق. وتقع هذه الجونة فى اقصى شمال جزيرة سيناء-مصر. وتتصل بجنوب شرق البحر المتوسط من خلال فتحتين. وقد تمت دراسة توزيع الهائمات الحيوانية خلال عام 2004 شهريا. وسجل 58 نوعا من الهائمات الحيوانية. وكانت مجدافيات الارجل والاوليات الحيوانية والرخويات هى الاكثر سيادة فى البحيرة. وبخاصة فى شهرى أغسطس وأكتوبر، بينما كان هناك فقر كبير فى كثافة هذه الكائنات فى ربيع ذلك العام. كما كانت أعلى كثافة للهائمات الحيوانية فى المحطات القريبة من البوغاز الغربى. وبينت الدراسة ان الملوحة كانت هى العامل المُحدد لتغير كثافة وتنوع الهائمات الحيوانية حيث تناسبت معها عكسيا. ظهر عشرون نوعا فى جونة البردويل أثناءالدراسة لم يتم تسجيلهم من قبل بينما اختفى ثلاثة وثلاثون نوعا على مدار عشرون عاما.
    Description: The Chief Editor: Prof. Fatma Aly Abd El-Razek E-mail: fatma_abdelrazek@hotmail.com
    Description: Published
    Description: Hypersaline lagoon
    Keywords: Hydrobiology ; Zooplankton ; Salinity ; Zooplankton ; Salinity ; Lagoons
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
    Format: 210540 bytes
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  • 4
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    Seasonal variation in surface temperature and salinity around Lagos harbour, Nigeria. (2006)
    Nigerian Institute for Oceanography and Marine Research | Lagos, Nigeria
    Details
    Publication Date: 2021-05-19
    Description: Continuous monitoring of Sea and Harbour (Lagoon) Surface temperature and salinity at two stations has been carried out from 1978 to 1981. This paper presents the findings for the period and relates it to the prevailing meteorological regimes. The pattern of sea surface temperature at Victoria beach in the study period shows a clearly defined mean maximum temperature of 29.34oC in April, and clearly defined mean minimum temperature of 25.63 in August. Depending on the year, there may be a less clearly defined mean maximum and minimum temperature in October/November and in January respectively. The pattern of surface temperature in the Harbour station is basically similar. The salinity cycle especially in the Harbour was found to be critically dependent on rainfall. Practical salinity values as low as zero was recorded in the Harbour during the rainy season while in the dry season, values greater than 30.0 were sometimes recorded. The effect of rainfall on sea surface salinity was expectedly less significant.
    Description: NIOMR, LAGOS
    Description: Published
    Keywords: Salinity ; Surface water ; Oceanography ; Harbours ; Surface temperature ; Surface salinity
    Repository Name: AquaDocs
    Type: Report , Non-Refereed
    Format: 2169641 bytes
    Format: application/pdf
    Format: 20pp.
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