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Effect of Tide on Temporal and Spatial Distribution of Some Physical and Chemicals Parameters in the Shallow Estuary of the Kienke River (Kribi Deep Sea Port Area, South Cameroon Coast)

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Open Journal of Marine Science 2022年第4期12卷 185-199页

作者： Anselme Crépin Mama Willy Karol bodo Abouga Félix Besack Firmin Landry Tadoum Bah Stéphane Onla Jennifer Cynthia Rachel Sissako Mongue Frédéric Nkolo Mfoula Fabius Kouegan Durand Bernadin Djombe Kammen Dorine Mara Ngo Nola Ginette Thérèse Atoukoh Dingong Laeticia Ingrig Ntangyong Gervais Mani Rose Eulalie Bekono Beyala Josué Junior Manga Tchogom Elcy Rhode Guiadem Lawrence Mbeng Oben Department of Oceanography Institute of Fisheries and Aquatic Sciences The University of Douala Douala Cameroon Association of Professionals in Coastal and Aquatics Management Kribi Cameroon Hydrography Service Dredging Management Unit Port Authority of Douala Douala Cameroon

The aim of this study was to highlight the effect of tide on the variation of the physicochemical parameter in the Kienké estuary. Six (06) environmental variables were monitored at nine (09) stations with the time step of one hour from 7 am to 7 pm on 4th August 2019. The hovmuller analysis showed that salinity, conductivity, total dissolved solids, and pH values increased during the flood phase and decreased during the ebb phase while oxygen concentration decreased during the flood and increased during the ebb phase. The stratification parameter has shown that the influx of seawater during high tide shifts the Kienké estuary from a well-mixed to a partially mixed environment.

关键词： Kienké Estuary Environmental Variables Flood Ebb Stratification Parame-ter

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Features of the F3 laver in the low-latitude ionosphere at sunset

Features of the F3 laver in the low-latitude ionosphere at s...

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中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Biqiang Zhao,Weixing Wan,bodo Reinisch,Xinan Yue,Huijun Le,Jing Liu, and Bo Xiong 1 Beijing National Observatory of Space Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China. 2 State Key Laboratory of Space Weather,Chinese Academy of Sciences, Beijing,China. 3 Center for Atmospheric Research,University of Massachusetts Lowell,Lowell,Massachusetts,USA. 4 Lowell Digisonde International,LLC,Lowell,Massachusetts,USA. 5 COSMIC Program Office,University Corporation for Atmospheric Research,Boulder,Colorado,USA. 6 Graduate University of Chinese Academy of Sciences,Beijing,China.

[1]The F layer is a common feature within±10°of the magnetic equatorial ionosphere in the *** to Balan et al.(1998) the F layer occurs mainly during the morning-noon period due to the combined effect of the upward E×B drift and the neutral wind that provides upward plasma drifts at and above the F *** F layer occurrence rate is higher in summer and decreases with increasing solar *** this study,the characteristic of the sunset F layer is first investigated using a solar cycle of ionosonde data (1995-2010) from the magnetic equatorial station at Jicamarca,and compared with the features derived from the four subtropical stations at Sao Luis,Fortaleza,Kwajalein,and *** shows that the local time distribution of the occurrence of the F layer can extend to the postsunset time(1800-2100 local time).The sunset F layer has a strong seasonal dependence occurring mainly during the *** the daytime F layer, the occurrence of the sunset F layer clearly increases and the virtual height of the bottom side of the F layer statistically increases from 620 to 1000 km with increasing solar activity. In addition,the occurrence of the sunset F layer at the other stations is much less than that at *** features of the dependence on the season,solar activity,and latitude are clearly related to the geomagnetic control of the evening prereversal enhancement of the equatorial zonal electric field and geomagnetic configuration.

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Effect of Tide on Temporal and Spatial Distribution of Some Physical and Chemicals Parameters in the Shallow Estuary of the Kienke River (Kribi Deep Sea Port Area,South Cameroon Coast)

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Open Journal of Marine Science（海洋科学期刊） 2022年第4期

作者： anselme crépin mama willy karol bodo abouga félix besack firmin landry tadoum bah stéphane onla jennifer cynthia rachel sissako mongue frédéric nkolo mfoula fabius kouegan durand bernadin djombe kammen dorine mara ngo nola ginette thérèse atoukoh dingong laeticia ingrig ntangyong gervais mani rose eulalie bekono beyala josué junior manga tchogom elcy rhode guiadem lawrence mbeng oben

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