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On the Development of Spatial/Temporal Solar UV Irradiation Maps: A Case Study in pernambuco State (Northeast of Brazil)

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Journal of Geographic Information System 2023年第6期15卷 597-610页

作者： Chigueru Tiba Verônica Wilma Bezerra Azevêdo Nuclear Energy Department Federal University of Pernambuco Recife Brazil Environmental and Urban Management Department Campo Grande City Hall Campo Grande Brazil

This work summarizes recently published information on the solar UV broadband irradiation of pernambuco, Northeast of Brazil. We describe the spatial and temporal distribution of solar UV radiation and its relationship with climatic and geographical conditions. Statistical experimental correlation between solar total irradiation and UV broadband obtained for 03 locations was generalized by the use of Koppen-Geiger Climatic criterium, which was used for mapping the spatial/temporal distribution of broadband UV. The climatological solar radiations used in the correlations were obtained by modeling through satellite and previously verified with terrestrial data. We present one map with the location of the recording stations where the statistical correlations were measured, one annual and 12 monthly contour maps describing monthly daily solar UV radiation levels throughout the territory of pernambuco. The solar UV irradiation (“broadband”) annual-average daily value in the State of pernambuco varied from 226 to 268 Wh/m2. Seasonal variation of solar UV irradiation in the State of pernambuco follows, in general and as expected, the climate, relief and seasons of the year. The highest value of monthly solar UV irradiation was observed in the central south region of the state, more precisely in Belém do São Francisco, Floresta, Ibimirim and Buíque in the month of December (summer), with 311.8 Wh/m2. The lower value was found in the south Agreste region, in Garanhuns and Caruaru, in the month of June (winter), with 162.2 Wh/m2.

关键词： Solar UV Irradiation Statistical Model Contour Maps Monthly and Annual UV pernambuco

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Sedimentary Organic Matter Characterization on a Tropical Continental Shelf in Northeastern Brazil

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International Journal of Geosciences 2020年第6期11卷 393-419页

作者： Roberto Lima Barcellos Maria Cristina da Silva Sales de Melo Alcides Nobrega Sial Valdir do Amaral Vaz Manso Labogeo/GSGMar Oceanography Department Federal University of Pernambuco Recife Brazil LGGM Geology Department Federal University of Pernambuco Recife Brazil NEG-Labise Geology Department Federal University of Pernambuco Recife Brazil

In continental shelf areas works where the focus is Geochemistry are widely relevant, due to the vast complexity and uses of these relief features (social, environmental and economic). On the Brazilian Northeast tropical shelves, with emphasis on the pernambuco Continental Shelf (PCS), the published studies are limited and have aimed at portions closer to the coastline. The objective of the present work is the description of the characteristics and origin of sedimentary organic matter (SOM) in the inner and middle pernambuco shelf, defining and classifying the local geochemical sedimentary facies. The sampling stations (136) were collected in the study area, and the grain-size, contents of total organic matter (TOM), calcium carbonate (CaCO3) were analyzed. The samples were processed in an elemental analyzer coupled with a mass spectrometer after the elimination of calcium carbonate. The obtained data were the grain-size, TOM, CaCO3, elemental (C, N) and the stable isotopic ratios of δ13C e δ15N of SOM. Based on the measured values of carbon and nitrogen, the C/N ratio, associated to δ13C e δ15N, is observed that in the PCS predominates an organic matter of marine origin along its entire length: C < 1%, N < 1%, C/N < 5, <

关键词： Biogenic Sediments Total Nitrogen δ13C Stable Isotopic Ratio Geochemical Facies pernambuco

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