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Is it possible to use "twin cores" as a unique sedimentary record? An experimen...
Veiga-Pires, C.; Mestre, NéliaSedimentary cores are widely used for studying Quaternary records. However, the amount of sediment that is available is proportional to the diameter of the core, which is rarely bigger than 15 cm. One way to obtain more sediment is to use two cores retrieved from almost the same location and use them as if they represent a unique sedimentary record. In the present work, an experimental design has been applied t...
Working with spectrophotometry on sedimentary cores from estuaries of south Por...
Veiga-Pires, C.; Mestre, Nélia; Moura, Delminda; Boski, T.The study of estuarine sediments to document Late Quatemary coastal changes had always benn of extreme importance, as they reflect the combination of sea-level and sedimentary changes, either at a local, regional or global scale.(...)
An attempt to use CIE Lab digital colour to study sediment profiles from the Al...
Veiga-Pires, C.; Mestre, Nélia; Moura, Delminda; Martins, H.; Boski, T.The study of estuarine sedimentary records is of great interest for paleo-environmental and paleo-climatologic reconstructions, because they represent environments that are sensitive to sea level and climatic variations, and also because they are characterized high sedimentary rates. However, due to the price and time needed to analyze the geochemical composition of sediments, it is very difficult to obtain pro...
An attempt to use color as a tool for high resolution correlations between estu...
Mestre, Nélia; Veiga-Pires, C.Nowadays, paleoenvironmental and climatological researches focus on studying shortterm climatic changes and one of the more sensitive environments for recording those short-term climatic variations are the high sedimentation rate of coastal regions. Accordingly, 4 estuaries from the Algarve region, south of Portugal, have been cored in order to study sedimentary and climatic variations during recent times (c.a....
An attempt to develop spectrophotometry as a proxy for sedimentary studies in e...
Veiga-Pires, C.; Mestre, Nélia; Moura, Delminda; Luis, Joaquim; Boski, T.In deep-sea sediment studies, reflectance has been used as a proxy for high vs. low productivity intervals for several years. This value of the white-black scale is obtained through the use of spectrophotometers when using the CIE Lab color system, which also gives values on green-red and blue-yellow scales. In estuarine/continental sediment studies, color data are still often based on Munsell Table which does n...
Algarve: a study case for global vs regional climatic changes in mid latitude e...
Veiga-Pires, C.; Mestre, Nélia; Moura, Delminda; Luis, Joaquim; Boski, T.Located at the extreme southwestern end of the Iberian Peninsula, in the South of Portugal, the Algarve province is bordered to the north by the Alentejo province, to the east by the Guadiana River, and to the west and south by the Atlantic Ocean. Its coastal region can be divided into two different sectors: the eastern sector, which is mainly made of barrier island and lagoon system named the Ria Formosa, and ...
Correlation of estuarine sedimentary cores based on color analysis: an example ...
Mestre, Nélia; Veiga-Pires, C.Coastal zones play a significant role in the regional development and have been an important area for human occupation through time. The study of estuarine sediments applied to sea level changes had always been of extreme importance, as it reflects the coastal line evolution, either by local, regional or global changes.
Regional sea level change study based on estuarine sediment color and biogeoche...
Mestre, Nélia; Veiga-Pires, C.Coastal zones play a significant role in the regional development and have been an important area for human occupation through time. The study of estuarine sediments applied to sea level changes had always been of extreme importance, as it reflects the coastal line evolution, either by local, regional or global changes.
Estudo da biogeoquímica dos sedimentos estuarinos através da cor: Resultados pr...
Mestre, Nélia; Veiga-Pires, C.As zonas costeiras desempenham um papel importante no desenvolvimento das regiões e ao longo dos séculos foram locais privilegiados para a ocupação humana. O estudo de sedimentos estuarinos aplicado à evolução do nível do mar ao longo dos tempos é de extrema importância, pois reflecte avanços e recuos da linha de costa originados por variações climáticas, quer a nível mundial, quer a nível regional e local.
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