Compilation of downward flux observations from sediment trap deployments in the Atlantic Ocean - Contribution to EURO-BASIN's Data integration

We provide a compilation of downward fluxes (total mass, POC, PON, BSiO2, CaCO3, PIC and lithogenic/terrigenous fluxes) from over 6000 sediment trap measurements distributed in the Atlantic Ocean, from 30 degree North to 49 degree South, and covering the period 1982-2011. Data from the Mediterranean Sea are also included. Data were compiled from different sources: data repositories (BCO-DMO, PANGAEA), time series sites (BATS, CARIACO), published scientific papers and/or personal communications from PI's. All sources are specifed in the data set. Data from the World Ocean Atlas 2009 were extracted to provide each flux observation with contextual environmental data, such as temperature, salinity, oxygen (concentration, AOU and percentage saturation), nitrate, phosphate and silicate.

Particle flux in the NE Atlantic as recorded by sediment traps

Downward particle flux was measured using sediment traps at various depths over the Porcupine Abyssal Plain (water depth ab. 4850 m) for prolonged periods from 1989 to 1999. A strong seasonal pattern of flux was evident reaching a maximum in mid-summer. The composition of the material changed with depth, reflecting the processes of remineralisation and dissolution as the material sank through the water column. However, there was surprisingly little seasonal variation in its composition to reflect changes in the biology of the euphotic zone. Currents at the site have a strong tidal component with speeds almost always less than 15 cm/sec. In the deeper part of the water column they tend to be northerly in direction, when averaged over periods of several months. A model of upper ocean biogeochemistry forced by meteorology was run for the decade in order to provide an estimate of flux at 3000 m depth. Agreement with measured organic carbon flux is good, both in terms of the timings of the annual peaks and in the integrated annual flux. Interannual variations in the integrated flux are of similar magnitude for both the model output and sediment trap measurements, but there is no significant relationship between these two sets of estimates. No long-term trend in flux is evident, either from the model, or from the measurements. During two spring/summer periods, the marine snow concentration in the water column was assessed by time-lapse photography and showed a strong peak at the start of the downward pulse of material at 3000 m. This emphasises the importance of large particles during periods of maximum flux and at the start of flux peaks. Time lapse photographs of the seabed show a seasonal cycle of coverage of phytodetrital material, in agreement with the model output both in terms of timing and magnitude of coverage prior to 1996. However, after a change in the structure of the benthic community in 1996 no phytodetritus was evident on the seabed. The model output shows only a single peak in flux each year, whereas the measured data usually indicated a double peak. It is concluded that the observed double peak may be a reflection of lowered sediment trap efficiency when flux is very high and is dominated by large marine snow particles. Resuspension into the trap 100 m above the seabed, when compared to the primary flux at 3000 m depth (1800 mab) was lower during periods of high primary flux probably because of a reduction in the height of resuspension when the material is fresh. At 2 mab, the picture is more complex with resuspension being enhanced during the periods of higher flux in 1997, which is consistent with this hypothesis. However there was rather little relationship to flux at 3000 m in 1998. At 3000 m depth, the Flux Stability Index (FSI), which provides a measure of the constancy of the seasonal cycle of flux, exhibited an inverse relationship with flux, such that the highest flux of organic carbon was recorded during the year with the greatest seasonal variation.

A influência das audiências públicas na formulação da Lei nº 11.096/2005 - Prouni

Análise das audiências públicas realizadas para debater o projeto do PROUNI - Programa Universidade para Todos - no período de 26 de maio de 2004 a 22 de junho de 2004 com o objetivo de verificar a influência das audiências públicas na Lei º 11.096/2005. Compara o Projeto de Lei, encaminhado pelo Governo Federal, às propostas dos atores nas audiências públicas e o que foi aprovado ao final do processo, comprovando que a audiência pública é um mecanismo de participação popular importante na elaboração legislativa e na efetivação de políticas públicas.

Diário da Constituinte [gravação de vídeo] : [programa n. 096]

A preocupação de alguns constituintes é com o tamanho da nova Carta. Adroaldo Strek (PDT-RS) acha que, na Comissão de Sistematização da Assembleia Nacional Constituinte (ANC), haverá um enxugamento do texto. Humberto Lucena (PMDB-PB), presidente do Senado, espera que a nova Constituição represente uma síntese do pensamento dos constituintes. Bernardo Cabral (PMDB-AM) deseja que na Carta esteja o fundamental. Foi entregue à Comissão de Sistematização a redação final do anteprojeto da Comissão da Ordem Econômica. José Lins (PFL-CE) disse que o anteprojeto deverá sofrer reparos. A Comissão de Sistematização irá organizar o que foi produzido nas fases anteriores. Nelson Jobim (PMDB-RS) diz que agora as mudanças serão de articulação e colocação. O Primeiro-Ministro da Espanha, Felipe Gonzales em visita ao Congresso e é recebido pelo Presidente da Constituinte Ulysses Guimarães (PMDB-SP), pelo Presidente do Senado Humberto Lucena (PMDB-PB) e pelos líderes de partidos.

Resolución No. 096: Por la cual se resuelve un recurso de reposición y en subsidio de apelación

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