204,117 research outputs found
Measurements of pCO2 and turbulence from an autonomous drifting buoy in 2019 during FALKOR cruise FK191120
No full textData from autonomous, drifting buoy with a floating chamber to measure insitu air-sea carbon dioxide (CO2) fluxes during RV Falkor cruise FK191120 in the southern Pacific during November-December 2019. The technique is described in detail in Ribas-Ribas et al. (2018) (https://doi.org/10.1525/elementa.275). The buoy is equipped with a sensor to measure aqueous and atmospheric partial pressure of CO2 (pCO2), and to monitor the increase or loss of CO2 inside the chamber. One complete cycle including two chamber measurements last 70 minutes. The buoy can be deployed for more than 15 hours, and at wind speeds of up to 10 m/s. Floating chambers are known to overestimate fluxes due to the creation of additional turbulence at the water surface. We check that by measuring turbulence with two Acoustic Doppler Velocimeter (ADV), one directly underneath the center of the floating chamber (equipped with an inertial motion unit) and the other one positioned sideways to measure turbulence outside the perimeter of the buoy
Measurements of turbulence from an autonomous drifting buoy in 2019 during FALKOR cruise FK191120
No full textData from autonomous, drifting buoy with a floating chamber to measure insitu air-sea carbon dioxide (CO2) fluxes during RV Falkor cruise FK191120 in the southern Pacific during November-December 2019. The technique is described in detail in Ribas-Ribas et al. (2018) (https://doi.org/10.1525/elementa.275). The buoy is equipped with a sensor to measure aqueous and atmospheric partial pressure of CO2 (pCO2), and to monitor the increase or loss of CO2 inside the chamber. One complete cycle including two chamber measurements last 70 minutes. The buoy can be deployed for more than 15 hours, and at wind speeds of up to 10 m/s. Floating chambers are known to overestimate fluxes due to the creation of additional turbulence at the water surface. We check that by measuring turbulence with two Acoustic Doppler Velocimeter (ADV), one directly underneath the center of the floating chamber (equipped with an inertial motion unit) and the other one positioned sideways to measure turbulence outside the perimeter of the buoy
Measurements of pCO2 from an autonomous drifting buoy in 2019 during FALKOR cruise FK191120, station 2
No full textData from autonomous, drifting buoy with a floating chamber to measure insitu air-sea carbon dioxide (CO2) fluxes during RV Falkor cruise FK191120 in the southern Pacific during November-December 2019. The technique is described in detail in Ribas-Ribas et al. (2018) (https://doi.org/10.1525/elementa.275). The buoy is equipped with a sensor to measure aqueous and atmospheric partial pressure of CO2 (pCO2), and to monitor the increase or loss of CO2 inside the chamber. One complete cycle including two chamber measurements last 70 minutes. The buoy can be deployed for more than 15 hours, and at wind speeds of up to 10 m/s. Floating chambers are known to overestimate fluxes due to the creation of additional turbulence at the water surface. We check that by measuring turbulence with two Acoustic Doppler Velocimeter (ADV), one directly underneath the center of the floating chamber (equipped with an inertial motion unit) and the other one positioned sideways to measure turbulence outside the perimeter of the buoy
Multiparameter measurement of biogeochemical properties of the sea surface microlayer in the Pacific Ocean during R/V Falkor cruise FK191120
No full textMultiparameter measurement of biogeochemical properties of the sea surface microlayer (SML), 0.5-meter depth, underlying water (ULW) at 1-meter depth and near surface ocean at 1.5-meter depth during cruise FK1911120 onboard RV Falkor. The pH, temperature and conductivity were measured both in the SML and ULW with two VWR model MU 6100H. The salinity values were calculated from the conductivity and corrected with discrete water samples measured with a salinometer in the lab. The temperature reported comes from the conductivity sensors. The pH (0m) and pH (1m) were measured in surface and bulk water (approximated 0.5 and 1.5 m depth) with a flowthrough sensor manufactured by SubCtech and with two AMT pH sensors. Fluorescent dissolved organic matter (fDOM) in SML and ULW was measured with two TriOs MicroFlu sensors. All the meteorological data comes from a Davis Instrument Vantage Pro2 located on the top of the sea surface scanner (S3) mast. Discrete samples for surfactants analysis were taken with the S3 and analysed in the laboratory with voltammetry. More details about the S3 and the sensors on it are described in Ribas-Ribas et al., 2017 (https://doi.org/10.1175/JTECH-D-17-0017.1). The S3 was deployed during 17 stations between the 20 November 2019 and the 17 December 2019 in the Pacific Ocean
Maria Cristina C. Ribas and Anélia M. Pietrani interview Gilberto Mendonça Teles and Helena Bonito Couto Pereira
No full textMaria Cristina Cardoso Ribas e Anélia Montechiari Pietrani entrevistam Gilberto Mendonça Teles, poeta, crítico, professor e acadêmico correspondente da Academia das Ciências de Lisboa, e Helena Bonito Couto Pereira, professora visitante na UFPA, especialista em teoria e critica literárias e fundadora da Revue Internationale d´Art et d´ArtologieMaria Cristina Cardoso Ribas and Anélia Montechiari Pietrani interview Gilberto Mendonça Teles, a Brazilian poet, critic, professor and a fellow from the Lisbon Academy of Sciences, and the visiting professor at Federal University of Pará – Brazil –, Helena Bonito Couto Pereira, a specialist in literary theory and criticismo, and founder of the Revue Internationale d’Art et d’Artologie
MARIA ROSA RIBAS MONNÉ: A CASE STUDY
No full textThis dissertation explores the musical legacy of Catalan composer Maria Rosa Ribas Monné, emphasizing the influence of the Catalan context on her compositions and recognizing the contributions of Spanish women in music, particularly in cello music. Through an in-depth exploration of Maria Rosa\u27s life, musical perspective, and analysis of her works Faust , Disperato, and Record d\u27una música, this study unveils pivotal insights into her artistic journey. Additionally, it includes a comprehensive catalogue of her compositions, providing a detailed overview of her musical output.
The dissertation begins by examining how M. Rosa Ribas\u27 deep connection to Catalan culture, influenced by poet Màrius Torres, shapes her musical identity. It delves into her musical influences, including Xavier Montsalvatge, Carles Guinovart, and Arnold Schoenberg, and analyzes the interplay between her artistic vision and the compositions discussed.
Ultimately, M. Rosa Ribas \u27s compositions emerge as powerful expressions of the Catalan literary tradition. This dissertation offers valuable insights into the dynamic interaction between music, culture, and identity, reaffirming the enduring significance of Maria Rosa Ribas Monné\u27s contributions to the musical landscape
Air–sea CO2 fluxes in the north-eastern shelf of the Gulf of Cádiz (southwest Iberian Peninsula)
No full textAn intra-annual investigation of the fugacity of CO2 (fCO2) has been conducted in surface waters of the north-eastern shelf of the Gulf of Cádiz (SW Iberian Peninsula) in four cruises made in 2006 and 2007. Intra-annual variability of fCO2 was assessed and is discussed in terms of mixing, temperature and biology. In the study area of the shelf, thermodynamic control over fCO2 predominates from early May to late November, and this is opposite and similar in magnitude to the net biological effect. However, biological control over fCO2 predominates during winter. The results suggest that surface waters in the coastal area are under-saturated with respect to atmospheric CO2 during most of the year; therefore they represent a sink for atmospheric CO2 between November and May (? 1.0 mmol m? 2 day? 1), but a weak source in June (1.3 mmol m? 2 day? 1). In contrast, the coastal ecosystems studied (the lower estuary of Guadalquivir Estuary and Bay of Cádiz) acted as a weak sink for atmospheric CO2 during February (? 1.3 mmol m? 2 day? 1) and as a source between May and November (2.6 mmol m? 2 day? 1). The resulting mean annual CO2 flux in the north-eastern shelf of the Gulf of Cádiz was ? 0.07 mol m? 2 year? 1 (? 0.2 mmol m? 2 day? 1), indicating that the area acts as a net sink on an annual basis
Spatio-temporal variability of the dissolved organic carbon and nitrogen in a coastal area affected by river input: The north eastern shelf of the Gulf of Cádiz (SW Iberian Peninsula)
No full textFour surveys (June and November 2006; February and May 2007) were carried out in the north eastern shelf of the Gulf of Cádiz (southwest Iberian Peninsula) to investigate the dynamics of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) in a coastal area affected mainly by river input, but also by primary production/respiration, resuspension from the sediments, and mixing. In the period of the present study, DOC values ranged from 42 to 198 ?M, while DON ranged from 0 to 20 ?M. The seasonal variations showed high mean surface concentrations of DOC (106.2 ± 25.6 ?M-C) and DON (8.6 ± 3.1 ?M-N) in May, shifting to low DOC (89.1 ± 26.4 ?M-C) and DON (4.2 ± 2.8 ?M-N) in February. In spring, DOC and DON released by phytoplankton are likely to be the most significant source of organic matter. Low DOC and DON concentrations during winter are probably due to the uptake of DOC and DON by bacteria and to the strong mixing of the water column. The spatial variations showed the highest mean concentrations of dissolved organic matter (DOM) in the lower part of the Guadalquivir Estuary and the lowest mean concentrations of DOM in the bottom water of the oceanic zone. The very high mean DOC and DON concentrations measured off the Guadalquivir Estuary may be due to river input and/or re-suspension of the organic matter from the bottom sediments. The very low mean DOC and DON concentrations measured in the bottom water of the continental shelf may be due to mineralization and a surplus of more refractory organic carbon
Modelo organizacional de autogestão para projetos sociais: uma ação de design
Get PDFDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção
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