Results 31 to 40 of about 9,718,972 (114)
SIRGAS-CON una red geodésica utilizada en el monitoreo del vapor de agua troposférico sobre Latinoamérica [PDF]
, 2016 El sistema Tierra se encuentra en permanente estudio. Diversas ciencias analizan variables específicas que requieren su georreferenciación. La variación del nivel del mar, la tectónica, el monitoreo atmosférico, son ejemplos evidentes de esta necesidad.
Camisay, Fernanda +5 more
core +1 more source
Morphological Changes and Alterations in Erosion–Accretion Patterns in a Semiarid Brazilian River
Earth Surface Processes and Landforms, Volume 51, Issue 9, September 2026.Flow regulation by the Castanhão Dam significantly altered discharge dynamics and reduced sediment transport in the Jaguaribe River. Long‐term analysis (1958–2025) reveals attenuated flood peaks, decreased channel migration and progressive downstream stabilisation, highlighting persistent geomorphic adjustments in a regulated semiarid fluvial system ...
Andrea Almeida Cavalcante +2 more
wiley +1 more source
Water Environment Research, Volume 98, Issue 9, September 2026.Metagenomics revealed distinct anthropogenic signatures in the microbiome of freshwater sources on Marambaia Island, supported by the Anthropogenic Impact Index (AII). Impacted sites showed lower microbial diversity, enrichment of fecal‐associated taxa, and 14 antimicrobial resistance genes, whereas conductivity, salinity, and turbidity explained 88.1%
Bruna Barbosa de Paula +6 more
wiley +1 more source
Anatomia, Histologia, Embryologia, Volume 55, Issue 5, September 2026.ABSTRACT The ichthyofauna of the lower Doce River basin has been exposed to multiple anthropogenic stressors. Among these, the collapse of the Fundão mining tailings dam in Mariana, Minas Gerais, Brazil, in 2015 resulted in massive fish mortality and widespread contamination of aquatic environments.
Lucas Marcon +8 more
wiley +1 more source
GNSS network integration: a methodological proposal of the densification of the SIRGAS network in South America [PDF]
, 2011 A característica continental do Brasil implica na necessidade de constantes desafios científicos em pesquisas espaciais e tecnológicas, que visam contribuir ao engajamento de centros de pesquisas, fornecendo instrumentos às atividades espaciais no país e
Chaves, João Carlos [UNESP] +11 more
core +1 more source
SIRGAS: the core geodetic infrastructure in Latin America and the Caribbean [PDF]
, 2017 COMUNICACIÓN CIENTÍFICA PRESENTADA EN ASAMBLEA CIENTÍFICA CONJUNTA DE LA ASOCIACIÓN INTERNACIONAL DE GEODESIA Y LA ASOCIACIÓN INTERNACIONAL DE SISMOLOGÍA Y FÍSICA DEL INTERIOR DE LA TIERRA (IAG-IASPEI 2017), 30 de julio - 4 de agosto de 2017, Kobe, Japón.
Marínez, William +13 more
core +1 more source
Uniciencia, 2014 Mediante un cálculo en la modalidad Precise Point Positioning (PPP) en línea, se procesaron más de dos años de observaciones diarias de 14 estaciones de operación continua pertenecientes al Sistema Geocéntrico para las Américas (SIRGAS), las cuales están
Jorge Moya Zamora +3 more
doaj
Weed Research, Volume 66, Issue 5, September/October 2026.ABSTRACT The genus Amaranthus comprises approximately 70 species with a global distribution, particularly in tropical and subtropical regions. In Brazil, Amaranthus hybridus is a highly harmful weed characterised by aggressive ecophysiology, producing more than 250 000 viable seeds per plant and forming extensive soil seed banks.
Werik P. Dias +5 more
wiley +1 more source
Productos troposféricos de SIRGAS. ¿Qué son? ¿Para qué sirven? Estado al 2020 y perspectivas futuras [PDF]
, 2020 El vapor de agua en la Troposfera es uno de los componentes menos comprendidos y escasamente descriptos de la Atmósfera terrestre. La medición del mismo se realiza tradicionalmente mediante radiosondas (técnica costosa, dado que se pierde en cada ...
Rosell, Patricia Alejandra +5 more
core
A quantitative analysis to detect mass mortality events (wrecks) in Procellariiformes
Journal of Applied Ecology, Volume 63, Issue 7, July 2026.Our study provides the first systematic assessment of seabird mass mortality events in the South Atlantic and introduces a transferable statistical framework for detecting MMEs in other taxa and regions lacking baseline mortality information. By identifying recurrent temporal anomalies, high‐risk areas and vulnerable species, we could establish ...
Laura Baes +3 more
wiley +1 more source