Results 61 to 70 of about 50,862 (253)

Políticas da Meteorologia no Brasil

open access: yesRevista Brasileira de História da Ciência, 2016
artigo analisa o processo de construção das políticas científicas para a Meteorologia no Brasil através da história do Centro de Previsão do Tempo e Estudos do Clima (CPTEC) no Instituto Nacional de Pesquisas Espaciais (INPE).
Jean Carlos Hochsprung Miguel   +2 more
doaj   +1 more source

Física i societat a la Catalunya de finals del segle XIX [PDF]

open access: yes, 2014
¿Per què la demanda social respecte a la física es redueix en aquella època a l'astronomia i la ...
Antoni Roca i Rosell
core   +1 more source

Leptonic emission from microquasar jets: from radio to very high-energy gamma-rays [PDF]

open access: yes, 2006
Microquasars are sources of very high-energy gamma-rays and, very probably, high-energy gamma-ray emitters. We propose a model for a jet that can allow to give accurate observational predictions for jet emission at different energies and provide with ...
Bosch-Ramon, V.   +2 more
core   +2 more sources

Climate change and El Niño Southern Oscillation influence on mixing regime and water quality in a deep tropical mountain lake

open access: yesLimnology and Oceanography Letters, Volume 11, Issue 2, March 2026.
Abstract Climate change alters lake functioning, water quality, and aquatic biota; yet our understanding of this process is poor for deep tropical mountain lakes. A 15‐yr dataset (2010–2024) from Lake Atitlán, Guatemala, revealed climate change impacts on a tropical lake ecosystem and showed a warming trend of 0.34 ± 0.14°C per decade that intensified ...
Ovidio García‐Oliva   +8 more
wiley   +1 more source

AVALIAÇÃO DA SECA DE 2005 E 2010 NA AMAZÔNIA: ANÁLISE DA BACIA HIDROGRÁFICA DO RIO SOLIMÕES

open access: yesRevista Geográfica Acadêmica, 2015
A bacia hidrográfica do rio Solimões tem sua recarga hídrica modulada por diversos sistemas atmosféricos, onde a porção norte sofre maior influência da Zona de Convergência Intertropical (ZCIT) e a porção sul tem influência da Zona de Convergência do ...
Edivaldo Afonso de Oliveira Serrão   +3 more
doaj   +3 more sources

Verification of Calibrated Multimodel Subseasonal Precipitation Predictions Cascaded From Global to Regional Scale Over Ceará State in Brazil

open access: yesMeteorological Applications, Volume 33, Issue 2, March/April 2026.
This study assesses prediction quality of regionally refined (downscaled) calibrated multimodel predictions for Ceará State in Brazil. Downscaled predictions maintained similar performance levels to those obtained at the coarser spatial resolution of the used global models, reassuring the adequacy of the cascading procedure used to generate predictions
Caio A. S. Coelho   +4 more
wiley   +1 more source

EVALUATION OF ASTER IMAGES FOR CHARACTERIZATION AND MAPPING OF AMETHYST MINING RESIDUES [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
The objective of this work was to evaluate the potential of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), subsystems VNIR (Visible and Near Infrared) and SWIR (Short Wave Infrared) images, for discrimination and mapping of ...
P. R. Markoski, S. B. A. Rolim
doaj   +1 more source

Assessing contributions of deterministic versus stochastic processes to local species assembly: A field experiment with annual plant‐dominated communities in gypsum systems

open access: yesJournal of Ecology, Volume 114, Issue 3, March 2026.
In this study, we experimentally show that stochasticity can play prominent roles in driving local species assembly in annual plant‐dominated communities of semiarid gypsum ecosystems. Drylands are traditionally viewed as restrictive environments that impose strong deterministic filtering effects, but neutral events can also contribute decisively to ...
Laura Ortiz   +3 more
wiley   +1 more source

INVESTIGAÇÃO SOBRE MÉTODOS PARA REDUÇÃO DA DIMENSIONALIDADE DOS DADOS EM IMAGENS HIPERESPECTRAIS

open access: yesRevista Brasileira de Cartografia, 2009
Neste estudo é proposta uma nova metodologia para fins de redução da dimensionalidade dos dados em imagens hiperespectrais. Nesta abordagem, parte-se da suposição de que a curva de resposta espectral em cada pixel, pode ser adequadamente descrita por um ...
Maciel Zortea   +2 more
doaj  

Os primeiros tempos do Tempo nos Açores [PDF]

open access: yes, 2013
A secção UAciência é coordenada pelo Professor Universitário Armindo Rodrigues.A história da meteorologia e um campo de estudos relativamente recente dentro da história das ciências, tanto nos vários países europeus como nos Estados Unidos.
Meirelles, Maria Gabriela
core  

Home - About - Disclaimer - Privacy