Results 21 to 30 of about 1,337 (187)

Observando o céu, quantificando as nuvens e praticando modelagem: um exercício de apoio ao aprendizado das ciências atmosféricas

Revista Brasileira de Ensino de Física
As concepções pedagógicas modernas concordam com o fato de que atividades que levem o aluno a experimentar processos são fundamentais para uma perfeita e integral compreensão destes processos.
Arcilan Trevenzoli Assireu, Michelle Simões Reboita, Marcelo de Paula Corrêa   +2 more
doaj   +1 more source

The Role of Moisture Transport Deficits in Modulating Drought and Fire Patterns in the Upper Paraguay River Basin, Brazil

Meteorological Applications, Volume 33, Issue 3, May/June 2026.
The Upper Paraguay River Basin faced intense droughts in 1999, 2007, and 2010, coinciding with extensive wildfires. In 2007, a severe drought episode affected 97.5% of its area. These extreme years were characterized by pronounced negative anomalies and shifts in atmospheric moisture contributions from key source regions, during dry season. ABSTRACT In
Liz Barreto Coelho Belém, Raquel Nieto, Leonardo F. Peres, Nilson Oliveira da Silva, Milica Stojanovic, Marta Vázquez, Ronaldo Albuquerque, Allan Arantes Pereira, Carlos C. DaCamara, Luis Gimeno, Ana M. B. Nunes, Letícia Couto Garcia, Geraldo Alves Damasceno Junior, Fabio de Oliveira Roque, Renata Libonati   +14 more
wiley   +1 more source

The Influence of Fluvial Incision on the Lithospheric Stress Field: A Numerical Approach

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract Erosion along large fluvial valleys transports important sedimentary volumes across continents over geological time, modifying the loads imposed on the lithosphere and inducing isostasy‐related subsurface stresses. This work presents numerical experiments with a visco‐plastic lithosphere aimed at understanding the distribution and evolution of
F. Baiadori, V. Sacek
wiley   +1 more source

Impact of Mantle Velocity Uncertainty on Receiver‐Function Imaging of the Transition Zone

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Seismological estimates of the 400‐km and 670‐km mantle discontinuities (d400 and d670) are crucial for understanding the thermochemical structure and dynamics of the mantle transition zone (MTZ). However, artifacts from using ray theory and uncertainties in mantle velocity structure can affect topographic mapping of these boundaries.
Carlos A. M. Chaves, Felipe P. Corral, Jeroen Ritsema   +2 more
wiley   +1 more source

Comparative ozone production sensitivity to NO_x and VOCs in Quito, Ecuador, and Santiago, Chile [PDF]

Atmospheric Chemistry and Physics
Amid the current climate and environmental crises, cities are being called to reduce levels of atmospheric pollutants that also act as short-lived climate forcers, such as ozone and PM2.5. This endeavor presents new challenges, especially in understudied
M. Cazorla, M. Trujillo, R. Seguel, R. Seguel, L. Gallardo, L. Gallardo   +5 more
doaj   +1 more source

High Geomagnetic Reversal Frequency During the Middle to Late Ediacaran (∼570 Ma) Constrained by Integrated Magneto‐ and Cyclostratigraphy

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract The Ediacaran–Cambrian (∼635–539 Ma) geomagnetic field is characterized by unusually high reversal rates and markedly weakened field strength. Estimates of these reversal frequencies can reveal key aspects of deep Earth dynamics and their potential influence on surface environments and early complex life.
J. W. L. Afonso, R. M. Rocha, D. R. Franco, N. B. Dos Santos, C. G. Leandro, P. Franceschinis, A. E. Rapalini, M. J. Arrouy, L. E. Gómez‐Peral, D. G. Poiré, S. Caetano‐Filho, H. D. Brito, R. I. F. Trindade   +12 more
wiley   +1 more source

Impacts of Low‐Level Jets on Moisture Transport to the Pantanal, Brazil

International Journal of Climatology, Volume 46, Issue 3, 15 March 2026.
The moisture transports from the tropics to the subtropics by the low‐level jets (LLJs) east of the Andes crossing the Pantanal region. Four LLJs, east of the Andes, were identified and selected with correspondent Lagrangian moisture transport. The LLJ moisture source regions contribute to Pantanal (~63.5%) and precipitation increased (~30%) during LLJ
Nilson Oliveira da Silva, Ana Maria Pereira Nunes, Raquel Nieto, Milica Stojanovic, Rosmeri Porfírio da Rocha   +4 more
wiley   +1 more source

Estado de la investigación de los aspectos físicos del cambio climático de México

Investigaciones Geográficas, 2012
Se hace una descripción del estado que guarda la investigación sobre cambio climático (cc) en México y su evolución desde la década de los ochenta. Se mostrará que se han integrado grupos de trabajo y proyectos ambiciosos que permiten tener ya una visión
Adalberto Tejeda Martínez, Luis Rodríguez Viqueira   +1 more
doaj   +1 more source

Suprathermal Soliton Solutions to Nonlinear Schrödinger Equation

Contributions to Plasma Physics, Volume 66, Issue 3, March 2026.
ABSTRACT Maxwell distributions are very difficult to find in the low‐pressure environment far away the Earth atmosphere, permeated by high temperatures, various types of radiation, highly energetic particles, space debris, and subjected to microgravity, presenting crucial challenges for spacecraft design and operations, and affecting astronaut's health.
F. E. M. Silveira, M. H. Benetti, I. L. Caldas   +2 more
wiley   +1 more source

Paulo Marques dos Santos (1927 – 2022) Meteorologista e Astrônomo. Crucial na institucionalização do IAG/USP

Khronos, 2023
Paulo Marques dos Santos ingressou no IAG/USP em 1948 como Auxiliar Técnico em Meteorologia, tornando-se Encarregado da Estação Meteorológica do IAG/USP em 1955, cargo que manteve até sua aposentadoria compulsória em 1997.
Oscar Toshiaki Matsuura
doaj