Results 51 to 60 of about 5,381 (217)

Calibration and evaluation of the Canadian Forest Fire Weather Index (FWI) System for improved wildland fire danger rating in the United Kingdom [PDF]

Natural Hazards and Earth System Sciences, 2016
Wildfires in the United Kingdom (UK) pose a threat to people, infrastructure and the natural environment. During periods of particularly fire-prone weather, wildfires can occur simultaneously across large areas, placing considerable stress upon the ...
M. C. de Jong, M. J. Wooster, K. Kitchen, C. Manley, R. Gazzard, F. F. McCall   +5 more
doaj   +1 more source

A high-resolution reanalysis of global fire weather from 1979 to 2018 – overwintering the Drought Code [PDF]

Earth System Science Data, 2020
We present a global high-resolution calculation of the Canadian Fire Weather Index (FWI) System indices using surface meteorology from the ERA5 HRES reanalysis for 1979–2018.
M. McElhinny, M. McElhinny, J. F. Beckers, C. Hanes, M. Flannigan, P. Jain   +5 more
doaj   +1 more source

Deep Network Reparameterized Full‐Waveform Inversion From Sequential to Simultaneous Sources With Adjoint‐State Method

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 5, October 2026.
Abstract Full‐waveform inversion (FWI) relies on sequential‐source (SQ) workflows for high imaging precision, while simultaneous‐source (SML) encoding drastically accelerates computation but introduces irreversible wavenumber discontinuity artifacts in hybrid‐domain implementations.
Jinwei Fang, Jie Chen, Lutz Gross, Qingchen Zhang, Ning Wang   +4 more
wiley   +1 more source

Assessing Wildfire Hazard for Powerline Expansion Under the Changing Climates in Alberta, Canada

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract Escaped powerline‐caused fires (EPFs) are increasing in fire‐prone regions, including Alberta, Canada, underscoring growing tensions between expanding powerlines and managing wildfire risk. As fire‐conducive weather becomes more frequent, it remains unclear how future infrastructure can be planned to minimize wildfire risk.
Xuezheng Zong, Xianli Wang, Dante Castellanos‐Acuna, Tom Swystun, Mike D. Flannigan   +4 more
wiley   +1 more source

Full-waveform inversion based on generalized Rényi entropy using patched Green's function techniques.

PLoS ONE, 2022
The estimation of physical parameters from data analyses is a crucial process for the description and modeling of many complex systems. Based on Rényi α-Gaussian distribution and patched Green's function (PGF) techniques, we propose a robust framework ...
Wagner A Barbosa, Sérgio Luiz E F da Silva, Erick de la Barra, João M de Araújo   +3 more
doaj   +1 more source

Time‐Reversal Full Wavefield Inversion: From Waveform Misfit to Wavefield Focus

Geophysical Prospecting, Volume 74, Issue 7, September 2026.
ABSTRACT We introduce time‐reversal full wavefield inversion (TRFWI), a velocity‐model‐building method that replaces waveform‐misfit minimization with a physically motivated wavefield‐focusing criterion. The recorded data are reversed in time and backpropagated through a trial velocity model; the inversion objective is the degree to which the wavefield
Evgeny Landa, Sergey Fomel
wiley   +1 more source

An Eikonal‐Based Angle‐Domain Least‐Squares Kirchhoff Depth Migration in General Anisotropic Media

Geophysical Prospecting, Volume 74, Issue 7, September 2026.
ABSTRACT Least‐squares migration (LSM) is an inversion‐based imaging method that seeks a reflectivity model whose predicted data best fit the recorded seismic data in a least‐squares sense. However, conventional LSM can be unreliable for anisotropic reflection data if reflection angles are neglected.
Paulo H. B. Alves, Wei Zhang, Mauricio D. Sacchi, Marco Cetale   +3 more
wiley   +1 more source

FWI pode compensar a falta de iluminação na tomografia poço-a-poço? um estudo adicional [PDF]

, 2022
In the wave first arrival travel time tomography (FATTT), there is a limiting factor for its efficiency associated with the seismic illumination. For a homogeneous medium, the seismic illumination is defined, at each point in the crosswell region, as the
Amaral, Victória Fernandes do
core  

Climatic and Hydrological Changes Drive Contemporary Fire Regime Transitions in the World's Largest Wetland

Global Change Biology, Volume 32, Issue 9, September 2026.
Long‐term fire data (1985–2024) and integrated modeling reveal a climate and hydrology‐driven transition toward larger fires, increased burned area, and a longer fire season, indicating the emergence of a new fire regime in the Pantanal. ABSTRACT Tropical wetlands have historically been resilient to fire, but ongoing climate and hydrological changes ...
Lucas Barros‐Rosa, Pierre Girard, Priscila Lemes de Azevedo Silva, Fabio de Oliveira Roque, Mark Johnson, Christine Strüssmann, Thadeu Sobral de Souza, Renata Libonati, Liana O. Anderson, Cátia Nunes da Cunha, Geraldo Alves Damasceno‐Júnior, Walfrido Moraes Tomas, Lúcia Mateus, Fernando A. da Costa Fernandes, Daniela de Oliveira Maionchi, Junior Gonçalves da Silva, Higo J. Dalmagro, Jerry Penha   +17 more
wiley   +1 more source

Extended Fire Season Over Eastern Siberia Driven by Accumulated August–September Drought

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Siberian wildfires, a major disturbance to ecosystems and carbon cycles, have intensified in recent decades, yet long‐term changes in fire seasonality remain unclear. Here, using a refined fire‐season framework, we identify a pronounced shift in fire season characteristics over eastern Siberia during 2002–2023, marked by substantial ...
Yawen Liu, Lian Xue, Xin Huang, Yun Qian, Minghuai Wang   +4 more
wiley   +1 more source