Results 81 to 90 of about 67,641 (268)

Quantifying driving ensemble influence on operational convection‐permitting ensemble spread

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
By comparing statistics of precipitation patterns between a convection‐permitting ensemble and the global ensemble used to drive it, we investigate the conditions under which the convection‐permitting ensemble diverges from the evolution of the driving ensemble.
Adam Gainford   +4 more
wiley   +1 more source

Extensive floods in south-western Poland : synoptic drivers, upper air environment and associated impacts

open access: yesGeographia Polonica
The main research aim was to determine changes in synoptic conditions during rainfall incidents that led to catastrophic flood events in south-western Poland in 1997, 2010 and 2024.
Sławomir Sulik   +3 more
doaj   +1 more source

Climatic and drought characteristics in the loess hilly-gully region of China from 1957 to 2014.

open access: yesPLoS ONE, 2017
The loess hilly-gully region is a focus region of the "Grain for Green" program in China. Drought is the main problem in the study region. Precipitation and temperature are two indicators that directly characterize climatic drought.
Xingkai Zhao   +4 more
doaj   +1 more source

A new smoother method for treating different timescales in variational data assimilation for coupled systems

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
We propose a new method for treating different timescales in coupled variational data assimilation for atmosphere–ocean models. The approach involves a series of short‐window coupled assimilations (red arrows in the schematic) followed by a long‐window correction to the ocean fields (blue arrow).
Amos S. Lawless   +3 more
wiley   +1 more source

An Enduring Philosophical Agenda. Worldview Construction as a Philosophical Method [PDF]

open access: yes, 2007
Is there something like a philosophical method? It seems that there are as many methods as there are philosophies. A method is any procedure employed to attain a certain end. So, before going to a method, we have to ask: what is the aim of philosophy? At
Vidal, Clément
core   +1 more source

Polar‐low track prediction using machine‐learning methods

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
Machine‐learning models are developed to produce reliable and efficient forecasts of polar‐low (PL) trajectories 12 hours ahead. A temporal model (RLSTM) benefiting from the rolling‐forecast strategy, improves overall prediction accuracy and is suitable for quick experimentation, while a spatiotemporal model (PL‐UNet), incorporating both historical and
Ziying Yang   +4 more
wiley   +1 more source

Possibilities and problems of solar magnetic field observations for space weather forecast

open access: yesSolar-Terrestrial Physics, 2017
An essential part of the space weather problem, important in the last decades, is the forecast of near-Earth space parameters, ionospheric and geomagnetic conditions on the basis of observations of various phenomena on the Sun.
Demidov M.L.
doaj   +1 more source

A new method to identify and explain sources of precipitation modification, illustrated for the western Netherlands

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
This study develops a method to identify the source areas of precipitation events, as illustrated for the western part of the Netherlands. Radar‐based precipitation data are traced back to their source areas and machine‐learning techniques are used to identify hypothesized causes: urban heat, surface roughness, and air pollution. We find that urban and
Jelmer van der Graaff   +1 more
wiley   +1 more source

Stratospheric and tropospheric seasonality and its implications for observation requirements in numerical weather prediction

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
Daily time series of zonal‐mean zonal wind (m·s−1) at 10 hPa and 60° N from 1950 to 2021 from the ERA5 reanalysis. This shows huge variability in some seasons and very little in others. We provide evidence that high‐level observations, radiosonde and satellite, are more important during the extended winter season with its very large variability ...
Bruce Ingleby, Inna Polichtchouk
wiley   +1 more source

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