Results 91 to 100 of about 2,209,995 (233)
Quarterly Journal of the Royal Meteorological Society, EarlyView.Satellite radiance observations are spatially thinned using a grid‐based selection that retains one representative profile per cell. When observation errors are spatially correlated but treated as uncorrelated in the assimilation system, reducing thinning increases their influence, leading to overfitting and reduced analysis fit with other observations.
Joel Bedard +3 more
wiley +1 more source
Data‐driven emulation of flow‐dependent background‐error variance in variational data assimilation
Quarterly Journal of the Royal Meteorological Society, EarlyView.A machine‐learning approach is developed to emulate flow‐dependent background‐error variance within a variational data assimilation framework. The method reproduces uncertainty information that would normally require a 50‐member ensemble using only five members, while maintaining comparable observation fit and forecast performance.
Wei Pan +3 more
wiley +1 more source
Simulations of the Extratropical Transition of Tropical Cyclones: Phasing between the Upper-Level Trough and Tropical Cyclones [PDF]
, 2007 The article of record as published may be found at http://dx.doi.org/10.1175/MWR3303.1Whether the tropical cyclone remnants will become a significant extratropical cyclone during the reintensification stage of extratropical transition is a complex ...
Ritchie, Elizabeth A. +1 more
core +2 more sources
Extratropical transitions in the North Atlantic with special reference to Hurricane Igor [PDF]
, 2013 There is a tendency to equate the word "hurricane" with the tropical regions of the world. Few recognize the danger and risks that occur when a tropical cyclone reaches colder subtropical waters and undergoes extratropical transition.
Masson, Athena
core +1 more source
Quantifying transport into the lowermost stratosphere using simultaneous in-situ measurements of SF₆ and CO₂ [PDF]
, 2008 The seasonality of transport and mixing of air into the lowermost stratosphere (LMS) is studied using distributions of mean age of air and a mass balance approach, based on in-situ observations of SF6 and CO2 during the SPURT (Spurenstofftransport in der
Bönisch, Harald +4 more
core +1 more source
Characteristics of quasi‐stationary band‐shaped precipitation systems in Japan between 1989 and 2022
Quarterly Journal of the Royal Meteorological Society, EarlyView.(a) Annual occurrence frequency of QBPSs (green bars), five‐years moving average (blue line), and regression trend (red line) for 1989–2022. (b) Distribution of the geographical occurrence frequencies of QBPSs with a 5‐km resolution for 1989–2022. Quasi‐stationary band‐shaped precipitation systems (QBPSs) are a major cause of localized heavy rainfall ...
Yasutaka Hirockawa +2 more
wiley +1 more source
Tellus: Series A, Dynamic Meteorology and Oceanography, 2013 Current El Niño-Southern oscillation (ENSO) theory emphasizes that the forcing that drives the cycle mainly exists within tropical regions. However, these ideas are quite limited in explaining completely the occurrence of ENSO.
Yafei Wang +2 more
doaj +1 more source
Vortex Spinup Process in the Extratropical Transition of Hurricane Sandy (2012) [PDF]
Journal of the Atmospheric Sciences, 2019 Abstract This study utilizes the quasi-Lagrangian azimuthal momentum equation (i.e., budget calculation) and 1.667-km-resolution numerical simulation data to study the intensity and structural changes in Hurricane Sandy’s extratropical transition.
openaire +1 more source
Diagnosing and Forecasting Extratropical Transition: A Case Exercise on Hurricane Michael
, 2002 The NorLatMet team releases Diagnosing and Forecasting Extratropical Transition: A Case Exercise on Hurrican Michae as it moved into the Maritime region of the Canadian east coast in October, 2000.
Tim Spangler
core
Weather, EarlyView.This study documents the unseasonal and prolonged heavy rain events which occurred in southern China during April 2024. In this series of extreme rainfall events, Guangdong province recorded extreme rainfall exceeding 6‐sigma of climatology, with eleven cities reporting record‐breaking rainfall.
Wai‐Po Tse +2 more
wiley +1 more source