Results 71 to 80 of about 17,552 (267)

Dynamics and model representation of two contrasting extreme precipitation events in the Sahel

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Hovmöller diagrams of the two investigated extreme precipitation events in Mali are shown for (i) IMERG observations, and ICOsahedral Nonhydrostatic model (ICON) runs with parameterization of explicit convection (ii) enabled and (iii) disabled. This work highlights that the commonly perceived benefit of using explicit convection in a state‐of‐the‐art ...
Souleymane Sanogo, Marlon Maranan, Andreas H. Fink, Beth J. Woodhams, Peter Knippertz   +4 more
wiley   +1 more source

Real-time extraction of the Madden-Julian oscillation using empirical mode decomposition and statistical forecasting with a VARMA model [PDF]

, 2008
A simple guide to the new technique of empirical mode decomposition (EMD) in a meteorological-climate forecasting context is presented. A single application of EMD to a time series essentially acts as a local high-pass filter.
Adrian J. Matthews, Ansley, Barnaby S. Love, Box, Coughlin, Duffy, Ferranti, Gareth J. Janacek, Gill, Goswami, Hall, Hendon, Hendon, Huang, Huang, Jones, Jones, Li, Liebmann, Lo, Madden, Maharaj, Maloney, Matthews, Mo, Salby, Shea, Waliser, Waliser, Waliser, Waliser, Wheeler, Wheeler, Wheeler, Woolnough, Wu, Zhang   +36 more
core   +1 more source

Windows of opportunity in subseasonal weather regime forecasting: A statistical–dynamical approach

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study explores how the atmospheric state at initialisation creates windows of opportunity for improving week 3 forecasts of weather regime activity. Greenland blocking activity increases following Madden–Julian Oscillation phases 7, 8, and 1 and weak stratospheric polar vortex states, revealing patterns exploitable by statistical models.
Fabian Mockert, Christian M. Grams, Sebastian Lerch, Julian Quinting   +3 more
wiley   +1 more source

The intraseasonal fluctuation of Indian summer monsoon rainfall and its relation with monsoon intraseasonal oscillation (MISO) and Madden Julian oscillation (MJO)

Theoretical and Applied Climatology, 2021
The intraseasonal fluctuations of Indian summer monsoon rainfall (ISMR) are mainly controlled by northward propagating monsoon intraseasonal oscillation (MISO) and eastward propagating Madden Julian oscillation (MJO). In the current study, we examine the
A. Dey, R. Chattopadhyay, S. Joseph, M. Kaur, R. Mandal, R. Phani, A. Sahai, D. Pattanaik   +7 more
semanticscholar   +1 more source

A Madden‐Julian Oscillation in tropospheric ozone [PDF]

Geophysical Research Letters, 2003
This study shows evidence of a Madden‐Julian Oscillation (MJO) in tropospheric ozone. Tropospheric ozone is derived using differential measurements of total column ozone and stratospheric column ozone from total ozone mapping spectrometer (TOMS) and microwave limb sounder (MLS) instruments.
J. R. Ziemke, S. Chandra
openaire   +1 more source

Synoptic events associated with the land surface temperature in Rio de Janeiro

Bioscience Journal, 2017
This article aimed to evaluate land surface temperature using MOD11A2 (Terra satellite) with spatial resolution of one kilometre, compares its findings with land surface temperature data gathered by conventional meteorological stations, and, finally ...
Rafael Coll Delgado, José Francisco de Oliveira-Júnior, Givanildo Gois, Rafael de Ávila Rodrigues, Paulo Eduardo Teodoro   +4 more
doaj   +3 more sources

Assessing the impact of model biases on subseasonal forecast skill

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Relaxation experiments where the nudging was performed towards bias‐corrected integrations of the same model display significantly improved skill at weeks 3 and 4, particularly in the northern extratropics. This indicates that there is a large potential for improving dynamical subseasonal forecasting skill by improved treatment of model biases.
Frédéric Vitart, Magdalena Balmaseda
wiley   +1 more source

The effect of the quasi-biennial oscillation on the Madden-Julian oscillation in the Met Office Unified Model Global Ocean Mixed Layer configuration [PDF]

, 2018
Using multi-decadal simulations, we investigate the relationship between the Quasi-Biennial Oscillation (QBO) and the Madden–Julian Oscillation (MJO) in the Global Ocean Mixed Layer Configuration of the Met Office Unified Model (MetUM-GOML1) at two ...
Baldwin, Benedict, Bush, Butler, Charlton-Perez, Christiansen, Collimore, Dee, Fueglistaler, Garfinkel, Giorgetta, Hardiman, Hirons, Huang, Hudson, Hurrell, Jiang, Kang, Klingaman, Klingaman, Klingaman, Lawrence, Liu, Madden, Marshall, Nie, Nishimoto, Osprey, Rayner, Shelly, Smith, Son, Walters, Wheeler, Wu, Yoden, Yoo, Yuan, Zhang   +38 more
core   +1 more source

Exceptionally poor and good medium‐range forecasts of the large‐scale circulation over Europe in ERA5 reforecasts

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study investigates year‐round exceptionally poor and good day‐6 forecasts of the 500‐hPa geopotential height field over Europe using 45 years of ERA5 reforecasts and applies a weather regime perspective to analyse large‐scale pattern evolution and regime transitions.
Seraphine Hauser, Steven M. Cavallo, Linus Magnusson, Jonathan E. Martin, David B. Parsons   +4 more
wiley   +1 more source

Fast and slow Kelvin waves in the Madden-Julian Oscillation of a GCM [PDF]

, 1999
The structure of the Madden-Julian Oscillation (MJO) in an 1800-day integration of the Hadley Centre Unified Model was analysed, and interpreted within a Kelvin wave framework. The model was forced with constant equinoctial (March) boundary conditions so
Andrews, Barnston, Cullen, Duchon, Emanuel, Emanuel, Ferranti, Flatau, Gregory, Heckley, Hendon, Hsu, Inness, Kalnay, Kiladis, Knutson, Lau, Lau, Liebmann, Livezey, Lorenc, Madden, Matthews, Millif, Neelin, Neelin, Rui, Salby, Salby, Slingo, Slingo, Slingo, Sperber, Wang, Webster, Weickmann, Zhang   +36 more
core   +1 more source