Search Results - "Hall, Nicholas M. J."

A distinct and reproducible teleconnection pattern over North America during extreme El Niño events by Beniche, Margot, Vialard, Jérôme, Lengaigne, Matthieu, Voldoire, Aurore, Srinivas, Gangiredla, Hall, Nicholas M. J.

“…El Niño-Southern Oscillation (ENSO) teleconnections are an important predictability source for extratropical seasonal climate forecasts. Previous studies…”
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Impact of the observed extratropics on climatological simulations of the MJO in a tropical channel model by Hall, Nicholas M. J., Thibaut, Séverin, Marchesiello, Patrick

“…A regional model is used to quantify the influence of the extratropics on simulated tropical intraseasonal variability. The Weather Research and Forecasting…”
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Dynamics of the West African Monsoon. Part IV: Analysis of 25–90-Day Variability of Convection and the Role of the Indian Monsoon by Janicot, Serge, Mounier, Flore, Hall, Nicholas M. J., Leroux, Stéphanie, Sultan, Benjamin, Kiladis, George N.

“…This paper is part of a series of studies addressing the dynamics of the West African summer monsoon at intraseasonal time scales between 10 and 90 days. The…”
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The extratropical response to a developing MJO: forecast and climate simulations with the DREAM model by Hall, Nicholas M. J., Le, Hong Hanh, Leroux, Stephanie

“…The Madden Julian oscillation (MJO) has a systematic influence on the state of the extratropical atmosphere. The physical mechanism involves teleconnections…”
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Giant ice rings in southern Baikal: multi-satellite data help to study ice cover dynamics and eddies under ice by Kouraev, Alexei V, Zakharova, Elena A, Kostianoy, Andrey G, Shimaraev, Mikhail N, Desinov, Lev V, Petrov, Evgeny A, Hall, Nicholas M. J, Rémy, Frédérique, Suknev, Andrey Ya

“…Ice cover on lakes is subject to atmospheric forcing from above and the influence of water dynamics and heat flux from below. One characteristic example of…”
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Intermittent African Easterly Wave Activity in a Dry Atmospheric Model: Influence of the Extratropics by Leroux, Stephanie, Hall, Nicholas M. J., Kiladis, George N.

“…A dynamical model is constructed of the northern summertime global circulation, maintained by empirically derived forcing, based on the same dynamical code…”
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The Extratropical Signal Generated by a Midlatitude SST Anomaly. Part I: Sensitivity at Equilibrium by Hall, Nicholas M. J., Derome, Jacques, Lin, Hai

“…A simple GCM (SGCM) is constructed by adding empirically derived time-independent forcing terms to a dry primitive equation model. This yields a model with…”
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Extratropical Summertime Response to Tropical Interannual Variability in an Idealized GCM by Hall, Nicholas M. J., Douville, Hervé, Li, Laurent

“…A primitive equation model is used to investigate the role of the tropics in generating seasonal-mean anomalies in the extratropics. A nudging technique is…”
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Relationship between interhemispheric Rossby wave propagation and South Atlantic convergence zone during La Niña years by Braga, Hugo A., Ambrizzi, Tercio, Hall, Nicholas M. J.

“…Through a set of observational analyses and baroclinic model experiments, we show that during La Niña conditions a wave train in North Pacific propagates…”
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South Atlantic Convergence Zone as Rossby wave source by Braga, Hugo A., Ambrizzi, Tercio, Hall, Nicholas M. J.

“…We investigate the possibility for the South Atlantic Convergence Zone (SACZ) to act as a Rossby wave source for global scale teleconnections. A simple heating…”
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Remote influence on regional scale intraseasonal rainfall variability over Vietnam by Le, Hong‐Hanh, Hall, Nicholas M. J., Ngo‐Duc, Thanh

“…Remote influences on intraseasonal anomalous rainfall over regions that encompass North and South Vietnam are explored using a 38‐year (1979–2016) global…”
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The Extratropical Signal Generated by a Midlatitude SST Anomaly. Part II: Influence on Seasonal Forecasts by Hall, Nicholas M. J., Lin, Hai, Derome, Jacques

“…A simple GCM based on a primitive equation model with empirically derived time-independent forcing is used to make forecasts in the extended to seasonal range…”
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Transient contributions to the forcing of the atmospheric annual cycle by Hall, Nicholas M. J, Leroux, Stephanie, Ambrizzi, Tercio

“…The forcing of the global circulation is examined using a primitive equation model and a 38-year reanalysis dataset. One-timestep integrations are initialised…”
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A climatological study of transient–mean‐flow interactions over West Africa by Leroux, Stephanie, Hall, Nicholas M. J., Kiladis, George N.

“…A statistical study is made of the relationship between intraseasonal variations in mid‐tropospheric flow over West Africa and transient‐eddy activity during…”
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Giant ice rings on lakes Baikal and Hovsgol: Inventory, associated water structure and potential formation mechanism by Kouraev, Alexei V., Zakharova, Elena A., Rémy, Frédérique, Kostianoy, Andrey G., Shimaraev, Michail N., Hall, Nicholas M. J., Ya. Suknev, Andrey

“…Observations of giant ice rings on Lake Baikal (Russia) have recently sparked scientific and public interest. However, there is still no clear consensus on…”
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A GCM Simulation of the Climate 6000 Years Ago by Hall, Nicholas M. J., Valdes, Paul J.

“…Two 10-yr integrations of the UGAMP GCM are presented. Each has a full seasonal cycle, T42 resolution, interactive land and sea ice, and prescribed sea surface…”
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Transient contributions to the forcing of the atmospheric annual cycle: A diagnostic study with the DREAM model by Hall, Nicholas M. J., Leroux, Stephanie, Ambrizzi, Tercio

“…The forcing of the global circulation is examined using a primitive equation model and a 38-year reanalysis dataset. One-timestep integrations are initialised…”
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Giant ice rings on lakes and field observations of lens-like eddies in the Middle Baikal (2016–2017) by Kouraev, Alexei V., Zakharova, Elena A., Rémy, Frédérique, Kostianoy, Andrey G., Shimaraev, Mikhail N., Hall, Nicholas M. J., Zdorovennov, Roman E., Suknev, Andrey Ya

“…Giant ice rings (diameter 5–7 km) detected on lakes Baikal (Russia) and Hovsgol (Mongolia) are a surface manifestation of intrathermocline lens-like eddies…”
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The Maintenance of the Last Great Ice Sheets: A UGAMP GCM Study by Hall, Nicholas M. J., Valdes, Paul J., Dong, Buwen

“…A 5-yr simulation of the last glacial maximum using the UGAMP GCM is presented. It has a full seasonal cycle, T42 resolution, and interactive land surface and…”
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Giant ice rings on lakes B aikal and H ovsgol: Inventory, associated water structure and potential formation mechanism by Kouraev, Alexei V., Zakharova, Elena A., Rémy, Frédérique, Kostianoy, Andrey G., Shimaraev, Michail N., Hall, Nicholas M. J., Ya. Suknev, Andrey

“…Abstract Observations of giant ice rings on Lake Baikal (Russia) have recently sparked scientific and public interest. However, there is still no clear…”
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