Search Results - "Grams, C. M"

Modulation of Atmospheric River Occurrence and Associated Precipitation Extremes in the North Atlantic Region by European Weather Regimes by Pasquier, J. T., Pfahl, S., Grams, C. M.

“…The variability of large‐scale moisture transport by atmospheric rivers (AR) and its linkage to precipitation extremes in the North Atlantic‐European region is…”
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Importance of latent heat release in ascending air streams for atmospheric blocking by Pfahl, S., Schwierz, C., Croci-Maspoli, M., Grams, C. M., Wernli, H.

“…Atmospheric blocking can contribute to extreme weather events. A Lagrangian approach applied to reanalysis data shows that a large fraction of air masses are…”
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Influence of blocking on Northern European and Western Russian heatwaves in large climate model ensembles by Schaller, N, Sillmann, J, Anstey, J, Fischer, E M, Grams, C M, Russo, S

“…Better preparedness for summer heatwaves could mitigate their adverse effects on society. This can potentially be attained through an increased understanding…”
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Flow‐Dependence of Ensemble Spread of Subseasonal Forecasts Explored via North Atlantic‐European Weather Regimes by Spaeth, J., Rupp, P., Osman, M., Grams, C. M., Birner, T.

“…Atmospheric prediction at 2–6 weeks lead time (so‐called subseasonal‐to‐seasonal timescales) entails large forecast uncertainty. Here we investigate the…”
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Atmospheric processes triggering the central European floods in June 2013 by Grams, C. M, Binder, H, Pfahl, S, Piaget, N, Wernli, H

“…In June 2013, central Europe was hit by a century flood affecting the Danube and Elbe catchments after a 4 day period of heavy precipitation and causing severe…”
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Everything Hits at Once: How Remote Rainfall Matters for the Prediction of the 2021 North American Heat Wave by Oertel, A., Pickl, M., Quinting, J. F., Hauser, S., Wandel, J., Magnusson, L., Balmaseda, M., Vitart, F., Grams, C. M.

“…In June 2021, Western North America experienced an intense heat wave with unprecedented temperatures and far‐reaching socio‐economic consequences. Anomalous…”
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Uplift of Saharan dust south of the intertropical discontinuity by Marsham, J. H., Parker, D. J., Grams, C. M., Taylor, C. M., Haywood, J. M.

“…In situ observations from a flight made during the Geostationary Earth Radiation Budget Intercomparison of Longwave and Shortwave Radiation (GERBILS) field…”
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Three-dimensional visualization of ensemble weather forecasts – Part 2: Forecasting warm conveyor belt situations for aircraft-based field campaigns by Rautenhaus, M, Grams, C. M, Schäfler, A, Westermann, R

“…We present the application of interactive three-dimensional (3-D) visualization of ensemble weather predictions to forecasting warm conveyor belt situations…”
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Linking Low‐Frequency Large‐Scale Circulation Patterns to Cold Air Outbreak Formation in the Northeastern North Atlantic by Papritz, L., Grams, C. M.

“…The regional variability of wintertime marine cold air outbreaks (CAOs) in the northeastern North Atlantic is studied focusing on the role of weather regimes…”
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Dynamics of concurrent and sequential Central European and Scandinavian heatwaves by Spensberger, C., Madonna, E., Boettcher, M., Grams, C. M., Papritz, L., Quinting, J. F., Röthlisberger, M., Sprenger, M., Zschenderlein, P.

“…In both 2003 and 2018 a heatwave in Scandinavia in July was followed by a heatwave in Central Europe in August. Whereas the transition occurred abruptly in…”
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Observations of mesoscale and boundary-layer scale circulations affecting dust transport and uplift over the Sahara by Marsham, J. H., Parker, D. J., Grams, C. M., Johnson, B. T., Grey, W. M. F., Ross, A. N.

“…Observations of the Saharan boundary layer, made during the GERBILS field campaign, show that mesoscale land surface temperature variations (which were related…”
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The Atlantic inflow to the Saharan heat low: observations and modelling by Grams, C. M., Jones, S. C., Marsham, J. H., Parker, D. J., Haywood, J. M., Heuveline, V.

“…The inflow of relatively cold and stably stratified air from the Atlantic Ocean into western Mauritania and into the southwestern part of the Saharan heat low…”
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Towards a process-oriented understanding of the impact of stochastic perturbations on the model climate by Deinhard, Moritz, Grams, Christian M.

“…Stochastic parametrisation techniques have been used by operational weather centres for decades to produce ensemble forecasts and to represent uncertainties in…”
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Interaction of microphysics and dynamics in a warm conveyor belt simulated with the ICOsahedral Nonhydrostatic (ICON) model by Oertel, Annika, Miltenberger, Annette K, Grams, Christian M, Hoose, Corinna

“…Warm conveyor belts (WCBs) produce a major fraction of precipitation in extratropical cyclones and modulate the large-scale extratropical circulation. Diabatic…”
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EuLerian Identification of ascending AirStreams (ELIAS 2.0) in numerical weather prediction and climate models – Part 1: Development of deep learning model by Quinting, Julian F, Grams, Christian M

“…Physical processes on the synoptic scale are important modulators of the large-scale extratropical circulation. In particular, rapidly ascending airstreams in…”
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Precursors and pathways: dynamically informed extreme event forecasting demonstrated on the historic Emilia-Romagna 2023 flood by Dorrington, Joshua, Wenta, Marta, Grazzini, Federico, Magnusson, Linus, Vitart, Frederic, Grams, Christian M

“…The ever-increasing complexity and data volumes of numerical weather prediction demand innovations in the analysis and synthesis of operational forecast data…”
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Aerosol–cloud–radiation interaction during Saharan dust episodes: the dusty cirrus puzzle by Seifert, Axel, Bachmann, Vanessa, Filipitsch, Florian, Förstner, Jochen, Grams, Christian M, Hoshyaripour, Gholam Ali, Quinting, Julian, Rohde, Anika, Vogel, Heike, Wagner, Annette, Vogel, Bernhard

“…Dusty cirrus clouds are extended optically thick cirrocumulus decks that occur during strong mineral dust events. So far they have mostly been documented over…”
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The role of North Atlantic–European weather regimes in the surface impact of sudden stratospheric warming events by Domeisen, Daniela I. V., Grams, Christian M., Papritz, Lukas

“…Sudden stratospheric warming (SSW) events can significantly impact tropospheric weather for a period of several weeks, in particular in the North…”
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Linking Gulf Stream air–sea interactions to the exceptional blocking episode in February 2019: a Lagrangian perspective by Wenta, Marta, Grams, Christian M., Papritz, Lukas, Federer, Marc

“…The development of atmospheric blocks over the North Atlantic–European region can lead to extreme weather events like heat waves or cold air outbreaks. Despite…”
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EuLerian Identification of ascending AirStreams (ELIAS 2.0) in numerical weather prediction and climate models – Part 2: Model application to different datasets by Quinting, Julian F, Grams, Christian M, Oertel, Annika, Pickl, Moritz

“…Warm conveyor belts (WCBs) affect the atmospheric dynamics in midlatitudes and are highly relevant for total and extreme precipitation in many parts of the…”
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