The ICON Earth System Model Version 1.0

Jungclaus, Johann; Lorenz, Stephan; Schmidt, Hauke; Gutjahr, Oliver; Haak, Helmuth; Mehlmann, Carolin; Mikolajewicz, Uwe; Notz, Dirk; Putrashan, Dian; Storch, Jin‐Song von; Linardakis, Leonidas; Brokvin, Victor; Chegini, Fatemeh; Gayler, Veronika; Giorgetta, Marco; Hagemann, Stefan; Ilyina, Tatiana; Korn, Peter; Kröger, Jürgen; Müller, Wolfgang A.; Pohlmann, Holger; Raddatz, Thomas; Ramme, Lennart; Christian, Reick H.; Schneck, Rainer; Schnur, Reiner; Stevens, Björn; Ziemen, Florian; Claußen, Martin; Marotzke, Jochem; Wachsmann, Fabian; Schupfner, Martin; Riddick, Thomas; Wieners, Karl-Hermann; Brüggemann, Nils; Redler, René; Vrese, Philipp de; Nabel, Julia E. M. S.; Sam, Teffy; Hanke, Moritz

doi:10.1002/essoar.10507989.1

2021

DOI: 10.1002/essoar.10507989.1

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The ICON Earth System Model Version 1.0

Johann Jungclaus

Stephan Lorenz

Hauke Schmidt

et al.

Abstract: ICON-ESM (V1.0) is the first release of the ICOsahedral Non-hydrostatic Earth System Model that is developed at the Max Planck Institute for Meteorology (MPI-M). It is based on the ICON framework, a joint development

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Cited by 3 publications

References 61 publications

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Wind Power Input to Ocean Near‐Inertial Waves Diagnosed From a 5‐km Global Coupled Atmosphere‐Ocean General Circulation Model

Storch

Lüschow

2023

JGR Oceans

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Together with internal tides and lee waves, near-inertial waves (NIWs) are considered as a main source of the canonical 2 TW of mixing energy required to sustain the global overturning circulation (Ferrari & Wunsch, 2009;Munk & Wunsch, 1998;Wunsch & Ferrari, 2004). Investigating the wind power input to surface near-inertial motions is an important step toward quantifying the power available for interior mixing arising from wind-induced NIWs. This investigation has a long history, beginning with estimates based on the mixed layer slab model of Pollard and Millard (1970) that is forced with observed surface wind stress (

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Wind Power Input to Ocean Near‐Inertial Waves Diagnosed From a 5‐km Global Coupled Atmosphere‐Ocean General Circulation Model

Storch

Lüschow

2023

JGR Oceans

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Intensification of daily tropical precipitation extremes from more organized convection

Bao,

Stevens,

Kluft

et al. 2024

Sci. Adv.

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Tropical precipitation extremes and their changes with surface warming are investigated using global storm resolving simulations and high-resolution observations. The simulations demonstrate that the mesoscale organization of convection, a process that cannot be physically represented by conventional global climate models, is important for the variations of tropical daily accumulated precipitation extremes. In both the simulations and observations, daily precipitation extremes increase in a more organized state, in association with larger, but less frequent, storms. Repeating the simulations for a warmer climate results in a robust increase in monthly-mean daily precipitation extremes. Higher precipitation percentiles have a greater sensitivity to convective organization, which is predicted to increase with warming. Without changes in organization, the strongest daily precipitation extremes over the tropical oceans increase at a rate close to Clausius-Clapeyron (CC) scaling. Thus, in a future warmer state with increased organization, the strongest daily precipitation extremes over oceans increase at a faster rate than CC scaling.

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Simulated range of mid-Holocene precipitation changes from extended lakes and wetlands over North Africa

2022

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Abstract. Enhanced summer insolation over North Africa induced a monsoon precipitation increase during the mid-Holocene, about 6000 years ago, and led to a widespread expansion of lakes and wetlands in the present-day Sahara. This expansion of lakes and wetlands is documented in paleoenvironmental sediment records, but the spatially sparse and often discontinuous sediment records provide only a fragmentary picture. Previous simulation studies prescribed either a small lake and wetland extent from reconstructions or focused on documented mega-lakes only to investigate their effect on the mid-Holocene climate. In contrast to these studies, we investigate the possible range of mid-Holocene precipitation changes in response to a small-lake extent and a potential maximum lake and wetland extent. Our study shows that during the summer monsoon season, the African rain belt is shifted about 2 to 7∘ farther north in simulations with a maximum lake or wetland extent than in simulations with a small lake extent. This northward extent is caused by a stronger and prolonged monsoon rainfall season over North Africa which is associated with an increased monsoon precipitation over the southern Sahara and an increased precipitation from tropical plumes over the northwestern Sahara. Replacing lakes with vegetated wetlands causes an enhanced precipitation increase, which is likely due to the high surface roughness of the wetlands. A moisture budget analysis reveals that both lakes and wetlands cause a local precipitation increase not only by enhanced evaporation but also by a stronger inland moisture transport and local moisture recycling to the south of Lake Chad and the west Saharan lakes. Analysis of the dynamic response shows that lakes and wetlands cause a circulation response inverse to the one associated with the Saharan heat low. Depending on the latitudinal position of the lakes and wetlands, they predominantly cause a northward shift or a decay of the African Easterly Jet. These results indicate that the latitudinal position of the lakes and wetlands strongly affects the northward extension of the African summer monsoon.

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The ICON Earth System Model Version 1.0

Abstract: ICON-ESM (V1.0) is the first release of the ICOsahedral Non-hydrostatic Earth System Model that is developed at the Max Planck Institute for Meteorology (MPI-M). It is based on the ICON framework, a joint development

Cited by 3 publications

References 61 publications

Wind Power Input to Ocean Near‐Inertial Waves Diagnosed From a 5‐km Global Coupled Atmosphere‐Ocean General Circulation Model

Wind Power Input to Ocean Near‐Inertial Waves Diagnosed From a 5‐km Global Coupled Atmosphere‐Ocean General Circulation Model

Intensification of daily tropical precipitation extremes from more organized convection

Simulated range of mid-Holocene precipitation changes from extended lakes and wetlands over North Africa

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