Linjiong Zhou

Integrating a Three‐Dimensional TKE‐Based Subgrid Diffusion Scheme Into GFDL FV3

Kun Gao, Lucas Harris, Ping Zhu, Linjiong Zhou et autres

Abstract We present the implementation of an inline three‐dimensional (3D) turbulent kinetic energy (TKE)‐based subgrid diffusion scheme in the Geophysical Fluid Dynamics Laboratory (GFDL) Finite‐Volume Cubed‐Sphere (FV3) dynamical core. This scheme addresses the need for a unified and physically grounded treatment of …

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Integrating a Three-dimensional TKE-based Subgrid Diffusion Scheme into GFDL FV3

Kun Gao, Lucas Harris, Ping Zhu, Linjiong Zhou et autres

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Evaluation of Severe Weather Forecasts from Real-Time Medium-Range Convection-Allowing Ensembles over the Conterminous United States

Craig S. Schwartz, Ryan A. Sobash, Lucas M. Harris, David Ahijevych et autres

Abstract During both spring 2023 and 2024, we produced two sets of experimental, real-time, medium-range (3–8 days) convection-allowing ensemble (CAE) forecasts with variable-resolution global models that had 3-km horizontal cell spacing over the conterminous United States (CONUS). One ensemble had 10 members, …

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Quantifying the Value of Convection-Allowing Global-Nested Ensembles for Extended-Range Severe Weather Forecasting

Michael J. Hosek, Kimberly A. Hoogewind, Adam J. Clark, Lucas Harris et autres

Abstract Convection-allowing models (CAMs) provide valuable information on convective storm timing, mode, intensity, and evolution compared to coarser-resolution models with parameterized convection. This information is useful for severe weather forecasting at 1–2-day lead times. At longer lead times, there is not currently …

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Coupling techniques in the new high-resolution SHiELD: implicit land-atmosphere coupling.

Joseph Mouallem, Sergey Malyshev, Kun Gao, Zhihong Tan et autres

As part of the development of GFDL’s new high resolution, seamless weather to S2S to climate timescale coupled model, we present the integration of GFDL’s atmospheric model SHiELD and land model LM4, enabling a suite of Earth system interactions, including extreme hydroclimate …

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Evaluating Snowfall Forecasts over the Midwestern and Eastern United States in the GFDL C-SHiELD Model

Bin Han, Linjiong Zhou, Lucas Harris, Kai‐Yuan Cheng

Abstract Accurately forecasting snowfall remains challenging, and previous studies indicate that models often overestimate snowfall. However, key drivers of this bias are poorly understood. In this study, we evaluate the performance of the Geophysical Fluid Dynamics Laboratory’s (GFDL) Continental System for High-Resolution …

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Response of Global Mesoscale Convective Systems to Increased CO 2 and Uniform SST Warming in a Global Storm‐Resolving Model

Wenhao Dong, Ming Zhao, Lucas Harris, Kai‐Yuan Cheng et autres

Abstract Mesoscale convective systems (MCSs) are critical components of global energy and water cycles and significantly contribute to extreme weather events. However, projecting future MCS behavior remains challenging due to the limitations of regional models and the inadequate representation of MCSs in …

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Closing the Gap—Hurricane Prediction Advances in the U.S. FV3-Based Models

Jan‐Huey Chen, Timothy Marchok, Morris A. Bender, Kun Gao et autres

Abstract The Integrated Forecasting System (IFS) developed by the European Centre for Medium-Range Weather Forecasts (ECMWF) has been regarded as the best guidance for hurricane track forecasts for years. However, the performance of U.S. models on hurricane forecasts has been catching up. …

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The Land‐Ocean Contrast in Deep Convective Intensity in a Global Storm‐Resolving Model

Tristan H. Abbott, Nadir Jeevanjee, Kai‐Yuan Cheng, Linjiong Zhou et autres

Abstract Observations reveal a clear difference in the intensity of deep convection over tropical land and ocean. This observed land‐ocean contrast provides a natural benchmark for evaluating the fidelity of global storm‐resolving models (GSRMs; global models with horizontal resolution on the order …

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Detecting Changes in Large-Scale Metrics of Climate in Short Integrations of a Global Storm-Resolving Model of the Atmosphere

Ilai Guendelman, Timothy M. Merlis, Kai‐Yuan Cheng, Lucas Harris et autres

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Comparison of Global Mesoscale Convective System Simulations in a Global Storm-Resolving Model and a High-Resolution General Circulation Model

Wenhao Dong, Ming Zhao, Huan Guo, Lucas Harris et autres

Abstract This study compares the characteristics of global mesoscale convective systems (MCSs) simulated in a global storm-resolving model (GSRM) and a high-resolution (∼25-km) general circulation model (GCM), both developed at the Geophysical Fluid Dynamics Laboratory. By comparing with two satellite datasets, we …

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Western United States wintertime precipitation response to warming: an assessment in a global storm-resolving model

Tsung‐Lin Hsieh, Lucas Harris, Kai‐Yuan Cheng, Alexander D. Kaltenbaugh et autres

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