An Overview of the Atmospheric Component of the Energy Exascale Earth System Model
By Philip J. Rasch, S. Xie, P. Ma, Wuyin Lin, Hailong Wang, Q. Tang, Susannah Burrows, Peter M. Caldwell, Kai Zhang, R. Easter and 32 more. Journal of Advances in Modeling Earth Systems, 2019
222 citations recorded by the source corpus.
The Energy Exascale Earth System Model Atmosphere Model version 1, the atmospheric component of the Department of Energy's Energy Exascale Earth System Model is described. The model began as a fork of the well‐known Community Atmosphere Model, but it has evolved in new ways, and coding, performance, resolution, physical processes (primarily cloud and aerosols formulations), testing and development procedures now differ significantly. Vertical resolution was increased (from 30 to 72 layers), and the model top extended to 60 km (~0.1 hPa). A simple ozone photochemistry predicts stratospheric ozone, and the model now supports increased and more realistic variability in the upper troposphere and stratosphere. An optional improved treatment of light‐absorbing particle deposition to snowpack and ice is available, and stronger connections with Earth system biogeochemistry can be used for some science problems. Satellite and ground‐based cloud and aerosol simulators were implemented to facilitate evaluation of clouds, aerosols, and aerosol‐cloud interactions. Higher horizontal and vertical resolution, increased complexity, and more predicted and transported variables have increased the model computational cost and changed the simulations considerably. These changes required development of alternate strategies for tuning and evaluation as it was not feasible to “brute force” tune the high‐resolution configurations, so short‐term hindcasts, perturbed parameter ensemble simulations, and regionally refined simulations provided guidance on tuning and parameterization sensitivity to higher resolution. A brief overview of the model and model climate is provided. Model fidelity has generally improved compared to its predecessors and the CMIP5 generation of climate models.
Subfields: Atmospheric Science, Global and Planetary Change
View Paper: https://www.semanticscholar.org/paper/e8e0be1b2ae16b1cda850c1c4e0ea860859c71ed
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Citations in the corpus
- Improved Diurnal Cycle of Precipitation in E3SM With a Revised Convective Triggering Function (2019, methodology): “More details about EAMv1 are referred to Rasch et al. (2019), which provided an overview of the model.”
- The DOE E3SM Coupled Model Version 1: Description and Results at High Resolution (2019, methodology): “The impact of increased vertical resolution on E3SM is discussed in Rasch et al. (2019) and Xie et al. (2018).”
- The DOE E3SM Coupled Model Version 1: Overview and Evaluation at Standard Resolution (2019, unknown): “3 to CAM6, many details of tuning, and cloud and aerosols formulations differ in important ways as described in Rasch et al. (2019).”