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The Vertical Structure of Tropical Temperature Change in Global Storm-Resolving Model Simulations of Climate Change
  • +8
  • Timothy M. Merlis,
  • Ilai Guendelman,
  • Kai-Yuan Cheng,
  • Lucas Harris,
  • Yan-Ting Chen,
  • Christopher S. Bretherton,
  • Maximilien Bolot,
  • Linjiong Zhou,
  • Alex David Kaltenbaugh,
  • Spencer Koncius Clark,
  • Stephan Fueglistaler
Timothy M. Merlis
Princeton University

Corresponding Author:[email protected]

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Ilai Guendelman
Princeton University
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Kai-Yuan Cheng
Princeton University
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Lucas Harris
GFDL
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Yan-Ting Chen
McGill University
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Christopher S. Bretherton
Allen Institute for Artificial Intelligence
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Maximilien Bolot
Princeton University
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Linjiong Zhou
Cooperative Institute for Modeling Earth Systems, and Program on Atmospheric and Oceanic Sciences, Princeton University
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Alex David Kaltenbaugh
UCAR
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Spencer Koncius Clark
Allen Institute for Artificial Intelligence / NOAA-GFDL
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Stephan Fueglistaler
Princeton University
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Abstract

Global storm-resolving model (GSRM) simulations (kilometer-scale horizontal resolution) of the atmosphere can capture the interaction between the scales of deep cumulus convection and the large-scale dynamics and thermodynamic properties of the atmosphere. Here, we assess the vertical structure of tropical temperature change in the GSRM X-SHiELD, developed by the Geophysical Fluid Dynamics Laboratory, perturbed by a uniform sea surface temperature (SST) warming and/or increased CO2 concentration. The simulated response to SST warming shows weakly amplified warming from the surface through the mid-troposphere before increasing to a factor of about 2.5 near the tropopause. This combination of muted warming in the mid-troposphere and amplified warming aloft is within the range of CMIP6 models at individual pressure levels but, taken together, is distinctive behavior. The response to CO2 increase with unchanged SST is an approximately vertically uniform warming, comparable to CMIP6 models, and is linearly additive with the SST-induced warming in X-SHiELD.
25 Jul 2024Submitted to ESS Open Archive
25 Jul 2024Published in ESS Open Archive