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Title: Reconciling and Improving Formulations for Thermodynamics and Conservation Principles in Earth System Models (ESMs)

Journal Article · · Journal of Advances in Modeling Earth Systems
DOI:https://doi.org/10.1029/2022MS003117· OSTI ID:1887625
ORCiD logo [1];  [2]; ORCiD logo [3];  [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7];  [8]; ORCiD logo [4];  [9]; ORCiD logo [10];  [11]; ORCiD logo [12]; ORCiD logo [1];  [1]; ORCiD logo [10]; ORCiD logo [13]; ORCiD logo [10]; ORCiD logo [1]; ORCiD logo [1]
  1. Climate and Global Dynamics Laboratory National Center for Atmospheric Research Boulder CO USA
  2. Department of Mathematics and Statistics McMaster University Hamilton ON Canada
  3. NORCE Research and Bjerknes Centre for Climate Research Bergen Norway, Department of Meteorology Stockholm University Stockholm Sweden
  4. Sandia National Laboratories Albuquerque NM USA
  5. Laboratoire de Météorologie Dynamique/IPSL École Polytechnique Palaiseau France
  6. Leibniz‐Institut fur Atmosphärenphysik Kühlungsborn Germany
  7. Department of Mathematical Sciences University of Wisconsin–Milwaukee Milwaukee WI USA, Pacific Northwest National Laboratory Atmospheric Sciences and Global Change Division Richland WA USA
  8. Department of Climate and Space Sciences and Engineering University of Michigan Ann Arbor MI USA
  9. Met Office Exeter UK
  10. Pacific Northwest National Laboratory Atmospheric Sciences and Global Change Division Richland WA USA
  11. CNRS Inria Grenoble INP LJK University Grenoble Alpes Grenoble France
  12. Department of Meteorology University of Reading Reading UK
  13. Lawrence Berkeley National Laboratory Berkeley CA USA

Abstract This paper provides a comprehensive derivation of the total energy equations for the atmospheric components of Earth System Models (ESMs). The assumptions and approximations made in this derivation are motivated and discussed. In particular, it is emphasized that closing the energy budget is conceptually challenging and hard to achieve in practice without resorting to ad hoc fixers. As a concrete example, the energy budget terms are diagnosed in a realistic climate simulation using a global atmosphere model. The largest total energy errors in this example are spurious dynamical core energy dissipation, thermodynamic inconsistencies (e.g., coupling parameterizations with the host model) and missing processes/terms associated with falling precipitation and evaporation (e.g., enthalpy flux between components). The latter two errors are not, in general, reduced by increasing horizontal resolution. They are due to incomplete thermodynamic and dynamic formulations. Future research directions are proposed to reconcile and improve thermodynamics formulations and conservation principles.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); National Oceanic and Atmospheric Administration (NOAA); German Research Foundation (DFG); Norwegian Research Council; European Research Council (ERC)
Grant/Contract Number:
AC05-76RL01830; AC02-05CH11231; NA0003525; AC52-07NA27344; 1852977; NA17OAR4320152; 274762653
OSTI ID:
1887625
Alternate ID(s):
OSTI ID: 1889775; OSTI ID: 1889813
Report Number(s):
PNNL-SA-176991; e2022MS003117
Journal Information:
Journal of Advances in Modeling Earth Systems, Journal Name: Journal of Advances in Modeling Earth Systems Vol. 14 Journal Issue: 9; ISSN 1942-2466
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

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