Atmospheric kinetic energy spectra from global high-resolution nonhydrostatic simulations

William C. Skamarock, Sang Hun Park, Joseph B. Klemp, Chris Snyder

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

Kinetic energy (KE) spectra derived from global high-resolution atmospheric simulations from the Model for Prediction Across Scales (MPAS) are presented. The simulations are produced using quasi-uniform global Voronoi horizontal meshes with 3-, 7.5-, and 15-km mean cell spacings. KE spectra from the MPAS simulations compare well with observations and other simulations in the literature and possess the canonical KE spectra structure including a very-well-resolved shallow-sloped mesoscale region in the 3-km simulation. There is a peak in the vertical velocity variance at the model filter scale for all simulations, indicating the underresolved nature of updrafts even with the 3-km mesh. The KE spectra reveal that the MPAS configuration produces an effective model resolution (filter scale) of approximately 6Δx. Comparison with other published model KE spectra highlight model filtering issues, specifically insufficient filtering that can lead to spectral blocking and the production of erroneous shallow-sloped mesoscale tails in the KE spectra. The mesoscale regions in the MPAS KE spectra are produced without use of kinetic energy backscatter, in contrast to other results reported in the literature. No substantive difference is found in KE spectra computed on constant height or constant pressure surfaces. Stratified turbulence is not resolved with the vertical resolution used in this study; hence, the results do not support recent conjecture that stratified turbulence explains the mesoscale portion of the KE spectrum.

Original languageEnglish
Pages (from-to)4369-4381
Number of pages13
JournalJournal of the Atmospheric Sciences
Volume71
Issue number11
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

kinetic energy
simulation
prediction
turbulence
filter
updraft
surface pressure
backscatter
spacing

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

Skamarock, William C. ; Park, Sang Hun ; Klemp, Joseph B. ; Snyder, Chris. / Atmospheric kinetic energy spectra from global high-resolution nonhydrostatic simulations. In: Journal of the Atmospheric Sciences. 2014 ; Vol. 71, No. 11. pp. 4369-4381.
@article{0bcb43d425064027be141dc8f01313b4,
title = "Atmospheric kinetic energy spectra from global high-resolution nonhydrostatic simulations",
abstract = "Kinetic energy (KE) spectra derived from global high-resolution atmospheric simulations from the Model for Prediction Across Scales (MPAS) are presented. The simulations are produced using quasi-uniform global Voronoi horizontal meshes with 3-, 7.5-, and 15-km mean cell spacings. KE spectra from the MPAS simulations compare well with observations and other simulations in the literature and possess the canonical KE spectra structure including a very-well-resolved shallow-sloped mesoscale region in the 3-km simulation. There is a peak in the vertical velocity variance at the model filter scale for all simulations, indicating the underresolved nature of updrafts even with the 3-km mesh. The KE spectra reveal that the MPAS configuration produces an effective model resolution (filter scale) of approximately 6Δx. Comparison with other published model KE spectra highlight model filtering issues, specifically insufficient filtering that can lead to spectral blocking and the production of erroneous shallow-sloped mesoscale tails in the KE spectra. The mesoscale regions in the MPAS KE spectra are produced without use of kinetic energy backscatter, in contrast to other results reported in the literature. No substantive difference is found in KE spectra computed on constant height or constant pressure surfaces. Stratified turbulence is not resolved with the vertical resolution used in this study; hence, the results do not support recent conjecture that stratified turbulence explains the mesoscale portion of the KE spectrum.",
author = "Skamarock, {William C.} and Park, {Sang Hun} and Klemp, {Joseph B.} and Chris Snyder",
year = "2014",
month = "1",
day = "1",
doi = "10.1175/JAS-D-14-0114.1",
language = "English",
volume = "71",
pages = "4369--4381",
journal = "Journals of the Atmospheric Sciences",
issn = "0022-4928",
publisher = "American Meteorological Society",
number = "11",

}

Atmospheric kinetic energy spectra from global high-resolution nonhydrostatic simulations. / Skamarock, William C.; Park, Sang Hun; Klemp, Joseph B.; Snyder, Chris.

In: Journal of the Atmospheric Sciences, Vol. 71, No. 11, 01.01.2014, p. 4369-4381.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Atmospheric kinetic energy spectra from global high-resolution nonhydrostatic simulations

AU - Skamarock, William C.

AU - Park, Sang Hun

AU - Klemp, Joseph B.

AU - Snyder, Chris

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Kinetic energy (KE) spectra derived from global high-resolution atmospheric simulations from the Model for Prediction Across Scales (MPAS) are presented. The simulations are produced using quasi-uniform global Voronoi horizontal meshes with 3-, 7.5-, and 15-km mean cell spacings. KE spectra from the MPAS simulations compare well with observations and other simulations in the literature and possess the canonical KE spectra structure including a very-well-resolved shallow-sloped mesoscale region in the 3-km simulation. There is a peak in the vertical velocity variance at the model filter scale for all simulations, indicating the underresolved nature of updrafts even with the 3-km mesh. The KE spectra reveal that the MPAS configuration produces an effective model resolution (filter scale) of approximately 6Δx. Comparison with other published model KE spectra highlight model filtering issues, specifically insufficient filtering that can lead to spectral blocking and the production of erroneous shallow-sloped mesoscale tails in the KE spectra. The mesoscale regions in the MPAS KE spectra are produced without use of kinetic energy backscatter, in contrast to other results reported in the literature. No substantive difference is found in KE spectra computed on constant height or constant pressure surfaces. Stratified turbulence is not resolved with the vertical resolution used in this study; hence, the results do not support recent conjecture that stratified turbulence explains the mesoscale portion of the KE spectrum.

AB - Kinetic energy (KE) spectra derived from global high-resolution atmospheric simulations from the Model for Prediction Across Scales (MPAS) are presented. The simulations are produced using quasi-uniform global Voronoi horizontal meshes with 3-, 7.5-, and 15-km mean cell spacings. KE spectra from the MPAS simulations compare well with observations and other simulations in the literature and possess the canonical KE spectra structure including a very-well-resolved shallow-sloped mesoscale region in the 3-km simulation. There is a peak in the vertical velocity variance at the model filter scale for all simulations, indicating the underresolved nature of updrafts even with the 3-km mesh. The KE spectra reveal that the MPAS configuration produces an effective model resolution (filter scale) of approximately 6Δx. Comparison with other published model KE spectra highlight model filtering issues, specifically insufficient filtering that can lead to spectral blocking and the production of erroneous shallow-sloped mesoscale tails in the KE spectra. The mesoscale regions in the MPAS KE spectra are produced without use of kinetic energy backscatter, in contrast to other results reported in the literature. No substantive difference is found in KE spectra computed on constant height or constant pressure surfaces. Stratified turbulence is not resolved with the vertical resolution used in this study; hence, the results do not support recent conjecture that stratified turbulence explains the mesoscale portion of the KE spectrum.

UR - http://www.scopus.com/inward/record.url?scp=84910128722&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84910128722&partnerID=8YFLogxK

U2 - 10.1175/JAS-D-14-0114.1

DO - 10.1175/JAS-D-14-0114.1

M3 - Article

AN - SCOPUS:84910128722

VL - 71

SP - 4369

EP - 4381

JO - Journals of the Atmospheric Sciences

JF - Journals of the Atmospheric Sciences

SN - 0022-4928

IS - 11

ER -