The local balances of vorticity and heat for blocking anticyclones in a spectral general circulation model.

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Blocking anticylones that appear in perpetual January simulations of a spectral general circulation model are examined. Blocks in three geographical regions are studied: the North Pacific, the North Atlantic and western North America. Local time-averaged balances of vorticity and heat are evaluated for composite cases of blocking. A number of common relationships emerged from these budgets, and are discussed. A quasi-geostrophic diagnosis of the ageostrophic motion field suggests that dynamical processes which strongly affect the vorticity balance may be more important to the maintenance of model blocks than processes which strongly affect the heat balance. The mountains appear capable of influencing the shape of the model blocks, but preliminary results indicate that orographic forcing may not be absolutely essential for the blocking process to occur in the model. -from Author

Original languageEnglish (US)
Pages (from-to)1406-1441
Number of pages36
JournalJournal of the Atmospheric Sciences
Volume43
Issue number13
StatePublished - 1986
Externally publishedYes

Fingerprint

anticyclone
vorticity
general circulation model
heat balance
geographical region
mountain
simulation

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

@article{59ca3828552b40438eb669634b3b069b,
title = "The local balances of vorticity and heat for blocking anticyclones in a spectral general circulation model.",
abstract = "Blocking anticylones that appear in perpetual January simulations of a spectral general circulation model are examined. Blocks in three geographical regions are studied: the North Pacific, the North Atlantic and western North America. Local time-averaged balances of vorticity and heat are evaluated for composite cases of blocking. A number of common relationships emerged from these budgets, and are discussed. A quasi-geostrophic diagnosis of the ageostrophic motion field suggests that dynamical processes which strongly affect the vorticity balance may be more important to the maintenance of model blocks than processes which strongly affect the heat balance. The mountains appear capable of influencing the shape of the model blocks, but preliminary results indicate that orographic forcing may not be absolutely essential for the blocking process to occur in the model. -from Author",
author = "Steven Mullen",
year = "1986",
language = "English (US)",
volume = "43",
pages = "1406--1441",
journal = "Journals of the Atmospheric Sciences",
issn = "0022-4928",
publisher = "American Meteorological Society",
number = "13",

}

TY - JOUR

T1 - The local balances of vorticity and heat for blocking anticyclones in a spectral general circulation model.

AU - Mullen, Steven

PY - 1986

Y1 - 1986

N2 - Blocking anticylones that appear in perpetual January simulations of a spectral general circulation model are examined. Blocks in three geographical regions are studied: the North Pacific, the North Atlantic and western North America. Local time-averaged balances of vorticity and heat are evaluated for composite cases of blocking. A number of common relationships emerged from these budgets, and are discussed. A quasi-geostrophic diagnosis of the ageostrophic motion field suggests that dynamical processes which strongly affect the vorticity balance may be more important to the maintenance of model blocks than processes which strongly affect the heat balance. The mountains appear capable of influencing the shape of the model blocks, but preliminary results indicate that orographic forcing may not be absolutely essential for the blocking process to occur in the model. -from Author

AB - Blocking anticylones that appear in perpetual January simulations of a spectral general circulation model are examined. Blocks in three geographical regions are studied: the North Pacific, the North Atlantic and western North America. Local time-averaged balances of vorticity and heat are evaluated for composite cases of blocking. A number of common relationships emerged from these budgets, and are discussed. A quasi-geostrophic diagnosis of the ageostrophic motion field suggests that dynamical processes which strongly affect the vorticity balance may be more important to the maintenance of model blocks than processes which strongly affect the heat balance. The mountains appear capable of influencing the shape of the model blocks, but preliminary results indicate that orographic forcing may not be absolutely essential for the blocking process to occur in the model. -from Author

UR - http://www.scopus.com/inward/record.url?scp=0022856373&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0022856373&partnerID=8YFLogxK

M3 - Article

VL - 43

SP - 1406

EP - 1441

JO - Journals of the Atmospheric Sciences

JF - Journals of the Atmospheric Sciences

SN - 0022-4928

IS - 13

ER -