Numerical Integration of the Quasi-Geostrophic Equations for Barotropic and Simple Baroclinic Flows

Charney, J. G.; Phillips, Norman A.

doi:10.1175/1520-0469(1953)010<0071:niotqg>2.0.co;2

Cited by 345 publications

(200 citation statements)

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“…Moist processes are supported by the introduction of additional prognostic variables for the mixing-ratios of water-vapour, cloud-liquidwater, and cloud-frozen-water, all taken with respect to dry air. In terms of the grid layout of the variables, an Arakawa-C grid (Arakawa and Lamb 1977) is used in the horizontal, and a Charney-Phillips scheme in which thermodynamic and moisture variables are stored on model half-levels is used in the vertical (Charney and Phillips 1953).…”

Section: Dynamicsmentioning

confidence: 76%

Implementation of the initial ACCESS numerical weather prediction system

Puri¹,

Dietachmayer²,

Steinle³

et al. 2013

AMOJ

130

103

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The Australian Community Climate and Earth-System Simulator (ACCESS) is a coupled climate and earth system simulator being developed as a joint initiative of the Bureau of Meteorology and CSIRO in cooperation with the university community in Australia. The main aim of ACCESS is to develop a national approach to climate and weather prediction model development. Planning for ACCESS development commenced in 2005 and significant progress has been made subsequently. ACCESS-based numerical weather prediction (NWP) systems were implemented operationally by the Bureau in September 2009 and were marked by significantly increased forecast skill of close to one day for three-day forecasts over the previously operational systems. The fully-coupled ACCESS earth system model has been assembled and tested, and core runs have been completed and submitted for the Intergovernmental Panel for Climate Change (IPCC) Fifth Assessment Report. Significant progress has been made with ACCESS infrastructure including successful porting to both Solar and Vayu (National Computational Infrastructure (NCI)) machines and development of infrastructure to allow usage by university researchers. This paper provides a description of the NWP component of ACCESS and presents results from detailed verification of the system.

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Section: Dynamicsmentioning

confidence: 76%

Implementation of the initial ACCESS numerical weather prediction system

Puri¹,

Dietachmayer²,

Steinle³

et al. 2013

AMOJ

130

103

View full text Add to dashboard Cite

show abstract

“…3), using a staggered Arakawa-C grid (Arakawa & Lamb 1977) and a vertically staggered Charney-Phillips grid (Charney & Phillips 1953). The code uses a terrain following height-based vertical coordinate 1 .…”

Section: Overview Of the Numerical Schemementioning

confidence: 99%

The unified model, a fully-compressible, non-hydrostatic, deep atmosphere global circulation model, applied to hot Jupiters

Mayne

Baraffe

Acreman

et al. 2013

A&A

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261

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We are adapting the global circulation model (GCM) of the UK Met Office, the so-called unified model (UM), for the study of hot Jupiters. In this work we demonstrate the successful adaptation of the most sophisticated dynamical core, the component of the GCM which solves the equations of motion for the atmosphere, available within the UM, ENDGame (Even Newer Dynamics for General atmospheric modelling of the environment). Within the same numerical scheme ENDGame supports solution to the dynamical equations under varying degrees of simplification. We present results from a simple, shallow (in atmospheric domain) hot Jupiter model (SHJ), and a more realistic (with a deeper atmosphere) HD 209458b test case. For both test cases we find that the large-scale, time-averaged (over the 1200 days prescribed test period), dynamical state of the atmosphere is relatively insensitive to the level of simplification of the dynamical equations. However, problems exist when attempting to reproduce the results for these test cases derived from other models. For the SHJ case the lower (and upper) boundary intersects the dominant dynamical features of the atmosphere meaning the results are heavily dependent on the boundary conditions. For the HD 209458b test case, when using the more complete dynamical models, the atmosphere is still clearly evolving after 1200 days, and in a transient state. Solving the complete (deep atmosphere and non-hydrostatic) dynamical equations allows exchange between the vertical and horizontal momentum of the atmosphere, via Coriolis and metric terms. Subsequently, interaction between the upper atmosphere and the deeper more slowly evolving (radiatively inactive) atmosphere significantly alters the results, and acts over timescales longer than 1200 days.

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“…The MetUM dynamical core uses a semi-implicit, semiLagrangian formulation to solve the non-hydrostatic, fully compressible deep atmosphere equations of motion (Davies et al 2005) using prognostic fields discretised horizontally on the Arakawa-C grid (Arakawa and Lamb 1977) and vertically on terrain-following hybrid height levels using Charney-Phillips staggering (Charney and Phillips 1953). On the grid-scale, the MetUM dynamical core responds to the mean height of orography in a grid-box derived from the GloBal One-km Base Elevation dataset (GLOBE, GLOBE Task Team 1999), which has a native resolution of 30″.…”

Section: Metum Response To Orographymentioning

confidence: 99%

The resolution sensitivity of the South Asian monsoon and Indo-Pacific in a global 0.35° AGCM

et al. 2015

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and the Maritime Continent results in more precipitation over the Maritime Continent islands at the expense of reduced precipitation further north. We also evaluate the resolution sensitivity of monsoon depressions and lows, which contribute more precipitation over northeast India at higher resolution. We conclude that while increasing resolution at these scales does not solve the many monsoon biases that exist in GCMs, it has a number of small, beneficial impacts.

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Numerical Integration of the Quasi-Geostrophic Equations for Barotropic and Simple Baroclinic Flows

Cited by 345 publications

References 0 publications

Implementation of the initial ACCESS numerical weather prediction system

Implementation of the initial ACCESS numerical weather prediction system

The unified model, a fully-compressible, non-hydrostatic, deep atmosphere global circulation model, applied to hot Jupiters

The resolution sensitivity of the South Asian monsoon and Indo-Pacific in a global 0.35° AGCM

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