Realistic quasi‐biennial oscillations in a simulation of the global climate

Scaife, Adam A.; Butchart, Neal; Warner, Christopher D.; Stainforth, David A.; Norton, W. A.; Austin, J.

doi:10.1029/2000gl011625

Cited by 175 publications

(180 citation statements)

References 25 publications

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“…The orographic gravity wave scheme allows for blocking as well as gravity wave drag and has been shown to improve the general circulation (McFarlane 1987, Webster et al 2003. Similarly, the spectral scheme has been shown to improve tropical stratospheric simulations (Scaife et al 2000(Scaife et al , 2002.…”

Section: Gravity Wave Dragmentioning

confidence: 99%

Implementation of the initial ACCESS numerical weather prediction system

Puri¹,

Dietachmayer²,

Steinle³

et al. 2013

AMOJ

135

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: Gravity Wave Dragmentioning

confidence: 99%

Implementation of the initial ACCESS numerical weather prediction system

Puri¹,

Dietachmayer²,

Steinle³

et al. 2013

AMOJ

135

103

View full text Add to dashboard Cite

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“…In the MetUM, orographic gravity waves are parametrized by the Webster et al (2003) scheme. In addition, the MetUM employs the Warner-McIntyre 'ultra-simple' spectral gravity wave parametrization scheme to represent the effects of non-orographic waves (Warner and McIntyre, 1999;Warner et al, 2005;Scaife et al 2000Scaife et al , 2002. This uses an assumed initial vertical wave number spectrum and constant wave stress in the four cardinal directions.…”

Section: Time Mean Ep Fluxesmentioning

confidence: 99%

Stratospheric gravity waves revealed in NWP model forecasts

Shutts¹

2011

Quart J Royal Meteoro Soc

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Current operational numerical weather prediction models potentially have sufficient spatial and temporal resolution to resolve much of the inertia-gravity wave spectrum (e.g. horizontal wavelengths in the region of 100-1000 km typically, and even longer zonal wavelengths in the Tropics). The effects of gravity wave dynamics are usually considered to be subgrid-scale and parametrizable, either as stationary, mountain waves or travelling, non-orographic waves. Simple techniques for isolating these waves in both the

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“…Here we have found that the inclusion of nonhydrostatic wave dynamics itself has the tendency to develop an effective latitudinal distribution of launch E-P flux with these characteristics and produce a QBO-like feature in the model. This suggests that a portion of the required enhancement of tropical launch E-P flux in Scaife et al (2000) and McLandress (2000) is also due to the neglect of nonhydrostatic wave effects in these studies.…”

Section: Discussionmentioning

confidence: 88%

“…Several studies have investigated the ability of climate models to produce a tropical QBO driven by the parameterized wave drag of hydrostatic non-orographic gravity-wave schemes (e.g., Scaife et al 2000;McLandress 2000). Generally, it is found that the magnitude of launch E-P flux must be enhanced in the tropics relative to the extra-tropics in order for the models to produce both a QBO and realistic mid-latitude mesospheric winds.…”

Section: Discussionmentioning

confidence: 99%

“…Recent studies have investigated the use of operational hydrostatic non-orographic GWD parameterization schemes 5 to induce a quasibiennial oscillation (QBO) in GCMs (Scaife et al 2000;McLandress 2000). Depending on the scheme and the GCM in which it is imple-mented, these studies have found that the value of integrated launch E-P flux must be enhanced in the tropics by 1.5 to 3 times that imposed at mid-latitudes.…”

Section: Multi-year Gcm Simulationsmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of Back-Reflection in the Parameterization of Non-Orographic Gravity-Wave Drag.

Scinocca¹

2002

Journal of the Meteorological Society of Japan

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An efficient method of solution is developed for the Warner and McIntyre parameterization of the drag associated with nonhydrostatic non-orographic inertia-gravity waves. The scheme is sufficiently fast as to enable, for the first time, fully interactive multi-year climate simulations that include the effects of rotation and nonhydrostatic wave dynamics in the parameterization of non-orographic gravity wave drag. It is found that the new scheme alleviates much of the middle-atmosphere wind biases that occur in the Canadian Middle Atmosphere Model when either of its two operational hydrostatic nonorographic gravity wave drag parameterizations are used.The addition of the nonhydrostatic process of back-reflection has an important impact on the amount momentum flux launched into the stratosphere by the parameterization scheme. This quantity is a free parameter in the problem and it is specified here to be independent of time and geographic location. However, due to back-reflection, the net momentum flux that actually enters the stratosphere undergoes a systematic seasonal and latitudinal variation which is a consequence of the seasonal and latitudinal variation of the winds and temperatures in the middle atmosphere. This strong influence results in a characteristic latitudinal distribution for the net momentum flux entering the stratosphere in winter and summer. During these seasons, mid-to high-latitude launch momentum flux that is directed oppositely to the mesospheric jet can be reduced by as much as 75% due to back-reflection. The momentum flux launched into the stratosphere at tropical latitudes, however, is relatively unaffected by backreflection. This has important implications for the forcing of tropical oscillations such as the semi-annual oscillation and the quasi-biennial oscillation in general circulation models.

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Realistic quasi‐biennial oscillations in a simulation of the global climate

Cited by 175 publications

References 25 publications

Implementation of the initial ACCESS numerical weather prediction system

Implementation of the initial ACCESS numerical weather prediction system

Stratospheric gravity waves revealed in NWP model forecasts

The Effect of Back-Reflection in the Parameterization of Non-Orographic Gravity-Wave Drag.

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