The physics of orographic gravity wave drag
Webb18 maj 2024 · According to Butchart et al. , the state-of-the-art chemistry–climate models show a good representation of the resolved wave contribution to driving the annual mean tropical upwelling at 70 hPa with a contribution of 70.7 % from resolved waves, 21.1 % from orographic gravity wave drag (parameterized in ERA5 and ERA-Interim), and 7.1 % from … WebbSearch 209,283,689 papers from all fields of science. Search. Sign In Create Free Account
The physics of orographic gravity wave drag
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WebbMichael Toy is a CIRES numerical weather prediction (NWP) model developer who works in the Earth Prediction Advancement Division (EPAD) of NOAA's Global Systems Laboratory. He works on developing and testing physics parameterizations, particularly gravity wave drag parameterizations, which represent the drag forces on the atmospheric flow due to … Webb30 sep. 2024 · Numerical simulations are carried out using the Weather Research and Forecast (WRF) model to calculate explicitly the ratio of orographic gravity-wave drag …
WebbAbstract. When orographic gravity waves (OGWs) break, they dissipate their momentum and energy and thereby influ-ence the thermal and dynamical structure of the atmosphere. This OGW forcing mainly takes place in the middle atmo-sphere. It is zonally asymmetric and strongly intermittent. So-called “OGW hotspot regions” have been shown to ex- Webb2.2 Gravity-wave drag 3 . Specification of subgrid-scale orography APPENDIX B List of symbols 1. GENERAL PRINCIPLES The influence of subgridscale orography on the momentum of the atmosphere, and hence on other parts of the phys - ics, is represented by a combination of lower-troposphere drag created by orography assumed to intersect …
Webb6 apr. 2024 · High-resolution multi-instrument measurements of orographic gravity waves over the Andes were carried out. Oblique gravity wave propagation and strong horizontal refraction were observed and analysed using ray-tracing. Significant redistribution of horizontal momentum due to horizontal refraction was observed all along the path of … Webb16 juni 2024 · We show that strong OGW drag events are associated with anomalous resolved wave propagation in the stratosphere. Causal links are inferred from previously …
WebbThe breaking of mountain waves produces a body force known as orographic gravity wave drag (OGWD), which has been shown to play a vital role in shaping the general …
Webb1 juli 2013 · Abstract A version of the Canadian Middle Atmosphere Model (CMAM) that is nudged toward reanalysis data up to 1 hPa is used to examine the impacts of parameterized orographic and nonorographic gravity wave drag (OGWD and NGWD) on the zonal-mean circulation of the mesosphere during the extended northern winters of 2006 … reagen methanil yellowreagen brownWebb30 sep. 2024 · Numerical simulations are carried out using the Weather Research and Forecast (WRF) model to calculate explicitly the ratio of orographic gravity-wave drag (GWD) in the presence of a stable boundary layer (BL) to the inviscid drag in its absence, either obtained from inviscid WRF simulations or estimated using an analytical linear … reagen luff schoorlWebb1 feb. 2003 · 1. Introduction. The zonal-mean wind and temperature structure of the middle atmosphere arises largely from a balance between radiative driving and gravity wave drag (GWD; 1 e.g., Holton 1983).This balance requires gravity waves whose sources are both orographic and nonorographic. reagen eosinofilWebb27 mars 2024 · Gravity-wave drag is simulated as described by Alpert et al. (1988) . The parameterization includes determination of the momentum flux due to gravity waves at … reagen dawn williamsWebbThe GA6.1 physics components are a radiation scheme (Manners et al., 2012) with SÁNCHEZ ET AL . ... (1997) and the non-orographic gravity wave drag parametrization 137 in Orr et al. (2010). The moist convection scheme is based on the mass-flux approach of Tiedtke (1989), ... reagen kulseth attorney tucsonWebb27 mars 2024 · The NWP model gravity wave drag (GWD) scheme in the GFS has two main components: how the surface stress is computed, and then how that stress is … reagen parry