(see AMIP I documentation)
(see AMIP I documentation)
(see AMIP I documentation)
(see AMIP I documentation)
(see AMIP I documentation)
(see AMIP I documentation)
Orographic smoothing via Gibbs filtering approach, Navarra et al., 1994 [45] (also see AMIP I documentation)
(see AMIP I documentation)
(see AMIP I documentation)
(see AMIP I documentation)
(see AMIP I documentation)
Diurnally varying, calculated every 2 hours.
(also see AMIP I documentation)
RAS (Relaxed Arakawa-Scubert) developed by Moorti and Suarez (1992) [42] is use to parameterize cumulus scale convection. A convective scheme after Manabe et al. (1965)[23] is used to parameterize large scale (stratiform) convection.
(also see AMIP I documentation)
A revised linear-regression scheme for better representation of marine stratocumulus cloud associated with temperature inversions in the boundary layer. As described in Gordon et. al. (2000) [46], the key distinguishing aspects of this regression scheme are: 1) the use of the temperature difference between ~850 hPa and the surface as the sole predictor, and 2) the use of ISCCP cloud data to derive the linear regression formula. The cloud formation scheme is otherwise the same as that used in the AMIP I model.
(see AMIP I documentation)
In contrast to the AMIP I model, Southern Hemisphere sea-ice leads are not represented.
(see AMIP I documentation)
The AMIP I model use of the Charnock (1955) relation for computing roughness lengths over oceans is modified in conditions of low wind speeds, following Godfrey and Beljaars (1991)[35]. The baseline model's constant roughness over land is replaced by Dorman and Sellers' (1989)[36] monthly varying roughness fields that depend on vegetation type. The effect of Southern Hemisphere sea-ice leads on roughness length also is omitted. Seasonally varying snow-free albedos by Matthews (1984)[37] replace those used over land in the AMIP I model. Albedoes of snow-covered surfaces are obtained from CLIMAP (1981)[38] data rather than by the algorithm of the baseline model.
(see AMIP I documentation)
Except special treatment of surface fluxes to account for the effects of Southern Hemisphere sea-ice leads is omitted owing to large imbalances in net heat flux.
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Last update October 15, 2002. For questions or comments, contact
Tom Phillips (phillips14@llnl.gov)
or the AMIP Model Representative.
UCRL-MI-135872