Sentences with phrase «cloud scheme»

Gregory, D., et al., 2000: Revision of convection, radiation and cloud schemes in the ECMWF Integrated Forecasting System.

Both Haywood and Ramaswamy (1998) and Penner et al. (1998b) acknowledge that their use of on / off cloud schemes where cloud fills an entire grid box once a threshold relative humidity is exceeded may lead to strong radiative forcings due to strong non-linear relative humidity effects.

In - depth analysis reveals that the model's shallow cumulus convection scheme tends to significantly under - produce clouds during the times when shallow cumuli exist in the observations, while the deep convective and stratiform cloud schemes significantly over-produce low - level clouds throughout the day.

With funding from DOE, NSF and MIT, AER scientists have collaborated to investigate the impact of the MIT convection and cloud scheme in the NCAR CAM climate model.

Chuang et al. (1997) use an on / off cloud scheme and report a radiative forcing lower than these two studies, but the hygroscopic growth is rather suppressed above a relative humidity of 90 %.

But in a given model you can often find ways of altering the model's climate sensitivity through the sub-grid convection and cloud schemes that affect cloud feedback, but you have to tread carefully because the cloud simulation exerts a powerful control on the atmospheric circulation, top - of - atmosphere (TOA) and surface radiative flux patterns, the tropical precipitation distribution, etc..

So if you want to test a change in something like the cloud scheme, that might affect the solar radiation that reaches the sea - ice in summer, you have to do so with a shorter run.

I used the Kiehl and Trenberth (1997) cloud scheme.