Sentences with phrase «cloud fraction»

The observed cloud fraction for this case was 1.0.

This study therefore suggests the rapid response to CO2 forcing is (apart from a possible small negative response from LW water vapour) essentially confined to cloud fraction changes affecting SW radiation, and further that significant feedbacks with temperature occur in all cloud components (including this one), and indeed in all other classically understood «feedbacks».

Part of this sensitivity is attributed to a physically realistic positive radiative feedback, whereby a propensity toward higher cloud fractions in any given simulation is amplified by longwave radiative cooling.

Figure 1: Time series of cloud fraction for each of the experiments.

This implies that the CRF levels must have systematically decreased over time, causing a long - term decrease in the low cloud fraction and hence a long - term reduction in the planetary albedo, that again would be responsible for the warming.

«A comparison of multiscale variations of decade - long cloud fractions from six different platforms over the Southern Great Plains in the United States.»

But scientists working to understand the complex warming and cooling effects of direct and reflected sunlight need a more exact approach because measuring cloud fraction, or how much of the sky is covered by clouds, is an important piece of that story.

Furthermore, unlike many previous solar - climate studies that report cloud fraction MISR measures albedo, which has clearer climatological relevance.

The pattern of SW cloud fraction response to SST changes differs quite markedly to this, with large positive radiation responses originating in the upper troposphere, positive contributions in the lowest levels and patterns of positive / negative contributions in mid latitude low levels.

effects of aerosols on cloud properties (including cloud fraction, cloud microphysical parameters, and precipitation efficiency), which may modify the hydrological cycle without significant radiative impacts;

LES - predicted cloud fractions are shown below, along with results from the Stevens et al. (2005) intercomparison.

Air Temperature, Cloud Top Pressure, Cloud Top Temperature, Effective Cloud Fraction, Emissivity, Geostrophic Drag Coefficient

The large rapid SW cloud response is related to cloud fraction changes — and not optical properties — resulting from small cloud decreases ranging from the tropical mid troposphere to the mid latitude lower troposphere, in turn associated with decreased lower tropospheric RH.

Cloud fraction from the shortwave flux analysis VAP is used to identify and flag cases with cloud fraction less than 0.9.

«A 19 - month record of marine aerosol - cloud - radiation properties derived from DOE ARM AMF deployment at the Azores: Part I: Cloud fraction and single - layered MBL cloud properties.»

Cloud fraction is used to calculate downwelling shortwave radiation...

Daily mean NCEP / NCAR reanalysis data are used as atmospheric forcing, i.e., 10 - m surface winds, 2 - m surface air temperature (SAT), specific humidity, precipitation, evaporation, downwelling longwave radiation, sea level pressure, and cloud fraction.

Aerosol heating within cloud layers reduces cloud fractions, whereas aerosol heating above the cloud layer tends to increase cloud fractions.

Smith, S.A., and A.D. Del Genio, 2002: A simple conceptual model of cirrus horizontal inhomogeneity and cloud fraction.

The results were striking: across the intercomparison the cloud fraction was found to vary by a factor of almost five and the amount of liquid water in the clouds by nearly a factor of twelve, with the simulations having the highest cloud fraction and liquid water agreeing most closely with the observations.