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COSP quicklooks
All output is calculated from the monthlymean for a single January of a model integration, and January 2008 from the observations. We show plots for the GA6 configuration of the UM (left), CESM 1.1.2 (centre), and observations (right).
Calculated from the joint histogram of cloud cover as a function of cloudtop pressure and optical thickness by summing over all CTPtau bins including the bins with tau smaller 0.3 bins (first column in the plots below). Instead of observations, the quantity is compared to the model's total cloud cover field as computed by the model itself without the use of the ISCCP simulator (bottom row in the plots below). This is the field usually called CLT in CMIP archives. The comparison plot displays the difference between ISCCP total cloud cover and its model CLT field.
Global areaweighted average from all points with valid data. Note that per standard practice, only points that are sunlit in the month will have data. Relative to observations, model plots have an extra optical thickness bin for tau less than 0.3.
Sum fractions over all height and reflectivity bins with reflectivity greater than 25 dBZ and divide by the number of height bins.
Areaweighted average from all tropical points. Tropical points are defined as 30S to 30N. Note that model plots have additional reflectivity bins for dBZ smaller than 25.
Calculated from the joint histogram of cloud cover as a function of cloudtop pressure and optical thickness by summing over all CTPtau bins with tau greater than 0.3 bins. Observational counterpoint is Cloud_Fraction_Mask_Total_Mean in CFMIPOBS dataset.
Global areaweighted average from all points with valid data. Note that per standard practice, only points that are sunlit in the month will have data. Relative to observations, model plots have an extra optical thickness bin for tau less than 0.3.
Time means are calculated as [clwmodis*reffclwmodis]/[clwmodis]. Square brackets denote time averages.
Time means are calculated as [climodis*reffclimodis]/[climodis]. Square brackets denote time averages.
Calculated from the joint histogram of cloud cover as a function of cloudtop height and optical thickness by summing over all CTHtau bins with tau > 0.3 bins.
Global areaweighted average from all points with valid data. Note that per standard practice, only points that are sunlit in the month will have data. Relative to observations, model plots have an extra optical thickness bin for tau less than 0.3.
Map of variable cltcalipso.
Global average of variable cfadLidarsr532.
 