CAM3 and AM2 diagnostics
Change in Pacific low-levels clouds for 2xCO2 scenario: CAM3 and AM2 show different response.
Our goal: What determines cloud properties in various regions of the Pacific for the present day climate ?
Datasets and Regions
We look at a 12-month climatology of AMIP runs
(i.e. the models are forced with observed monthly mean SST and sea ice which change with time/years.)
|| , Years: 1979-99
|| , Resolution: T85
|| , Years: 1983-98
|| , Resolution: 2x2.5
We look at regions of subsidence with significant amount of low-level clouds.
We pick 3 regions based on observations:
North SubTropics, South SubTropics, and East equatorial.
The idea is to :
Characterize cloud properties in these regions.
Which large-scale quantities determine cloud properties ?
Contour plots - AM2, CAM3 and observations
Seasonal PDF - AM2, CAM3 versus observations
Scatter plots and joint PDFs