Predicting cloud droplet number concentration in Community Atmosphere Model (CAM)-Oslo

Predicting cloud droplet number concentration in Community Atmosphere Model (CAM)-Oslo

[1] A new framework for calculating cloud droplet number, including a continuity equation for cloud droplet number concentration, has been developed and implemented in an extended version of the National Center for Atmospheric Research (NCAR) Community Atmosphere Model version 2.0.1 (CAM-2.0.1). The new continuity equation for cloud droplet number concentration consists of a nucleation term and...

Aerosol-cloud-climate interactions in the climate model CAM-Oslo

A new aerosol module is integrated on-line in the atmospheric GCM CAM-Oslo coupled to a slab ocean for equilibrium climate response studies. The response to an anthropogenic change in aerosols since pre-industrial times is compared with that of a future 63% increased CO2 level. The aerosol module calculates concentrations of sea-salt, mineral dust, sulphate, black carbon (BC) and particulate or...

Efficient Parallel I/O in Community Atmosphere Model (CAM)

2 Abstract Century-long global climate simulations at high resolutions generate large amounts of data in a parallel architecture. Currently, Community Atmosphere Model (CAM), the atmospheric component of the NCAR Community Climate System Model (CCSM), uses sequential I/O which causes a serious bottleneck for these simulations. We describe the parallel I/O development of CAM in this paper. The p...

Aerosol-cloud Interactions in MODIS and CAM-Oslo

Combined observational and modeling based study of the aerosol indirect effect T. Storelvmo, J. E. Kristjansson, G. Myhre, M. Johnsrud, and F. Stordal Department of Geosciences, University of Oslo, Oslo, Norway Norwegian Institute for Air Research, Kjeller, Norway Received: 16 January 2006 – Accepted: 21 February 2006 – Published: 11 May 2006 Correspondence to: T. Storelvmo (trude.storelvmo@geo...

Description of the NCAR Community Atmosphere Model ( CAM 4 . 0 )