Detailed knowledge of light interactions between the atmosphere and vegetation, and within vegetation are of particular interest for terrestrial carbon cycle studies and optical remote sensing. This study describes a model for 3-D canopy radiative transfer that is directly coupled with an atmospheric radiative transfer model (Forest Light Environmental Simulator, FLiES). The model was developed...

[1] A one‐dimensional representation of the atmospheric boundary layer (ABL) depth is coupled to a soil moisture bucket model to dynamically explore the relative roles of surface and free atmospheric conditions on convective precipitation occurrence and resulting soil moisture states. This occurrence is taken to depend on the crossing of the ABL height and the lifting condensation level in the ...

The response of atmospheric CO2 and climate to the reconstructed variability in solar irradiance and radiative forcing by volcanoes over the last millennium is examined by applying a coupled physical-biogeochemical climate model that includes the Lund-Potsdam-Jena dynamic global vegetation model (LPJ-DGVM) and a simplified analogue of a coupled atmosphere-ocean general circulation model. The mo...

The atmospheric state simulated by the National Center for Atmospheric Research (NCAR) Community Climate Model, version 3 (CCM3), is compared to that simulated by the NCAR Climate System Model, version 1 (CSM1). CCM3 is an atmospheric general circulation model that uses specified sea surface temperatures (SSTs) for a lower boundary condition. Observed monthly mean SSTs for 1979–93 were used in ...

Ocean{atmosphere interaction plays a key role in climate uctuations on interdecadal timescales. In this study, diierent aspects of this interaction are investigated using an idealized ocean{atmosphere model, and a hierarchy of uncoupled and stochastic models derived from it. The atmospheric component is an eddy-resolving two-level global primitive equation model with simpliied physical paramete...

This paper presents a conceptual modeling study on the behaviors of terrestrial biosphere–atmosphere systems as they relate to multiple equilibrium states and climate variability, and emphasizes their implications for physically based climate modeling. The conceptual biosphere–atmosphere model consists of equilibrium responses of vegetation and precipitation to each other, dynamics of the veget...

The atmospheric energy transport variability associated with decadal sea surface temperature variability in the tropical Pacific is studied using an atmospheric primitive equation model coupled to a slab mixed layer. The decadal variability is prescribed as an anomalous surface heat flux that represents the reduced ocean heat transport in the tropical Pacific when it is anomalously warm. The at...

Volcano impacts on climate and biogeochemistry in a coupled carbon-climate model D. Rothenberg, N. Mahowald, K. Lindsay, S. C. Doney, J. K. Moore, and P. Thornton Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY 14853, USA Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO 80305, USA Department of Marine Chemistry and Geochemi...

The El Ni~ no–La Ni~ na asymmetry is evaluated in 14 coupled models from phase 5 of the Coupled Model Intercomparison Project (CMIP5). The results show that an underestimate of ENSO asymmetry, a common problem noted in CMIP3 models, remains a common problem in CMIP5 coupled models. The weaker ENSO asymmetry in the models primarily results from a weaker SST warm anomaly over the eastern Pacific ...

In PILPS off-line experiments, quite large discrepancies have been identified among the land-surface schemes in terms of the partitioning of available energy into sensible and latent heat fluxes and the partitioning of precipitation into evaporation and runoff plus drainage. In order to determine whether the extent of such differences found in off-line experiments is replicated in coupled exper...