Abstract
AbstractThe current generation of state‐of‐the‐art global climate models are being run at increasingly higher horizontal resolutions, with the goal of resolving organised deep convection explicitly. How a kilometre‐scale resolution impacts the representation of the atmospheric boundary layer is, however, not well known. Using statistical analysis on global fields as well as high‐frequency data at selected locations, produced with the Integrated Forecasting System (IFS) model for the Next Generation Earth‐system Models (nextGEMS) project, we investigate the horizontal resolution dependence of some boundary‐layer processes. We find that a change in resolution from 9 to 2.8 km causes no substantial changes to boundary‐layer properties and processes at most of the locations studied, although some global changes are detected that indicate circulation changes. Small changes to the boundary‐layer depth and structure are found in the Tropics. The short simulation length and lack of data for optimal boundary‐layer analysis limits the conclusions, especially in relation to the connection between the boundary layer and the atmosphere general circulation.
Published Version
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