Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 431504
Title Increasing CO2 suppresses boundary-layer clouds in temperate climates
Author(s) Vilà-Guerau de Arellano, J.; Heerwaarden, C.C. van; Lelieveld, J.
Source In: Proceedings of the 20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction, American Meteorological Society, 09-13 July 2012, Boston, USA. - American Meteorological Society - p. 12A.7 - 12A.7.
Event 20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction, Boston, 2012-07-09/2012-07-13
Department(s) Meteorology and Air Quality
WIMEK
Publication type Contribution in proceedings
Publication year 2012
Abstract Cumulus clouds in the atmospheric boundary layer play a key role in the hydrologic cycle, in the onset of severe weather by thunderstorms, and in modulating the Earth's reflectivity and climate. How these clouds respond to climate change, in particular over land, and how they interact with the carbon cycle is poorly understood. It is expected that as atmospheric CO2 concentrations rise, the effectiveness of photosynthesis by vegetation will increase. Since this is associated with reduced evapotranspiration, the sensible heat flux increases, which contributes to the surface temperature rise. Using a soil-water-atmosphere-plant model we show that increasing CO2 causes a reduction of boundary layer cloud formation in middle latitudes. This could be partly counteracted by a growth in biomass and greater ability of a warmer atmosphere to take up water. Model results are evaluated with a comprehensive observational data set taken at Cabauw (The Netherlands). We find that current climate conditions are optimal for boundary layer cloud formation over land, while in projections of future conditions, cloudiness will be increasingly suppressed. Our results emphasize the intricate connection between biological and physical aspects of the climate system.
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