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CHASER: An innovative satellite mission concept to measure the effects of aerosols on clouds and climate

MPS-Authors
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Horváth,  Ákos
Observations and Process Studies, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

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Kinne,  Stefan
Observations and Process Studies, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

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Stevens,  Bjorn       
Director’s Research Group AES, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

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Fulltext (public)

BAMS-94-2013-615.pdf
(Publisher version), 9MB

Supplementary Material (public)

10.1175_bams-d-11-00239.2.pdf
(Supplementary material), 2MB

Citation

Rennó, N. O., Williams, E., Rosenfeld, D., Fischer, D. G., Fischer, J., Kremic, T., et al. (2013). CHASER: An innovative satellite mission concept to measure the effects of aerosols on clouds and climate. Bulletin of the American Meteorological Society, 94, 685-694. doi:10.1175/BAMS-D-11-00239.1.


Cite as: https://hdl.handle.net/11858/00-001M-0000-000E-BB6B-0
Abstract
The formation of cloud droplets on aerosol particles, technically known as the activation of cloud condensation nuclei (CCN), is the fundamental process driving the interactions of aerosols with clouds and precipitation. The Intergovernmental Panel on Climate Change (IPCC) and the Decadal Survey (NRC 2007) indicate that the uncertainty in how clouds adjust to aerosol perturbations dominates the uncertainty in the overall quantification of the radiative forcing attributable to human activities. Measurements by current satellites allow the determination of crude profiles of cloud particle size, but not of the activated CCN that seed them. The Clouds, Hazards, and Aerosols Survey for Earth Researchers (CHASER) mission concept responds to the IPCC and Decadal Survey concerns, utilizing a new technique and high-heritage instruments to measure all the quantities necessary to produce the first global survey maps of activated CCN and the properties of the clouds associated with them. CHASER also determines the activated CCN concentration and cloud thermodynamic forcing simultaneously, allowing the effects of each to be distinguished. Capsule CHASER proposes to revolutionize our understanding of the interactions of aerosols with clouds by making the first global survey of the fundamental physical entity linking them: activated cloud condensation nuclei.