Cirrus cloud seeding: a climate engineering mechanism with reduced side effects?
نویسندگان
چکیده
منابع مشابه
Cirrus cloud seeding: a climate engineering mechanism with reduced side effects?
Climate engineering, the intentional alteration of Earth's climate, is a multifaceted and controversial topic. Numerous climate engineering mechanisms (CEMs) have been proposed, and the efficacies and potential undesired consequences of some of them have been studied in the safe environments of numerical models. Here, we present a global modelling study of a so far understudied CEM, namely the ...
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[1] Cirrus clouds, thin ice clouds in the upper troposphere, have a net warming effect on Earth’s climate. Consequently, a reduction in cirrus cloud amount or optical thickness would cool the climate. Recent research indicates that by seeding cirrus clouds with particles that promote ice nucleation, their lifetimes and coverage could be reduced. We have tested this hypothesis in a global climat...
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In addition to the new cirrus cloud scheme described in Sect. 2.2, a prognostic cloud droplet number concentration (nl) equation for liquid clouds is added in the version of CAM3 used in this study compared with the version used in Liu et al. (2007a). Together with the prognostic liquid water mass (ql), ice water mass (qi), and ice crystal number concentration (ni), the complete set of equation...
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The climatic effects of climate engineering—or geoengineering—via cirrus cloud thinning are examined. Thinner cirrus clouds can allowmore outgoing longwave radiation to escape to space, potentially cooling the climate. The cloud properties and climatic effects due to perturbing the ice crystal fall speed are investigated in a set of hemispheric scale sensitivity experiments with the Community E...
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A set of the inhomogeneity factor for high-level clouds derived from the ISCCP D1 dataset averaged over a five-year period has been incorporated in the UCLA atmospheric GCM to investigate the effect of cirrus cloud inhomogeneity on climate simulation. The inclusion of this inhomogeneous factor improves the global mean planetary albedo by about 4% simulated from the model. It also produces chang...
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ژورنال
عنوان ژورنال: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
سال: 2014
ISSN: 1364-503X,1471-2962
DOI: 10.1098/rsta.2014.0116