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Digitale Medien

Reassessing the dependence of cloud condensation nucleus concentration on formation rate (1994)

Ackerman, Andrew S. ; Toon, Owen B. ; Hobbs, Peter V.

[s.l.] : Nature Publishing Group

Nature 367 (1994), S. 445-447

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Baker and Charlson2 (hereafter referred to as BC) suggested that the marine cloud-topped boundary layer is bistable with respect to CCN concentrations. When the production rate of CCN is low, the coalescence of droplets (which produces drizzle) maintains low CCN concentrations. Baker ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/367445a0

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Digitale Medien

Unrealistic desiccation of marine stratocumulus clouds by enhanced solar absorption (1996)

Ackerman, Andrew S. ; Toon, Owen B.

[s.l.] : Nature Publishing Group

Nature 380 (1996), S. 512-515

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Many models of the stratocumulus-topped marine boundary layer show that vertical mixing is driven by radiative cooling near the cloud top4"10. These models also show that absorption of solar radiation by clouds can lead to reduced boundary-layer mixing, which restricts the supply of water vapour ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/380512a0

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Remote Sensing, Vol. 5, Pages 6223-6240: Satellite Regional Cloud Climatology over the Great Lakes (2013)

Steven Ackerman; Andrew Heidinger; Michael Foster; Brent Maddux

MDPI Publishing

In: Remote Sensing

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Publikationsdatum: 2013-11-26

Beschreibung: Thirty-one years of imager data from polar orbiting satellites are composited to produce a satellite climate data set of cloud amount for the Great Lakes region. A trend analysis indicates a slight decreasing trend in cloud cover over the region during this time period. The trend is significant and largest (~2% per decade) over the water bodies. A strong seasonal cycle of cloud cover is observed over both land and water surfaces. Winter cloud amounts are greater over the water bodies than land due to heat and moisture flux into the atmosphere. Late spring through early autumn cloud amounts are lower over the water bodies than land due to stabilization of the boundary layer by relatively cooler lake waters. The influence of the lakes on cloud cover also extends beyond their shores, affecting cloud cover and properties far down wind. Cloud amount composited by wind direction demonstrate that the increasing cloud amounts downwind of the lakes is greatest during autumn and winter. Cold air flows over relatively warm lakes in autumn and winter generate wind parallel convective cloud bands. The cloud properties of these wind parallel cloud bands over the lakes during winter are presented.

Digitale ISSN: 2072-4292

Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie

Publiziert von MDPI Publishing

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