NDLI: Trade-wind cloudiness and climate

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Trade-wind cloudiness and climate

Content Provider	NASA Technical Reports Server (NTRS)
Author	Randall, David A.
Copyright Year	1997
Description	Closed Mesoscale Cellular Convection (MCC) consists of mesoscale cloud patches separated by narrow clear regions. Strong radiative cooling occurs at the cloud top. A dry two-dimensional Bousinesq model is used to study the effects of cloud-top cooling on convection. Wide updrafts and narrow downdrafts are used to indicate the asymmetric circulations associated with the mesoscale cloud patches. Based on the numerical results, a conceptual model was constructed to suggest a mechanism for the formation of closed MCC over cool ocean surfaces. A new method to estimate the radioative and evaporative cooling in the entrainment layer of a stratocumulus-topped boundary layer has been developed. The method was applied to a set of Large-Eddy Simulation (LES) results and to a set of tethered-balloon data obtained during FIRE. We developed a statocumulus-capped marine mixed layer model which includes a parameterization of drizzle based on the use of a predicted Cloud Condensation Nuclei (CCN) number concentration. We have developed, implemented, and tested a very elaborate new stratiform cloudiness parameterization for use in GCMs. Finally, we have developed a new, mechanistic parameterization of the effects of cloud-top cooling on the entrainment rate.
File Size	265345
Page Count	7
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19980200853
Archival Resource Key	ark:/13960/t9g49n29h
Language	English
Publisher Date	1997-01-01
Access Restriction	Open
Subject Keyword	Meteorology And Climatology Climate Condensation Nuclei Tethered Balloons Two Dimensional Models Evaporative Cooling Stratocumulus Clouds Ocean Surface Parameterization Convection Vertical Air Currents Cloud Cover Large Eddy Simulation Entrainment Mesoscale Phenomena Wind Meteorology Boundary Layers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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