Head in a Cloud

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Entries Tagged as 'modeling'

“Growth of Cloud Droplets by Turbulent Collision–Coalescence”

April 16th, 2008 · No Comments

To help better explain the gap between theoretical and observed precipitation droplet growth times, Xue et al. attempted to quantify the effects of turbulent motions on collision and coalescence. In “Growth of Cloud Droplets by Turbulent Collision-Coalescence” from the February 2008 Journal of the Atmospheric Sciences, several different model parameterizations for collision kernels were compared [...]

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Tags: modeling · MTR3440

Effects of Absorbing Aerosols on Cloud Absorption and Forcing

March 25th, 2008 · No Comments

It would be assumed that in the exploration of the albedo and forcing ratios of pure clouds, one would attain values equal to 1.0. This being the case, how would an observer go about explaining an albedo ranging from .7 to .8 or a cloud forcing ratio consisting of 1.5? These two aberrations have been [...]

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Tags: aerosols · clouds · modeling · MTR3440 · Uncategorized

A Summary of “Effect of Dynamics on Mixed-Phase Cloud: Theoretical Considerations”- Korolev & Field

February 11th, 2008 · 2 Comments

Editor’s Note: The following is the first in a series of posts by undergraduate students in the course “Physical Meteorology: Atmospheric Radiation and Cloud Physics” that I am teaching at Metro State College of Denver. I hope you enjoy! -Sean Davis The following is a brief overview of the paper “The Effects of Dynamics on [...]

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Tags: modeling · MTR3440

Year 2100: Yup, Even Hotter!

September 27th, 2007 · 3 Comments

Editor’s note:  We are proud to begin presenting summaries of the presentations made at the weekly ATOC Journal Club.  Below is the first posting, by Jason English, based on a talk he gave yesterday.  We hope these postings will serve as a useful forum for post-Journal Club discussions.  Enjoy!  -Sean In July, Chen et. al. [...]

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Tags: aerosols · ATOC Journal Club · climate · global warming · modeling · troposphere

Background on Rethinking Organic Aerosols: Semivolatile Emissions and Photochemical Aging by Robinson et al.

April 2nd, 2007 · No Comments

Editor’s note: The following post was graciously contributed by Peter DeCarlo, a fellow Ph.D. candidate at the University of Colorado. His piece offers some background and commentary on the previous post.

Organic aerosols are studied in a variety of ways (field observations, lab studies, modeling, etc.) as most atmospheric constituents tend to be. With organic aerosols there have been considerable discrepancies in recent years between what is measured in the field, and what is modeled. Models assume a large fraction of the organic aerosol is primary based on early aerosol studies involving GC-MS (coupled gas chromatography and mass spectrometry). These studies found a significant portion of the resolvable aerosol to be primary…

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Tags: aerosols · field measurements · modeling · troposphere