Cloud drop effective radius

The cloud drop effective radius (alternatively cloud effective radius or effective radius) is a weighted mean of the size distribution of cloud droplets.[1] The term was defined in 1974 by James E. Hansen and Larry Travis as the ratio of the third to the second moment of a droplet size distribution to aid in the inversion of remotely sensed data.[2] Physically, it is an area weighted radius of the cloud drop particles.

Mathematically, this can be expressed as r_e = \dfrac{\int\limits_{r_1}^{r_2} \pi \cdot r^3 \cdot n(r)\,dr}{\int\limits_{r_1}^{r_2} \pi \cdot r^2 \cdot n(r)\,dr}.

See also

  • Liquid water content

References

  1. ^ "Cloud Effective Radius". Goddard Earth Sciences Data and Information Services Center. http://disc.sci.gsfc.nasa.gov/PIP/shtml/cloud_effective_radius.shtml. Retrieved 03 August 2009. [dead link]
  2. ^ Hansen., J.E and L.D. Travis (1974). "Light scattering in planetary atmospheres". Space Science Reviews (Springer Netherlands) 16 (4): 527–610. Bibcode 1974SSRv...16..527H. doi:10.1007/BF00168069. 



Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Hand grenade — M67 fragmentation grenade, a widely used modern hand grenade. A hand grenade is any small bomb that can be thrown by hand. Hand grenades are classified into three categories, explosive grenades, chemical and gas grenades.[1] Explosive grenades… …   Wikipedia

  • Snowdon Mountain Railway — Rheilffordd yr Wyddfa Half way up the Mountain Overview …   Wikipedia

  • radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …   Universalium

  • cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …   Universalium

  • Atomic nucleus — A figurative depiction of the helium 4 atom with the electron cloud in shades of gray. In the nucleus, the two protons and two neutrons are depicted in red and blue. This depiction shows the particles as separate, whereas in an actual helium atom …   Wikipedia

  • Supermarine Spitfire operational history — November 1942 photo of a very early Mk IXb of 306 (Polish) Toruński Squadron. Main article: Supermarine Spitfire The Supermarine Spitfire, the only British fighter to be manufactured before, during and after the Second World War, was designed as… …   Wikipedia

  • Star — For other uses, see Star (disambiguation) …   Wikipedia

  • Atom — The atom is the smallest unit of an element that retains the chemical properties of that element. An atom has an electron cloud consisting of negatively charged electrons surrounding a dense nucleus. The nucleus contains positively charged… …   Wikipedia

  • Atomic bombings of Hiroshima and Nagasaki — Part of the Pacific War, World War II …   Wikipedia

  • fluid mechanics — an applied science dealing with the basic principles of gaseous and liquid matter. Cf. fluid dynamics. [1940 45] * * * Study of the effects of forces and energy on liquids and gases. One branch of the field, hydrostatics, deals with fluids at… …   Universalium


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.