Article
 

Upper-tropospheric relative humidity observation and implications for cirrus ice nucleation

Public Deposited

Contenu téléchargeable

Télécharger le fichier PDF
https://ir.library.oregonstate.edu/concern/articles/fq9780782

Descriptions

Attribute NameValues
Creator
Abstract
  • Relative humidity (RH) measurements acquired in orographic wave cloud and cirrus environments are used to investigate the temperature‐dependent RH required to nucleate ice crystals in the upper troposphere, RHnuc(T). High ice‐supersaturations in clear air—conducive to the maintenance of aircraft contrails yet below RHnuc and therefore insufficient for cirrus formation—are not uncommon. Earlier findings are supported that RHnuc in mid‐latitude, continental environments decreases from water‐saturation at temperatures above −39°C to 75% RH at −55°C. Uncertainty in determining RHnuc below −55°C results in part from size detection limitations of the microphysical instrumentation, but analysis of data from the SUCCESS experiment indicates that RHnuc below −55°C is between 70 and 88%. A small amount of data acquired off‐shore suggests the possibility that RHnuc may also depend on properties of the aerosols.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Heymsfield, A. J, Miloshevich, L. M., Twohy, C., Sachse, G. and Oltmans, S., 1998, Upper tropospheric relative humidity observations and implications for cirrus ice nucleation: Geophys. Res. ,v. 25, p. 1,343-1,346.
Journal Title
Journal Volume
  • 25
Journal Issue/Number
  • 9
Déclaration de droits
Publisher
Language
Replaces

Des relations

Parents:

This work has no parents.

Articles

La vignette Titre Date de téléchargement Visibilité actes
file details Heymsfield_et_al_GRL_1998.pdf 2017-12-06 Public Télécharger