Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

VARIATIONS IN ATMOSPHERIC WATER VAPOR: BASELINE RESULTS FROM SMITHSONIAN OBSERVATIONS

ROBERT G. ROOSEN and RONALD J. ANGIONE
Publications of the Astronomical Society of the Pacific
Vol. 89, No. 532 (December 1977), pp. 814-822
Stable URL: http://www.jstor.org/stable/40677169
Page Count: 9
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
VARIATIONS IN ATMOSPHERIC WATER VAPOR: BASELINE RESULTS FROM SMITHSONIAN OBSERVATIONS
Preview not available

Abstract

Analysis is made of midmorning measurements of absolute humidity at ground level, and spectroscopie determinations of total atmospheric precipitable water vapor above the field stations of the Astrophysical Observatory of the Smithsonian Institution (APO). The APO data used in this study cover the period 1912-52 and nine mountain sites (altitudes 1500 m-2711 m) in North and South America and Africa. Reported values for over 3000 days are used. Large seasonal variations are apparent, with the maximum amounts of precipitable water vapor occurring very close to midsummer at all sites. Substantial longer-term variations are also present. The observed mean amounts of precipitable water vapor for various APO sites show reasonable agreement with Kuiper's generalized predictions. Study of the relation between precipitable water vapor and surface humidity shows a strong positive correlation, but the variance is so large that surface humidity is not a reliable indicator of precipitable water vapor for any particular day.

Page Thumbnails

  • Thumbnail: Page 
814
    814
  • Thumbnail: Page 
815
    815
  • Thumbnail: Page 
816
    816
  • Thumbnail: Page 
817
    817
  • Thumbnail: Page 
818
    818
  • Thumbnail: Page 
819
    819
  • Thumbnail: Page 
820
    820
  • Thumbnail: Page 
821
    821
  • Thumbnail: Page 
822
    822