Call number:
ZSP-202-52
In:
Research report / Cold Regions Research and Engineering Laboratory, 52
Description / Table of Contents:
Summary: The results of studies on the physical properties of fog whiteout, as it occurred at Site 2 on the Greenland Ice Cap in the summers of 1956 and 1957, are reported and compared with the results of other studies; the instruments, methods of measurement, and data-reduction techniques used are described; and attempts at dissipating whiteout by AgI (silver iodide) seeding are discussed briefly. Emphasis was given to measurements of fog-particle size distribution, liquid-water content, relative humidity, visibility, and atmospheric nuclei. The data are tabulated. The synoptic situations for 2 selected cases of fog whiteout at relative humidities of less than 100% (possibly because of the presence of salt solutions) are described; and the balance between the rate at which water is made available in the air as it is lifted over the Ice Cap and the rate of water flux to the snow surface is computed using various equations. Efforts at fog dispersal by AgI seeding from the ground were inconclusive.
Type of Medium:
Series available for loan
Pages:
iv, 18, A1 Seiten
,
Illustrationen
Series Statement:
Research report / Cold Regions Research and Engineering Laboratory 52
URL:
https://hdl.handle.net/11681/2728
Language:
English
Note:
CONTENTS
Preface
Summary
Introduction
Definition of whiteout
Scope of this study
Instrumentation and observations
Location of project:
Fog particle measurements
Atmospheric humidity measurements
Visibility measurements
Air temperature measurements
Radiation measurements
Atmospheric nuclei
Observations of fog whiteout
Conditions prior to onset of whiteout
Conditions at time of arrival and during whiteout
Micro-structure of fog whiteout
Analysis of moisture balance during two selected cases
Synoptic situation for case 1
Synoptic situation for case 2
Computations
Attempts at fog whiteout dispersal
References
Appendix A - Freezing nuclei observations
Appendix B - Absolute humidity gradient data
Location:
AWI Archive
Branch Library:
AWI Library
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