Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Marvin H. Wilkening"'
Autor:
Marvin H. Wilkening, David E. Watkins
Publikováno v:
Health Physics. 31:139-145
Radon 222 concentrations in the air in Carlsbad Caverns have been measured at different times of year in order to define certain features of the natural circulation of the cave atmosphere and to estimate the internal radiation exposure to visitors an
Autor:
David J. Raymond, Marvin H. Wilkening
Publikováno v:
Journal of the Atmospheric Sciences. 37:2693-2706
Measurements of the structure of dry convection over an isolated mountain range heated by the sun are presented. Filter techniques are used to deduce those scales of motion of significance to the circulation. A two-scale process is observed in which
Autor:
Marvin H. Wilkening, David J. Raymond
Publikováno v:
Journal of the Atmospheric Sciences. 42:773-783
Apparent mass, moisture and energy sources associated with individual cumulus congestus and thunderstorm clouds are measured using an instrumented aircraft. The results for thunderstorms are similar to those obtained by other investigators. Cumulus c
Publikováno v:
Journal of Geophysical Research. 79:5025-5029
The effect of large-scale atmospheric pressure changes on the 222Rn flux across the soil-air interface is investigated. Field data collected during 1972 and 1973 show that pressure changes of 1–2% associated with the passage of frontal systems prod
Autor:
Marvin H. Wilkening, David J. Raymond
Publikováno v:
Journal of the Atmospheric Sciences. 39:2211-2228
Convection and cloud formation over mountains during weak winds and strong insolation were studied using an instrumented aircraft. Previous studies in cloudless situations had shown the existence of convergence over the mountain range at low levels,
Autor:
Marvin H. Wilkening
Publikováno v:
Journal of Geophysical Research. 64:521-526
Measurements of the radon-decay products in the atmosphere over a 6-year period have been made with a monitor which precipitates fine airborne particulate matter onto a moving metallic tape. A calibration of the apparatus showed that the mean value f
Autor:
Marvin H. Wilkening
Publikováno v:
Journal of Geophysical Research. 75:1733-1740
Radon 222 concentrations have been measured in a mountain environment to learn more about radon 222 distribution and to test its usefulness in the study of certain features of convective cloud systems over a mountain range. Theoretical considerations
Autor:
Niels Jonassen, Marvin H. Wilkening
Publikováno v:
Journal of Geophysical Research. 70:779-784
The correlation between polar conductivity and the concentration of atmospheric small ions with mobilities higher than 10−4 m2 v−1 sec−1 has been investigated by means of a Gerdien conductivity meter. The apparatus has been operated in Socorro
Autor:
Marvin H. Wilkening, John E. Hand
Publikováno v:
Journal of Geophysical Research. 65:3367-3370
A radon condenser utilizing a trap cooled by liquid oxygen has been used to measure the radon content of the atmosphere and of the soil gases escaping through the surface of the earth. The average atmospheric-radon concentration at ground level in th
Autor:
Marvin H. Wilkening, Niels Jonassen
Publikováno v:
Journal of Geophysical Research. 75:1745-1752
An ion collector suitable for use aboard an aircraft has been developed for the determination of the concentration of radon 222 daughter ions in the lower atmosphere. A transverse electric field in a concentric-cylinder geometry deposits positively c