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Author: Donald J. Varley Publisher: ISBN: Category : Atmospheric physics Languages : en Pages : 74
Book Description
This report describes particle spectra in thin cirrus clouds that were sampled on 18 March 1978 southwest of Albuquerque. The sampling aircraft, an MC-130E, flew near 31,000 ft (9.4 km) and acquired cloud particle data with its three PMS spectrometer probes. Ice crystals larger than 50 micrometer were recorded for only about 17 min, but smaller ones were measured by an axial scattering probe for several more minutes. Listings of particle concentration vs size, averaged over consecutive 30 sec intervals for 75 min, are included. (Author).
Author: Donald J. Varley Publisher: ISBN: Category : Atmospheric physics Languages : en Pages : 74
Book Description
This report describes particle spectra in thin cirrus clouds that were sampled on 18 March 1978 southwest of Albuquerque. The sampling aircraft, an MC-130E, flew near 31,000 ft (9.4 km) and acquired cloud particle data with its three PMS spectrometer probes. Ice crystals larger than 50 micrometer were recorded for only about 17 min, but smaller ones were measured by an axial scattering probe for several more minutes. Listings of particle concentration vs size, averaged over consecutive 30 sec intervals for 75 min, are included. (Author).
Author: Ian D. Cohen Publisher: ISBN: Category : Cirrus clouds Languages : en Pages : 0
Book Description
On 19 March 1978 an MC-130E aircraft obtained ice particle data in cirrus clouds near Albuquerque, N.M. Some data were also obtained from a high altostratus layer below the cirrus. Printouts of particle size and average number distribution for consecutive 30-sec periods during the flight are presented. Additionally, graphical displays of average particle spectra and 2-D particle examples are given for five 3- to 5-min periods when cloud conditions were relatively homogeneous. (Author)
Author: Donald J. Varley Publisher: ISBN: Category : Languages : en Pages : 91
Book Description
This is the fourth in a series of reports presenting particle distribution data acquired in cirrus clouds over the western U.S. The data herein were obtained 21 March 1978 by an instrumented MC-130E near Albuquerque, N.M. The area was under the influence of a slight upper level ridge, and the cirrus appeared related to jet stream winds. No significant surface weather was present at the time. Results include the following: (1) The largest particles measured were near 2500 micrometers, but there were only one or fewer of these per m3; (2) occasional particles as large as 1300 micrometers were recorded in what visually was cloud-free air; (3) few of the particles could be recognized in any known classification system but those most frequently recognized were bullet rosettes; (4) the PMS 2-D data revealed particle-type changes occurring in 5 sec or less of flight time; (5) a halo around the sun was periodically seen when mixed-type crystals containing bullet rosettes were recorded; (6) varying numbers of small particles (the difference between 1 to 28 micrometers) were recorded almost continually, even in clear air, while the aircraft was between 23,000 ft (7.0 km) and 27,300 ft (8.3 km) MSL; (7) computed ice water content values generally decreased with height and increased with temperature in the cirriform clouds sampled; (8) particle size spectra were seldom exponential for particles smaller than approximately 250 micrometers; and (9) bimodal peaks were frequent in the population distribution near 100 and 250 micrometers. (Author).
Author: Ian D. Cohen Publisher: ISBN: Category : Cirrus clouds Languages : en Pages : 86
Book Description
On 19 March 1978 an MC-130E aircraft obtained ice particle data in cirrus clouds near Albuquerque, N.M. Some data were also obtained from a high altostratus layer below the cirrus. Printouts of particle size and average number distribution for consecutive 30-sec periods during the flight are presented. Additionally, graphical displays of average particle spectra and 2-D particle examples are given for five 3- to 5-min periods when cloud conditions were relatively homogeneous. (Author).
Author: Ian D. Cohen Publisher: ISBN: Category : Languages : en Pages : 81
Book Description
On 19 March 1978 an MC-130E aircraft obtained ice particle data in cirrus clouds near Albuquerque, N.M. Some data were also obtained from a high altostratus layer below the cirrus. Printouts of particle size and average number distribution for consecutive 30-sec periods during the flight are presented. Additionally, graphical displays of average particle spectra and 2-D particle examples are given for five 3- to 5-min periods when cloud conditions were relatively homogeneous. (Author).
Author: Donald J. Varley Publisher: ISBN: Category : Cloud physics Languages : en Pages : 71
Book Description
This report describes particle spectra in thin cirrus clouds that were sampled on 18 March 1978 southwest of Albuquerque. The sampling aircraft, an MC-130E, flew near 31,000 ft (9.4 km) and acquired cloud particle data with its three PMS spectrometer probes. Ice crystals larger than 50 micrometer were recorded for only about 17 min, but smaller ones were measured by an axial scattering probe for several more minutes. Listings of particle concentration vs size, averaged over consecutive 30 sec intervals for 75 min, are included. (Author).
Author: Publisher: ISBN: Category : Languages : en Pages : 107
Book Description
The AFGL instrumented MC-130E sampled thin cirrus clouds on 3,4, and 5 February 1979. In some cases, there was no visible cirrus, but some particles were detected. During this period, the upper air pattern was dominated by southwest to northeast flow, while two surface systems moved from north to south. The first of these left thin cirrus in eastern New Mexico; the second pushed south to the Gulf of Mexico, leaving the cirrus studied on the previous two flights. Most of the particles observed were less than 100 microns. As a rule, the opacity of the cirrus seemed related more closely to the density of particles in the 20- to 200-micro range. On examination the form factor appeared to be higher (indicating more consistent sized particles) in cirrus of nonfrontal origin than in cirrus associated with strong surface weather systems. This report is the last in a series of cirrus particle distribution studies.
Author: Donald J. Varley
Author: Donald J. Varley
Author: Donald J. Varley
Author: Ian D. Cohen
Author: Donald J. Varley
Author: Ian D. Cohen
Author: Donald J. Varley
Author: Ian D. Cohen
Author: Donald J. Varley
Author: 
Author: D. J. Varley