MARC details
| 000 -LEADER |
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| fixed length control field |
03623nam a2200337Ia 4500 |
| 001 - CONTROL NUMBER |
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| control field |
ocm33182571 |
| 003 - CONTROL NUMBER IDENTIFIER |
|---|
| control field |
OCoLC |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20240918170328.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
950921s1995 coua b 000 0 eng d |
| 040 ## - CATALOGING SOURCE |
|---|
| Original cataloging agency |
CNR |
| Transcribing agency |
CNR |
| 049 ## - LOCAL HOLDINGS (OCLC) |
|---|
| Holding library |
CNRM |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
|---|
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
QC880.4.C64 |
| Local cutter number (OCLC) ; Book number/undivided call number, CALL (RLIN) |
W43 1995 |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Weckwerth, Tammy W. |
| 110 ## - MAIN ENTRY--CORPORATE NAME |
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| Corporate name or jurisdiction name as entry element |
National Center for Atmospheric Research (NCAR) |
| 245 12 - TITLE STATEMENT |
|---|
| Title |
A study of horizontal convective rolls occurring within clear-air convective boundary layers. |
| 264 ## - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
|---|
| Place of production, publication, distribution, manufacture |
Boulder, CO : |
| Name of producer, publisher, distributor, manufacturer |
National Center for Atmospheric Research (NCAR), |
| Date of production, publication, distribution, manufacture, or copyright notice |
1995. |
| 300 ## - PHYSICAL DESCRIPTION |
|---|
| Extent |
xxxii, 179 p. : |
| Other physical details |
ill. ; |
| Dimensions |
28 cm. |
| 336 ## - CONTENT TYPE |
|---|
| Content type term |
text |
| Content type code |
txt |
| Source |
rdacontent |
| 337 ## - MEDIA TYPE |
|---|
| Media type term |
unmediated |
| Media type code |
n |
| Source |
rdamedia |
| 338 ## - CARRIER TYPE |
|---|
| Carrier type term |
volume |
| Carrier type code |
nc |
| Source |
rdacarrier |
| 502 ## - DISSERTATION NOTE |
|---|
| Dissertation note |
Also issued as thesis (Ph. D.)--University of California, Los Angeles, 1995. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
|---|
| Bibliography, etc |
Includes bibliographical references (p. 168-179). |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Data from the Convection and Precipitation/Electrification (CaPE) project were combined with numerical simulations to examine horizontal convective rolls. Four primary topics were addressed: (i) the environmental conditions necessary for sustaining rolls, (ii) horizontal thermodynamic variability within the convective boundary layer (CBL) due to rolls, (iii) thunderstorm initiation by rolls and (iv) the cause of along-roll periodicities. Both observations and numerical model simulations suggested that a moderate surface heat flux and some vertical wind shear was necessary for roll existence. Unlike previous studies, however, it was shown that rolls occurred within very low shear conditions (~2times10 ^{-3} s^{-1 }. In addition, the low-level (i.e., ~200 m) shear seemed to be more important than the CBL shear in roll sustenance. The horizontal potential temperature variations caused by rolls were 0.5 K while mixing ratio variations of 1.5-2.5 g kg^{-1} were observed at all heights throughout the CBL. The observed cloud base heights, measured with photogrammetry, were produced from the highest moisture values which occurred within the roll updraft regions. Since the roll updrafts contained the moisture values which were most representative of cloud base, it is likely that measurements from within roll updrafts are most representative of the potential for deep convection. It was documented that thunderstorms were initiated by rolls in Florida. Detailed comparisons were made between the days on which thunderstorms were initiated by rolls to days on which rolls existed but did not produce thunderstorms. No apparent differences were identified between the two types of days in any of the parameters examined. Along-roll irregularities were often apparent along the cloud streets, as well as within the CBL motions. The observed periodicities within the CBL had the same wavelength along adjacent roll updraft regions and were continuous in the cross-roll direction. The most likely source of these features was found to be shearing instabilities. A significant amount of knowledge about rolls has been obtained from analyzing the CaPE dataset although many assumptions and simplifications were required. These restrictions of the CaPE dataset, as well as plans for a field project during the summer of 1995 chiefly designed to sample rolls and waves, are presented. |
| 610 ## - SUBJECT ADDED ENTRY--CORPORATE NAME |
|---|
| Corporate name or jurisdiction name as entry element |
National Center for Atmospheric Research (NCAR) |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Convection (Meteorology) |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Clear air turbulence. |
| 9 (RLIN) |
1516 |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Planetary boundary layer. |
| 9 (RLIN) |
861 |
| 710 ## - ADDED ENTRY--CORPORATE NAME |
|---|
| Corporate name or jurisdiction name as entry element |
National Center for Atmospheric Research (U.S.). |
| 830 ## - SERIES ADDED ENTRY--UNIFORM TITLE |
|---|
| Uniform title |
NCAR Cooperative Thesis ; |
| Volume number/sequential designation |
160 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
BOOK |
| Source of classification or shelving scheme |
Library of Congress Classification |
