Intercomparison among three sensors for ground-based measurement of DSD's are presented, the Joss-Waldvogel Distrometer (JWD), the Optical Spectro-Pluviometer (OSP), and the Precipitation Occurrence Sensor System (POSS). This is done in order to quantifying any systematic bias that can be identified in their measurements, and to evaluate a new data acquisition system developed for the JWD. / Data corresponding to stratiform, continental rain is analyzed, and a function (delta) is defined in order to provide a quantification of the relative differences between pairs of instruments. Significant differences in drop concentrations simultaneously measured by the instruments are found, being these about 100% at the extremes of the diameter spectra. Bulk rain quantities, rain rate (R) and reflectivity (Z), do not show significant biases in POSS and OSP, although the Z-R relationships present a strong dependence with the sensor and the method for obtaining them. / Analyzing an event of convective precipitation, it is concluded that neither POSS nor JWD can be used unattended without a criterion that filters observations during non-liquid precipitation. / A problem in the new data acquisition system for the MID is identified, and a future project for its calibration is proposed.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.20810 |
| Date | January 1998 |
| Creators | Campos, Edwin F. |
| Contributors | Zawadzki, Isztar (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Atmospheric and Oceanic Sciences.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001641653, proquestno: MQ44138, Theses scanned by UMI/ProQuest. |
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