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Last modified
7/28/2009 2:35:13 PM
Creation date
4/15/2008 2:38:48 PM
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Weather Modification
Title
Weather Modification Programme - Catalogue of Data Sets for the International Cloud Modelling Workshop/Conference
Date
6/1/1984
Weather Modification - Doc Type
Report
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<br />4. SUMMARY OF AVAILABLE DATA <br /> <br />Only cases that have reasonably good initialization and verification data as <br />recommended at the Planning Session (Table 3) were selected as data sets for the <br />workshop. Not all data sets are complete with respect to the recommended para- <br />meters nor are they of equivalent quality. However, scientists involved in the <br />data reduction and analysis of the selected cases felt they were suitable for <br />the purposes of the workshop. <br /> <br />4.1 Data Type and Quality <br /> <br />Table 4 lists the type of data available for each data set and the relative data <br />quality for each parameter. A scale of 0 to 3 was used to rate data quality <br />with zero representing no data, 1 = poor, 2 = good, and 3 = excellent. The <br />total points for each case is an estimate of it's overall relative quality. <br />More information on the available data can be inferred from the case descrip- <br />tions given in section 3 and from the LOS (Lead Observational Scientist) whose <br />name, address, and telephone number are given in Table 5. Modelers are <br />encouraged to contact LOS's for additional information of a more analytic nature <br />on the open data sets. However, they should! restrict their contact with LOS's <br />on the closed data sets to clarifications of the initial conditions. <br /> <br />To the extent they are available, data descr'ibing the conditions (see Table 4) <br />during the predeve10pment and initiation stage of cloud formation will be pro- <br />vided for each case. Open data sets will also have verification information <br />(see Table 4) provided to improve model "tuning" and permit more extensive study <br />of model results with observations during the process. The "tuned" models can <br />then be run on closed data sets for similar cases as a more robust test of model <br />predictions. Closed data sets will be limited to initialization information <br />only prior to the workshop. Verification information for the closed data sets <br />will be revealed at the workshop. <br /> <br />Where seeding is part of a proposed data set, the seeding information will be <br />included in the initial conditions. <br /> <br />4.2 Data Format <br /> <br />Data format and medium of transmission to the modelers will be different for <br />each case and for each of the parameters of interest depending on the major <br />field research program from which they come. Some of the data may be on micro- <br />film, microfiche, digital magnetic tape or hard copy consisting of data tabula- <br />tions, graphic plots or data maps. The same data set, however mixed in format <br />and transmission medium, will be sent to all modelers who express an interest in <br />a given case for a model experiment. It is the modeler's responsibility to con- <br />vert this data into the specialized format required by the model code and by the <br />computer the model is run on. <br /> <br />Since each of the major field research programs that are supplying data sets <br />employed different observational systems and different data processing and <br />archiving systems, it is neither practical nor convenient to provide either <br />summaries or samples of all the data formats and transmission media. For most <br /> <br />24. <br />
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