Table of Contents - The Atmospheric Studies Group at TRC
Share Embed Flag
Download ePaper

Table of Contents - The Atmospheric Studies Group at TRC

Table of Contents - The Atmospheric Studies Group at TRC Table of Contents - The Atmospheric Studies Group at TRC

src.com
29.01.2015 Views

Section 7: Prognostic Meteorological Interfaces 7.2 CALETA Preprocessor CALETA operates on the output from the National Centers for Environmental Prediction (NCEP) operational North American Mesoscale (NAM) model, formerly known as the Eta model, and the highresolution simulation products from the Weather Research and Forecasting (WRF) model. Eta/NAM/WRF model output files are produced for use by the Advanced Weather Interactive Processing System (AWIPS) in various AWIPS grids. Gridded model output is stored in GRIB format, and consists of analysis and forecast fields for multiple parameters and levels. CALETA extracts and reformats a subset of these fields, and creates a 3D.DAT file for CALMET (see section 7.5). Several datasets are available, corresponding to AWIPS grids that cover the United States at various spatial resolutions: AWIPS Grid 212 -- Continental U.S., 40km (NAM) AWIPS Grid 218 -- Continental U.S., 12km (NAM) AWIPS Grid 245 -- Eastern U.S., 8km (WRF) AWIPS Grid 246 -- Western U.S., 8km (WRF) AWIPS Grid 247 -- Central U.S., 8km (WRF) AWIPS Grid 248 -- Puerto Rico, 8km (WRF) AWIPS Grid 249 -- Alaska, 10km (WRF) AWIPS Grid 250 -- Hawaii, ~8km (WRF) Maps of these domains are reproduced in Figures 7-4 and 7-5. Due to large size of files, the AWIPS 218 domain is processed into 54 tiles shown in Figure 7-6. Characteristics of each of these AWIPS grid products are summarized in Table 7-10. For AWIPS 212, 218, and 245, the vertical resolution is 25 hPa from 1000 hPa to 50 hPa, for a total of 39 levels. Nine vertical levels are available (1000, 925, 850, 700, 600, 500, 400, 300 and to 200 hPa.) for the other AWIPS grids. The run frequency is four times per day for AWIPS 212 and 218, at initial hours of 00, 06, 12, and 18 UTC. It is once per day for AWIPS 245, 246, 247, and 249; and twice per day for AWIPS 248 and 250. The initial time is 00 UTC for Alaska (AWIPS 249), 06 UTC for the western US (AWIPS 246), 12 UTC for the central US (AWIPS 247), and 18 UTC for the eastern US (AWIPS 245). The initial time is 00, 12 UTC for Hawaii (AWIPS 250) and 06, 18UTC for Puerto Rico (AWIPS 248). 7-26

Section 7: Prognostic Meteorological Interfaces Figure 7-4: Domain coverage for AWIPS 212 and 218 grids. 7-27

Section 7: Prognostic Meteorological Interfaces<br />

Figure 7-4:<br />

Domain coverage for AWIPS 212 and 218 grids.<br />

7-27

logo

products

Resources

Company

Terms of service
Privacy policy
Cookie policy
Cookie settings
Imprint
Change language
Made with love in Switzerland
© 2024 Yumpu.com all rights reserved

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!