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IHOP_2002 AERI INSTRUMENT SUMMARY. IHOP Spring Science Workshop University of Wisconsin – Madison SSEC/CIMSS W. Feltz, R. Tanamachi, D. Posselt, T. Achtor and J. Mecikalski. IHOP AERI Retrieval Update. Retrieval Description Preliminary Validation Case Studies (Homestead)
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IHOP_2002 AERI INSTRUMENT SUMMARY IHOP Spring Science Workshop University of Wisconsin – Madison SSEC/CIMSS W. Feltz, R. Tanamachi, D. Posselt, T. Achtor and J. Mecikalski
IHOP AERI Retrieval Update • Retrieval Description • Preliminary Validation • Case Studies (Homestead) • 12 June 2002 Water Vapor Oscillation • 22 May 2002 Dryline • Summary
AERIplus Retrieval Description • First guess uses 20 km RUC NWP hourly analysis above 2 km • Surface moisture, ceilometer cloud base height, and PBL regression first guess using AERI radiances below 3 km combined as a priori input with RUC (Description in JAM paper Feltz et al. 2003) • Current temporal resolution ten minutes, vertical resolution improved in lowest kilometer from 100 m to 50 m (temporal resolution should be averaged to hourly continuous forcing data set) at five AERI DOE ARM SGP sites and Homestead site (just reprocessed) • Not available during precipitation, fog, or through/above clouds
AERIplus and Radiosonde Comparisons Hillsboro 3 June 0230 UTC Vici Lamont Morris Purcell
AERI West – East AERI water vapor cross sections for IHOP
12 June 2002 Water Vapor Oscillation Total Precipitable Water 20 km RUC Analysis
Summary • All AERI data recently reprocessed for six sites (DOE ARM and Homestead, will update JOSS archive • >10 minute temporal resolution temperature and water vapor, preliminary analysis indicates the AERIplus retrievals provide • AERI Instrument Collection rate of 98% during IHOP, AERI retrievals were possible with ~60% of radiances, however this increases to 80% when providing a retrieval within a one hour time bin • Validation is ongoing and collaborations on several case studies are in progress • AERI References/Data Available at: http://cimss.ssec.wisc.edu/ihop/
AERI Retrieval Collaborations • MM5 Data Assimilation (Couvreux and Weckwerth) • Stability Field Summaries (Roberts) • 22 May 2002 Homestead Dryline (Demoz) • 4 June and 20 June Bore Events (Koch and Flamant) • 12 June 2002 – Water vapor oscillation and CI event (Mecikalski, Posselt, Smith)
References Feltz, W. F., H. B. Howell, R. O. Knuteson, H. M. Woolf, and H E. Revercomb, 2003: Near Continuous Profiling of Temperature, Moisture, and Atmospheric Stability using the Atmospheric Emitted Radiance Interferometer (AERI). . J. Appl. Meteor., In Press. Feltz, W. F. and J. R. Mecikalski, 2002: Monitoring High Temporal Resolution Convective Stability Indices Using the Ground-based Atmospheric Emitted Radiance Interferometer (AERI) During the 3 May 1999 Oklahoma/Kansas Tornado Outbreak. Wea. Forecasting, 17, 445-455. Turner, D. D., W. F. Feltz, and R. A. Ferrare, 2000: Continuous Water Profiles from Operational Ground-based Active and Passive Remote Sensors. Bull. Amer. Meteor. Soc., 81, 1301-1317 . Feltz, W. F., W. L. Smith, R. O. Knuteson, H. E. Revercomb, H. M. Woolf, and H. B. Howell, 1998: Meteorological Applications of Temperature and Water Vapor Retrievals from the Ground-Based Atmospheric Emitted Radiance Interferometer (AERI). J. Appl. Meteor., 37, 857-875 Smith, W. L., W. F. Feltz, R. O. Knuteson, H. E. Revercomb, H. B. Howell, and H. M. Woolf, 1999: The Retrieval of Planetary Boundary Layer Structure using Ground-based infrared spectral radiance measurements. J. Atmos. Oceanic Technol., 16, 323-333