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LAPS Motivation

LAPS Motivation. High Resolution (500m – 20km), rapid update (10-60min) Highly portable system – about 150 users world wide Federal Gov ’ t – NWS, RSA, PADS, FAA, DHS State Gov ’ t – California Dept of Water Resoures International – Finnish Met. Inst., China Heavy Rain Inst.

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LAPS Motivation

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  1. LAPS Motivation • High Resolution (500m – 20km), rapid update (10-60min) • Highly portable system – about 150 users world wide • Federal Gov’t – NWS, RSA, PADS, FAA, DHS • State Gov’t – California Dept of Water Resoures • International – Finnish Met. Inst., China Heavy Rain Inst. • Global analysis – used by SOS • Wide variety • of data sources: 1

  2. LAPS Features • Modernization of traditional analysis to fully variational (var-LAPS) by a multigrid technique; • Hot-start with cloud, vertical velocity and other meteorological states reflecting latent heat and forcing; • Multiscale analysis; • Efficient analysis for frequent analysis cycles (currently running on a single processor with 15 minute cycle for CONUS domain). Hotstart with cloud/rain/snow Variational LAPS has higher ETS than persistence fcst. Xie et. al. 2011 MWR Briggs 1987 SIAM tutorial on multigrid

  3. LAPS USER BASE • Private Sector • Weather Decision Tech., Hydro Meteo, • Precision Wind, Vaisala, Telvent • International agencies (10+ countries) • KMA, CMA, CWB, Finland (FMI), Italy, Spain, • BoM (Australia), Canary Islands, HKO, • Greece, Serbia, Nanjing Inst. of Met. • NOAA • ~120 WFOs (via AWIPS), ARL, NESDIS • Other US Agencies • DHS, DoD, FAA, CA DWR, GA Air Qual. • Academia • Univ of HI, Athens, Arizona, CIRA, UND, McGill

  4. LAPS SCIENTIFIC IMPACT – REFEREED PAPERS • 30 refereed publications by GSD/NOAA • 1-2 refereed papers per year • 391 citations in refereed papers • ~ 40 / year recently

  5. LAPS SCIENTIFIC IMPACT – ALL PUBLICATIONS LAPS NOAA, local analysis and prediction system • Queryperiod: 1989 - 2012-10-11 • 432 Papers • 4163 Citations • Cites/year: 181.00 • Cites/paper: 9.64/0.0/0 (mean/median/mode) • Cites/author: 1975.61 • Papers/author: 221.50

  6. Future • Variational LAPS combines advantages from traditional LAPS and modern data assimilation techniques and reduces their limitations; • It applies all state of art DA and numerical techniques (such as multigrid, which is unique in the DA community) to build a next generation NOAA data assimilation system; • It will be better balanced or constrained in the new terrain-following and with fully variational cloud analysis; • Its multiscale, hot-start, high efficiency and portability will provide forecasters around the world an analysis system for various applications.

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