Multiyear Doppler Wind Lidar EXperiment to assess instrument

Multi-year Doppler Wind Lidar EXperiment to assess instrument performance in a wide variety of atmospheric conditions B. Gentry 1, B. Demoz 2, D. Venable 2, G. Koch 3, U. Singh 3 1 NASA/GSFC 2 Howard University 3 NASA/La. RC Working Group on Space-based Lidar Winds July 8 -11, 2008 Wintergreen, VA Acknowledgements: Dr Ramesh Kakar, NASA HQ

Outline: n HU-Beltsville Research Campus (HU-BRC): n n n Wind Experiment Proposed Goals Instrument platforms Major collaborations at the site: n n Location and over arching goals Instrumentation leveraging and transfer Preliminary work and collaborations

Uniqueness of Site • • • Semi-urban site Major Pollution corridor Integrate Science and Education Extensive instrumentation Extensive collaboration with other agency • A GRUAN nominated site MDE UMBCrt an r Dulles Airport Sterling (NWS) PSU HU-Beltsville Research Campus (HU-BRC): o p s r o rid r co T HU n it o Beltsville lu l UMD o P NASA/GSFC or BWI Airport aj M UM D W National Airport al lo ps

Aerial View of Site Office/Shops/Labs Latitude: +39º 03’ 15. 117’’ Longitude: -76º 52’ 39. 448’’ Elevation: 53. 2 m MDE Profiler C-Band Radar Full Air Quality 31 Met Tower Radiation Bldg GPS (X 2) Ceilometer MWR All Sky 8 -levels T/RH Raman ALVIS/AT STROZ GLOW Flux, Net rad Soil Moisture Chemistry PDB RSOS CORS Lidar Laboratory

Opportunities for Federal/State collaborations n NASA/GSFC: focus is satellite and/or research that will lead to global scales and climatic impacts. Ø Wind, n NWS Ø Ø Ø water vapor, Ozone, Temperature, aerosol (and soon Precipitation) – Sterling/Silver Spring: upper air instrumentation tested Assess different sonde package performance Assess ceilometer performance (cloud boundaries) Development of the consensus reference concept and student mentoring n NOAA/EPA: Ø will forecast aerosol/Ozone. Model PBL/Flux verification n Maryland Department of Environment Ø Collaborative pollution and state variable monitoring Ø Summer Ozone sonde launches

Wind Lidar Experiment: Goals n Develop understanding of direct detection (GLOW) Doppler lidar wind performance for various aerosol loading conditions (pollution, cirrus) n Develop a data base archive for wind measurements for the different seasons. n Participate in the intercomparison of coherent and direct detection Doppler lidars n Compare Doppler lidar wind data to other sensors: current or planned sensors (Profiler, Radio sounding, AMDAR). n Hands-on student training of students

Instruments for Wind Experiment: Wind Goddard Lidar observatory for Winds (GLOW) GLOW mobile Doppler lidar Wavelength Telescope/Scanner Aperture Laser Linewidth (FWHH) Laser Energy/Pulse Repetition Rate Etalon FSR Etalon FWHH PMT Quantum Efficiency 355 nm 0. 45 m 80 MHz 10 -40 m. J 50 pps 12 GHz 1. 7 GHz 20% m/s deg Double-edge filters sample wings of molecular spectrum to measure Doppler shift Time series of wind speed and direction profiles from IHOP_2002

Instruments for Wind Experiment: Wind Goddard Lidar observatory for Winds (GLOW) GLOW mobile Doppler lidar Double-edge filters sample wings of molecular spectrum to measure Doppler shift Wavelength Telescope/Scanner Aperture Laser Linewidth (FWHH) Laser Energy/Pulse Repetition Rate Etalon FSR Etalon FWHH PMT Quantum Efficiency 355 nm 0. 45 m 80 MHz 10 -40 m. J 50 pps 12 GHz 1. 7 GHz 20% Tropospheric wind speed and direction profile comparisons. GLOW lidar vs sonde.

Instruments for Wind Experiment: Wind -Validation Lidar - VALIDAR La. RC

Instruments for Wind Experiment: Aerosol loading - Howard University Raman Lidar (HURL) Raman Lidar - ND: YAG – 355 nm - Day/night operation - Water vapor - Aerosol backscattering - All weather operation - Extensive operation with GSFC lidars

Extensive upper air sonde capabilities: WAVES as example Extensive Radiosonde, Lidar & Satellite Studies • MDE Code red days air quality monitoring • NWS Consensus Reference Activities • NASA Satellite Validation Activities • Lidar Collaboration with (NDACC) at TMF/JPL • Precision surface pressure data • Education, Training, and Networking WAter Vapor Experiment – Sondes/Satellites - WA Payloads flown 1. Vaisala: RS 92, 90, 80 2. Sippican: MII-A, LMS 6 3. Snow White 4. CFH 5. Intermet 6. Modem 7. ATM 8. ECC/Ozone http: //ecotronics. com/lidar-misc/WAVES. htm

Instruments for Wind Experiment: Wind MDE- 915 MHz profiler Radio Acoustic Sounding System (RASS) Data Example of a Weak Frontal Passage Aerosol from lidar and wind from • Continuous RASS/Profiler Operation profiler • Associated chemistry • 10 m tower • Data available over the web in semi real time • 3 -4 km reach depending on aerosol load

Example: Lidar profiler Synergy Case: Low Level Jet • Shear in direction/speed • Chemical transport • Night time phenom • Good test for DWL

Instruments for Wind Experiment ACARS-AMDAR** : data available via web (FSL) Ideal location for wind lidar comparison with AMDAR BWI Airport Example: AMDAR performance data from Moninger et al, 2007. Dulles Airport National Airport ** ACARS - Aircraft Communications Addressing and Reporting System network AMDAR - Aircraft Meteorological Data Reports

Instruments for Wind Experiment NWS upper air data: developing statistics at IAD Completed: Characterization of the regional synoptic flow from 19 èEstablish boundaries of wind direction and speed. èUse to characterize GLOW/VALIDAR performancs

DWL Experiment design : 1) Surface + Tower + Profiler + Sonde Full Trop. Wind 2) HURL Aerosol loading 3) 1 + 2 GLOW/VALIDAR characterization! Methods: 1) Case studies 2) Statistical analysis 3) inter-instrument comparisons Training: 1) A graduate student is working on theory/operation of GLOW 2) Looking for a student to work on analysis/ meteorology/data integration