Overview The path to Skywatch Video tour of the facility Brief rooftop instrument overview Description of real-time and.

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Presentation transcript:

Overview The path to Skywatch Video tour of the facility Brief rooftop instrument overview Description of real-time and archived data available on skywatch.colorado.edu Specific cases Future

History of Skywatch facility Department chair requests support from the Dean’s Fund for Renovations – September 2005 Upgrade our office space for suitable use as a classroom/laboratory teaching facility in atmospheric science. Design and construction started January 2006 and completed January 2007

From PAOS office to laboratory/classroom

Occupying the space ATOC support Folding tables & chairs Audio and video system Basic laboratory supplies Standard weather sensors for instrumentation class Computers & software Data acquisition systems Outside instrumentation platform Color printer and map board for forecasting class

Additional support necessary Current faculty recognizes the need for a funding source beyond the ATOC department High quality environmental sensors come at a high price Proposals written to NSF Geosciences Education Focus on improving the quality and effectiveness of geoscience education at all educational levels. Course, Curriculum, and Laboratory Improvement program proves to be a better fit. Two year award received in January 2009

Skywatch facility tour

Rooftop Instruments ATOC weather station Laser optical disdrometer Micro rain radar Total precipitation gauge Pyranometer Pyrgeometer Ceilometer Sun photometer Solar Spectral Flux Radiometer Ozone monitor Web camera

ATOC weather station Temperature ( +/- 0.5 °C) Humidity Barometric pressure Wind speed and direction Solar radiation Rain amount Maintained by faculty member Davis Vantage Pro2

Laser Optical Disdrometer Laser diode beam 1 mm x 30 mm x 180 mm Simultaneous measurement of hydrometeor diameter and velocity PAR-SI-VEL Derives accumulated rainfall, equivalent radar reflectivity (dBZ), and rainfall rate Size range 0.2 to 25 mm Fall velocity range.2 to 20 m/s OTT Parsivel

Micro Rain Radar Zenith pointing radar 24.1Ghz, or λ = 1.2 cm, or K band Vertical profiles of radar reflectivity, fall velocity, rain rate, and liquid water content Drop size distribution Monitoring of the melting layer Compare with in-situ disdrometer Metek MRR- 2

Ceilometer Measurement- height of cloud base Multiple layers possible if optically thin Zenith pointing pulsed diode laser 0.91µm Backscatter profile range 0 to 7.5 km at 10 m resolution, every 16 seconds Currently testing for measuring mixing layer height and aerosol concentration Vaisala Ceilometer CL31

Sun Photometer Measures direct solar radiation spectrum Wavelength range 0.35 to µm Grating and 1024 Si CCD array 2° field of view Solar tracker with active Sun location sensor Kipp and Zonen PGS-100 (Prede)

Air Quality Ozone monitoring Retired EPA instrument refurbished and calibrated Measurement in parts per billion (PPB) Thermo Environmental Instrument Model 49

Pyranometer Measurement - downwelling solar radiation Wavelength range from 0.31 µm to 2.8 µm Whole hemisphere field of view Response time < 18 s Calibrated in Watts / m 2 Kipp & Zonen CMP 3

Pyrgeometer Measurement - downwelling infrared radiation Wavelength range from 4.5  m to 42  m Response time < 18 s 150° hemispheric field of view Silicon window Sebastian Schimdt calibrated for us using a CG4 in Watts / m 2 Kipp & Zonen CGR 3

Solar Spectral Flux Radiometer One scanning sky radiance light collector One fixed hemispheric light collector 0.35 to 2.15 µm spectral range 8-12 nm spectral resolution Sampling resolution ~ 3 nm Si and InGaAs Zeiss spectrometers Solar Spectral Flux Radiometer – donated

Total Precipitation Gauge Accumulated precipitation Measures the weight of the fluid column above a load transducer Sampling interval 1 minute Accuracy = +/- 0.25mm NOAH II from ETI Instrument Systems Inc.

Student instrumentation Collaborator- Infrared Cloud Thermometer Compare with ceilometer For use in a NOAA Global Monitoring Division automated lidar system

Accessible through: Two Formats: Graphical Data Ascii File Can be read through Excel and IDL Archived Current Data Products

Pyranometer + Pyrgeometer Pyranometer Short Wave Irradiance Pyrgeometer Long Wave Irradiance Time Irradiance (W/m 2)

Ceilometer Reflectivity Cloud base height (up to 3) Mixing Layer Height

Ceilometer Reflectivity Cloud base height (up to 3) Mixing Layer Height

Ceilometer Reflectivity Cloud base height (up to 3) Mixing Layer Height

Ceilometer Reflectivity Cloud base height (up to 3) Mixing Layer Height Looks for the end of high reflectivity due to Aerosols Detection rate between 40% and 62% De Haij et al.

Disdrometer Drop size and velocity Distribution

Micro Rain Radar Reflectivity Rain Rate Fall velocity Liquid Water Content Drop size distribution Drop number distribution

Micro Rain Radar Reflectivity Rain Rate Fall velocity Liquid Water Content Drop size distribution Drop number distribution

Micro Rain Radar Reflectivity Rain Rate Fall velocity Liquid Water Content Drop size distribution Drop number distribution

Micro Rain Radar Reflectivity Rain Rate Fall velocity Liquid Water Content Drop size distribution Drop number distribution

Sunphotometer Preliminary Sun Spectrum (317nm nm) Langley Plot Airmass τ = ln(counts)

Ozone Analyzer Preliminary in situ Ozone amounts (ppb) Running 5 minute average Mixing Ratio (ppb)

South Facing Web Cam

Data Access – Skywatch website

April 7th, 2010 Brightness Temperature: ~272K ~252K Time Irradiance Height (above Ground)

April 7th, 2010 – part 2 Time Rain Intensity

November 14th, 2009

November 14th, part 2

Future Instruments Solar Spectral Flux Radiometer Hyperspectral Irradiance Radiance (sun tracking, almucantar and others) Rain Gauge Absolute rain amount and rate All Sky Camera

Future Data Products Sunphotometer Aerosol Optical Depth All sky imagery Solar Spectral Flux Radiometers Irradiance and Radiance Aerosol Optical Depth Cloud Optical Depth and single scattering albedo Many others possible

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