Home » Airborne Platforms » Airborne Laboratory for Atmospheric Research (ALAR)
Airborne Laboratory for Atmospheric Research (ALAR)
STATUS
Operational
AVAILABILITY
Open; costs are $200/flight hr. + data analysis costs.
REQUEST PROCEDURE
Contact Paul Shepson, pshepson@purdue.edu
Airborne Platforms
The ALAR platform is a light twin engine aircraft, a Beechcraft Duchess, instrumented with a GPS/INS attitude system, and a turbulence probe (BAT probe) mounted on the nose. This system enables 50Hz 3D winds, enabling its use for airborne flux measurements. The wind system has been wind-tunnel calibrated (Garman et al., 2006). The vertical wind uncertainty is +/-6cm/s. The aicraft has an all-Teflon fast sampling system to enable eddy covariance flux measurements, and fast response CO2 instrumentation. We often fly with a spectral radiometer for surface reflectance measurements. The aircraft also has a cloud water collector.
CONTACT
Paul Shepson
Purdue Climate Change Research Center
560 Oval Dr. West Lafayette, IN 47907
pshepson@purdue.edu
http://www.chem.purdue.edu/shepson/alar.html
SPECIFICATIONS
Aircraft TypeBeechcraft Duchess (BE76/G)
Payload400
Range700
Ceiling18,000
Endurance5 hr.
CapabilityEddy covariance fluxes; Experimental certificate
Airspeed Range85 - 160
Runway Requirements2000ft.
Max Takeoff Weight3100
Max Fuel Weight600
Flight CrewPilot and Mission Scientist
Number of Seats1
Airworthiness CertificateExperimental
Typical UsesDedicated to atmospheric research
Data SystemOn-board computer for winds, attitude, Fast T, CO2
Special Field Support Needscoffee
Research Power~1kW, 12-32V DC, 120V AC
Cabin Environmentnon-pressurized
Rack Space Available2 19" racks for instruments
Available InletsPFA sampling manifold, with 0.1s residence time
Available AperturesFast sampling PFA inlet, cloud water sampling port, spectral radiometer ports
Available Hard PointsYes
External PodsNone.
Standard Instruments3D winds at 50Hz, CO2
Training RequirementsBriefing by PIC
Communicationsintercom
Available InstrumentsO3, CO, NOx/NOy, SMPS
Other SystemsVOCs and PAN are possible
User SupportPB Shepson
REFERENCES
K.E. Garman, K.A. Hill, P. Wyss, M. Carlsen, J.R. Zimmerman, B.H. Stirm, T.Q. Carney, R. Santini, and P.B. Shepson, An Airborne and Wind Tunnel Evaluation of a Wind Turbulence Measurement System for Aircraft-based Flux Measurements, J. Ocean and Atmos. Technol., 23, 1696-1708, 2006. Mays, K.L., P.B. Shepson, B.H. Stirm, A. Karion, C. Sweeney, K.R. Gurney. Aircraft-Based Measurements of the Carbon Footprint of Indianapolis. Environ. Sci. Technol., DOI: 10.1021/es901236b, 2009. Zhang, N., X. Zhou, P. B. Shepson, H. Gao, M. Alaghmand, and B. Stirm (2009), Aircraft measurement of HONO vertical profiles over a forested region, Geophys. Res. Lett., 36, L15820, doi:10.1029/2009GL038999. Martins, D. K., Sweeney, C., Stirm B. H., and Shepson P. B., Regional surface flux of CO2 inferred from changes in the advected CO2 column density, Agric. Forest Meteorol. (2009), 149, 1674-1685. Hill, K. A., P. B. Shepson, E. S. Galbavy, C. Anastasio, P. S. Kourtev, A. Konopka, and B. H. Stirm (2007), Processing of atmospheric nitrogen by clouds above a forest environment, J. Geophys. Res., 112, D11301, doi:10.1029/2006JD008002. K. E. Garman, P. Wyss, M. Carlsen, J. R. Zimmerman, B. H. Stirm, T. Q. Carney, R. Santini, and P. B. Shepson, The contribution of variability of lift-induced upwash to the uncertainty in vertical winds determined from an aircraft platform, Boundary Layer Meteor., 126, 461-476, 2008.
REMARKS
We like to collaborate.
UPDATED ON
5 Nov 2009 13:31