Research / Campaigns

ALEM

Two-Column Aerosol Project (TCAP): Aerosol Light Extinction Measurements

15 July 2012 - 31 January 2013

Lead Scientist: Manvendra Dubey

Observatory: OSC, PVC

We deployed LANL’s new Cavity Attenuated Phase Shift extinction (CAPS PMex) monitor (built by Aerodyne) that measures light extinction by utilizing a visible light-emitting diode (LED) as a light source, a sample cell incorporating two high reflectivity mirrors centered at the wavelength of the LED and a vacuum photodiode detector. Its efficacy is based on the fact that aerosols are broadband scatterers and absorbers of light. The input LED is square wave modulated and passed through the sample cell that distort it due to exponential decay by aerosol light absorption and scattering and this is measured at the detector. The amount of phase shift of the light at the detector is used to determine the light extinction. This extinction measurement provides an absolute value, requiring no calibration.

Related Publications

View all

Fast et al. "Model representations of aerosol layers transported from North America over the Atlantic Ocean during the Two-Column Aerosol Project". 2016. 10.1002/2016jd025248.

Related Campaigns

Two-Column Aerosol Project (TCAP)

Co-Investigators

Allison Aiken

Larry Berg

Andrew Freedman

Kyle Gorkowski

Timeline

PVC Data Sources

Name	Full Name	Browse Data
`ACSM`	Aerosol Chemical Speciation Monitor	Browse Data
`AERI`	Atmospheric Emitted Radiance Interferometer	Browse Data
`AERINF`	AERI Noise Filtered	Browse Data
`AETH`	Aethalometer	Browse Data
`AIP`	Aerosol Intensive Properties	Browse Data
`AOD`	Aerosol Optical Depth, derived from atmospheric extinction of solar irradiance	Browse Data
`AOD-MFRSR`	Aerosol Optical Depth (AOD) derived from MFRSR measurements	Browse Data
`AOS`	Aerosol Observing System	Browse Data
`AOSCCNAVG`	Aerosol Observing System (AOS): cloud condensation nuclei data, averaged	Browse Data
`AOSMET`	Meteorological Measurements associated with the Aerosol Observing System	Browse Data
`CAMSITE`	camera that monitors a site area	Browse Data
`CCN`	Cloud Condensation Nuclei Particle Counter	Browse Data
`CEIL`	Ceilometer	Browse Data
`CEILPBLHT`	Boundary-layer height data with CEIL	Browse Data
`CLAP`	Continuous Light Absorption Photometer	Browse Data
`CO-ANALYZER`	Carbon Monoxide Analyzer	Browse Data
`CPC`	Condensation Particle Counter	Browse Data
`CSPHOT`	Sunphotometer	Browse Data
`DL`	Doppler Lidar	Browse Data
`DLPROF-WIND`	Doppler Lidar Horizontal Wind Profiles	Browse Data
`DLPROF-WSTATS`	Doppler Lidar Wind Statistics Profiles	Browse Data
`ECMWFDIAG`	European Centre for Medium Range Weather Forecasts Diagnostic Analyses	Browse Data
`ECOR`	Eddy Correlation Flux Measurement System	Browse Data
`GNDRAD`	Ground Radiometers on Stand for Upwelling Radiation	Browse Data
`HTDMA`	Humidified Tandem Differential Mobility Analyzer	Browse Data
`INTERPSONDE`	Interpolated Sonde	Browse Data
`IRT`	Infrared Thermometer	Browse Data
`KASACR`	Ka-Band Scanning ARM Cloud Radar	Browse Data
`MET`	Surface Meteorological Instrumentation	Browse Data
`MFR`	Multifilter Radiometer	Browse Data
`MFRSR`	Multifilter Rotating Shadowband Radiometer	Browse Data
`MFRSRCLDOD`	Cloud Optical Properties from MFRSR Using Min Algorithm	Browse Data
`MICROBASE`	Continuous Baseline Microphysical Retrieval	Browse Data
`MPL`	Micropulse Lidar	Browse Data
`MPLCMASK`	Cloud mask from Micropulse Lidar	Browse Data
`MWR`	Microwave Radiometer	Browse Data
`MWR3C`	Microwave Radiometer, 3 Channel	Browse Data
`MWRHF`	Microwave Radiometer - High Frequency	Browse Data
`MWRP`	Microwave Radiometer Profiler	Browse Data
`MWRRET`	MWR Retrievals	Browse Data
`NEPHELOMETER`	Nephelometer	Browse Data
`NFOV`	Narrow Field of View Zenith Radiometer	Browse Data
`NOX`	Nitrogen Oxides Monitor	Browse Data
`OZONE`	Ozone Monitor	Browse Data
`PASS`	Photoacoustic Soot Spectrometer	Browse Data
`PBLHT`	Planetary Boundary Layer Height	Browse Data
`PSAP`	Particle Soot Absorption Photometer	Browse Data
`QCRAD`	Data Quality Assessment for ARM Radiation Data	Browse Data
`RWP`	Radar Wind Profiler	Browse Data
`SACRADVVAD`	SACR Advance Velocity Azimuth Display	Browse Data
`SACRCOR`	Scanning ARM Cloud Radar Corrections	Browse Data
`SASHE`	Shortwave Array Spectroradiometer-Hemispheric	Browse Data
`SASZE`	Shortwave Array Spectroradiometer-Zenith	Browse Data
`SEBS`	Surface Energy Balance System	Browse Data
`SKYRAD`	Sky Radiometers on Stand for Downwelling Radiation	Browse Data
`SMPS`	Scanning mobility particle sizer	Browse Data
`SO2`	Sulfur Dioxide Monitor	Browse Data
`SODAR`	Mini Sound Detection and Ranging	Browse Data
`SONDE`	Balloon-Borne Sounding System	Browse Data
`SONDEADJUST`	Sonde Adjust	Browse Data
`SONDEGRID`	Gridded Sonde VAP Product	Browse Data
`TSI`	Total Sky Imager	Browse Data
`UHSAS`	Ultra-High Sensitivity Aerosol Spectrometer	Browse Data
`WACR`	W-Band (95 GHz) ARM Cloud Radar	Browse Data
`WACRARSCL`	W-band Cloud Radar Active Remote Sensing of Cloud	Browse Data
`WSACR`	W-band Scanning ARM Cloud Radar	Browse Data