Atmospheric Radiation Measurement Climate Research Facility US Department of Energy

Two-Column Aerosol Project (TCAP): Field Evaluation of Real-time Cloud OD Sensor TWST

15 April 2013 - 21 June 2013

Lead Scientist: Herman Scott

Observatory: AMF, PVC

This was an IRAD funded project by Aerodyne Research, Inc to demonstrate the field-worthiness and assess the performance of a real-time Cloud OD sensor (dubbed TWST) through a side-by-side comparison with proven, ground-based operational sensors currently deployed at the AMF site on the Cape Cod National Seashore for TCAP. We anticipated direct comparisons with the SAS instrument and expected ancillary data from other sensors such as the Total Sky Imager and the Scanning Cloud Radar to facilitate and validate these comparisons. Since the cloud optical depth retrieval algorithms used by SAS and TWST are totally independent, this deployment provided a unique opportunity to evaluate the field performance of TWST. If the effort proves successful, it may qualify TWST for operational service or additional evaluation effort.


Ed Niple


Niple E, H Scott, J Conant, F Iannarilli, and S Jones. 2016. Field Evaluation of Real-time Cloud OD Sensor TWST during the DOE ARM TCAP Campaign 2013 Final Campaign Report. Ed. by Robert Stafford, DOE ARM Climate Research Facility. DOE/SC-ARM-14-018.


Müller D, CA Hostetler, RA Ferrare, SP Burton, E Chemyakin, A Kolgotin, JW Hair, JW Cook, DB Harper, RR Rogers, RW Hare, CS Cleckner, MD Obland, J Tomlinson, LK Berg, and B Schmid. 2014. "Airborne Multiwavelength High Spectral Resolution Lidar (HSRL-2) observations during TCAP 2012: vertical profiles of optical and microphysical properties of a smoke/urban haze plume over the northeastern coast of the US." Atmospheric Measurement Techniques, 7(10), 10.5194/amt-7-3487-2014.

Mather J. 2014. 2013 Annual Report. Ed. by Sarah Shoemaker, DOE ARM Climate Research Facility. DOE/SC-ARM-13-023.


Shinozuka Y, RR Johnson, CJ Flynn, PB Russell, B Schmid, J Redemann, SE Dunagan, CD Kluzek, JM Hubbe, M Segal-Rosenheimer, JM Livingston, TF Eck, R Wagener, L Gregory, D Chand, LK Berg, RR Rogers, RA Ferrare, JW Hair, CA Hostetler, and SP Burton. 2013. "Hyperspectral aerosol optical depths from TCAP flights." Journal of Geophysical Research: Atmospheres, 118(21), 10.1002/2013jd020596.

Kassianov E, J Barnard, M Pekour, L Berg, J Michalsky, K Lantz, and G Hodges. 2013. "Do diurnal aerosol changes affect daily average radiative forcing?" Geophysical Research Letters, 40(12), 10.1002/grl.50567.

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Campaign Data Sets

IOP Participant Data Source Name Final Data
Herman Scott Three Waveband Spectrally-agile Technique Sensor Order Data

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
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 Cimel Sunphotometer Browse Data
DL Doppler Lidar Browse Data
DLPROF Doppler Lidar 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
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
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
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
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
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