Atmospheric Radiation Measurement Climate Research Facility US Department of Energy

Two-Column Aerosol Project (TCAP)

1 July 2012 - 30 June 2013

Lead Scientist: Larry Berg

Observatory: AMF, PVC

There remain many key knowledge gaps despite advances in the scientific understanding of how aerosols and clouds evolve and affect climate. Many climatically important processes depend on particles that undergo continuous changes within a size range spanning a few nanometers to a few microns, and with compositions that consist of a variety of carbonaceous materials, soluble inorganic salts and acids and insoluble mineral dust. Primary particles, which are externally-mixed when emitted, are subject to coagulation and chemical changes associated with the condensation of semi-volatile gases to their surface resulting in a spectrum of compositions or mixing-states with a range of climate-affecting optical and hygroscopic properties. The numerical treatments of aerosol transformation and cloud-aerosol interactions are highly simplified in large-scale models, contributing to the uncertainties associated with aerosol direct and indirect forcing in climate models used to determine safe levels of greenhouse gases for the Earth system.

This campaign was designed to provide a detailed set of observations with which to:

  • perform radiative and cloud condensation nuclei (CCN) closure studies
  • evaluate a new retrieval algorithm for aerosol optical depth (AOD) in the presence of clouds using passive remote sensing
  • extend a previously developed technique to investigate aerosol indirect effects, and
  • evaluate the performance of a detailed regional-scale model and a more parameterized global-scale model in simulating particle activation and AOD associated with the aging of anthropogenic aerosols.

To meet these science objectives, the ARM Mobile Facility (AMF) and the Mobile Aerosol Observing System (MAOS) was deployed on Cape Cod, Massachusetts, for a 12-month period starting in the summer of 2012 in order to quantify aerosol properties, radiation, and cloud characteristics at a location subject to both clear and cloudy conditions, and clean and polluted conditions. These observations were supplemented by two aircraft intensive observational periods, one in the summer and a second in the winter. Each intensive observational period required two aircraft.

The ARM Mobile Facility was deployed on Cape Cod, Massachusetts, for 12 months starting in the summer of 2012.
The ARM Mobile Facility was deployed on Cape Cod, Massachusetts, for 12 months starting in the summer of 2012.

Co-Investigators

Richard Ferrare
Chris Hostetler

Related Publications

2016

Niple ER, HE Scott, JA Conant, SH Jones, FJ Iannarilli, and WE Pereira. 2016. "Application of oxygen A-band equivalent width to disambiguate downwelling radiances for cloud optical depth measurement." Atmospheric Measurement Techniques, 9(9), amt-9-4167-2016, 10.5194/amt-9-4167-2016.

Cziczo D. 2016. Understanding the Effect of Aerosol Properties on Cloud Droplet Formation during TCAP Field Campaign Report. Ed. by Robert Stafford, DOE ARM Climate Research Facility. DOE/SC-ARM-15-055.

2015

Shinozuka Y, AD Clarke, A Nenes, A Jefferson, R Wood, CS McNaughton, J Strom, P Tunved, J Redemann, KL Thornhill, RH Moore, TL Lathem, JJ Lin, and YJ Yoon. 2015. "The relationship between cloud condensation nuclei (CCN) concentration and light extinction of dried particles: indications of underlying aerosol processes and implications for satellite-based CCN estimates." Atmospheric Chemistry and Physics, 15(13), 10.5194/acp-15-7585-2015.

2014

Kassianov E, J Barnard, M Pekour, LK Berg, J Shilling, C Flynn, F Mei, and A Jefferson. 2014. "Simultaneous retrieval of effective refractive index and density from size distribution and light scattering data: Weakly absorbing aerosol." Atmospheric Measurement Techniques, 7, 10.5194/amt-7-3247-2014.
Research Highlight

Titos G, A Jefferson, PJ Sheridan, E Andrews, H Lyamani, L Alados-Arboledas, and JA Ogren. 2014. "Aerosol light-scattering enhancement due to water uptake during the TCAP campaign." Atmospheric Chemistry and Physics, 14(13), 10.5194/acp-14-7031-2014.

2013

Lamer K, A Taterevic, I Jo, and P Kollias. 2013. "Evaluation of gridded Scanning ARM Cloud Radar reflectivity observations and vertical Doppler velocity retrievals." Atmospheric Measurement Techniques Discussions, 6(6), 10.5194/amtd-6-9579-2013.
Research Highlight

Aiken A, M Dubey, and S Liu. 2013. PASS3 Measurements from Two DOE ARM Aerosol Observing Systems (AOS): SGP and the Recent MAOS Deployments for PACE and TCAP. Presented at 4th Atmospheric System Research (ASR) Science Team Meeting. Potomac, MD.

Chand D, L Berg, J Fast, B Schmid, J Barnard, C Berkowitz, E Chapman, J Comstock, C Flynn, J Hubbe, E Kassianov, C Kluzek, M Pekour, A Sedlacek, J Shilling, Y Shinozuka, J Tomlinson, J Wilson, and A Zelenyuk-Imre. 2013. In situ derived aerosol optical properties during the TCAP Phase-I Campaign. Presented at 4th Atmospheric System Research (ASR) Science Team Meeting. Potomac, MD.

Senum G and J Tomlinson. 2013. Aerosol Flux Measurements in CARES and TCAP. Presented at 4th Atmospheric System Research (ASR) Science Team Meeting. Potomac, MD.

Miller M, V Ghate, S Decker, and B Raney. 2013. Forward Modeling of Radar Observables Using a Large-eddy Simulation Model: A New Approach to Optimization of Cloud Radar Scan Strategies. Presented at 4th Atmospheric System Research (ASR) Science Team Meeting. Potomac, MD.


View All Related Publications

Campaign Data Sets

IOP Participant Data Source Name Final Data
Brian Cairns Research Scanning Polarimeter- B200 Aircraft Order Data
Duli Chand Nephelometer - G1 Aircraft Order Data
Duli Chand Particle Soot Absorption Photometer - G1 Aircraft Order Data
Duli Chand f_RH - G1 Aircraft Order Data
Jennifer Comstock Altitude Data - G1 Aircraft Order Data
Jennifer Comstock Cloud Aerosol Precip Spectrometer- G1 Aircraft Order Data
Jennifer Comstock Cloud Droplet Probe - G1 Aircraft Order Data
Jennifer Comstock Cloud Imaging Probe - G1 Aircraft Order Data
Jennifer Comstock Water Content - G1 Aircraft Order Data
Daniel Cziczo Aerosol Mass Spectrometer Order Data
Daniel Cziczo Cloud Condensation Nuclei Counter Order Data
Chris Hostetler High Spectral Resolution Lidar-2 - G1 Aircraft Order Data
John Hubbe Meteorology/State/Position Parameters- G1 Aircraft Order Data
Chuck Long Radiometers - G1 Aircraft Order Data
Joseph Michalsky MFRSR Order Data
Mikhail Pekour Aerodynamic Particle Sizer Order Data
Mikhail Pekour Counterflow Virtual Impactor Inlet - G1 Aircraft Order Data
Phil Russell 4STAR - Aerosol Optical Depth Order Data
Phil Russell 4STAR - Columnar Water Vapor - G1 Aircraft Order Data
Herman Scott Three Waveband Spectrally-agile Technique Sensor Order Data
Arthur Sedlacek Aethalometer Order Data
Arthur Sedlacek Single Particle Soot Photometer Order Data
Arthur Sedlacek Single Particle Soot Photometer- G1 Aircraft Order Data
John Shilling Aerosol Mass Spectrometer- G1 Aircraft Order Data
Stephen Springston Carbon Monoxide - G1 Aircraft Order Data
Stephen Springston Meteorological Data Order Data
Stephen Springston Particle Soot Absorption Photometer Order Data
Stephen Springston Trace Gases Order Data
Jason Tomlinson Condensation Particle Counters - G1 Aircraft Order Data
Jason Tomlinson Dual Column Cloud Condensation Nuclei Counter - G1 Aircraft Order Data
Jason Tomlinson Video - G1 Aircraft Order Data
Thomas Watson Particle-Into-Liquid Sampler (PILS) Order Data
Thomas Watson Particle-Into-Liquid Sampler (PILS)- G1 Aircraft Order Data
Alla Zelenyuk-Imre Mini Single Particle Mass Spectrometer - G1 Aircraft Order Data