Atmospheric Radiation Measurement Climate Research Facility US Department of Energy



Tracking Aerosol Convection Interactions Experiment (TRACER)

1 October 2021 - 30 September 2022

Lead Scientist: Michael Jensen

Observatory: amf

During the Tracking Aerosol Convection Interactions Experiment (TRACER), scientists will use the first ARM Mobile Facility (AMF1), the second generation C-band ARM Scanning Precipitation Radar (CSAPR2), and a small satellite site with radiosonde and aerosol measurements to learn more about cloud and aerosol interactions in the deep convection over the Houston area. The Houston region offers a unique environment where isolated convective systems are common and experience a spectrum of polluted aerosol conditions from urban and industrial areas. In addition, surrounding areas also show significantly lower background aerosol concentrations. A climatological analysis of radar observations from the Houston/Galveston area NXRAD (KHGX) show that convective initiation occurs in this area on 40 to 55 percent of the days each month of the year. The total number of convective events is strongly peaked during the months of June through September. An intensive operational period will be held June 1, 2021, to September 30, 2021, to capture these events.


Sarah Brooks Pavlos Kollias Rebecca Sheesley
Don Collins Chongai Kuang Jeffrey Snyder
Scott Collis Matthew Kumjian Philip Stier
Eric Defer Toshihisa Matsui Sascha Usenko
Jiwen Fan Greg McFarquhar Sue van den Heever
James Flynn Chris Nowotarski Marcus van Lier-Walqui
Ann Fridlind Richard Orville Adam Varble
Scott Giangrande Mariko Oue Yuxuan Wang
Robert Griffin Anita Rapp Guang Zhang
Jiaxi Hu Daniel Rosenfeld Renyi Zhang
Robert Jackson Alexander Ryzhkov


Mei F, D Dexheimer, J Fast, M Diao, B Geerts, A Bucholtz, L Riihimaki, C Flynn, T Thornberry, T Campos, S Springston, C Kuang, J Tomlinson, and B Schmid. 2020. ARM Aerial Instrument Workshop Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-20-010.


Dorsey K. 2019. Tracking Aerosol Convection interactions ExpeRiment. Ed. by Rolanda Jundt, ARM user facility. DOE/SC-ARM-19-024.

Jensen M, E Bruning, D Collins, A Fridlind, P Kollias, C Kuang, D Rosenfeld, A Ryzhkov, A Varble, SD Brooks, S Collis, E Defer, J Fan, J Flynn, S Giangrande, R Griffin, J Hu, R Jackson, M Kumjian, T Logan, T Matsui, G McFarquhar, C Nowotarski, J Quaas, M Oue, R Sheesley, J Snyder, P Stier, S Usenko, S van den Heever, M van Lier Walqui, Y Wang, Y Xu, and G Zhang. 2019. Tracking Aerosol Convection Interactions ExpeRiment (TRACER) Science Plan. Ed. by Robert Stafford, DOE/SC-ARM-19-017.

Fridlind A, M van Lier-Walqui, S Collis, S Giangrande, R Jackson, X Li, T Matsui, R Orville, M Picel, D Rosenfeld, A Ryzhkov, R Weitz, and P Zhang. 2019. "Use of polarimetric radar measurements to constrain simulated convective cell evolution: A pilot study with Lagrangian tracking." Atmospheric Measurement Techniques, 12(6), doi:10.5194/amt-12-2979-2019.
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