Radiative Heating in Underexplored Bands Campaign 2 (RHUBC-II)

14 August 2009 - 24 October 2009

Lead Scientist: David Turner

Observatory: amf, osc

The Radiative Heating in Underexplored Bands Campaign (RHUBC-II) was selected for support by ACRF as an off-site campaign. Led by principal investigators David Turner and Eli Mlawer, RHUBC-II took place from August to October 2009 at a location near Cerro Chajnantor in Chile, at an altitude of more than 5,000 m. This effort was a follow-on to RHUBC-I, conducted from February 22 to March 14, 2007, at the ACRF North Slope of Alaska site in Barrow. During RHUBC-II, the same spectral band was explored; however this absorption bands was much more transparent in the dry, low pressure conditions at Chajnantor. These conditions represent the upper troposphere that is poorly observed but important for climate studies. Therefore, significant fundamental advances that are pertinent to reducing uncertainties in the radiation calculation of global climate models were gained.

Science Objectives:

  • To conduct clear-sky radiative closure studies in order to reduce the key uncertainties in the water vapor spectroscopy, including the foreign-broadened water vapor continuum and water vapor absorption line parameters. This campaign will provide a dataset with extremely low water vapor conditions (precipitable water vapor at the Chajnantor Plateau is generally less 1 mm) collected at nearly typical mid-tropospheric temperatures and pressures.
  • The investigation of the radiative properties of cirrus in the far-infrared using the spectrally resolved observations from the ground-based interferometers. The micropulse lidar (MPL) will provide accurate cloud boundaries for the infrared calculations, as well as cirrus optical depth, which will maximize the scientific value of this data set.


Eli Mlawer



Mlawer E, D Turner, S Paine, L Palchetti, G Bianchini, V Payne, K Cady‐Pereira, R Pernak, M Alvarado, D Gombos, J Delamere, M Mlynczak, and J Mast. 2019. "Analysis of water vapor absorption in the far‐infrared and submillimeter regions using surface radiometric measurements from extremely dry locations." Journal of Geophysical Research: Atmospheres, 124(14), 10.1029/2018JD029508.


Dzambo A, D Turner, and E Mlawer. 2016. "Evaluation of two Vaisala RS92 radiosonde solar radiative dry bias correction algorithms." Atmospheric Measurement Techniques, 9(4), 10.5194/amt-9-1613-2016.


Dzambo AM, DD Turner, and EJ Mlawer. 2015. "Evaluation of two Vaisala RS92 radiosonde solar radiative dry bias correction algorithms." Atmospheric Measurement Techniques Discussions, 8(10), 10.5194/amtd-8-10755-2015.


Paine SN and DD Turner. 2013. "Processing and Calibration of Submillimeter Fourier Transform Radiometer Spectra From the RHUBC-II Campaign." IEEE Transactions on Geoscience and Remote Sensing, 51(12), 10.1109/tgrs.2012.2231869.

Marin JC, D Pozo, EJ Mlawer, DD Turner, and M Cure. 2013. "Dynamics of Local Circulations in Mountainous Terrain during the RHUBC-II Project." Monthly Weather Review, 141(10), 10.1175/mwr-d-12-00245.1.

Maschwitz G, U Löhnert, S Crewell, T Rose, and DD Turner. 2013. "Investigation of ground-based microwave radiometer calibration techniques at 530 Hpa." Atmospheric Measurement Techniques, 6, 10.5194/amt-6-2641-2013.
Research Highlight

Mather JH. 2013. Accomplishments in Atmospheric Science 2008-2013. Ed. by L. Roeder, U.S. Department of Energy. DOE/SC-0159. 10.2172/1616673.

Mather JH and JW Voyles. 2013. "The ARM Climate Research Facility: A Review of Structure and Capabilities." Bulletin of the American Meteorological Society, 94(3), 10.1175/bams-d-11-00218.1.
Research Highlight

Mlawer E, D Turner, K Cady-Pereira, D Gombos, DN Bopege, A Chase, V Payne, and M Cadeddu. 2013. Analysis of Spectra from the RHUBC-II Campaign. Presented at 4th Atmospheric System Research (ASR) Science Team Meeting. Potomac, MD.


Turner DD, EJ Mlawer, G Bianchini, MP Cadeddu, S Crewell, JS Delamere, RO Knuteson, G Maschwitz, M Mlynzcak, S Paine, L Palchetti, and DC Tobin. 2012. "Ground-based high spectral resolution observations of the entire terrestrial spectrum under extremely dry conditions." Geophysical Research Letters, 39(10), L10801, 10.1029/2012gl051542.
Research Highlight

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Campaign Data Sets

IOP Participant Data Source Name Final Data
Maria Cadeddu G-band Vapor Radiometer Profiler Data Order Data
Richard Coulter Micropulse Lidar Order Data
Susanne Crewell Humidity and Temperature Profiler Data Order Data
Jennifer Delamere Radiometer Order Data
Jennifer Delamere Surface Meteorology Order Data
Tom Hawat ASTI Order Data
Gary Hodges Multifilter Rotating Shadowband Radiometer- T0 Site Order Data
Martin Mlynczak Far Infrared Spectrometer Order Data
Scott Paine Sub-Millimeter Spectrometer Order Data
Luca Palchetti Prototype Far Infrared Spectrometer Order Data
David Turner AERI Retrieved Thermodynamic Profiles and Cloud Properties Order Data
David Turner GOES Order Data
David Turner Radiosonde Data Order Data