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TexAQS 2006 OPAL Lidar data

Preliminary Data


August 2006
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September 2006
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uncalibrated backscatter calibrated aerosol backscatter ozone concentration

During the TexAQS 2006 experiment, the OPAL lidar aboard the R/V Ronald H. Brown measured profiles of aerosol backscatter at 355 nm and ozone. Data plots are available here for select days for three types of profiles: (1) calibrated aerosol backscatter coefficient, (2) ozone concentration, and (3) uncalibrated backscatter intensity.

The aerosol backscatter coefficient data (1) are range-corrected, and calibrated using a modified Klett retrieval method. These calibrated data combine all angles in the step-stare sequence (typically 2-, 6-, 20- and 90-degree elevation angles) and both near and far channels when possible. The white line in each image is a preliminary estimate of the aerosol mixed layer height based on strength of the gradient. The ozone concentration (2) is presented for 20-minute averages. The "quick look" intensity data (3) are the natural logarithm of the range-corrected aerosol backscatter intensity with no quality control and from only the vertical (90-degree) data.

These data are provided through the efforts of Janet Machol, Wynn Eberhard, Brandi McCarty, Richard Marchbanks, Christoph Senff, Sara Tucker, Alan Brewer, Joanne George, Dan Law, Ron Richter, and Scott Sandberg.

Data Status: These profiles are preliminary data.

Data Policy: We welcome collaborations and will assist in interpretation and evaluation of the data. Please discuss other available data products or any planned use of the data with one of the contact scientists. We request that an acknowledgment to the "NOAA Earth System Research Laboratory Chemical Sciences Division" accompany the use of this data in any publication or presentation.