Atmospheric Radiation Measurement Climate Research Facility US Department of Energy

rlprof > Raman LIDAR Vertical ProfilesVAP Type(s) > Baseline • Evaluation • Guest

Aerosol scattering ratio (left) and aerosol extinction (right).

The Raman lidar automatically attempts to reoptimize the position of the laser beam in the detector’s field of view every few hours (this is required for most narrow-field-of-view lidar systems). However, this can introduce alignment artifacts in the narrow-field-of-view data due to the way the detection channels are arranged on the optical bench. A suite of VAPs have been developed to reduce or remove any artifacts introduced in the narrow-field-of-view data by these automatic self-alignment “tweaks.” For more details, see each VAP process web page of the Raman Lidar Profiles:

  • Aerosol Scattering Ratio,
  • Best Estimate Product,
  • Depolarization Ratio,
  • Aerosol Extinction,
  • Mixing Ratio and Merge.

For more information about the Raman Lidar Profiles Best Estimate VAP (RLPROFBE), see the VAP report. For more information about the Raman Lidar Profiles Merge (RLPROFMERGE) VAP that is used as input to all the Raman Lidar Profiles VAPs, please see this report. For more information about the Raman Lidar Water Vapor Mixing Ratio and Temperature VAPs, see this report.


The data set represents output from a revised version of the Raman lidar water vapor mixing ratio VAP, which will replace the older mixing ratio VAP. We are currently working to get this VAP implemented operationally at the DMF. This will involve integrating the new code into ADI, which will likely take a few months to complete. In the meantime, we are making these new data available through the evaluation archive in order to enable access by the science community.


  • Fixed
  • AMF1
  • AMF2
  • AMF3


rl: Raman Lidar

Active Locations

Facility Name Start Date
Central Facility, Lamont, OK 1998-03-01
Graciosa Island, Azores, Portugal 2015-09-04

Data Details

Developed By Rob Newsom
Contact Rob Newsom
Resource(s) Data Directory
Data format netcdf
Site ENA
Content time range 1 March 1998 - 2 December 2021
Attribute accuracy No formal attribute accuracy tests were conducted.
Positional accuracy with GPS
Data Consistency and Completeness The data set contains bad values that have been flagged with -9999. Also, each of the primary variables has an associated precision (random uncertainty) variable. Users can identify and filter out poor-quality data by imposing a precision (or relative precision) threshold. A relative precision threshold of between 10 to 30% is effective at removing much of the poorer-quality measurements.
Access Restriction No access constraints are associated with this data.
Use Restriction No use constraints are associated with this data.
File naming convention Closely follows ARM standard, i.e., 10rlprofmr1news.c0


Subba T, M Lawler, and A Steiner. 2021. "Estimation of possible primary biological particle emissions and rupture events at the Southern Great Plains ARM site." Journal of Geophysical Research: Atmospheres, 126(16), e2021JD034679, 10.1029/2021JD034679.


Dawson K, R Ferrare, R Moore, M Clayton, T Thorsen, and E Eloranta. 2020. "Ambient Aerosol Hygroscopic Growth From Combined Raman Lidar and HSRL." Journal of Geophysical Research: Atmospheres, 125(7), e2019JD031708, 10.1029/2019JD031708.


Newsom R and C Sivaraman. 2018. Raman Lidar Water Vapor Mixing Ratio and Temperature Value-Added Products. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-218.


Tridon F, A Battaglia, and D Watters. 2017. "Evaporation in action sensed by multiwavelength Doppler radars." Journal of Geophysical Research: Atmospheres, 122(17), 10.1002/2016JD025998.

Chen H, A Hodshire, J Ortega, J Greenberg, P McMurry, A Carlton, J Pierce, D Hanson, and J Smith. 2017. "Vertically resolved concentration and liquid water content of atmospheric nanoparticles at the US DOE Southern Great Plains site." Atmospheric Chemistry and Physics, 18(1), doi:10.5194/acp-18-311-2018.
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