Editorial Type:
Article
Article Type:
Research Article

Validation of a Water Vapor Micropulse Differential Absorption Lidar (DIAL)

Tammy M. Weckwerth Earth Observing Laboratory, National Center for Atmospheric Research, Boulder, Colorado

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Kristy J. Weber Earth Observing Laboratory, National Center for Atmospheric Research, Boulder, Colorado

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David D. Turner National Oceanic and Atmospheric Administration/National Severe Storms Laboratory, Norman, Oklahoma

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Scott M. Spuler Earth Observing Laboratory, National Center for Atmospheric Research, Boulder, Colorado

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Print Publication:
01 Nov 2016
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Plains Elevated Convection At Night (PECAN)
DOI:
https://doi.org/10.1175/JTECH-D-16-0119.1
Page(s):
2353–2372
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Abstract

A water vapor micropulse differential absorption lidar (DIAL) instrument was developed collaboratively by the National Center for Atmospheric Research (NCAR) and Montana State University (MSU). This innovative, eye-safe, low-power, diode-laser-based system has demonstrated the ability to obtain unattended continuous observations in both day and night. Data comparisons with well-established water vapor observing systems, including radiosondes, Atmospheric Emitted Radiance Interferometers (AERIs), microwave radiometer profilers (MWRPs), and ground-based global positioning system (GPS) receivers, show excellent agreement. The Pearson’s correlation coefficient for the DIAL and radiosondes is consistently greater than 0.6 from 300 m up to 4.5 km AGL at night and up to 3.5 km AGL during the day. The Pearson’s correlation coefficient for the DIAL and AERI is greater than 0.6 from 300 m up to 2.25 km at night and from 300 m up to 2.0 km during the day. Further comparison with the continuously operating GPS instrumentation illustrates consistent temporal trends when integrating the DIAL measurements up to 6 km AGL.

The National Center for Atmospheric Research is sponsored by the National Science Foundation.

Current affiliation: Global Systems Division, NOAA/Earth System Research Laboratory, Boulder, Colorado.

Corresponding author address: Tammy Weckwerth, Earth Observing Laboratory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80303. E-mail: tammy@ucar.edu

This article is included in the Plains Elevated Convection At Night (PECAN) Special Collection.

Abstract

A water vapor micropulse differential absorption lidar (DIAL) instrument was developed collaboratively by the National Center for Atmospheric Research (NCAR) and Montana State University (MSU). This innovative, eye-safe, low-power, diode-laser-based system has demonstrated the ability to obtain unattended continuous observations in both day and night. Data comparisons with well-established water vapor observing systems, including radiosondes, Atmospheric Emitted Radiance Interferometers (AERIs), microwave radiometer profilers (MWRPs), and ground-based global positioning system (GPS) receivers, show excellent agreement. The Pearson’s correlation coefficient for the DIAL and radiosondes is consistently greater than 0.6 from 300 m up to 4.5 km AGL at night and up to 3.5 km AGL during the day. The Pearson’s correlation coefficient for the DIAL and AERI is greater than 0.6 from 300 m up to 2.25 km at night and from 300 m up to 2.0 km during the day. Further comparison with the continuously operating GPS instrumentation illustrates consistent temporal trends when integrating the DIAL measurements up to 6 km AGL.

The National Center for Atmospheric Research is sponsored by the National Science Foundation.

Current affiliation: Global Systems Division, NOAA/Earth System Research Laboratory, Boulder, Colorado.

Corresponding author address: Tammy Weckwerth, Earth Observing Laboratory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80303. E-mail: tammy@ucar.edu

This article is included in the Plains Elevated Convection At Night (PECAN) Special Collection.

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