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- W4226345087 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> The micropulse differential absorption lidar (MPD) was developed at Montana State University (MSU) and the National Center for Atmospheric Research (NCAR) to perform range-resolved water vapor (WV) measurements using low-power lasers and photon-counting detectors. The MPD has proven to produce accurate WV measurements up to 6âkm altitude. However, the MPD's ability to produce accurate higher-altitude WV measurements is impeded by the current standard differential absorption lidar (DIAL) retrieval methods. These methods are built upon a fundamental methodology that algebraically solves for the WV using the MPD forward models and noisy observations, which exacerbates any random noise in the lidar observations. The work in this paper introduces the adapted Poisson total variation (PTV) specifically for the MPD instrument. PTV was originally developed for a ground-based high spectral resolution lidar, and this paper reports on the adaptations that were required in order to apply PTV on MPD WV observations. The adapted PTV method, coined PTV-MPD, extends the maximum altitude of the MPD from 6 to 8âkm and substantially increases the accuracy of the WV retrievals starting above 2âkm. PTV-MPD achieves the improvement by simultaneously denoising the MPD noisy observations and inferring the WV by separating the random noise from the non-random WV. An analysis with 130Â radiosonde (RS) comparisons shows that the relative root-mean-square difference (RRMSE) of WV measurements between RS and PTV-MPD exceeds 100â% between 6 and 8âkm, whereas the RRMSE between RS and the standard method exceeds 100â% near 3âkm. In addition, we show that by employing PTV-MPD, the MPD is able to extend its useful range of WV estimates beyond that of the ARM Southern Great Plains Raman lidar (RRMSE exceeding 100â% between 3 and 4âkm); the Raman lidar has a power-aperture product 500Â times greater than that of the MPD." @default.
- W4226345087 created "2022-05-05" @default.
- W4226345087 date "2022-04-01" @default.
- W4226345087 modified "2023-09-30" @default.
- W4226345087 title "Comment on amt-2021-352" @default.
- W4226345087 doi "https://doi.org/10.5194/amt-2021-352-rc1" @default.
- W4226345087 hasPublicationYear "2022" @default.
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