the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Identification of the cloud base height over the central Himalayan region: Intercomparison of Ceilometer and Doppler Lidar
K. K. Shukla
K. Niranjan Kumar
D. V. Phanikumar
R. K. Newsom
V. R. Kotamarthi
T. B. M. J. Ouarda
M. V. Ratnam
Abstract. We present the measurement of cloud base height (CBH) derived from the Doppler Lidar (DL), Ceilometer (CM) and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite over a high altitude station in the central Himalayan region for the first time. We analyzed six cases of cloud overpass during the daytime convection period by using the cloud images captured by total sky imager. The occurrence of thick clouds (> 50 %) over the site is more frequent than thin clouds (< 40 %). In every case, the CBH indicates less than 1.2 km, above ground level (AGL) observed by both DL and CM instruments. The presence of low level clouds in the height-time variation of signal to noise ratio of DL and backscatter of CM shows a similar diurnal pattern on all days. Cloud fraction is found to be maximum during the convective period. The CBH estimated by the DL and CM showed reasonably good correlation (R2 = 0.76). The DL observed updraft fraction and cloud base vertical velocity also shows good correlation (R2 = 0.66). The inter-comparison between DL and CM will have implications in filling the gap of CBH measurements by the DL, in absence of CM. More deployments of such instruments will be invaluable for the validations of meteorological models over the observationally sparse Indian regions.
K. K. Shukla et al.


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RC1: 'REFEREE COMMENTS', Anonymous Referee #1, 01 Sep 2016
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AC3: 'RC1 comment replies', D.V. Phanikumar, 17 Nov 2016
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AC5: 'RC1: modified version', D.V. Phanikumar, 18 Nov 2016
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AC5: 'RC1: modified version', D.V. Phanikumar, 18 Nov 2016
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AC3: 'RC1 comment replies', D.V. Phanikumar, 17 Nov 2016
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SC1: 'a few brief comments', Matthias Wiegner, 14 Sep 2016
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AC1: 'SC1', D.V. Phanikumar, 17 Nov 2016
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AC1: 'SC1', D.V. Phanikumar, 17 Nov 2016
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RC2: 'Review comments', Anonymous Referee #2, 03 Oct 2016
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AC2: 'RC2 comment replies', D.V. Phanikumar, 17 Nov 2016
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AC2: 'RC2 comment replies', D.V. Phanikumar, 17 Nov 2016
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RC3: 'Review Comments', Anonymous Referee #3, 06 Oct 2016
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AC4: 'RC3 comment replies', D.V. Phanikumar, 17 Nov 2016


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RC1: 'REFEREE COMMENTS', Anonymous Referee #1, 01 Sep 2016
-
AC3: 'RC1 comment replies', D.V. Phanikumar, 17 Nov 2016
-
AC5: 'RC1: modified version', D.V. Phanikumar, 18 Nov 2016
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AC5: 'RC1: modified version', D.V. Phanikumar, 18 Nov 2016
-
AC3: 'RC1 comment replies', D.V. Phanikumar, 17 Nov 2016
-
SC1: 'a few brief comments', Matthias Wiegner, 14 Sep 2016
-
AC1: 'SC1', D.V. Phanikumar, 17 Nov 2016
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AC1: 'SC1', D.V. Phanikumar, 17 Nov 2016
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RC2: 'Review comments', Anonymous Referee #2, 03 Oct 2016
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AC2: 'RC2 comment replies', D.V. Phanikumar, 17 Nov 2016
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AC2: 'RC2 comment replies', D.V. Phanikumar, 17 Nov 2016
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RC3: 'Review Comments', Anonymous Referee #3, 06 Oct 2016
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AC4: 'RC3 comment replies', D.V. Phanikumar, 17 Nov 2016
K. K. Shukla et al.
K. K. Shukla et al.
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