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Earth System Science Data The Data Publishing Journal
https://doi.org/10.5194/essd-2018-48
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Review article
17 Apr 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Science Data (ESSD).
25 years of Cloud Base Height Measurements by Ceilometer in Ny Ålesund, Svalbard
Marion Maturilli1 and Kerstin Ebell2 1Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, 14473 Germany
2Institute for Geophysics and Meteorology, University of Cologne, 50969 Cologne, Germany
Abstract. Clouds are a key factor for the Arctic Amplification of global warming, but their actual appearance and distribution is still afflicted with large uncertainty. On the Arctic wide scale, large discrepancies are found between the various reanalyses and satellite products, respectively. Although ground-based observations by remote sensing are limited to point measurements, they have the advantage to obtain extended time series of vertically resolved cloud properties. Here, we present a 25-year data record of cloud base height measured by ceilometer at the Arctic site Ny-Ålesund, Svalbard. Linked to cyclonic activity, the cloud base height provides essential information for the interpretation of the surface radiation balance and contributes to the understanding meteorological processes. Furthermore, it is a useful auxiliary component for the analysis of advanced technologies that provide insight to cloud microphysical properties, like the cloud radar. The long-term time series also allows deriving an annual cycle of the cloud occurrence frequency, revealing the more frequent cloud cover in summer and the lowest cloud cover amount in April. However, as the use of different ceilometer instruments over the years potentially imposed inhomogeneities to the data record, any long-term trend analysis should be avoided.

The Ny-Ålesund cloud base height data from August 1992 to July 2017 are provided in high temporal resolution of 5 minutes (1 minute) before (after) July 1998, respectively, at the PANGAEA repository (https://doi.org/10.1594/PANGAEA.880300).

Citation: Maturilli, M. and Ebell, K.: 25 years of Cloud Base Height Measurements by Ceilometer in Ny Ålesund, Svalbard, Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2018-48, in review, 2018.
Marion Maturilli and Kerstin Ebell
Marion Maturilli and Kerstin Ebell

Data sets

Ceilometer cloud base height from station Ny-Ålesund from August 1992 to July 2017, reference list of 290 datasets M. Maturilli and A. Herber https://doi.org/10.1594/PANGAEA.880300
Marion Maturilli and Kerstin Ebell

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We present a 25-year data record of cloud base height measured by ceilometer at the Arctic site Ny-Ålesund, Svalbard. The long-term time series allows deriving an annual cycle of the cloud occurrence frequency, revealing the more frequent cloud cover in summer and the lowest cloud cover amount in April. The cloud base data further provide essential information for the interpretation of the surface radiation balance and contribute to the understanding meteorological processes in high latitudes.
We present a 25-year data record of cloud base height measured by ceilometer at the Arctic site...
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