Universität zu Köln

Maturilli, Marion ORCID: 0000-0001-6818-7383 and Ebell, Kerstin ORCID: 0000-0002-0042-4968 (2018). Twenty-five years of cloud base height measurements by ceilometer in Ny-Alesund, Svalbard. Earth Syst. Sci. Data, 10 (3). S. 1451 - 1457. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1866-3516

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Abstract

Clouds are a key factor for the Arctic amplification of global warming, but their actual appearance and distribution are still afflicted by 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 of obtaining 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 Ny-Alesund, Svalbard, Arctic site. We explain the composition of the three sub-periods with different instrumentation contributing to the data set, and show examples of potential application areas. Linked to cyclonic activity, the cloud base height provides essential information for the interpretation of the surface radiation balance and contributes to the understanding of meteorological processes. Furthermore, it is a useful auxiliary component for the analysis of advanced technologies that provide insight into cloud microphysical properties, like the cloud radar. The long-term time series also allows derivation of 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 onto the data record, any long-term trend analysis should be avoided.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Maturilli, Marion UNSPECIFIED orcid.org/0000-0001-6818-7383 UNSPECIFIED Ebell, Kerstin UNSPECIFIED orcid.org/0000-0002-0042-4968 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-176516
DOI:	10.5194/essd-10-1451-2018
Journal or Publication Title:	Earth Syst. Sci. Data
Volume:	10
Number:	3
Page Range:	S. 1451 - 1457
Date:	2018
Publisher:	COPERNICUS GESELLSCHAFT MBH
Place of Publication:	GOTTINGEN
ISSN:	1866-3516
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Institute for Geophysics and Meteorology
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17651