Universität zu Köln

Loehnert, U., Schween, J. H., Acquistapace, C., Ebell, K., Maahn, M., Barrera-Verdejo, M., Hirsikko, A., Bohn, B., Knaps, A., O'Connor, E., Simmer, C., Wahner, A. and Crewell, S. (2015). JOYCE Julich Observatory for Cloud Evolution. Bull. Amer. Meteorol. Soc., 96 (7). S. 1157 - 1175. BOSTON: AMER METEOROLOGICAL SOC. ISSN 1520-0477

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Abstract

The Julich Observatory for Cloud Evolution (JOYCE), located at Forschungszentrum Julich in the most western part of Germany, is a recently established platform for cloud research. The main objective of JOYCE is to provide observations, which improve our understanding of the cloudy boundary layer in a midlatitude environment. Continuous and temporally highly resolved measurements that are specifically suited to characterize the diurnal cycle of water vapor, stability, and turbulence in the lower troposphere are performed with a special focus on atmosphere-surface interaction. In addition, instruments are set up to measure the micro- and macrophysical properties of clouds in detail and how they interact with different boundary layer processes and the large-scale synoptic situation. For this, JOYCE is equipped with an array of state-of-the-art active and passive remote sensing and in situ instruments, which are briefly described in this scientific overview. As an example, a 24-h time series of the evolution of a typical cumulus cloud-topped boundary layer is analyzed with respect to stability, turbulence, and cloud properties. Additionally, we present longer-term statistics, which can be used to elucidate the diurnal cycle of water vapor, drizzle formation through autoconversion, and warm versus cold rain precipitation formation. Both case studies and long-term observations are important for improving the representation of clouds in climate and numerical weather prediction models.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Loehnert, U. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schween, J. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Acquistapace, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ebell, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maahn, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Barrera-Verdejo, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hirsikko, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bohn, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Knaps, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED O'Connor, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Simmer, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wahner, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Crewell, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-400199
DOI:	10.1175/BAMS-D-14-00105.1
Journal or Publication Title:	Bull. Amer. Meteorol. Soc.
Volume:	96
Number:	7
Page Range:	S. 1157 - 1175
Date:	2015
Publisher:	AMER METEOROLOGICAL SOC
Place of Publication:	BOSTON
ISSN:	1520-0477
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EMITTED RADIANCE INTERFEROMETER; LIQUID WATER PATH; MICROWAVE RADIOMETRY; BOUNDARY-LAYER; PART II; RETRIEVAL; AEROSOL; TEMPERATURE; MODELS; RADAR Multiple languages Meteorology & Atmospheric Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/40019