%0 Journal Article
%A Löhnert, U.
%A Schween, J. H.
%A Acquistapace, C.
%A Ebell, K.
%A Maahn, M.
%A Barreraverdejo, M.
%A Hirsikko, A.
%A Bohn, B.
%A Knaps, A.
%A O'connor, E.
%A Simmer, C.
%A Wahner, A.
%A Crewell, S.
%T JOYCE: Juelich Observatory for Cloud Evolution
%J Bulletin of the American Meteorological Society
%V 96
%N 7
%@ 1520-0477
%C Boston, Mass.
%I ASM
%M FZJ-2015-00871
%P 1157–1174
%D 2014
%X The Jülich Observatory for Cloud Evolution (JOYCE), located at Forschungszentrum Jülich 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000359855000001
%R 10.1175/BAMS-D-14-00105.1
%U https://juser.fz-juelich.de/record/187197