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<article language="en">
	<journal>
		<journal_title>Atmospheric Chemistry and Physics Discussions</journal_title>
		<journal_url>www.atmos-chem-phys-discuss.net</journal_url>
		<issn>1680-7367</issn>
		<eissn>1680-7375</eissn>
		<volume_number>7</volume_number>
		<issue_number>3</issue_number>
		<publication_year>2007</publication_year>
	</journal>
	<doi>10.5194/acpd-7-8333-2007</doi>
	<article_url>http://www.atmos-chem-phys-discuss.net/7/8333/2007/</article_url>
	<abstract_html>http://www.atmos-chem-phys-discuss.net/7/8333/2007/acpd-7-8333-2007.html</abstract_html>
	<fulltext_pdf>http://www.atmos-chem-phys-discuss.net/7/8333/2007/acpd-7-8333-2007.pdf</fulltext_pdf>
	<start_page>8333</start_page>
	<end_page>8360</end_page>
	<publication_date>2007-06-14</publication_date>
	<article_title content_type="html">Long-time global radiation for Central Europe derived from ISCCP Dx data</article_title>
	<authors>
		<author numeration="1" affiliations="1">
			<name>N. Petrenz</name>
			<email>nadja.petrenz@forst.tu-dresden.de</email>
		</author>
		<author numeration="2" affiliations="1">
			<name>M. Sommer</name>
		</author>
		<author numeration="3" affiliations="1,2">
			<name>F. H. Berger</name>
		</author>
	</authors>
	<affiliations>
		<affiliation numeration="1" content_type="html">TU Dresden, Institute of Hydrology and Meteorology, Department of Meteorology, 01062 Dresden, Germany</affiliation>
		<affiliation numeration="2" content_type="html">German Meteorological Service, Meteorological Observatory Lindenberg (FE LG), 15848 Tauche/Lindenberg, Germany</affiliation>
	</affiliations>
	<abstract content_type="html">The global Dx dataset of the &quot;International Satellite Cloud Climatology Project&quot;
(ISCCP) with a spatial resolution of about 30&amp;times;30 km&lt;sup&gt;2&lt;/sup&gt;
was analysed to produce spatially highly resolved long-time
datasets to describe the radiation budget for Central Europe over the period
of 1984&amp;ndash;2000. The computation of shortwave and longwave radiant flux
densities at top of atmosphere and at surface was based on 1-D radiative
transfer simulations. The simulations were carried out for all relevant
atmospheric and surface conditions and the results were inserted into a
look-up table. Thus, long-time calculations for all conditions and time
slices of the Dx dataset could be realised. The study is focussed on the
global radiation at surface.
&lt;br&gt;&lt;br&gt;
The first examination was carried out for the ISCCP D1 and the ISCCP D2
dataset. These datasets, including cloud and surface information on a
different spatial scale (280&amp;times;280 km&lt;sup&gt;2&lt;/sup&gt;), were applied to the produced
look-up table analogue to the Dx data. The calculated global radiation of
the D1 and D2 dataset were compared to the Dx dataset. The differences
between these datasets mainly range from 5&amp;ndash;15 W m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; (2&amp;ndash;6%)
with regional peaks up to 25 W m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; (10%).
&lt;br&gt;&lt;br&gt;
The evaluation with the GEWEX &quot;Surface Radiation Budget&quot; (SRB) data emphasises differ-ences
between 5&amp;ndash;25 W m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; (6&amp;ndash;16%) over land areas. Deviations to an ISCCP
provided flux data set vary from 0 W m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; in the North up to 35 W m&lt;sup&gt;&amp;minus;2&lt;/sup&gt;
(0&amp;ndash;13%) in the South of Central Europe.
&lt;br&gt;&lt;br&gt;
The global radiation datasets provided by the &quot;Global Energy Balance Archive&quot; (GEBA)
and the &quot;German Meteorological Service&quot; (DWD) agree
well, but they are 5&amp;ndash;25 W m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; (7&amp;ndash;10%) lower than the Dx
results.
&lt;br&gt;&lt;br&gt;
Annual analyses of global radiation of various regional climate models
complete the study. It is figured out that the used models and methods
reveal a couple of discrepancies. Especially in wintertime the results of
our analysis differ to the considered models. Principally the uncer-tainties
were caused by the determined range of values and simplifications for the
computation of the radiative transfer simulation.</abstract>
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</article>

