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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">Dear Colleagues,</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">I would like to draw your attention to the Symposium 2.2 ”Solar Influence on the Atmosphere
and Climate" at the upcoming virtual IAGA-IASPEI conference held on</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">2-27 August 2021 (</span></font><a href="http://iaga-iaspei-india2021.in/symposia-details.html">
<font face="Arial" size="2"><span style=" font-size:10pt">http://iaga-iaspei-india2021.in/symposia-details.html</span></font></a><font face="Arial" size="2">
<span style=" font-size:10pt">).</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">The Symposium abstract is given below. The deadline for abstract submission is 15 April,
2021. Abstracts can be submitted at: </span></font><a href="http://iaga-iaspei-india2021.in/abstract.html"><font face="Arial" size="2">
<span style=" font-size:10pt">http://iaga-iaspei-india2021.in/abstract.html</span></font></a><font face="Arial" size="2"><span style=" font-size:10pt">. We are
looking forward to many interesting presentations, and to seeing you at the Assembly</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">Best regards</span></font></div>
<p style="margin-left:0mm; margin-right:0mm; text-indent:0mm; margin-top:0.00mm; margin-bottom:3.52mm;line-height: 115%; "><font face="Arial" size="2">
<span style=" font-size:10pt">Christoph Jacobi</span></font></p>
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<span style=" font-size:10pt"><br />
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<span style=" font-size:10pt">Solar influence on climate keeps attracting much interest presently. This includes in particular
the role of the Sun both in the past climate as in future climate variability as an important
aspect. State-of the art climate models include a well resolved stratosphere and mesosphere.
This allows the prediction of global climate and its changes, taking into account expected
solar related variability at short to long time scales.</span></font></p>
<p style="margin-left:0mm; margin-right:0mm; text-indent:0mm; margin-top:0.00mm; margin-bottom:3.52mm;line-height: 115%; "><font face="Arial" size="2">
<span style=" font-size:10pt">In the middle and upper atmosphere solar related electromagnetic and particle variability is
one dominant forcing mechanism for atmospheric variability at time scales from days to
decades. From available datasets it is not always straightforward to distinguish between solar
and meteorological influences. Time series are often too short to clearly identify, e.g., the 11-
and 22- year solar cycles in the presence of nonlinear trends owing to lower atmospheric
variability. The effect of planetary waves at time scales of days to weeks is difficult to extract
from time series in the presence of the solar rotation effect and harmonics.</span></font></p>
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<span style=" font-size:10pt">Results from observations, including observation and modeling solar forcing, theoretical work
and modeling efforts to quantify meteorological and solar effects on the lower, middle, and
upper atmosphere are welcome. Reports on progress in reconstructing past climate and
future climate projections and the role of extraterrestrial forcing in these are desired. </span></font></p>
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</span></font></div>
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</span></font></div>
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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">-- </span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">Prof. Dr. Christoph Jacobi</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">Universität Leipzig, Institute for Meteorology</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">Stephanstr. 3 </span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">D-04103 Leipzig</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">+49 341 97 32876</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">https://home.uni-leipzig.de/jacobi</span></font></div>
<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">jacobi@uni-leipzig.de</span></font></div>
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