<div dir="ltr"><p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span lang="EN-GB">Dear
Colleagues,</span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span lang="EN-GB">The
upcoming EGU Assembly in Vienna (7-12 April 2019) hosts the session <b>ST3.2 "Forcing of
ionosphere/thermosphere from below: observations and modelling
perspectives".</b> We would like to invite you to present your research at
the session. </span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span lang="EN-GB">Please
follow the link to submit your abstracts (the deadline for abstracts is January
10^th, 2019):</span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span class="gmail-MsoHyperlink" style="color:rgb(5,99,193);text-decoration-line:underline"><span lang="EN-GB"><a href="https://meetingorganizer.copernicus.org/egu2019/sessionprogramme" style="color:rgb(5,99,193)">https://meetingorganizer.copernicus.org/egu2019/sessionprogramme</a></span></span><span lang="EN-GB"></span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><i><span lang="EN-GB">Session description:</span></i></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><i><span lang="EN-GB">Various types of atmospheric waves, including
gravity waves, tides, and planetary waves, transport energy and momentum
upwards, coupling lower and middle atmosphere dynamics to the thermosphere and
ionosphere. Global modelling studies, supported by ground-based and satellite
observations, are necessary to quantify the mechanisms of the forcing from
below. Understanding these mechanisms is additionally important for the
predictability of ionospheric space weather. This session welcomes
contributions from observational and modelling studies of the vertical and
latitudinal coupling processes that lead to ionosphere/thermosphere variability
due to forcing from the lower atmosphere. Coupling by gravity waves, tides,
planetary waves, effects of sudden stratospheric warmings, and connections to
ionospheric space weather phenomena are of particular interest.</span></i></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span lang="EN-GB"> </span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span lang="EN-GB">With best
regards,</span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span lang="EN-GB">Jorge L. Chau, Nick Pedatella, Dimitry Pokhotelov,
Claudia Stolle</span></p><p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">Session Conveners</p></div>