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<p class="xmsonormal" style="margin:0in"><span style="color:black">Dear Colleagues,</span><span style="font-size:13.5pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<span style="color:black">We would like to invite you to submit an abstract to the “Observational and modeling studies of ionospheric irregularities and scintillation” Session at the 2022 Fall AGU Meeting. The focus of our session is on observational and modeling
studies that advance our understanding of the role of various mechanisms and processes for generation of ionosphere irregularities and their propagation impacts.</span><span style="font-size:13.5pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<b><span style="color:black">Session Title:<span class="apple-converted-space"> </span><a href="https://agu.confex.com/agu/fm22/prelim.cgi/Session/157275" title="https://agu.confex.com/agu/fm22/prelim.cgi/Session/157275"><span style="color:#0563C1">SA017 -
Observational and modeling studies of ionospheric irregularities and scintillation</span></a></span></b><span style="font-size:13.5pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<b><span style="color:black">Session Description:</span></b><span class="apple-converted-space"><b><span style="color:black"> </span></b></span><span style="color:black">Ionospheric irregularities are the main source of scintillation defined as rapid random
fluctuations in the amplitude and phase of radio signals that adversely affect transionospheric communication and navigation systems, such as Global Navigation Satellite Systems (GNSS). Scintillations are the most severe at magnetic low- and high-latitudes
which are conducive to instability mechanisms pertaining to the magnetic field orientation. These irregularities with characteristic scales of the order of several hundred meters to a few kilometers in conjunction with larger scale density perturbations impact
radio and radar systems relying on the ionospheric reflections including VLF and HF communications and Over the Horizon Radars (OTHR). The generation mechanisms producing these ionospheric density irregularities are controlled by the background density, electric
fields, plasma drift, neutral winds and particle precipitation. Understanding the state of the system controlling the instability onset, turbulence development and saturation are paramount for the forecasting and mitigation strategies. In this session, we
invite both modeling and remote and in situ observational studies pertinent to advancing our understanding of the role of various mechanisms and processes for generation of ionosphere irregularities and their propagation impacts including scintillation, bending
and range delays.</span><span style="font-size:13.5pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<span style="color:black"> </span><span style="font-size:13.5pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<span style="color:black">The abstract submission deadline is</span><span class="apple-converted-space"><span style="color:black"> </span></span><b><span style="color:black">Aug. 3, 2022.</span></b><span style="font-size:13.5pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<span style="color:black">If you have any questions, please do not hesitate to contact us. We look forward to meeting you at 2022 Fall AGU meeting. </span><span style="font-size:13.5pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<span style="color:black">Sincerely,</span><span style="font-size:13.5pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<span style="color:black">Romina Nikoukar, Sebastijan Mrak, Anton Kashcheyev, Matthew Zettergren</span><span style="font-size:13.5pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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