<div dir="ltr"><p style="margin:0in;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)">This Topical Issue arises from the virtual European Geophysical Union General Assembly (vEGU21) held in April 2021, primarily from the Session ST3.3 entitled "<a href="https://meetingorganizer.copernicus.org/EGU21/session/40166" target="_blank"><span style="color:rgb(192,23,0);border:1pt none windowtext;padding:0in">Towards better understanding of the ionospheric plasma irregularities and scintillations</span></a>". However, it is not reserved to papers presented during this session and is open for all submissions within the scope.<u></u><u></u></span></p><p style="margin-right:0in;margin-bottom:12pt;margin-left:0in;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)">Plasma density irregularities can occur at all latitudes in the Earth's ionosphere. However, the onset and evolution of these irregularities as well as their influence on the radio wave signals continue to be unsolved scientific questions. The various proposed generation mechanisms, including instability growth rates and seeding processes, are strongly coupled to the neutral atmosphere and magnetospheric dynamics, making the forecasting of ionospheric irregularities much more challenging. Recent observations from ground- and space-based measurements, as well as new innovative data analysis and modeling techniques, e.g., data assimilation and machine learning, have the potential to advance our understanding of the ionospheric irregularities. Studies that focus on the observation, modeling and prediction of ionospheric plasma irregularities of different scales are welcome to be submitted to this topical issue in Journal of Space Weather and Space Climate (JSWSC). The mitigation of negative effects and recent developments to forecast scintillation effects on Global Navigation Satellite or other communication systems are also of high interest.<u></u><u></u></span></p><p style="margin:0in;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)">Manuscripts must be submitted via the JSWSC online submission tool. Guidelines for submission of papers are found on the JSWSC web site under the tab "<a href="https://www.swsc-journal.org/author-information/instructions-for-authors" target="_blank"><span style="color:rgb(192,23,0);border:1pt none windowtext;padding:0in">Instruction for Authors</span></a>".<u></u><u></u></span></p><p style="margin:0in;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)"><u></u> <u></u></span></p><p style="margin:0in;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><strong><i><u><span style="font-family:Arial,sans-serif;color:rgb(51,51,51);border:1pt none windowtext;padding:0in">Deadline: 30 November 2021</span></u></i></strong><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)"><u></u><u></u></span></p><p style="margin-right:0in;margin-bottom:12pt;margin-left:0in;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)">All manuscripts will be peer reviewed according to the quality standards of international scientific journals. The type of contributions must fit the style of JSWSC. All manuscripts should contain enough new insight, present the results against a properly referenced background of existing work, and present adequate evidence that supports the conclusions. Accepted papers are published in electronic format only, and are freely available to everyone via the JSWSC website. JSWSC offers the possibility to include electronic material, such as animations, movies, codes and data.<u></u><u></u></span></p><p style="margin:0in;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)">The Topical Editor-in-Chief (T-EiC) for this TI is <a href="mailto:xiongchao@whu.edu.cn" target="_blank"><span style="color:rgb(192,23,0);border:1pt none windowtext;padding:0in">Chao Xiong</span></a> from the Wuhan University, Wuhan, China. He will be joined by 4 Topical Editors (TE):<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:60pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><u></u><span style="font-size:10pt;font-family:Symbol;color:rgb(51,51,51)">·<span style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:7pt;line-height:normal;font-family:"Times New Roman"">         </span></span><u></u><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)">Lucilla Alfonsi, Istituto Nazionale di Geofisica e Vulcanologia (INGV), Roma, Italy<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:60pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><u></u><span style="font-size:10pt;font-family:Symbol;color:rgb(51,51,51)">·<span style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:7pt;line-height:normal;font-family:"Times New Roman"">         </span></span><u></u><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)">Jens Berdermann, German Aerospace Center (DLR), Neustrelitz, Germany<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:60pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><u></u><span style="font-size:10pt;font-family:Symbol;color:rgb(51,51,51)">·<span style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:7pt;line-height:normal;font-family:"Times New Roman"">         </span></span><u></u><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)">Yaqi Jin, University of Oslo, Oslo, Norway<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:60pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><u></u><span style="font-size:10pt;font-family:Symbol;color:rgb(51,51,51)">·<span style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:7pt;line-height:normal;font-family:"Times New Roman"">         </span></span><u></u><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)">Jeffrey Klenzing, NASA Goddard Space Flight Center, Greenbelt, MD, USA<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:60pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)"><u></u> <u></u></span></p><p style="margin:0in;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-family:Arial,sans-serif;color:rgb(51,51,51)">For questions regarding this Topical Issue, please, contact the <a href="mailto:xiongchao@whu.edu.cn" target="_blank"><span style="color:rgb(192,23,0);border:1pt none windowtext;padding:0in">T-EiC</span></a>. For questions concerning the submission process the <a href="mailto:jswsc@edpsciences.org" target="_blank"><span style="color:rgb(192,23,0);border:1pt none windowtext;padding:0in">Editorial Office</span></a> should be contacted.<u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Full Announcement at: <a href="https://www.swsc-journal.org/topical-issues-open-for-submission" target="_blank">https://www.swsc-journal.org/topical-issues-open-for-submission</a></p><div><br></div>-</div>