PART I PROCEEDINGS OF THE GENERAL ASSEMBLY XXVII General Assembly of the International Union of Geodesy and Geophysics Officers of the Union, Associations, and Commissions for 2015-2019 OFFICERS OF THE UNION,ASSOCIATIONS, AND COMMISSIONS FOR 2015-2019 Bureau of the Union President: Michael G. Sideris CANADA Vice-President: Kathryn Whaler UNITED KINGDOM Secretary General: Alik Ismail-Zadeh RUSSIA/GERMANY Treasurer: Aksel W. Hansen DENMARK Members: Isabelle Ansorge SOUTH AFRICA Pierre Hubert FRANCE Chris Rizos AUSTRALIA Executive Committee of the Union According to Article 10 of the Statutes of IUGG the Executive Committee consists of: - the Bureau (see above), - the Retiring President of the Union, Harsh Gupta (INDIA) - the Presidents of the International Associations: IACS: Charles Fierz (2015-2017) SWITZERLAND Regine Hock (2017-2019) USA IAG: Harald Schuh GERMANY IAGA: Eduard Petrovsky CZECH REPUBLIC IAHS: Hubert Savenije (2015-2017) NETHERLANDS Günter Blöschl (2017-2019) AUSTRIA IAMAS: John Turner UNITED KINGDOM IAPSO: Denise Smythe-Wright UNITED KINGDOM IASPEI: Thorne Lay USA IAVCEI: Donald Dingwell GERMANY Finance Committee of the Union Chair: David Collins (2015-2016) UNITED KINGDOM Jan Krynski (2016-2019) POLAND Members: Nasser M. Abou Ashour EGYPT (2016-2019) Jan Krynski (2015-2016) POLAND Corina Risso ARGENTINA Virendra Tiwari INDIA Secretaries General of the International Associations IACS Andrew Macintosh NEW ZEALAND IAG: Hermann Drewes GERMANY IAGA: Mioara Mandea FRANCE IAHS: Christophe Cudennec FRANCE IAMAS: Teruyuki Nakajima JAPAN IAPSO: Stefania Sparnocchia ITALY IASPEI: Johannes Schweitzer NORWAY IAVCEI: Roberto Sulpizio ITALY Union Commissions Union Commission on Climatic and Environmental Change (CCEC): www.ccec-iugg.org Chair: Tom Beer AUSTRALIA Vice-Chair: Jianping Li CHINA Secretary-Treasurer: Keith Alverson USA/JAPAN 6 XXVII General Assembly of the International Union of Geodesy and Geophysics Officers of the Union, Associations, and Commissions for 2015-2019 Union Commission on Mathematical Geophysics (CMG): Chair: Yehuda Ben-Zion USA Vice-Chairs: Einat Aharonov ISRAEL Claudia Pasquero ITALY Secretary: Ilya Zaliapin USA Union Commission on Geophysical Risk and Sustainability (GRC): www.iugg-georisk.org Chair: John LaBrecque USA Vice-Chairs: Vyacheslav Gusiakov RUSSIA Alan Thomson UNITED KINGDOM Secretary/Treasurer: Paula Dunbar USA Union Commission on the Study of the Earth's Deep Interior (SEDI): www.sedigroup.org Chair: Jonathan Aurnou USA Vice-Chair: Christine Thomas GERMANY Secretary: Michael Bergman USA Union Commission on Data and Information (UCDI): www.iugg-ucdi.org Chair: Satheesh Shenoi INDIA Vice-Chair: Anatoly Soloviev RUSSIA Union Commission on Planetary Sciences (UCPS): http://202.127.29.4/geodesy/ucps/index.html Chair: Shuanggen Jin CHINA Vice-Chairs: Athena Coustenis FRANCE Jörn Helbert GERMANY Secretary/Treasurer: Scot Rafkin USA IUGG Working Group on History (WGH): Chair: Hans Volkert GERMANY Vice-Chair: Claude Boucher FRANCE Inter-Unions Commission Inter-Union Commission on the Lithosphere: The International Lithosphere program www.scl-ilp.org President: Hans Thybo NORWAY/TURKEY Secretary General: Magdalena Scheck-Wenderoth GERMANY Bureau Members: IUGG: Harsh Gupta INDIA IUGS: Christine Asch GERMANY Chair of National Members: Alessandro Tibaldi ITALY Executive Secretary: Alexander Rudloff GERMANY IUGG Liaison Officers with Intergovernmental Organizations The United Nations Geospatial Information Section: Hermann Drewes GERMANY Consultative Committee for Time and Frquency (CCTF): Richard Biancale FRANCE Claude Boucher FRANCE Group on Earth Observations (GEO): Alik Ismail-Zadeh GERMANY/RUSSIA Claude Boucher FRANCE Mioara Mandea FRANCE 7 XXVII General Assembly of the International Union of Geodesy and Geophysics Officers of the Union, Associations, and Commissions for 2015-2019 Peter Fox USA Richard Gross USA Göran Ekström USA International Civil Aviation Organization (ICAO): John Eichelberger USA Arnau Folch SPAIN Pan-American Institute of Geography and History (PAIGH): Laura Sanchez GERMANY/ COLOMBIA United Nations Educational, Scientific and Cultural Organization (UNESCO) International Hydrological Programme (IHP): Christophe Cudennec FRANCE Georg Kaser AUSTRIA International Oceanographic Commission (IOC): Stefania Sparnocchia ITALY Eugene G. Morozov RUSSIA World Meteorological Organization (WMO): Arthur Askew SWITZERLAND Christophe Cudennec FRANCE Xiao Cunde CHINA Arnau Folch SPAIN Joyce E. Penner USA Alan Thomson UNITED KINGDOM Partner Advisory Committee (PAC) of the Global Roger Pulwarty USA Framework for Climate Services (GFCS): IUGG Representatives on ICSU/ISC Committees and Regional Offices Committee on Data for Science and Technology (CODATA): Alexei Gvishiani RUSSIA Bernd Richter GERMANY Committee on Space Research (COSPAR): Andrew W. Yau CANADA Geoffrey Blewitt USA Programme on Integrated Research on Disaster Risk (IRDR): Harsh Gupta INDIA Scientific Committee on Antarctic Research (SCAR): Ian Allison AUSTRALIA John Turner UNITED KINGDOM Scientific Committee on Oceanic Research (SCOR): Denise Smythe-Wright UNITED KINGDOM John Turner UNITED KINGDOM Scientific Committee on Solar-Terrestrial Physics Vladimir Kuznetsov RUSSIA (SCOSTEP): World Climate Research Programme (WCRP): Tom Beer AUSTRALIA Richard Essery UNITED KINGDOM World Data System (WDS): Aude Chambodut FRANCE Ruth E. Neilan USA Regional Office for Africa (ROA): Isabelle Ansorge SOUTH AFRICA Regional Office for Asia & the Pacific (ROAP): Sukanta Roy INDIA Regional Office for Latin America and the Caribbean Jaime U. Fucugauchi MEXICO (ROLAC): 8 XXVII General Assembly of the International Union of Geodesy and Geophysics Officers of the Union, Associations, and Commissions for 2015-2019 IUGG Secretariat GFZ German Research Centre for Geosciences Telegrafenberg A17 14473 Potsdam GERMANY Executive Secretary: Franz Kuglitsch GERMANY Assistant Executive Secretary: Katrin Gundrum GERMANY 9 XXVII General Assembly of the International Union of Geodesy and Geophysics Report of the Chair of the Local Organizing Committee IUGG 2019 LOCAL ORGANIZING COMMITTEE Chair: Dr. Fiona DARBYSHIRE Université du Québec à Montréal CANADA T: +1-514-987-3000 x 5054 [email protected] Deputy Chair: Dr. Lawrence MYSAK McGill University CANADA T: +1-514-398-3768 [email protected] Secretary: Dr. Laxmi SUSHAMA McGill University CANADA T: +1-514-398-5993 [email protected] Sponsorship and Funding: Dr. Francesco S.R. PAUSATA Université du Québec à Montréal CANADA T: +1-514-987-3000 x 3387 [email protected] Sponsorship and Exhibitors: Dr. Brian BRANFIREUN University of Western Ontario CANADA T: +1-519-661-2111 x 89221 [email protected] Fieldtrips and Workshops: Dr. Kim BERLO McGill University CANADA T: +1-514-398-5884 [email protected] Fieldtrips and Workshops: Dr. Yajing LIU McGill University CANADA T: +1-514-398-4085 [email protected] Media and Communications: Dr. Randy SCHARIEN University of Victoria CANADA T: +1-250-853-3577 [email protected] CGU Liaison: Dr. Georgia FOTOPOULOS Queen’s University, CANADA T: +1-613-533-6639 [email protected] 10 XXVII General Assembly of the International Union of Geodesy and Geophysics Report of the Chair of the Local Organizing Committee CMOS Liaison: Dr. Dominique PAQUIN Ouranos research centre CANADA T: +1-514-282-6464 x 261 [email protected] Government Scientists’ Liaison: Dr. David BOTELER Geomagnetic Laboratory, Natural Resources Canada CANADA T: +1-613-837-2035 [email protected] Volunteer Coordinator: Dr. Émilie BRESSON Université du Québec en Abitibi-Témiscamigue CANADA T: +1-514-282-6464 x 339 [email protected] Member at Large: Sandrine SOLIGNAC Université du Québec à Montréal CANADA T: +1-514-987-3000 x 3328 [email protected] IUGG 2019 LOCAL PROFESSIONAL CONFERENCE ORGANISER JPdL International 1555 rue Peel, Suite 500 Montréal, QC, H3A 3L8 CANADA www.jpdl.com Ms. Adriana BONACCI, Project Manager Ms. Laure DURAND, Logistics Coordinator Mr. Sylvain Barbeau, Logistics Coordinator Ms. Josée DALLAIRE, Exhibit and Sponsorship Coordinator Ms. Catherine VALLE, Registration and Housing Manager Ms. Claire CALSINA, Staffing Coordinator Mr. Alain CARBONNEAU, Director of Sales Ms. Marie-Josée TALARICO, Operations Director Mr. Jean-Paul DE LAVISON, President 11 XXVII General Assembly of the International Union of Geodesy and Geophysics Report of the Chair of the Local Organizing Committee REPORT OF THE CHAIR OF THE LOCAL ORGANIZING COMMITTEE FIONA DARBYSHIRE The XXVIIth General Assembly of the IUGG was held in Montréal, Canada in from July 8 to 18, 2019, and was co-hosted by two Canadian societies whose research interests overlap with those of IUGG: ௅ Canadian Geophysical Union (CGU; research themes corresponding to IACS, IAHS, IAG, IAGA, IASPEI, IAVCEI) ௅ Canadian Meterological and Oceanographic Society (CMOS; research themes corresponding to IAMAS, IAPSO) The two societies usually hold their own annual meetings, but they decided to join with the IUGG General Assembly for 2019, and they played an active role in the preparation and administration of the meeting. Overall, we had almost 4000 registrants, of whom over 800 were student delegates, with 95 different countries represented. The event attracted a good showing of conference exhibitors, with over 30 booths in place. We were able to obtain some government, academic and industry sponsorship, as well as significant support from the Palais des Congrès de Montréal (the conference venue) and from