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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText>Dear Colleagues,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>We invite you to attend the Workshop “Geospace Empirical Models” on Thursday, June 23, 1:30-3:30 PM, in the Peralta/Lamy rooms of the Santa Fe Convention Center. <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Workshop Description:<o:p></o:p></p><p class=MsoPlainText>Empirical models, which usually incorporate key physical constraints, provide several critical functions in geospace science and space weather. Scientifically, they represent the climate of the geospace system, where climate is defined as the mean response of an environmental system to external and internal forcing, including short-term forcing. Empirical models’ encapsulation of the observational record of the geospace system provides insight into the physical mechanisms underlying the system’s response and serves as a stringent benchmark for validating first-principles models. Empirical models are widely used for space weather prediction, initial and boundary conditions, a priori estimation for measurement retrieval, and background conditions for wave propagation. This workshop will provide tutorials on major empirical models that are used in the geospace community, including NRLMSIS, HWM, IRI, and the Weimer high-latitude electrodynamics model. Each model’s formulation and physics, assimilated data, recent development, operation, and limitations will be discussed. Abstracts and more details on the workshop may be found at <a href="http://cedarweb.vsp.ucar.edu/wiki/index.php/2016_Workshop:Geospace_Empirical_Models#Justification_for_the_workshop">http://cedarweb.vsp.ucar.edu/wiki/index.php/2016_Workshop:Geospace_Empirical_Models#Justification_for_the_workshop</a>. <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Agenda:<o:p></o:p></p><p class=MsoPlainText>Time Speaker Title<o:p></o:p></p><p class=MsoPlainText>1330 John Emmert Overview: 3 Myths about empirical models<o:p></o:p></p><p class=MsoPlainText>1335 Stefan Maus International Geomagnetic Reference Field (IGRF)<o:p></o:p></p><p class=MsoPlainText>1352 John Emmert NRLMSIS Atmosphere Temperature and Composition Model <o:p></o:p></p><p class=MsoPlainText>1407 Jens Oberheide Climatological Tidal Model of the Thermosphere (CTMT) <o:p></o:p></p><p class=MsoPlainText>1424 Doug Drob Horizontal Wind Model (HWM)<o:p></o:p></p><p class=MsoPlainText>1439 Dieter Bilitza International Reference Ionosphere (IRI)<o:p></o:p></p><p class=MsoPlainText>1456 Dan Weimer High-latitude electric field and current models <o:p></o:p></p><p class=MsoPlainText>1513 Paul O'Brien AE-9/AP-9 Radiation belt models<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Looking forward to seeing you in Santa Fe!<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Best Regards from the conveners,<o:p></o:p></p><p class=MsoPlainText>John Emmert (john.emmert@nrl.navy.mil)<o:p></o:p></p><p class=MsoPlainText>Dan Weimer (dweimer@vt.edu)<o:p></o:p></p><p class=MsoPlainText>Dieter Bilitza (dbilitza@gmu.edu)<o:p></o:p></p></div></body></html>