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Dear Colleagues, We would like to invite you to submit abstracts to the AGU session T018 "Episodic behaviors in arc system: Patterns, feedbacks, driving mechanisms and implications" in the coming AGU fall meeting (December 14-18, 2015). The deadline of abstract submission is August 5, 2015. Session information can be found below or here : https://agu.confex.com/agu/fm15/preliminaryview.cgi/Session8627 Session ID#: 8627 Session Description: Recent advances in both the North and South American Cordilleran arc systems reveal long wavelength episodic behaviors, such as high volume magmatic addition events, episodes of deformation, and excursions of isotopic and geochemical signatures over the arc lifetime. The primary controls on these behaviors, however, remain poorly understood. Large geochronologic, geochemical, isotopic, geophysical, and field geology datasets suggest such episodic behaviors could result from cyclic processes active within the arc and/or external forcing from outside the arc. This session aims to address the questions mentioned above by contrasting temporal variations in different processes, depths, along or across arc strike, and in different arc systems. We invite contributions that provide evaluations and insights on the temporal behaviors of arc systems, continental or oceanic, through specific case studies or investigation of regional patterns. We particularly welcome contributions with multidisciplinary approaches that could link disparate arc processes active at different scales, depths, etc. Primary Convener: Wenrong Cao, University of Southern California, Los Angeles, CA, United States; Rice University, Houston, TX, United States Conveners: Emily J Chin, Brown Univeristy, Providence, RI, United States,Robinson Cecil, California State University Northridge, Northridge, CA, United States and Scott R Paterson, University of Southern California, Los Angeles, CA, United States Cross-Listed: DI - Study of the Earth's Deep Interior EP - Earth and Planetary Surface Processes G - Geodesy V - Volcanology, Geochemistry and Petrology Index Terms: 1020 Composition of the continental crust [GEOCHEMISTRY] 3619 Magma genesis and partial melting [MINERALOGY AND PETROLOGY] 8104 Continental margins: convergent [TECTONOPHYSICS] 8178 Tectonics and magmatism [TECTONOPHYSICS] best wishes, Wenrong ------------------------ Wenrong Cao Postdoctoral Research Associate Department of Earth Science, MS-126 Rice University, Houston, TX 77005