{"674412":{"#nid":"674412","#data":{"type":"event","title":"EAS Spring 2024 Seminar Series - The differences between \u201c1=1\u201d and \u201c3=3\u201d: Energy gain kernel for climate feedbacks. ","body":[{"value":"\u003Cp\u003ESpeaker: Dr. Ming Cai\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAffiliation: Florida State University\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWe here introduce a climate feedback kernel, referred to as the \u201cenergy gain kernel\u201d (EGK). EGK allows for separating the net longwave radiative energy perturbations given by a Planck feedback matrix explicitly into thermal energy emission perturbations of individual layers, and thermal radiative energy flux convergence perturbations at individual layers resulting from the coupled atmosphere-surface temperature changes in response to the unit forcing in individual layers. The former is represented by the diagonal matrix of a Planck feedback matrix and the latter by EGK. Elements of EGK are all positive, representing amplified energy perturbations at a layer where forcing is imposed and energy gained at other layers, both of which are achieved through radiative thermal coupling within an atmosphere-surface column.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EApplying EGK to input energy perturbations, whether external or internal due to responses of non-temperature feedback processes to external energy perturbations, such as water vapor and albedo feedbacks, yields their total energy perturbations amplified through radiative thermal coupling within an atmosphere-surface column.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAs the strength of EGK depends exclusively on climate mean states, it offers a solution for effectively and objectively separating control climate state information from climate perturbations for climate feedback studies. Given that an EGK comprises critical climate mean state information on mean temperature, water vapor, clouds, and surface pressure, we envision that the diversity of EGK across different climate models could provide insight into the inquiry of why, under the same anthropogenic greenhouse gas increase scenario, different models yield varying degrees of global mean surface warming.\u003C\/p\u003E\r\n","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ESpeaker: Dr. Ming Cai\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAffiliation: Florida State University\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAbstract:\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe here introduce a climate feedback kernel, referred to as the \u201cenergy gain kernel\u201d (EGK). EGK allows for separating the net longwave radiative energy perturbations given by a Planck feedback matrix explicitly into thermal energy emission perturbations of individual layers, and thermal radiative energy flux convergence perturbations at individual layers resulting from the coupled atmosphere-surface temperature changes in response to the unit forcing in individual layers. The former is represented by the diagonal matrix of a Planck feedback matrix and the latter by EGK. Elements of EGK are all positive, representing amplified energy perturbations at a layer where forcing is imposed and energy gained at other layers, both of which are achieved through radiative thermal coupling within an atmosphere-surface column.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nApplying EGK to input energy perturbations, whether external or internal due to responses of non-temperature feedback processes to external energy perturbations, such as water vapor and albedo feedbacks, yields their total energy perturbations amplified through radiative thermal coupling within an atmosphere-surface column.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAs the strength of EGK depends exclusively on climate mean states, it offers a solution for effectively and objectively separating control climate state information from climate perturbations for climate feedback studies. Given that an EGK comprises critical climate mean state information on mean temperature, water vapor, clouds, and surface pressure, we envision that the diversity of EGK across different climate models could provide insight into the inquiry of why, under the same anthropogenic greenhouse gas increase scenario, different models yield varying degrees of global mean surface warming.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"The differences between \u201c1=1\u201d and \u201c3=3\u201d: Energy gain kernel for climate feedbacks. "}],"uid":"34732","created_gmt":"2024-04-26 16:55:32","changed_gmt":"2024-04-26 16:59:52","author":"cos-websu3","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2024-05-02T11:00:00-04:00","event_time_end":"2024-05-02T12:00:00-04:00","event_time_end_last":"2024-05-02T12:00:00-04:00","gmt_time_start":"2024-05-02 15:00:00","gmt_time_end":"2024-05-02 16:00:00","gmt_time_end_last":"2024-05-02 16:00:00","rrule":null,"timezone":"America\/New_York"},"location":"In-person Seminar \u2013 Ford ES\u0026T L1205 ","extras":[],"hg_media":{"673870":{"id":"673870","type":"image","title":"Screenshot 2024-04-26 112925.png","body":null,"created":"1714150680","gmt_created":"2024-04-26 16:58:00","changed":"1714150680","gmt_changed":"2024-04-26 16:58:00","alt":"picture of Dr. Ming Cai","file":{"fid":"257323","name":"Screenshot 2024-04-26 112925.png","image_path":"\/sites\/default\/files\/2024\/04\/26\/Screenshot%202024-04-26%20112925.png","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/2024\/04\/26\/Screenshot%202024-04-26%20112925.png","mime":"image\/png","size":224149,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/2024\/04\/26\/Screenshot%202024-04-26%20112925.png?itok=w18fgUDg"}}},"media_ids":["673870"],"groups":[{"id":"364801","name":"School of Earth and Atmospheric Sciences (EAS)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}