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SUMMARY:The global energy budget: from models to observations
DTSTART:20260629T090000Z
DTEND:20260629T100000Z
DTSTAMP:20260525T060100Z
UID:indico-event-1060@events.geomar.de
DESCRIPTION:Speaker: Senne Van Loon\, Department of Atmospheric Science\, 
 Colorado State University\, USA\nHybrid  -  online via \nhttps://geomar
 .webex.com/geomar-en/j.php?MTID=ma73a9dd4db0f5cb6275b471e1c5e6005\nMeeting
  number: Password:\nAbstract:The radiation budget of the Earth is simultan
 eously modified by the effective radiative forcing and the radiative respo
 nse to the forcing. Only the (im)balance between incoming and outgoing rad
 iation can be observed. Therefore\, we traditionally rely on climate model
 s to estimate the contribution of forcing (e.g.\, emissions of greenhouse 
 gases or volcanic eruptions) versus feedback (e.g.\, the radiative respons
 e to surface warming). Climate models come with biases and assumptions of 
 cloud processes that are not understood well yet\, so we want to make opti
 mal use of observations to investigate the global energy budget. To do so\
 , we utilize (explainable) artificial intelligence that can bridge the gap
  from models to observations. These approaches range from simple surrogate
 s that estimate the global-mean radiative response to local surface temper
 ature perturbations\, to climate emulators that replicate the Earth's atmo
 sphere based on reanalysis data. We use these methods to estimate observat
 ion-based historical feedback and forcing and to investigate large-scale d
 ynamical mechanisms influencing cloud feedbacks. We find that the global r
 adiative feedback parameter had a minimum around 1982-2011 and has since b
 een trending towards a less stable climate. Moreover\, we predict an effec
 tive radiative forcing trend of 0.73±0.22 Wm-2 per decade for 2001-2025. 
 Finally\, we quantify how the stability of subtropical marine low clouds i
 s influenced by sea surface temperature patterns and find both tropical an
 d extratropical pathways to be important.\n \n\nhttps://events.geomar.de/
 event/1060/
LOCATION:5-1.214 - PAZIFIK / PACIFIC- Rechte Seite - Großer\, unterteilba
 rer Konferenzraum (GEOMAR - Standort Ostufer  / GEOMAR - East Shore)
URL:https://events.geomar.de/event/1060/
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