Greifswald 2024 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 1: Near-Earth Space and Space Weather
EP 1.4: Vortrag
Montag, 26. Februar 2024, 15:40–16:00, ELP 1: HS 1.22
EPP-climate link by reactive nitrogen polar winter descent revisited: MIPAS v8 reprocessing and future benefits by the EE11 candidate mission CAIRT — •S. Bender1, B. Funke1, M. López Puertas1, M. Garcia-Comas1, T. von Clarmann2, M. Höpfner2, B.-M. Sinnhuber2, M. Sinnhuber2, Q. Errera3, G. Poli4, and J. Ungermann5 — 1IAA-CSIC, Spain — 2KIT, Germany — 3BIRA, Belgium — 4IAP "Nello Carrara", Italy — 5FZJ, Germany
Polar winter descent of NOy produced by energetic particle precipitation (EPP) in the mesosphere and lower thermosphere affects polar stratospheric ozone by catalytic reactions. This, in turn, may affect regional climate via radiative and dynamical feedbacks. NOy observations by MIPAS/Envisat during 2002–2012 have provided observational constraints on the solar-activity modulated variability of stratospheric EPP-NOy. These constraints have been used to formulate a chemical upper boundary condition (UBC) for climate models in the context of solar forcing recommendations for CMIP6. Recently, a reprocessed MIPAS version 8 dataset has been released. We assess how the changes in this new data version impact the EPP-NOy quantification and the formulation of the UBC.
ESA’s Earth Explorer 11 candidate Changing Atmosphere Infra-Red Tomography (CAIRT) will observe the atmosphere from about 5 to 115 km with an across-track resolution of 30 to 50 km within a 500 km wide field of view. CAIRT will provide NOy and tracer observations with unprecedented spatial resolution. We assess its potential to advance our understanding of the EPP-climate link in the future.
Keywords: reactive nitrogen; mesosphere; lower thermosphere; winter descent; energetic particle precipitation