Stratospheric aerosol characteristics from SCIAMACHY limb observations and their evolution after volcanic eruptions
| Autor: | Pohl, Christine, Wrana, Felix, Niemeier, Ulrike, Rozanov, Alexei, Deshler, Terry, Burrows, John P. |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| Popis: | Stratospheric aerosols play a key role in atmospheric chemistry and climate. They are considered a catalyst for ozone depletion, serve as condensation nuclei for polar stratospheric cloud formation, and, in large amounts, have a short-term impact on the Earth's radiative budget. The aerosol effects depend strongly on the aerosol particle size distribution (PSD). Despite its importance, available observations on PSD are rather limited, restricting the knowledge of chemical and climate aerosol feedback mechanisms. We present a novel aerosol climatology including the PSD, the effective radius, and the extinction coefficient from limb observations of SCIAMACHY (Scanning Imaging Absorption Spectrometer for Atmospheric Cartography) operated aboard Envisat between 2002 and 2012. The aerosol climatology is successfully evaluated with in-situ balloon-borne measurements from Wyoming and global aerosol products from different satellite instruments (SAGE II, SAGE III, OSIRIS). The data set significantly expands the limited knowledge of stratospheric aerosol properties and serves to a better understanding of aerosol microphysical processes. We demonstrate its potential by comparing the simulated and observed aerosol plume evolution after the volcanic eruptions of Manam (Jan 2005) and Sarychev (Jun 2009). The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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