A New MEPED-Based Precipitating Electron Data Set.

Autor: Pettit JM; Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USA., Randall CE; Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USA.; Department of Atmospheric and Oceanic Sciences University of Colorado Boulder CO USA., Peck ED; Tamr Cambridge MA USA., Harvey VL; Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USA.; Department of Atmospheric and Oceanic Sciences University of Colorado Boulder CO USA.
Jazyk: angličtina
Zdroj: Journal of geophysical research. Space physics [J Geophys Res Space Phys] 2021 Dec; Vol. 126 (12), pp. e2021JA029667. Date of Electronic Publication: 2021 Dec 19.
DOI: 10.1029/2021JA029667
Abstrakt: The work presented here introduces a new data set for inclusion of energetic electron precipitation (EEP) in climate model simulations. Measurements made by the medium energy proton and electron detector (MEPED) instruments onboard both the Polar Orbiting Environmental Satellites and the European Space Agency Meteorological Operational satellites are used to create global maps of precipitating electron fluxes. Unlike most previous data sets, the electron fluxes are computed using both the 0° and 90° MEPED detectors. Conversion of observed, broadband electron count rates to differential spectral fluxes uses a linear combination of analytical functions instead of a single function. Two dimensional maps of electron spectral flux are created using Delaunay triangulation to account for the relatively sparse nature of the MEPED sampling. This improves on previous studies that use a 1D interpolation over magnetic local time or L-shell zonal averaging of the MEPED data. A Whole Atmosphere Community Climate Model (WACCM) simulation of the southern hemisphere 2003 winter using the new precipitating electron data set is shown to agree more closely with observations of odd nitrogen than WACCM simulations using other MEPED-based electron data sets. Simulated EEP-induced odd nitrogen increases led to ozone losses of more than 15% in the polar stratosphere near 10 hPa in September of 2003.
(©2021. The Authors.)
Databáze: MEDLINE
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