Anomalous thermal structure introduced during solar proton events

Murry Salby*, L. Matrosova

*Corresponding author for this work

    Research output: Contribution to journalArticle

    Abstract

    Satellite observations by SABER provide a record of thermal structure during a population of Solar Proton Events (SPEs). Anomalous polar temperature composited from the population is statistically significant over the middle atmosphere and lower thermosphere. Having form similar over the Arctic and Antarctic, it reflects anomalous warming in the mesosphere and lower thermosphere, where anomalous temperature is of order 10-20 K, and anomalous cooling in the stratosphere, where it is a couple of Kelvin. The stratospheric signature is consistent with the radiative impact of reduced ozone during SPEs. As SPEs are prevalent during years near solar max but rare during years near solar min, the thermal response becomes a consideration for interannual changes.

    Original languageEnglish
    Article numberL23702
    Pages (from-to)1-4
    Number of pages4
    JournalGeophysical Research Letters
    Volume34
    Issue number23
    DOIs
    Publication statusPublished - 16 Dec 2007

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