Interannual Comparison of Mesospheric Responses to Stratospheric Sudden Warmings, as Seen in SABER Data, 2002-2010

Details Interannual Comparison of Mesospheric Responses to Stratospheric Sudden Warmings, as Seen in SABER Data, 2002-2010 Interannual Comparison of Mesospheric Responses to Stratospheric Sudden Warmings, as Seen in SABER Data, 2002-2010

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa31a1716p&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA31A-1716

Physics

[3332] Atmospheric Processes / Mesospheric Dynamics, [3334] Atmospheric Processes / Middle Atmosphere Dynamics, [3360] Atmospheric Processes / Remote Sensing, [3389] Atmospheric Processes / Tides And Planetary Waves

Scientific paper

The past decade has seen the most active sequence of boreal winters in the satellite era. Nine of the ten years witnessed major stratospheric sudden warmings (SSWs), including three of the most intense ever observed, and there were a number of minor warmings as well. This report documents TIMED/SABER observations of mesospheric structure throughout this period, providing an interannual comparison of the extent and timing of its response to these SSWs. Mesospheric cooling is associated with all events, in variable altitude ranges, and is usually seen first at the higher altitudes. Several SSWs perturbed the OH layer, in extreme cases producing a rise in its altitude followed by a descent to abnormally low levels. The timing of both cooling and OH layer changes with respect to the SSW is consistent from event to event. The occurrence of four SSWs within a period of ~35 days in 2008 produced a quasiperiodic response in the mesosphere that illustrates the temporal relationships even more clearly than the interannual comparisons do.

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