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First Observations of Short-Period Eastward Propagating Planetary Waves From the Stratosphere to the Lower Thermosphere (110 km) in Winter Antarctica
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2017
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Source: Geophysical Research Letters, 44(20), 10,744-10,753
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Journal Title:Geophysical Research Letters
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Description:Unique Fe lidar observations in May 2014 at McMurdo, combined with Aura-Microwave Limb Sounder measurements, lead to a new discovery that the amplitudes of 4 day and 2.5 day planetary waves (PWs) grow rapidly from 1 –2 K at 100 km to over 10 K at 110 km. This report is also the first observation of short-period (1 –5 days) eastward propagating PWs from 30 km all the way to 110 km. The Speci fied Dynamics-Whole Atmosphere Community Climate Model reproduces the observed three dominant peaks of amplitudes in temperature and coherent vertical phase structures. The data-model comparison indicates a possible mechanism: After PWs originated from the stratosphere dissipate along the critical level, thesurviving waves are ampli fied by in situ instability in the mesosphere and lower thermosphere, resulting in
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Source:Geophysical Research Letters, 44(20), 10,744-10,753
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DOI:
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ISSN:0094-8276
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Rights Information:Other
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Compliance:Library
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