DOI: 10.1029/2004jd005664
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Abstract: [1] The impact of Rossby wave breaking on the subtropical tropopause and intrusions of high potential vorticity air into the tropical upper troposphere (UT) on subtropical humidity is examined using measurements from the Microwave Limb Sounder (MLS) and Atmospheric Infrared Sounder (AIRS) satellite instruments and trajectory-based simulations. Both data sets and the simulations show large gradients in humidity in the vicinity of the intrusions, with very dry air within the intrusions (relative humidity (RH) l…

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