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Observations of Laminar Cirrus
Recent observations by the HIRDLS and CALIPSO experiments provide more detailed observations of the subvisible cirrus. This information will help describe the physics of cirrus formation, and possible future changes in stratospheric and upper tropospheric water vapor.
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Spectacular Mountain Wave Events
The HIRDLS instrument aboard the Aura satellite is measuring temperature profiles of the atmosphere, revealing small-scale atmospheric buoyancy waves (also known as "gravity waves") in fine detail.
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First Maps of Sub-Visual Cirrus in the Upper Tropical Troposphere
MLS sees cloud ice, but HIRDLS sees the clouds themselves, even clouds that are so thin that people cannot see them. Just as in the MLS cloud ice map we see large amounts of this cirrus in regions of significant cloud ice.
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First Global Measurement of Small Scale Gravity Waves in the Stratosphere
HIRDLS high resolution temperature measurements show short vertical wavelength gravity waves, permitting assessment of gravity wave forcing in the stratospheric circulation.
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