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Science Features : HIRDLS

OMI featureGlobal Characteristics of the Double Tropopause
The global pattern of the double tropopause is revealed using the HIRDLS high vertical resolution profiles. Composition and structure near the tropopause are important for the Earth radiative balance and quantifying transport of ozone and other stratospheric species into the troposphere.
HIRDLS featureEquatorial wave structure
HIRDLS temperature measurement sampling and resolution afford unprecedented views of the latitude-height structure of equatorial waves at altitudes above the cloud tops.
HIRDLS featureGravity wave momentum fluxes in polar regions
HIRDLS observations are used to quantify gravity wave momentum fluxes in the middle atmosphere.
HIRDLS featureGravity wave momentum fluxes in monsoon regions
Measurements from HIRDLS are used to quantify gravity wave momentum fluxes generated from monsoon regions across the globe over the three years 2005-2007.
HIRDLS featureStratosphere-Troposphere Intrusions
Deep intrusions of tropospheric air into the lower stratosphere above the subtropical jet, characterized by low ozone concentration and low static stability, are consistently observed with Aura/HIRDLS.
Cirrus distribution mapped with HIRDLSCirrus distribution mapped with HIRDLS
Ongoing research using this data will determine how this heating enhances vertical transport in the upper troposphere.
HIRDLS Cloud ExtinctionHIRDLS Cloud Extinction
High thin clouds are difficult to detect from space. The first comprehensive climatology of thin clouds has been developed with the HIRDLS limb viewing infrared radiometer.
Aura Science Result ImageObservations 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.
Aura Science Result ImageSpectacular 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.
MLS Sub-Visual CirrusFirst 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.springtime breakup of the 2004 Antarctic vortex.
Gravity WavesFirst 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.





Goddard Space Flight Center