Search Results

You are looking at 1 - 5 of 5 items for :

  • Middle atmosphere x
  • All content x
Clear All
Stuart A. Young and Mark A. Vaughan

’s lidar (the Cloud-Aerosol Lidar with Orthogonal Polarization, CALIOP) is a dual-wavelength, dual-polarization, elastic backscatter lidar that transmits linearly polarized pulses of laser light at wavelengths of 1064 and 532 nm. Energy backscattered from the atmosphere is received in a 1-m-diameter telescope and separated into one channel where the 1064-nm signal is detected using an avalanche photodiode, and one channel for each of the orthogonal polarizations at 532 nm where photomultipliers are

Full access
Zhaoyan Liu, Mark Vaughan, David Winker, Chieko Kittaka, Brian Getzewich, Ralph Kuehn, Ali Omar, Kathleen Powell, Charles Trepte, and Chris Hostetler

to complement current measurements and improve our understanding of weather and climate. The availability of a global, multiyear set of vertically resolved measurements of the earth’s atmosphere should ultimately lead to great improvements in both weather and climate models. CALIOP is the first satellite-borne lidar optimized specifically for aerosol and cloud measurements, and is also the first polarization lidar in space. CALIOP is a dual-wavelength, polarization-sensitive elastic backscatter

Full access
Mark A. Vaughan, Kathleen A. Powell, David M. Winker, Chris A. Hostetler, Ralph E. Kuehn, William H. Hunt, Brian J. Getzewich, Stuart A. Young, Zhaoyan Liu, and Matthew J. McGill

CALIOP profile measurements are the spatial locations of these many different types of geophysical entities. The function of the CALIOP layer detection algorithm is thus to untangle scenes such as that shown in Fig. 1 , to identify those portions of the profiles backscattered from clouds, aerosols, and/or the earth’s surface, and to clearly separate those backscattered portions from the ambient “clear air” scattering (i.e., from regions of purely molecular atmosphere). To refer in general to any of

Full access
William H. Hunt, David M. Winker, Mark A. Vaughan, Kathleen A. Powell, Patricia L. Lucker, and Carl Weimer

was built by Alcatel under contract to CNES. The payload combines an active lidar instrument (CALIOP) with passive infrared and visible imagers ( Winker et al. 2003 ). CALIOP is the third lidar launched by NASA to study the earth’s atmosphere from space, having been preceded by the Lidar In-Space Technology Experiment (LITE), launched in September 1994 on STS-64 ( Winker et al. 1996 ), and the Geoscience Laser Altimeter System (GLAS), launched in December 2002 on the Ice, Cloud and Land Elevation

Full access
Yongxiang Hu, David Winker, Mark Vaughan, Bing Lin, Ali Omar, Charles Trepte, David Flittner, Ping Yang, Shaima L. Nasiri, Bryan Baum, Robert Holz, Wenbo Sun, Zhaoyan Liu, Zhien Wang, Stuart Young, Knut Stamnes, Jianping Huang, and Ralph Kuehn

predominantly low-level water clouds ( Fig. 15 ). The uppermost layer clouds at tropics and high latitudes are predominantly ice clouds ( Fig. 15 , left). Nearly all the clouds over Antarctica, Greenland, and the western Pacific warm pool detected by CALIOP are ice clouds ( Fig. 15 , right). Ice clouds with horizontally oriented particles tend to occur over the southern oceans and the middle and high latitudes of the Northern Hemisphere ( Fig. 16 ). Both Figs. 15 and 16 show cloud statistics when the

Full access