Search Results

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

  • Southern Ocean x
  • All content x
Clear All
Zhaoyan Liu, Mark Vaughan, David Winker, Chieko Kittaka, Brian Getzewich, Ralph Kuehn, Ali Omar, Kathleen Powell, Charles Trepte, and Chris Hostetler

cloud should be classified as cloud by convention ( section 2e ). Further analyses have also been performed to partition the hot cirrus features. This analysis checks the CloudSat measurement: if no cloud is seen in the nearest CloudSat profiles, this hot cirrus layer is identified as a misclassified dust layer. Misclassification of water clouds as ice has been assessed by applying the same temperature test to the hot cirrus found in regions over remote southern oceans, where dust is not expected to

Full access
Ali H. Omar, David M. Winker, Mark A. Vaughan, Yongxiang Hu, Charles R. Trepte, Richard A. Ferrare, Kam-Pui Lee, Chris A. Hostetler, Chieko Kittaka, Raymond R. Rogers, Ralph E. Kuehn, and Zhaoyan Liu

predominantly smoke extending from land to the deep ocean. Note that the aerosol type on the ocean surface is classified as marine aerosol. The algorithm identifies this 3000-km layer of smoke found in southwestern Africa. Carbon monoxide (CO) measurements from the Measurements of Pollution in the Troposphere (MOPITT) by Bremer et al. (2004) show that CO in this region is at its peak during September–November (SON), although the number of southern African fires may peak in June–August (JJA), with some

Full access
Stuart A. Young and Mark A. Vaughan

to J. Atmos. Oceanic. Technol., hereafter HJTECH). For aerosols, an aerosol subtyping algorithm selects lidar ratios at 532 and 1064 nm for each feature in the scene by using the scattering characteristics provided by SIBYL for each layer, along with the ancillary surface type from the International Geosphere–Biosphere Programme (IGBP) and the National Snow and Ice Data Center (NSIDC) ( OJTECH ). Approximations used in the correction of the retrieved extinction profiles for the effects of

Full access
Kathleen A. Powell, Chris A. Hostetler, Mark A. Vaughan, Kam-Pui Lee, Charles R. Trepte, Raymond R. Rogers, David M. Winker, Zhaoyan Liu, Ralph E. Kuehn, William H. Hunt, and Stuart A. Young

tropical region (see section 4a and Fig. 9 ). The second exception is near the Southern Hemisphere night-to-day terminator, where the signal decreases as the satellite enters sunlight and thermal changes begin to effect the alignment of the lidar transmitter and receiver ( Hunt et al. 2009 ). b. Calibration procedure The vertical extent of the standard CALIOP calibration region extends down from 34 to 30 km. This region is high enough in the stratosphere to be relatively (albeit not completely) free

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