S
Syed Ismail
Researcher at Langley Research Center
Publications - 122
Citations - 4048
Syed Ismail is an academic researcher from Langley Research Center. The author has contributed to research in topics: Lidar & Water vapor. The author has an hindex of 34, co-authored 122 publications receiving 3859 citations. Previous affiliations of Syed Ismail include California State University, Los Angeles & Howard University.
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Journal ArticleDOI
Airborne lidar observations in the wintertime Arctic stratosphere: Polar stratospheric clouds
Edward V. Browell,Carolyn F. Butler,Syed Ismail,P. A. Robinette,A. F. Carter,Noah S. Higdon,Owen B. Toon,Mark R. Schoeberl,Adrian F. Tuck +8 more
TL;DR: In this paper, a multwavelength airborne lidar system was used to measure polar stratospheric cloud (PSC) distributions in the wintertime Arctic stratosphere and their optical characteristics were measured with a multiview airborne LIDAR system as part of the 1989 Airborne Arctic Stratospheric Expedition.
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Coherent differential absorption lidar measurements of CO2.
Grady J. Koch,Bruce W. Barnes,M. Petros,Jeffrey Y. Beyon,Farzin Amzajerdian,Jirong Yu,Richard E. Davis,Syed Ismail,Stephanie A. Vay,M. J. Kavaya,U. N. Singh +10 more
TL;DR: A differential absorption lidar has been built to measure CO2 concentration in the atmosphere, using a pulsed single-frequency Ho:Tm:YLF laser at a 2.05-microm wavelength and a coherent heterodyne receiver to achieve sensitive detection.
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Differential absorption lidar (DIAL) measurements from air and space
TL;DR: Differential absorption lidar (DIAL) has been used for the measurement of ozone, water vapor, and aerosols from aircraft platforms for over 18 years, yielding new insights into atmospheric chemistry, composition, and dynamics in large-scale field experiments conducted all over the world as discussed by the authors.
Journal ArticleDOI
Error caused by using a constant extinction/backscattering ratio in the lidar solution
TL;DR: A general theoretical analysis of the errors that result from differences between the assumed and actual extinction/backscattering ratio profiles is presented.
Journal ArticleDOI
Saharan dust particles nucleate droplets in eastern Atlantic clouds
Cynthia H. Twohy,Sonia M. Kreidenweis,Trude Eidhammer,Edward V. Browell,Andrew J. Heymsfield,Aaron Bansemer,Bruce E. Anderson,Gao Chen,Syed Ismail,Paul J. DeMott,Susan C. van den Heever +10 more
TL;DR: In this article, the authors demonstrate that Saharan dust particles commonly act as cloud condensation nuclei (CCN) in the eastern North Atlantic and demonstrate that due to its slightly hygroscopic nature, even submicron dust is important as CCN.