نتایج جستجو برای: caliop

تعداد نتایج: 301  

2009
Ruud J. Dirksen K. Folkert Boersma Jos de Laat Piet Stammes Guido R. van der Werf Maria Val Martin Hennie M. Kelder

[1] We investigate rapid around-the-world transport of a smoke aerosol plume released by intense forest fires in southeastern Australia in December 2006. During the first half of December 2006, southeastern Australia suffered from severe drought and exceptionally high temperatures. On 14 December 2006, a passing cold front in combination with the intense heat from the fires causing pyro-convect...

Journal: :Geophysical Research Letters 2007

2014
M. Tesche P. Zieger N. Rastak R. J. Charlson P. Glantz

In this study we investigate to what degree it is possible to reconcile continuously recorded particle light extinction coefficients derived from dry in situ measurements at Zeppelin station (78.92 N, 11.85 E; 475 m above sea level), Ny-Ålesund, Svalbard, that are recalculated to ambient relative humidity, as well as simultaneous ambient observations with the Cloud-Aerosol Lidar with Orthogonal...

2008
Y. Hara D. M. Winker

Three-dimensional structures of Asian dust transport in the planetary boundary layer (PBL) and free atmosphere occurring successively during the end of May 2007 were clarified using results of space-borne backscatter lidar, Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP), and results simulated using a data-assimilated ver-5 sion of a dust transport model (RC4) based on a ground-based ...

2009
YONGXIANG HU DAVID WINKER MARK VAUGHAN BING LIN PING YANG SHAIMA L. NASIRI BRYAN BAUM WENBO SUN ZHAOYAN LIU ZHIEN WANG STUART YOUNG KNUT STAMNES JIANPING HUANG RALPH KUEHN ROBERT HOLZ

The current cloud thermodynamic phase discrimination by Cloud-Aerosol Lidar Pathfinder Satellite Observations (CALIPSO) is based on the depolarization of backscattered light measured by its lidar [CloudAerosol Lidar with Orthogonal Polarization (CALIOP)]. It assumes that backscattered light from ice crystals is depolarizing, whereas water clouds, being spherical, result in minimal depolarizatio...

2016
Zhibo Zhang Kerry Meyer Hongbin Yu Steven Platnick Peter Colarco Zhaoyan Liu Lazaros Oreopoulos

In this paper, we studied the frequency of occurrence and shortwave direct radiative effects (DREs) of abovecloud aerosols (ACAs) over global oceans using 8 years (2007–2014) of collocated CALIOP and MODIS observations. Similar to previous work, we found high ACA occurrence in four regions: southeastern (SE) Atlantic region, where ACAs are mostly light-absorbing aerosols, i.e., smoke and pollut...

2008
S. Berthier P. Chazette J. Pelon

The distribution of clouds in a vertical column is assessed on the global scale through analysis of lidar measurements obtained from three spaceborne lidar systems: LITE (Lidar In-space Technology Experiment, NASA), GLAS (Geoscience Laser Altimeter System, NASA), and CALIOP (Cloud-Aerosol LIdar with Orthogonal Polarization). Cloud top height (CTH) is obtained from the LITE profiles based on a s...

2011
M. Di Pierro

Vertical profiles of aerosol extinction obtained with the CALIOP lidar onboard CALIPSO are used in conjunction with the GEOS-Chem chemical transport model and NOAA’s HYSPLIT trajectory model to document three aerosol export events from East Asia to the Arctic in the year 2007. During each of these events CALIOP sampled the pollution plumes multiple times over periods of five to seven days. Midl...

2016
Martin C. Todd

Dust aerosols are an important component of the climate system and a challenge to incorporate into weather and climate models. Information on the location and magnitude of dust emission remains a key information gap to inform model development. Inadequate surface observations ensure that satellite data remain the primary source of this information over extensive and remote desert regions. Here,...

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