Jacquey Visick, Saily Payne, Waldemar Januszczak, John Dugdale, Michael Prescott, J O'Brien, George Mitchell, Mikhail Gorbachev, Patrick French, Matthew Wall, Barbara Hall, Judith O'Reilly Education Correspondent, Humphrey Errington, John Smith, Steve Sailer, Andrew Warshaw, Jim Munro, Jon Swain, Philip Norman, I O'Brien, G Bayfield, Dan Pearson, John Peter, Patricia Clarke, Amanda Ursell, Mrs D Radglck, Elisabeth Hoodless Executive Director, John Jay, Michael Fleiding, Lucy lrvine, Gwyneth Paltrow, Betty Harding, Frank Whitford, Sheridan Morley, Ivo Tennant, Alistair Scott, Sally O'Reilly, Lucy Hughes-Hallett, David Smith, Mrs G Blddlecombe, John Goetz, Chris Dignan, Melanie Phillips, Nick Pitt, William Green, Neil Wormald, E P, Jane Bussmann, Andrew Sullivan, Stephen Grey, Vincent Kearney, Dylan Jones, Mary Wilson, K R, Marlin James, Simon Read, Tony Allen-Mills, Simon Wilde, Martin James, Robert Sandall, John Hegley, Eleanor Mills, Anthony Sattin, Steve Farrar, Robert Winnett, Susan d'ARCY, Jeremy Seal, Irwin Stelzer, B M, Tom English, Robert Hewison, Peter Wilson, Roger Anderson, David Dougill, E McDonald, John Evans, Philip Kingsley, Andrew Gardner, David Hewson, Tania Alexander, Chris Hastings, Harvey Porlock, Margaret Coles, Jonathon Carr-Brown, Alasdair Reid, Hugh Mcllvanney, Hugh Canning, Nigel Williams, Jeremy Clarkson, B T, David Nokes, Jan Newton, Peter Conradi, Louise Taylor, John Waples Deputy City Editor, Edward Porter, Stewart Lee, Mark Guthrie, Paul Eddy, Derek Lundy, Michael Jones, Sam Murphy, John le Carre, Graham Otway, S Davidson, Hugh McManners Defence Correspondent, Nick Gardner, Shelley von Strunckel, D V, Reggie Oliver, Quentin Letts, Peter Parker, Phillip Oppenheim, Josephine Smit, Tom Conran, Paul Donovan, Sue Lawrence, Le Grand Macabre, Hugh McIlvanney, D A Clark, Smita Talati, Salman Rushdie, Derek Clements, Paul Driver, Garth Pearce, Simon Fanshawe, John Follain, Maeve Sheehan, Nicholas Hellen, Steven Downes, Ian Hawkey, David Leppard, Martin Johnson, Alicia Wyllie, Mark Edwards, Steve Farrar Science Correspondent, Kirstie Hamilton, Adrienne Katz, Robert Runcie, Tom Shone, Susan Clark, David Lawrenson, Micheal Specter, East Cowes, Josh Salzamann, David Spurlock, Paul Ostendorf, Phil Baker, Karen Bayne, Jennifer Asiama, Raymond Keene, C L, Juliette Terzleff, Cosmo Landesman, Patrick Francis, Diana Wright, James Joyce, David Ginola, Helen Hawkins, Michael Prescott Political Editor, Paul Nuki Consumer Affairs Editor, Stephen Jones, Dave Burton, Nick Cain, Richard Evans, Stephen Bevan, Paul Nuki, Caroline Donald, Patrick Fussell, Thomas Sutcliffe, Martin Searby, Keith Wheatley, Claire Oldfield, Alun Roderick, David Walsh, Caroline Gascoigne, Zoé Linkson, Colin McDowell, Lois Rogers Medical Correspondent, Stephen Armstrong, Nick MacKinnon, Ann Wroe, Christopher Goodwin, Mark Macaskill, Mark Prigg, Nick Harvey, David Cains, Richard Woods, Garth Alexander, Maurice Chittenden, Sir Terence Conran, Richard Brooks Arts Editor, Andrew Lorenz Business Editor, Judith O'Reilly, Mark Franchetti, Jonathan Powell, Ray Hutton, Cllve Davis, Susan Elkin, Brian Murray, Matthew Parris, Tara Palmer-Tomkinson, Michael Sheridan, David Starkey, Simon Callow, John Harlow, Godfrey Smith, Bill Rogers, John Loaring, Matthew Lynn, Richard Davies, Kate Thornton, John Waples, John Thomson, A A Gill, Matthew Campbell, Brian Glanville, Gary Keenan, David Hutcheon, Tom Robbins, David Sumner Smith, Jonathon Carr-Brown Political Reporter, Robert Johnston, Chrissy Iley, Stephen Pettitt, Trushar Barot, Kevin Goldstein-Jackson, John Spurling, T L, Ian Hunter, Andrew Lorenz, F Stiames, Naomi Caine, Liam Clarke, Charile Dimmock, David Wickers, Sally Kinnes, Roger Dobson, Tom Rhodes, J P, Andrew Frankel, Nicholas Hellen Media Correspondent, Joe Lovejoy, Jonathan Futrell, Rupert Steiner, E C, Hugh Pearman, Dan Cairns, George Stephanopoulos, David Parsley, L Steach, John Phillips, J H, Delshad Karanjla, David Smith Economics Editor, K Evans, Penny Perrick, P G, Anthony Howard, Bob Dwyer, Joanna Simon, Clive Lucas, Chris Feetenby, Barry Newcombe, Nick Faldo, Dominic Rushe, Alan Ross, Boris Schapiro, Russ Guardian,
... SE Burton & Deakin Multiple Classified Advertising Items M3 Calipso Red, Biege leather Fairfield Multiple Classified Advertising Items ...
1999 - Gale Group | Sunday Times HA GDA
Zhujun Li, David Painemal, Gregory L. Schuster, M. Clayton, R. A. Ferrare, Mark Vaughan, Damien Josset, Jayanta Kar, Charles R. Trepte,
Abstract. We assess the CALIPSO Version 4.2 (V4) aerosol typing and assigned lidar ratios over ocean using aerosol optical depth (AOD) retrievals from the ... lidar ratio estimated by combining SODA AOD and CALIPSO attenuated backscatter (CALIPSO–SODA). Six aerosol types – clean marine, dusty marine, ... polluted dust, and elevated smoke – are characterized using CALIPSO–SODA over ocean and the results are compared ... spatial resolutions and having AOD > 0.05, the CALIPSO–SODA lidar ratios are significantly different between different ...
Tópico(s): Atmospheric Ozone and Climate
2022 - Copernicus Publications | Atmospheric measurement techniques
Boming Liu, Yingying Ma, Wei Gong, Ming Zhang, Wei Wang, Yifan Shi,
Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) provides three-dimensional information on aerosol optical properties across the globe. However, the performance of CALIPSO aerosol optical depth (AOD) products under different air ... remains unclear. In this research, three years of CALIPSO level 2 AOD data (November 2013 to December ... effect of air quality on AODs retrieved from CALIPSO, the AODs obtained from CALIPSO, MODIS, and sun photometer were inter-compared under ... Dengfeng. The average absolute bias of AOD between CALIPSO and sun photometer was 0.22 ± 0.21, ...
Tópico(s): Atmospheric Ozone and Climate
2018 - Nature Portfolio | Scientific Reports
Nikolaos Papagiannopoulos, Lucia Mona, Lucas Alados‐Arboledas, Vassilis Amiridis, Holger Baars, Ioannis Binietoglou, Daniele Bortoli, Giuseppe D’Amico, Aldo Giunta, Juan Luís Guerrero-Rascado, Anja Schwarz, S. Pereira, Nicola Spinelli, Ulla Wandinger, Xuan Wang, Gelsomina Pappalardo,
Abstract. The CALIPSO Level 3 (CL3) product is the most recent data set produced by the observations of the Cloud–Aerosol ... the Cloud–Aerosol Lidar and Pathfinder Satellite Observations (CALIPSO) space platform. The European Aerosol Research Lidar Network ( ... is the most appropriate ground-based reference for CALIPSO calibration/validation studies on a continental scale. In this work, CALIPSO data are compared against EARLINET monthly averaged profiles obtained by measurements performed during CALIPSO overpasses. In order to mitigate uncertainties due to ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2016 - Copernicus Publications | Atmospheric chemistry and physics
... the Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite (CALIPSO). CALIPSO observations have the potential to provide improved global ... compared to passive sensor‐derived estimates due to CALIPSO's ability to perform vertically resolved aerosol retrievals ... and over cloud. In this study, uncertainties in CALIPSO‐inferred aerosol DRE are estimated using multiple years ... at midlatitude and tropical sites. We find that CALIPSO is unable to detect all radiatively significant aerosol, ... is likely the consequence of random noise in CALIPSO measurements and therefore will affect global observations as ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2015 - Wiley | Journal of Geophysical Research Atmospheres
Xiaoyan Ma, Kevin S. Bartlett, K. Harmon, Fangqun Yu,
... Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) provide global vertical profiles of aerosol optical properties ... we employed about 6 yr (2006–2011) of CALIPSO level 3 monthly mean gridded aerosol optical depth ( ... While the spatial distribution and seasonal variability of CALIPSO AOD is generally consistent with that of MODIS, CALIPSO is overall lower than MODIS as MODIS has higher frequency than CALIPSO for most bins of AOD. The correlation between MODIS and CALIPSO is better over ocean than over land. We ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2013 - Copernicus Publications | Atmospheric measurement techniques
Yonghua Wu, Lina Cordero, Barry Gross, Fred Moshary, Sam Ahmed,
CALIPSO Level-1 attenuated backscatter and Level-2 aerosol products (Version-3.01) are evaluated with a ... the New York metropolitan area. To assess the CALIPSO Level-1 product, we combine the co-located ... extinction and backscatter profiles, and then simulate the CALIPSO equivalent attenuated backscatter coefficients. Direct statistical comparisons show ... and smoke plume events are focused to evaluate CALIPSO Level-2 aerosol layer products. The CALIPSO algorithms for cloud-aerosol discrimination and aerosol type ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2013 - Elsevier BV | Atmospheric Environment
John E. Yorks, Dennis L. Hlavka, Mark Vaughan, Matthew J. McGill, William D. Hart, Sharon Rodier, Ralph E. Kuehn,
... The Cloud-Aerosol Lidar Infrared Pathfinder Satellite Observations (CALIPSO) satellite was successfully launched in 2006 and has ... airborne Cloud Physics Lidar (CPL) to validate the CALIPSO Level 1 and 2 data products. This paper presents results from coincident CALIPSO and CPL measurements of ice cloud spatial properties. ... as statistics for all coincident measurements during the CALIPSO-CloudSat Validation Experiment (CC-VEX). CALIPSO layer detection algorithms for cirrus clouds are reliable ... ice cloud spatial properties in two distinct cases. CALIPSO experiences less sensitivity to optically thin cirrus due ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2011 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Yuichiro Hagihara, Hajime Okamoto, Ryo Yoshida,
... Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellites. First, we developed a cloud mask scheme for CALIPSO using a threshold of the attenuated total backscattering ... continuity test. We then developed a combined CloudSat‐CALIPSO cloud mask. These cloud masks were applied to ... topmost layer detected by the sensors using our CALIPSO scheme, the VFM, our combined CloudSat‐CALIPSO scheme, and the Aqua Moderate Resolution Imaging Spectroradiometer ( ... result was larger than that of our CloudSat‐CALIPSO scheme, and results from the VFM and our ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2010 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Chaoshun Liu, Xianxia Shen, Wei Gao, Pudong Liu, Zhibin Sun,
... Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) were inter-compared and validated against ground-based ... Xinglong, and SACOL. Low correlations were observed between CALIPSO and ground-based sunphotometer data in in south ... show that the overall spatio-temporal distribution of CALIPSO AOD and MODIS AOD are basically consistent. As ... value regions and low-value regions in China. CALIPSO is systematically lower than MODIS over China, especially ... winter and autumn. Statistical frequency analysis show that CALIPSO AOD and MODIS AOD was separated at the ...
Tópico(s): Atmospheric Ozone and Climate
2014 - SPIE | Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
Hongchun Jin, Shaima L. Nasiri,
... Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations ( CALIPSO ) cloud thermodynamic phase. The AIRS cloud phase is ... within the 8–12- μ m window, and CALIPSO provides coincident pixel-scale observations of cloud phase ... channel. Comparisons are performed between the AIRS and CALIPSO cloud-phase observations for single-layer (48.5% ... The AIRS ice phase is in agreement with CALIPSO for more than 90% of coincident observations globally, ... and multilayered clouds. AIRS water phase generally follows CALIPSO spatial patterns, but the frequency is lower by ...
Tópico(s): Meteorological Phenomena and Simulations
2013 - American Meteorological Society | Journal of Applied Meteorology and Climatology
Hongbin Yu, Mian Chin, David M. Winker, Ali Omar, Zhaoyan Liu, C. Kittaka, T. Diehl,
... Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) lidar observations from June 2006 to November 2007. ... to separate dust from non‐dust aerosol. The CALIPSO aerosol observations are compared with aerosol simulations from ... from the MODerate resolution Imaging Spectroradiometer (MODIS). The CALIPSO observations of geographical patterns and seasonal variations of ... shows large discrepancies in most regions. Both the CALIPSO observation and GOCART model show that the aerosol ... than that in industrial pollution source regions. The CALIPSO aerosol lidar ratio also generally agrees with GOCART ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2010 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Lucia Mona, Gelsomina Pappalardo, Aldo Amodeo, Giuseppe D’Amico, Fabio Madonna, Antonella Boselli, Aldo Giunta, Felicita Russo, V. Cuomo,
... for the validation of data products provided by CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations), ... been performed at CNR-IMAA in coincidence with CALIPSO overpasses. For the first time, results on 1- ... based multi-wavelength Raman lidar measurements and corresponding CALIPSO lidar Level 1 profiles are presented. A methodology ... Cases with the detection of cirrus clouds in CALIPSO data are separately analysed for taking into account ... conditions, the comparison shows good performances of the CALIPSO on-board lidar: the mean relative difference between ...
Tópico(s): Atmospheric chemistry and aerosols
2009 - Copernicus Publications | Atmospheric chemistry and physics
Robert J. DeCoursey, Ryan Melton, Robert R. Estes,
The CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) mission is a comprehensive suite of active and passive ... Earth-looking camera and an imaging infrared radiometer. CALIPSO flies in formation with the Earth Observing System ... measurements and is a planned 3 year mission. CALIPSO was launched into a 98 degree sun synchronous ... Figure 1 shows the ground track of one CALIPSO orbit as well as high and low intensity South Atlantic Anomaly outlines. CALIPSO passes through the SAA several times each day. ...
Tópico(s): Parallel Computing and Optimization Techniques
2006 - SPIE | Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
... Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) lidar measurements. The neural network is trained with CALIPSO ocean surface and atmospheric backscatter measurements together with ... derived by applying the neural network algorithm to CALIPSO measurements between 2008 and 2020. CALIPSO wind speed measurements of 2015 are also compared ... satellite. Aerosol optical depths are then derived from CALIPSO’s ocean surface backscatter signal and theoretical ocean surface reflectance calculated from CALIPSO wind speed and Cox-Munk wind–surface slope ...
Tópico(s): Meteorological Phenomena and Simulations
2021 - Frontiers Media | Frontiers in Remote Sensing
Ziyue Zhang, Miao Zhang, Muhammad Bilal, Bo Su, Zhang Chun, Liuna Guo,
... cloud-aerosol lidar, and infrared pathfinder satellite observation (CALIPSO) AOD retrievals over the Yellow River Basin (YERB), ... the YERB). Errors and agreement between MODIS and CALIPSO data were reported using Pearson’s correlation ( R ) ... relative mean bias (RMB). Results showed that the CALIPSO whole layers AOD (AOD S ) were better matched with MODIS AOD than the CALIPSO lowest layer AOD (AOD 1 ). The time series ... observed in autumn. The overall average value of CALIPSO AOD and MODIS AOD both fitted the order: ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2020 - Springer Science+Business Media | Earth Systems and Environment
Kelly A. Balmes, Qiang Fu, Tyler J. Thorsen,
... Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite and ground‐based Raman lidars (RLs) at ... cloudy mean ice cloud column optical depths from CALIPSO Version 4 data product with a horizontal resolution ... is caused by the lidar ratio that for CALIPSO is related to its treatment of the multiple ... differences in the optical depth distribution between the CALIPSO and RL are found for small optical depths ... depth distributions and their mean values between the CALIPSO and RL can largely be reconciled over both ...
Tópico(s): Meteorological Phenomena and Simulations
2019 - Wiley | Journal of Geophysical Research Atmospheres
Adrien Lacour, Hélène Chepfer, Matthew D. Shupe, Nathaniel B. Miller, Vincent Noël, Jennifer E. Kay, David D. Turner, Rodrigo Guzman,
... Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations ( CALIPSO) satellite provide the first-ever observations of cloud ... the entire Greenland Ice Sheet. This study leverages CALIPSO observations over Greenland to pursue two investigations. First, the GCM-Oriented CALIPSO Cloud Product ( CALIPSO-GOCCP) observations are compared with collocated ground-based ... 5 × 10 −3 g m −3 ) missed by CALIPSO-GOCCP. Those results are compared with satellite cloud ... assessment. Most passive sensors detect fewer clouds than CALIPSO-GOCCP and the Summit ground observations, due to ...
Tópico(s): Meteorological Phenomena and Simulations
2017 - American Meteorological Society | Journal of Climate
Ashish Kumar, Narendra Singh, Anshumali Anshumali, Raman Solanki,
... Cloud-Aerosol LiDAR and Infrared Pathfinder Satellite Observations (CALIPSO) versions (4.10 and 3) are subjected for ... deep blue (DB) 30 km × 30 km and CALIPSO ver. 4.10 (overpass within ~ 100 km distance) ... the AOD retrieved using MODIS and ~ 87% from CALIPSO were found to be within the expected error ( ... comparison between MODIS Terra C6.0 DB and CALIPSO ver. 4.10, suggested their synergic use for ... over Himalayas. In comparison to the ver. 3, CALIPSO ver. 4.10 is found to have undergone ... that the wavelet covariance transform (WCT) method for CALIPSO could be the best choice as compared to ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2017 - Elsevier BV | Remote Sensing of Environment
G Cesana, Hélène Chepfer, David M. Winker, Brian Getzewich, X. Cai, Olivier Jourdan, Guillaume Mioche, Hajime Okamoto, Yuichiro Hagihara, Vincent Noël, Mathieu Reverdy,
... Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) to airborne in situ measurements. Our analysis of ... measurements mainly arise from three factors. First, averaging CALIPSO Level l data along track before cloud detection ... in classification of fully attenuated pixels among the CALIPSO climatologies lead to differences in the low‐level ... midlatitudes, retrievals of homogeneous high ice clouds by CALIPSO data sets are very robust (more than 94. ... show disagreements with the in situ measurements and CALIPSO‐General Circulation Models‐Oriented Cloud Product (GOCCP) report ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2016 - Wiley | Journal of Geophysical Research Atmospheres
Vassilis Amiridis, Eleni Marinou, Alexandra Tsekeri, Ulla Wandinger, Anja Schwarz, E. Giannakaki, Rodanthi-Elisavet Mamouri, Panagiotis Kokkalis, Ioannis Binietoglou, Stavros Solomos, Themistocles Herekakis, Stelios Kazadzis, Evangelos Gerasopoulos, Emmanouil Proestakis, Michael Kottas, Dimitris Balis, Alexandros Papayannis, Charalampos Kontoes, Konstantinos Kourtidis, Nikolaos Papagiannopoulos, Lucia Mona, Gelsomina Pappalardo, Olivier Le Rille, Albert Ansmann,
... 532 nm. The global database is based on CALIPSO observations at 532 and 1064 nm and on ... spectral conversions are calculated for each of the CALIPSO aerosol types and are applied to CALIPSO backscatter and extinction data corresponding to the aerosol type retrieved by the CALIPSO aerosol classification scheme. A cloud optical database based on CALIPSO measurements at 532 nm is also provided, neglecting ... 1 January 2008–31 December 2011) time-averaged CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) ...
Tópico(s): Atmospheric chemistry and aerosols
2015 - Copernicus Publications | Atmospheric chemistry and physics
Tyler J. Thorsen, Qiang Fu, J. M. Comstock, Chitra Sivaraman, Mark Vaughan, David M. Winker, David D. Turner,
... Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite, the ground‐based ARM micropulse lidar (MPL), ... checking the validity of diurnal cycles. RL and CALIPSO cloud fraction profiles show good agreement while the ... cirrus, particularly during the daytime. Both MPL and CALIPSO observations show that cirrus clouds occur less frequently ... daytime). For cirrus geometrical thickness, the MPL and CALIPSO observations agree well and both data sets have ... the application of daytime detection limits to all CALIPSO data, we find that the decreased MPL and ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2013 - Wiley | Journal of Geophysical Research Atmospheres
Yuichiro Hagihara, Hajime Okamoto, Zhengzhao Luo,
... Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) lidar. Theoretical estimates have shown that CloudSat has higher sensitivity than CALIPSO does when large particles exist. In such case ... possible that CloudSat‐determined CTHs are larger than CALIPSO‐determined CTHs. We compared the global distribution of CTHs detected by CloudSat and CALIPSO (version 3, V3) using our cloud mask schemes ... clouds where CloudSat‐determined CTHs were larger than CALIPSO‐determined CTHs turned out to be unexpectedly large. ...
Tópico(s): Atmospheric chemistry and aerosols
2013 - Wiley | Journal of Geophysical Research Atmospheres
Hyoun-Myoung Cho, Ping Yang, George W. Kattawar, Shaima L. Nasiri, Yongxiang Hu, Patrick Minnis, Charles Trepte, David M. Winker,
... Cloud- Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite and the collocated cloud products derived from ... Climatology Project (ISCCP) cloud classification scheme. While the CALIPSO observations provide information for up to 10 cloud ... and layer-averaged depolarization ratio (delta) from the CALIPSO measurements show both water- and ice-phase features ... classes. Furthermore, we screen both the MODIS and CALIPSO data to eliminate cases in which CALIPSO detected two- or multi-layered clouds. It is ...
Tópico(s): Aeolian processes and effects
2008 - Optica Publishing Group | Optics Express
Matthew J. McGill, Mark Vaughan, Charles R. Trepte, William D. Hart, Dennis L. Hlavka, David M. Winker, Ralph E. Kuehn,
The Cloud‐Aerosol Lidar Infrared Pathfinder Satellite Observations (CALIPSO) satellite provides a new and exciting opportunity to ... remote sensing. Following the successful launch of the CALIPSO satellite, validation flights were conducted using the long‐established Cloud Physics Lidar (CPL) to verify CALIPSO's calibration and validate various CALIPSO data products. This paper presents results of the initial comparisons made between the spaceborne CALIPSO lidar and the airborne CPL. Results are presented ...
Tópico(s): Atmospheric chemistry and aerosols
2007 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Goutam Choudhury, Matthias Tesche,
... estimate cloud condensation nuclei (CCN) concentrations from spaceborne CALIPSO (Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations) lidar measurements. The algorithm utilizes (i) the CALIPSO-derived backscatter and extinction coefficient, depolarization ratio, and ... volume size distributions and refractive indices from the CALIPSO aerosol model; and (iii) the MOPSMAP (modelled optical ... of aerosol particles) optical modelling package. For each CALIPSO height bin, we first select the aerosol-type ...
Tópico(s): Atmospheric Ozone and Climate
2022 - Copernicus Publications | Atmospheric measurement techniques
Ling Zou, Sabine Grießbach, Lars Hoffmann, Bing Gong, Lunche Wang,
... Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) data. For the identification of stratospheric cirrus clouds, ... 5 km above the tropopause as stratospheric for CALIPSO data. For MIPAS data, we took into account ... measurements because of the higher detection sensitivity of CALIPSO. In both data sets, MIPAS and CALIPSO, the stratospheric cirrus cloud occurrence frequencies are significantly ... 5 % for MIPAS rather than about 2 % for CALIPSO). We attribute more frequent observations of stratospheric cirrus ...
Tópico(s): Atmospheric chemistry and aerosols
2020 - Copernicus Publications | Atmospheric chemistry and physics
Yunqian Zhu, O. B. Toon, M. C. Pitts, A. Lambert, Charles Bardeen, Douglas E. Kinnison,
... PSC ice particles and dehydration. Our simulations and CALIPSO satellite data suggest two major NAT particle formation ... of 2010–2011, reproduces optical properties observed by CALIPSO over Antarctica in May and the timing of ... within their uncertainties. On the other hand, the CALIPSO data indicate that our simulations are missing clouds ... investigations. The simulated cloud coverage agrees with the CALIPSO cloud coverage within a few percent on average ... correlation coefficient of 0.83. However, using the CALIPSO classification algorithm, simulated ice clouds often fall into ...
Tópico(s): Atmospheric chemistry and aerosols
2017 - Wiley | Journal of Geophysical Research Atmospheres
Vassilis Amiridis, Ulla Wandinger, Eleni Marinou, E. Giannakaki, Alexandra Tsekeri, Sara Basart, Stelios Kazadzis, Antonis Gkikas, Michael Taylor, J. M. Baldasano, Albert Ansmann,
Abstract. We demonstrate improvements in CALIPSO (Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations) dust extinction retrievals over northern Africa and Europe when corrections are applied regarding ... the averaging scheme introduced in the Level 3 CALIPSO product. First, a universal, spatially constant lidar ratio ... 10 reported in the literature for the original CALIPSO product. When compared with the MODIS (Moderate-Resolution ... Spectroradiometer) collocated aerosol optical depth (AOD) product, the CALIPSO negative bias is even less for the lidar ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2013 - Copernicus Publications | Atmospheric chemistry and physics
Elpida Leventidou, Prodromos Zanis, Dimitris Balis, E. Giannakaki, Ioannis Pytharoulis, Vassilis Amiridis,
... study is to propose an evaluation methodology of CALIPSO retrievals of the planetary boundary layer (PBL) height ... years between 2006 and 2011. Low correlations between CALIPSO and ECMWF are found when CALIPSO aerosol classification scheme reveals dust presence over Thessaloniki. ... eliminating cases of dust advection, the correlation between CALIPSO and ECMWF improves considerably, reaching a value of 0.82, while the correlation between CALIPSO and radiosondes reaches 0.74. The proposed methodology ... layers for the Mediterranean site investigated here, the CALIPSO PBL height could be considered a valuable satellite ...
Tópico(s): Meteorological Phenomena and Simulations
2013 - Elsevier BV | Atmospheric Environment