An Improvement to the High-Spectral-Resolution CO2-Slicing Cloud-Top Altitude Retrieval
Robert E. Holz,Steve Ackerman,Paolo Antonelli,F. Nagle,Robert O. Knuteson,Matthew J. McGill,Dennis L. Hlavka,William D. Hart +7 more
TLDR
In this article, an improvement to high-spectral-resolution infrared cloud-top altitude retrievals is compared to existing retrieval methods and cloud lidar measurements using CO2 sorting, which determines optimal channel pairs to which the CO2 slicing retrieval will be applied.Abstract:
An improvement to high-spectral-resolution infrared cloud-top altitude retrievals is compared to existing retrieval methods and cloud lidar measurements. The new method, CO2 sorting, determines optimal channel pairs to which the CO2 slicing retrieval will be applied. The new retrieval is applied to aircraft Scanning High-Resolution Interferometer Sounder (S-HIS) measurements. The results are compared to existing passive retrieval methods and coincident Cloud Physics Lidar (CPL) measurements. It is demonstrated that when CO2 sorting is used to select channel pairs for CO2 slicing there is an improvement in the retrieved cloud heights when compared to the CPL for the optically thin clouds (total optical depths less than 1.0). For geometrically thick but tenuous clouds, the infrared retrieved cloud tops underestimated the cloud height, when compared to those of the CPL, by greater than 2.5 km. For these cases the cloud heights retrieved by the S-HIS correlated closely with the level at which the CPL...read more
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Journal ArticleDOI
Assessment of Global Cloud Datasets from Satellites: Project and Database Initiated by the GEWEX Radiation Panel
Claudia J. Stubenrauch,William B. Rossow,Stefan Kinne,Steven A. Ackerman,G. Cesana,Hélène Chepfer,L. Di Girolamo,Brian Getzewich,A. Guignard,Andrew K. Heidinger,B. C. Maddux,W. P. Menzel,Patrick Minnis,C. Pearl,Steven Platnick,Caroline Poulsen,Jerome Riedi,S. Sun-Mack,Andi Walther,Dave Winker,S. Zeng,G. Zhao +21 more
TL;DR: The Global Energy and Water Cycle Experiment (GEWEX) Cloud Assessment as discussed by the authors provides the first coordinated intercomparison of publicly available, standard global cloud products (gridded monthly statistics) retrieved from measurements of multispectral imagers (some with multiangle view and polarization capabilities).
Journal ArticleDOI
Cloud Detection with MODIS. Part II: Validation
Steven A. Ackerman,Robert E. Holz,Richard A. Frey,Edwin W. Eloranta,B. C. Maddux,Matthew J. McGill +5 more
TL;DR: In this article, the performance of the MODIS cloud mask algorithm is compared with lidar observations from ground [Arctic High-Spectral Resolution Lidar] and aircraft [Cloud Physics LIDar], and satellite-borne [Geoscience Laser Altimeter System (GLAS)] platforms.
Journal ArticleDOI
MODIS Global Cloud-Top Pressure and Amount Estimation: Algorithm Description and Results
W. Paul Menzel,Richard A. Frey,Hong Zhang,Donald P. Wylie,C. C. Moeller,Robert E. Holz,B. C. Maddux,Bryan A. Baum,Kathy Strabala,Liam E. Gumley +9 more
TL;DR: The MODIS cloud algorithm produces cloud-top pressures that are found to be within 50 hPa of lidar determinations in single-layer cloud situations as mentioned in this paper, where the upper layer cloud is semitransparent.
Journal ArticleDOI
Global Moderate Resolution Imaging Spectroradiometer (MODIS) cloud detection and height evaluation using CALIOP
Robert E. Holz,Steven A. Ackerman,F. Nagle,Richard A. Frey,Steven Dutcher,Ralph Kuehn,Mark A. Vaughan,Bryan A. Baum +7 more
TL;DR: In this article, a comparison between the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) and the Moderate Resolution Imaging Spectroradiometer (MODIS) for both cloud detection and cloud top height (CTH) retrievals is presented.
Journal ArticleDOI
Reconciling Simulated and Observed Views of Clouds: MODIS, ISCCP, and the Limits of Instrument Simulators
Robert Pincus,Steven Platnick,Steven A. Ackerman,Richard S. Hemler,Robert J. Patrick Hofmann +4 more
TL;DR: In this paper, the authors consider the extent to which instrument simulators are able to capture essential differences between MODIS and ISCCP, two similar but independent estimates of cloud properties.
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