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CloudSat 2C‐ICE product update with a new Z(e) parameterization in lidar‐only region
The CloudSat 2C‐ICE data product is derived from a synergetic ice cloud retrieval algorithm that takes as input a combination of CloudSat radar reflectivity (Z(e)) and Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation lidar attenuated backscatter profiles. The algorithm uses a variat...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5102169/ https://www.ncbi.nlm.nih.gov/pubmed/27867781 http://dx.doi.org/10.1002/2015JD023600 |
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author | Deng, Min Mace, Gerald. G. Wang, Zhien Berry, Elizabeth |
author_facet | Deng, Min Mace, Gerald. G. Wang, Zhien Berry, Elizabeth |
author_sort | Deng, Min |
collection | PubMed |
description | The CloudSat 2C‐ICE data product is derived from a synergetic ice cloud retrieval algorithm that takes as input a combination of CloudSat radar reflectivity (Z(e)) and Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation lidar attenuated backscatter profiles. The algorithm uses a variational method for retrieving profiles of visible extinction coefficient, ice water content, and ice particle effective radius in ice or mixed‐phase clouds. Because of the nature of the measurements and to maintain consistency in the algorithm numerics, we choose to parameterize (with appropriately large specification of uncertainty) Z(e) and lidar attenuated backscatter in the regions of a cirrus layer where only the lidar provides data and where only the radar provides data, respectively. To improve the Z(e) parameterization in the lidar‐only region, the relations among Z(e), extinction, and temperature have been more thoroughly investigated using Atmospheric Radiation Measurement long‐term millimeter cloud radar and Raman lidar measurements. This Z(e) parameterization provides a first‐order estimation of Z(e) as a function extinction and temperature in the lidar‐only regions of cirrus layers. The effects of this new parameterization have been evaluated for consistency using radiation closure methods where the radiative fluxes derived from retrieved cirrus profiles compare favorably with Clouds and the Earth's Radiant Energy System measurements. Results will be made publicly available for the entire CloudSat record (since 2006) in the most recent product release known as R05. |
format | Online Article Text |
id | pubmed-5102169 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-51021692016-11-16 CloudSat 2C‐ICE product update with a new Z(e) parameterization in lidar‐only region Deng, Min Mace, Gerald. G. Wang, Zhien Berry, Elizabeth J Geophys Res Atmos Research Articles The CloudSat 2C‐ICE data product is derived from a synergetic ice cloud retrieval algorithm that takes as input a combination of CloudSat radar reflectivity (Z(e)) and Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation lidar attenuated backscatter profiles. The algorithm uses a variational method for retrieving profiles of visible extinction coefficient, ice water content, and ice particle effective radius in ice or mixed‐phase clouds. Because of the nature of the measurements and to maintain consistency in the algorithm numerics, we choose to parameterize (with appropriately large specification of uncertainty) Z(e) and lidar attenuated backscatter in the regions of a cirrus layer where only the lidar provides data and where only the radar provides data, respectively. To improve the Z(e) parameterization in the lidar‐only region, the relations among Z(e), extinction, and temperature have been more thoroughly investigated using Atmospheric Radiation Measurement long‐term millimeter cloud radar and Raman lidar measurements. This Z(e) parameterization provides a first‐order estimation of Z(e) as a function extinction and temperature in the lidar‐only regions of cirrus layers. The effects of this new parameterization have been evaluated for consistency using radiation closure methods where the radiative fluxes derived from retrieved cirrus profiles compare favorably with Clouds and the Earth's Radiant Energy System measurements. Results will be made publicly available for the entire CloudSat record (since 2006) in the most recent product release known as R05. John Wiley and Sons Inc. 2015-12-16 2015-12-14 /pmc/articles/PMC5102169/ /pubmed/27867781 http://dx.doi.org/10.1002/2015JD023600 Text en ©2015. The Authors. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs (http://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
spellingShingle | Research Articles Deng, Min Mace, Gerald. G. Wang, Zhien Berry, Elizabeth CloudSat 2C‐ICE product update with a new Z(e) parameterization in lidar‐only region |
title | CloudSat 2C‐ICE product update with a new Z(e) parameterization in lidar‐only region |
title_full | CloudSat 2C‐ICE product update with a new Z(e) parameterization in lidar‐only region |
title_fullStr | CloudSat 2C‐ICE product update with a new Z(e) parameterization in lidar‐only region |
title_full_unstemmed | CloudSat 2C‐ICE product update with a new Z(e) parameterization in lidar‐only region |
title_short | CloudSat 2C‐ICE product update with a new Z(e) parameterization in lidar‐only region |
title_sort | cloudsat 2c‐ice product update with a new z(e) parameterization in lidar‐only region |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5102169/ https://www.ncbi.nlm.nih.gov/pubmed/27867781 http://dx.doi.org/10.1002/2015JD023600 |
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