Multiple scattering in observations of the GPM dual-frequency precipitation radar: Evidence and impact on retrievals
This paper illustrates how multiple scattering signatures affect Global Precipitation Measuring (GPM) Mission Dual-Frequency Precipitation Radar (DPR) Ku and Ka band reflectivity measurements and how they are consistent with prelaunch assessments based on theoretical considerations and confirmed by...
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ftleicester:oai:lra.le.ac.uk:2381/32279 2023-05-15T17:36:56+02:00 Multiple scattering in observations of the GPM dual-frequency precipitation radar: Evidence and impact on retrievals Battaglia, Alessandro Tanelli, S. Mroz, K. Tridon, Frederick 2015-05-15T11:16:25Z http://onlinelibrary.wiley.com/doi/10.1002/2014JD022866/abstract http://hdl.handle.net/2381/32279 https://doi.org/10.1002/2014JD022866 en eng American Geophysical Union (AGU) & Wiley Journal of Geophysical Research: Atmospheres, 2015, 120 (9) pp 4090 - 4101. 2169-897X http://onlinelibrary.wiley.com/doi/10.1002/2014JD022866/abstract http://hdl.handle.net/2381/32279 doi:10.1002/2014JD022866 2169-8996 ©2015. The Authors. This is an open access article under the terms of the Creative Commons Attribution License (CC BY 4.0) (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY radar GPM-DPR multiple scattering graupel Journal Article Article 2015 ftleicester https://doi.org/10.1002/2014JD022866 2019-03-22T20:20:16Z This paper illustrates how multiple scattering signatures affect Global Precipitation Measuring (GPM) Mission Dual-Frequency Precipitation Radar (DPR) Ku and Ka band reflectivity measurements and how they are consistent with prelaunch assessments based on theoretical considerations and confirmed by airborne observations. In particular, in the presence of deep convection, certain characteristics of the dual-wavelength reflectivity profiles cannot be explained with single scattering, whereas they are readily explained by multiple-scattering theory. Examples of such signatures are the absence of surface reflectivity peaks and anomalously small reflectivity slopes in the lower troposphere. These findings are relevant for DPR-based rainfall retrievals and stratiform/convective classification algorithms when dealing with deep convective regions. A path to refining the rainfall inversion problem is proposed by adopting a methodology based on a forward operator which accounts for multiple scattering. A retrieval algorithm based on this methodology is applied to a case study over Africa, and it is compared to the standard DPR products obtained with the at-launch version of the standard algorithms. The work done by A. Battaglia and F. Tridon was funded by the project “Calibration and validation studies over the North Atlantic and UK for the Global Precipitation Mission,” which was funded by the UK NERC (NE/L007169/1). The work done by S. Tanelli was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. This work was carried out for the GPM mission under the Precipitation Measurement Missions program, and support by Ramesh Kakar is gratefully acknowledged. V03B-GPM and MSG data were downloaded from the Precipitation Processing System (DOI 10.5067/GPM/DPR/DPR/2A, 10.5067/GPM/DPR/Ku/2A, and 10.5067/GPM/DPR/Ka/2A for the 2A-DPR, 2A-Ku, and 2A-Ka, respectively) and the EumetSat Earth Observation Portal, respectively. The forward radar model code was courteously provided by R. Hogan (http://www.met.rdg.ac.uk/clouds/multiscatter/). Peer-reviewed Publisher Version Article in Journal/Newspaper North Atlantic University of Leicester: Leicester Research Archive (LRA) Journal of Geophysical Research: Atmospheres 120 9 4090 4101 |
institution |
Open Polar |
collection |
University of Leicester: Leicester Research Archive (LRA) |
op_collection_id |
ftleicester |
language |
English |
topic |
radar GPM-DPR multiple scattering graupel |
spellingShingle |
radar GPM-DPR multiple scattering graupel Battaglia, Alessandro Tanelli, S. Mroz, K. Tridon, Frederick Multiple scattering in observations of the GPM dual-frequency precipitation radar: Evidence and impact on retrievals |
topic_facet |
radar GPM-DPR multiple scattering graupel |
description |
This paper illustrates how multiple scattering signatures affect Global Precipitation Measuring (GPM) Mission Dual-Frequency Precipitation Radar (DPR) Ku and Ka band reflectivity measurements and how they are consistent with prelaunch assessments based on theoretical considerations and confirmed by airborne observations. In particular, in the presence of deep convection, certain characteristics of the dual-wavelength reflectivity profiles cannot be explained with single scattering, whereas they are readily explained by multiple-scattering theory. Examples of such signatures are the absence of surface reflectivity peaks and anomalously small reflectivity slopes in the lower troposphere. These findings are relevant for DPR-based rainfall retrievals and stratiform/convective classification algorithms when dealing with deep convective regions. A path to refining the rainfall inversion problem is proposed by adopting a methodology based on a forward operator which accounts for multiple scattering. A retrieval algorithm based on this methodology is applied to a case study over Africa, and it is compared to the standard DPR products obtained with the at-launch version of the standard algorithms. The work done by A. Battaglia and F. Tridon was funded by the project “Calibration and validation studies over the North Atlantic and UK for the Global Precipitation Mission,” which was funded by the UK NERC (NE/L007169/1). The work done by S. Tanelli was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. This work was carried out for the GPM mission under the Precipitation Measurement Missions program, and support by Ramesh Kakar is gratefully acknowledged. V03B-GPM and MSG data were downloaded from the Precipitation Processing System (DOI 10.5067/GPM/DPR/DPR/2A, 10.5067/GPM/DPR/Ku/2A, and 10.5067/GPM/DPR/Ka/2A for the 2A-DPR, 2A-Ku, and 2A-Ka, respectively) and the EumetSat Earth Observation Portal, respectively. The forward radar model code was courteously provided by R. Hogan (http://www.met.rdg.ac.uk/clouds/multiscatter/). Peer-reviewed Publisher Version |
format |
Article in Journal/Newspaper |
author |
Battaglia, Alessandro Tanelli, S. Mroz, K. Tridon, Frederick |
author_facet |
Battaglia, Alessandro Tanelli, S. Mroz, K. Tridon, Frederick |
author_sort |
Battaglia, Alessandro |
title |
Multiple scattering in observations of the GPM dual-frequency precipitation radar: Evidence and impact on retrievals |
title_short |
Multiple scattering in observations of the GPM dual-frequency precipitation radar: Evidence and impact on retrievals |
title_full |
Multiple scattering in observations of the GPM dual-frequency precipitation radar: Evidence and impact on retrievals |
title_fullStr |
Multiple scattering in observations of the GPM dual-frequency precipitation radar: Evidence and impact on retrievals |
title_full_unstemmed |
Multiple scattering in observations of the GPM dual-frequency precipitation radar: Evidence and impact on retrievals |
title_sort |
multiple scattering in observations of the gpm dual-frequency precipitation radar: evidence and impact on retrievals |
publisher |
American Geophysical Union (AGU) & Wiley |
publishDate |
2015 |
url |
http://onlinelibrary.wiley.com/doi/10.1002/2014JD022866/abstract http://hdl.handle.net/2381/32279 https://doi.org/10.1002/2014JD022866 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Journal of Geophysical Research: Atmospheres, 2015, 120 (9) pp 4090 - 4101. 2169-897X http://onlinelibrary.wiley.com/doi/10.1002/2014JD022866/abstract http://hdl.handle.net/2381/32279 doi:10.1002/2014JD022866 2169-8996 |
op_rights |
©2015. The Authors. This is an open access article under the terms of the Creative Commons Attribution License (CC BY 4.0) (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/2014JD022866 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
120 |
container_issue |
9 |
container_start_page |
4090 |
op_container_end_page |
4101 |
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1766136599275372544 |