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Synergistic radar and sub-millimeter radiometer retrievals of ice hydrometeors in mid-latitude frontal cloud systems

Pfreundschuh, Simon und Fox, Stuart und Eriksson, Patrick und Duncan, David und Buehler, Stefan A. und Brath, Manfred und Cotton, Richard und Ewald, Florian (2022) Synergistic radar and sub-millimeter radiometer retrievals of ice hydrometeors in mid-latitude frontal cloud systems. Atmospheric Measurement Techniques (AMT), 15 (3), Seiten 677-699. Copernicus Publications. doi: 10.5194/amt-15-677-2022. ISSN 1867-1381.

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Offizielle URL: https://dx.doi.org/10.5194/amt-15-677-2022

Kurzfassung

Accurate measurements of ice hydrometeors are required to improve the representation of clouds and precipitation in weather and climate models. In this study, a newly developed, synergistic retrieval algorithm that combines radar with passive millimeter and sub-millimeter observations is applied to observations of three frontally generated, mid-latitude cloud systems in order to validate the retrieval and assess its capabilities to constrain the properties of ice hydrometeors. To account for uncertainty in the assumed shapes of ice particles, the retrieval is run multiple times while the shape is varied. Good agreement with in situ measurements of ice water content and particle concentrations for particle maximum diameters larger than 200 micron is found for one of the flights for the large plate aggregate and the six-bullet rosette shapes. The variational retrieval fits the observations well, although small systematic deviations are observed for some of the sub-millimeter channels pointing towards issues with the sensor calibration or the modeling of gas absorption. For one of the flights the quality of the fit to the observations exhibits a weak dependency on the assumed ice particle shape, indicating that the employed combination of observations may provide limited information on the shape of ice particles in the observed clouds. Compared to a radar-only retrieval, the results show an improved sensitivity of the synergistic retrieval to the microphysical properties of ice hydrometeors at the base of the cloud. Our findings indicate that the synergy between active and passive microwave observations may improve remote-sensing measurements of ice hydrometeors and thus help to reduce uncertainties that affect currently available data products. Due to the increased sensitivity to their microphysical properties, the retrieval may also be a valuable tool to study ice hydrometeors in field campaigns. The good fits obtained to the observations increase confidence in the modeling of clouds in the Atmospheric Radiative Transfer Simulator and the corresponding single scattering database, which were used to implement the retrieval forward model. Our results demonstrate the suitability of these tools to produce realistic simulations for upcoming sub-millimeter sensors such as the Ice Cloud Image or the Arctic Weather Satellite.

elib-URL des Eintrags:https://elib.dlr.de/185553/
Dokumentart:Zeitschriftenbeitrag
Titel:Synergistic radar and sub-millimeter radiometer retrievals of ice hydrometeors in mid-latitude frontal cloud systems
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Pfreundschuh, SimonDepartment of Space, Earth and Environment, Chalmers University of Technology, Gothenburg, Swedenhttps://orcid.org/0000-0001-6566-2732NICHT SPEZIFIZIERT
Fox, StuartMet Office, FitzRoy Road, Exeter, EX1 3PB, UKhttps://orcid.org/0000-0003-3110-872XNICHT SPEZIFIZIERT
Eriksson, PatrickDepartment of Space, Earth and Environment, Chalmers University of Technology, Gothenburg, Swedenhttps://orcid.org/0000-0002-8475-0479NICHT SPEZIFIZIERT
Duncan, DavidECMWF, Reading, RG2 9AX, UKhttps://orcid.org/0000-0002-1955-4391NICHT SPEZIFIZIERT
Buehler, Stefan A.Meteorologisches Institut, (CEN), Universität Hamburg, Germanyhttps://orcid.org/0000-0001-6389-1160NICHT SPEZIFIZIERT
Brath, ManfredMeteorologisches Institut, (CEN), Universität Hamburg, Germanyhttps://orcid.org/0000-0003-4898-3811NICHT SPEZIFIZIERT
Cotton, RichardMet Office, FitzRoy Road, Exeter, EX1 3PB, UKNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Ewald, FlorianDLR, IPAhttps://orcid.org/0000-0002-5899-0890NICHT SPEZIFIZIERT
Datum:9 Februar 2022
Erschienen in:Atmospheric Measurement Techniques (AMT)
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:15
DOI:10.5194/amt-15-677-2022
Seitenbereich:Seiten 677-699
Verlag:Copernicus Publications
ISSN:1867-1381
Status:veröffentlicht
Stichwörter:Radar, Sub-millimeter, Retrieval, Synergy, Ice cloud microphysics
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Atmosphären- und Klimaforschung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Lidar
Hinterlegt von: Ewald, Dr. Florian
Hinterlegt am:08 Mär 2022 09:00
Letzte Änderung:08 Mär 2022 09:00

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