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Griesche, Hannes; Seifert, Patric; Engelmann, Ronny; Radenz, Martin; Bühl, Johannes (2019): Cloudnet LWC during POLARSTERN cruise PS106 [dataset]. Leibniz-Institut für Troposphärenforschung e.V., Leipzig, PANGAEA, https://doi.org/10.1594/PANGAEA.900106

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Abstract:
The dataset contains daily nc-files of the Cloudnet liquid water content during Polarstern cruise PS106.
The data is retrieved using the instrument synergystic approach Cloudnet (Illingworth, 2007, doi:10.1175/BAMS-88-6-883).
This variable was calculated for the profiles where the \"categorization\" data has diagnosed that liquid water is present and liquid water path is available from a coincident microwave radiometer. The model temperature and pressure were used to estimate the
theoretical adiabatic liquid water content gradient for each cloud base and the adiabatic liquid water content is then scaled so that its integral matches the radiometer measurement so that the liquid water content now follows a quasi-adiabatic profile. If the liquid layer is detected by the lidar only, there is the potential for cloud top height to be underestimated and so if the adiabatic integrated liquid water content is less than that measured by the microwave radiometer, the cloud top is extended until the adiabatic integrated liquid water content agrees with the value measured by the microwave radiometer.
Missing values indicate that either
1) a liquid water layer was diagnosed but no microwave radiometer data was available,
2) a liquid water layer was diagnosed but the microwave radiometer data was unreliable; this may be because a melting layer was present in the profile, or because the retrieved lwp was unphysical (values of zero are not uncommon for thin supercooled liquid layers), or
3) that rain is present in the profile and therefore, the vertical extent of liquid layers is difficult to ascertain.
Keyword(s):
Cloudnet; LWC; OCEANET-ATMOSPHERE; PASCAL; PS106
Further details:
Illingworth, Anthony J; Hogan, Robin J; O'Connor, E J; Bouniol, D; Brooks, M E; Delanoé, J; Donovan, D P; Eastment, J D; Gaussiat, N; Goddard, J W F; Haeffelin, Martial; Klein Baltink, H; Krasnov, O A; Pelon, J; Piriou, J-M; Protat, Alain; Russchenberg, H W J; Seifert, A; Tompkins, A M; van Zadelhoff, G-J; Vinit, F; Willén, U; Wilson, D R; Wrench, C L (2007): Cloudnet: Continuous Evaluation of Cloud Profiles in Seven Operational Models Using Ground-Based Observations. Bulletin of the American Meteorological Society, 88(6), 883-898, https://doi.org/10.1175/BAMS-88-6-883
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 268020496: TRR 172: ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms
Coverage:
Median Latitude: 73.557710 * Median Longitude: 13.412315 * South-bound Latitude: 57.059650 * West-bound Longitude: 5.402260 * North-bound Latitude: 79.842110 * East-bound Longitude: 27.113210
Date/Time Start: 2017-05-24T00:00:00 * Date/Time End: 2017-07-18T00:00:00
Minimum Elevation: -512.0 m * Maximum Elevation: -46.6 m
Event(s):
PS106_0_Underway-11 * Latitude Start: 57.059650 * Longitude Start: 5.402260 * Latitude End: 79.842110 * Longitude End: 8.560310 * Date/Time Start: 2017-05-24T00:00:00 * Date/Time End: 2017-06-22T00:00:00 * Elevation Start: -46.6 m * Elevation End: -512.0 m * Campaign: PS106/1 (ARK-XXXI/1.1,PASCAL) * Basis: Polarstern * Method/Device: Remote sensing (Light detection and ranging, LiDAR) (LiDAR)
PS106_0_Underway-17 * Latitude Start: 77.971190 * Longitude Start: 12.573480 * Latitude End: 79.357890 * Longitude End: 27.113210 * Date/Time Start: 2017-06-23T16:15:00 * Date/Time End: 2017-07-15T20:00:00 * Elevation Start: -161.0 m * Elevation End: -286.0 m * Campaign: PS106/1 (ARK-XXXI/1.1,PASCAL) * Basis: Polarstern * Method/Device: Remote sensing (Light detection and ranging, LiDAR) (LiDAR)
Comment:
Please note: a newer Version is available, see "Replaced by" reference
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventGriesche, Hannes
2DATE/TIMEDate/TimeGriesche, HannesGeocode
3File nameFile nameGriesche, Hannes
4File formatFile formatGriesche, Hannes
5File sizeFile sizekByteGriesche, Hannes
6Uniform resource locator/link to fileURL fileGriesche, Hannes
Size:
220 data points

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