Müller, Joshua; Klingebiel, Marcus; Jäkel, Evelyn; Mech, Mario; Wendisch, Manfred (2026): Aircraft measurements of broadband irradiances onboard Polar 5 during the COMPEX-EC campaign in spring 2025 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.988461
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2026-01-12 • DOI registered: 2026-02-12
Abstract:
During the COMPEX-EC campaign performed in April 2025, broadband solar and thermal-infrared irradiances in the Norwegian Sea were measured by a pair of CMP22 (0.2-3.6 µm) and CGR4 (4.5-42 µm) radiometers (Kipp&Zonen), respectively, onboard Polar 5. The data set contains time series of both upward and downward solar and thermal-infrared irradiances obtained during in total 7 research flights. All irradiances were corrected for instrument inertia (Ehrlich and Wendisch, 2015), the solar downward irradiance additionally for the aircraft attitude (Bannehr and Schwiesow, 1993). Since the latter correction is only valid for cloud-free conditions dominated by direct illumination, both a corrected and an uncorrected version are given. A rough cloud flag is included in the data set to distinguish between situations dominated by direct and diffuse illumination. To avoid too large uncertainties, the attitude flag can be used to filter situations with aircraft attitude angles (roll, pitch) exceeding 5°. The data set further contains the solar downward irradiance simulated for cloud-free conditions and the upward brightness temperature measured by the KT-19 infrared thermometer (HEITRONICS, 9.6-11.5 µm).
Related to:
Mech, Mario; Bruder, Lena; Klingebiel, Marcus (2025): Master tracks in different resolutions during POLAR 5 campaign P5-256_COMPEX-EC_2025 [dataset publication series]. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.982817
Mech, Mario; Klingebiel, Marcus; Crewell, Susanne; Ehrlich, André; Bruder, Lena; Buhren, Christian; Gebhard, Eduard; van Gelder, Lars; Jansen, Friedhelm; Ludwig, Dennis; Müller, Joshua: Collection of data sets for the Clouds over cOMPlEX environment - EarthCARE (COMPEX-EC) campaign, carried out in Kiruna in spring 2025 [dataset bibliography]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.983187
Project(s):
Arctic Amplification (AC3)
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: 67.821835 * Median Longitude: 20.327558 * South-bound Latitude: 67.821645 * West-bound Longitude: 20.327129 * North-bound Latitude: 67.822004 * East-bound Longitude: 20.327969
Date/Time Start: 2025-04-04T10:39:47 * Date/Time End: 2025-04-15T15:46:27
Event(s):
P5-256_COMPEX-EC_2025_2504040201 * Latitude Start: 67.821939 * Longitude Start: 20.327570 * Latitude End: 67.822004 * Longitude End: 20.327969 * Date/Time Start: 2025-04-04T10:39:47 * Date/Time End: 2025-04-04T16:05:47 * Campaign: P5-256_COMPEX-EC_2025 * Basis: POLAR 5 * Method/Device: Aircraft (AC)
P5-256_COMPEX-EC_2025_2504060301 * Latitude Start: 67.821986 * Longitude Start: 20.327634 * Latitude End: 67.821877 * Longitude End: 20.327808 * Date/Time Start: 2025-04-06T12:04:14 * Date/Time End: 2025-04-06T16:27:14 * Campaign: P5-256_COMPEX-EC_2025 * Basis: POLAR 5 * Method/Device: Aircraft (AC)
P5-256_COMPEX-EC_2025_2504070401 * Latitude Start: 67.821913 * Longitude Start: 20.327732 * Latitude End: 67.821921 * Longitude End: 20.327668 * Date/Time Start: 2025-04-07T11:41:49 * Date/Time End: 2025-04-07T16:01:48 * Campaign: P5-256_COMPEX-EC_2025 * Basis: POLAR 5 * Method/Device: Aircraft (AC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Müller, Joshua | |||
| 2 | Date/Time of event | Date/Time | Müller, Joshua | |||
| 3 | Date/Time of event 2 | Date/Time 2 | Müller, Joshua | |||
| 4 | netCDF file | netCDF | Müller, Joshua | Radiometers, Kipp & Zonen, CMP22 (0.2-3.6 µm) and CGR4 (4.5-42 µm) | ||
| 5 | netCDF file (File Size) | netCDF (Size) | Bytes | Müller, Joshua | Radiometers, Kipp & Zonen, CMP22 (0.2-3.6 µm) and CGR4 (4.5-42 µm) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
7 data points
Data
All files referred to in data matrix can be downloaded in one go as ZIP or TAR. Be careful: This download can be very large! To protect our systems from misuse, we require to sign up for an user account before downloading.
| 1 Event | 2 Date/Time | 3 Date/Time 2 | 4 netCDF | 5 netCDF (Size) [Bytes] |
|---|---|---|---|---|
| P5-256_COMPEX-EC_2025_2504040201 | 2025-04-04T10:39:47 | 2025-04-04T16:05:47 | RF01.nc | 51.6 MBytes |
| P5-256_COMPEX-EC_2025_2504060301 | 2025-04-06T12:04:14 | 2025-04-06T16:27:14 | RF02.nc | 41.7 MBytes |
| P5-256_COMPEX-EC_2025_2504070401 | 2025-04-07T11:41:49 | 2025-04-07T16:01:48 | RF03.nc | 41.3 MBytes |
| P5-256_COMPEX-EC_2025_2504080501 | 2025-04-08T11:47:50 | 2025-04-08T16:02:48 | RF04.nc | 40.4 MBytes |
| P5-256_COMPEX-EC_2025_2504110601 | 2025-04-11T11:53:36 | 2025-04-11T15:30:34 | RF05.nc | 34.5 MBytes |
| P5-256_COMPEX-EC_2025_2504130701 | 2025-04-13T10:25:04 | 2025-04-13T15:45:04 | RF06.nc | 50.6 MBytes |
| P5-256_COMPEX-EC_2025_2504150801 | 2025-04-15T10:39:29 | 2025-04-15T15:46:27 | RF07.nc | 48.6 MBytes |