Citation:

PANGAEA.954939

Name: Hydroacoustic backscatter recorded by buoy 2020AZFP1 in the central Arctic Ocean during Sep 2020 - May 2021
Published: 2023-05-01
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Arctic PASSION; central Arctic Ocean; Hydroacoustic backscatter; Mosaic; MOSAIC_PO; vertical migration; Zooplankton

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Abstract:

This dataset contains hydroacoustic measurements collected by an autonomous ice-tethered bio-physical observatory during its drift across the Central Arctic Ocean from the end of MOSAiC in September 2020 to the next spring in May 2021. The measurements were performed by an Acoustic Zooplankton and Fish Profiler (AZFP, ASL) with factory calibrations. Data are provided as volume backscatter (Sv, in dB re 1 m⁻¹). We provide data for the frequencies 67, 125, 200 and 455 kHz. These files contain the quality-controlled raw data. The data were cleaned, processed and analysed in the paper Sea-ice decline makes zooplankton stay deeper for longer by Flores, Veyssiere et al. (submitted to Nature Cliimate Change), which contains a detailed description of the instrument and the measurement settings. The format can be readily ingested in the hydroacoustic data processing application EchoView.

Keyword(s):

Arctic PASSION; central Arctic Ocean; Hydroacoustic backscatter; Mosaic; MOSAIC_PO; vertical migration; Zooplankton

Supplement to:

Flores, Hauke; Veyssière, Gaëlle; Castellani, Giulia; Wilkinson, Jeremy; Hoppmann, Mario; Karcher, Michael J; Valcic, Lovro; Cornils, Astrid; Geoffroy, Maxime; Nicolaus, Marcel; Niehoff, Barbara; Priou, Pierre; Schmidt, Katrin; Stroeve, Julienne C (2023): Sea-ice decline could keep zooplankton deeper for longer. Nature Climate Change, 13(10), 1122-1130, https://doi.org/10.1038/s41558-023-01779-1

Project(s):

Ecosystem functions controlled by sea ice and light in a changing Arctic (ECOLIGHT)

FRontiers in Arctic marine Monitoring (FRAM)

Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC)

Multidisciplinary Ice-based Distributed Observatory (MIDO)

Pan-Arctic observing System of Systems: Implementing Observations for societal Needs (Arctic_PASSION)

Funding:

Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AFMOSAiC-1_00: Multidisciplinary drifting Observatory for the Study of Arctic Climate

Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_PS122_00: Multidisciplinary drifting Observatory for the Study of Arctic Climate / MOSAiC

Federal Ministry of Education and Research (BMBF), grant/award no. 03V01465: Ecolight

Horizon 2020 (H2020), grant/award no. 101003472 : Pan-Arctic observing System of Systems: Implementing Observations for societal Needs (Arctic PASSION)

Natural Environment Research Council (NERC), grant/award no. NE/R012725/1 : Ecosystem functions controlled by sea ice and light in a changing Arctic (Eco-Light)

Coverage:

Median Latitude: 85.268941 * Median Longitude: 46.437165 * South-bound Latitude: 81.767659 * West-bound Longitude: -8.668796 * North-bound Latitude: 88.770223 * East-bound Longitude: 101.543127

Date/Time Start: 2020-09-12T07:56:50 * Date/Time End: 2021-05-07T15:48:29

Minimum Elevation: -4305.8 m * Maximum Elevation: -4305.8 m

Event(s):

PS122/5_58-163 (2020AZFP1) * Latitude Start: 88.770223 * Longitude Start: 101.543127 * Latitude End: 81.767659 * Longitude End: -8.668796 * Date/Time Start: 2020-09-12T07:56:50 * Date/Time End: 2021-05-07T15:48:29 * Elevation: -4305.8 m * Sensor URI: sensor.awi.de * Location: Arctic Ocean * Campaign: (MOSAiC20192020) * Basis: * Method/Device: Acoustical Zoological Fish Profiler (AZFP) * Comment: signal lost

Parameter(s):

#	Name	Short Name	Principal Investigator	Comment
1	File content	Content	Flores, Hauke
2	DATE/TIME	Date/Time	Flores, Hauke	Geocode – start
3	DATE/TIME	Date/Time	Flores, Hauke	Geocode – end
4	LATITUDE	Latitude	Flores, Hauke	Geocode – start
5	LATITUDE	Latitude	Flores, Hauke	Geocode – end
6	LONGITUDE	Longitude	Flores, Hauke	Geocode – start
7	LONGITUDE	Longitude	Flores, Hauke	Geocode – end
8	Binary Object	Binary	Flores, Hauke

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Basic curation (CurationLevelB) * Processing Level: PANGAEA data processing level 1 (ProcLevel1)

Size:

8 data points

Data

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1 Content	2 Date/Time (start)	3 Date/Time (end)	4 Latitude (start)	5 Latitude (end)	6 Longitude (start)	7 Longitude (end)	8 Binary
Frequency 125 kHz	2020-09-12T07:56:50	2021-05-07T15:48:29	88.770050	81.767659	101.472550	-8.668796	125Khz_allcells_SNR10_IR_06dec2021.sv.csv
Frequency 200 kHz	2020-09-12T07:56:50	2021-05-07T15:48:29	88.770050	81.767659	101.472550	-8.668796	200Khz_allcells_SNR10_IR_06dec2021.sv.csv
Frequency 455 kHz	2020-09-12T07:56:50	2021-05-07T15:48:29	88.770050	81.767659	101.472550	-8.668796	455Khz_allcells_SNR10_IR_06dec2021.sv.csv
Frequency 67 kHz	2020-09-12T07:56:50	2021-05-07T15:48:29	88.770050	81.767659	101.472550	-8.668796	67Khz_allcells_SNR10_IR_06dec2021.sv.csv