http://lod.bco-dmo.org/id/dataset/949922
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2025-01-30
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Krill swarms detected with active acoustic EK80 onboard small boat surveys in Palmer Deep Canyon, Antarctica during January-March 2020
2025-01-30
publication
2025-01-30
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2025-01-30
publication
https://doi.org/10.26008/1912/bco-dmo.949922.1
Kim S. Bernard
Oregon State University
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Bernard, K. S., Hann, A., Veatch, J. (2025) Krill swarms detected with active acoustic EK80 onboard small boat surveys in Palmer Deep Canyon, Antarctica during January-March 2020. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-01-30 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.949922.1 [access date]
EK80 Antarctic Krill Swarms Dataset Description: Methods and Sampling: <p><!--[if gte mso 9]><xml> <o> <o/> </o:OfficeDocumentSettings> </xml><![endif]--><!--[if gte mso 9]><xml> <w> <w>Normal</w:View> <w>0</w:Zoom> <w/> <w/> <w/> <w/> <w>false</w:SaveIfXMLInvalid> <w>false</w:IgnoreMixedContent> <w>false</w:AlwaysShowPlaceholderText> <w/> <w>EN-US</w:LidThemeOther> <w>X-NONE</w:LidThemeAsian> <w>X-NONE</w:LidThemeComplexScript> <w> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> </w:Compatibility> <m> <m/> <m/> <m/> <m/> <m/> <m/> <m/> <m/> <m/> <m/> <m/> </m:mathPr></w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> <w/> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Aptos",sans-serif; mso-ascii-font-family:Aptos; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Aptos; mso-hansi-theme-font:minor-latin; mso-font-kerning:1.0pt; mso-ligatures:standardcontextual;} </style> <![endif]--></p>
<p>Day trip active acoustic surveys were conducted from Palmer Station Field Season aboard RHIB twice weekly from January-March 2020 using a hull-mounted SIMRAD EK80 single-beam, single frequency (120 kHz) echosounder (Kongsberg Maritime) along transects shown in Figure 1A (Veatch et al 2025).</p>
<p>The echosounder was configured with a 1 s ping rate, 512 µs pulse duration, and 24 µs sampling duration. Calibrations of the echosounder were performed in the vicinity of Palmer Deep Canyon using a tungsten sphere (diameter = 38.1 mm) during February, 2020. Acoustic data were processed in Myriax Echoview software version 11.1 following methods from (Tarling, Klevjer et al. 2009) and (Tarling, Thorpe et al. 2018). Raw data were processed to consider the echosounder calibration and in situ ocean acoustic conditions via incorporation of onboard CTD data, and to remove background noise and other interferences via the Background Noise Removal (De Robertis and Higginbottom 2007) and Impulse Noise Removal (Ryan, Downie et al. 2015) algorithms in Echoview. Krill were then detected using a target strength threshold of -70 dB to -30 dB(Tarling, Klevjer et al. 2009, Tarling, Thorpe et al. 2018) in Echoview following similar parameterization and protocols to (Nardelli, Cimino et al. 2021) and (Reiss, Cossio et al. 2021) (Figure 4, Veatch et al 2025).</p>
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-1745009 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1745009
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-1744884 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1744884
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-1745011 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1745011
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-1745018 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1745018
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-1745023 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1745023
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-1745081 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1745081
completed
Kim S. Bernard
Oregon State University
541-224-3741
104 CEOAS Admin Bldg
Corvallis
OR
97331
USA
kim.bernard@oregonstate.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Date_M
Time_M
iso8601
Lon_M
Lat_M
Depth_mean
Sv_mean
NASC
Height_mean
Thickness_mean
Length
mld
surface
SIMRAD EK80
theme
None, User defined
date
time of day
ISO_DateTime_UTC
longitude
latitude
depth
Acoustic backscatter in the water column
No BCO-DMO term
length
mixed layer depth
behavior code
featureType
BCO-DMO Standard Parameters
Simrad EK80 echo sounder
instrument
BCO-DMO Standard Instruments
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Collaborative Research: Physical Mechanisms Driving Food Web Focusing in Antarctic Biological Hotspots
https://osprey.bco-dmo.org/project/850844
Collaborative Research: Physical Mechanisms Driving Food Web Focusing in Antarctic Biological Hotspots
<p>NSF Award Abstract:<br />
Undersea canyons play disproportionately important roles as oceanic biological hotspots and are critical for our understanding of many coastal ecosystems. Canyon-associated biological hotspots have persisted for thousands of years Along the Western Antarctic Peninsula, despite significant climate variability. Observations of currents over Palmer Deep canyon, a representative hotspot along the Western Antarctic Peninsula, indicate that surface phytoplankton blooms enter and exit the local hotspot on scales of ~1-2 days. This time of residence is in conflict with the prevailing idea that canyon associated hotspots are primarily maintained by phytoplankton that are locally grown in association with these features by the upwelling of deep waters rich with nutrients that fuel the phytoplankton growth. Instead, the implication is that horizontal ocean circulation is likely more important to maintaining these biological hotspots than local upwelling through its physical concentrating effects. This project seeks to better resolve the factors that create and maintain focused areas of biological activity at canyons along the Western Antarctic Peninsula and create local foraging areas for marine mammals and birds. The project focus is in the analysis of the ocean transport and concentration mechanisms that sustain these biological hotspots, connecting oceanography to phytoplankton and krill, up through the food web to one of the resident predators, penguins. In addition, the research will engage with teachers from school districts serving underrepresented and underserved students by integrating the instructors and their students completely with the science team. Students will conduct their own research with the same data over the same time as researchers on the project. Revealing the fundamental mechanisms that sustain these known hotspots will significantly advance our understanding of the observed connection between submarine canyons and persistent penguin population hotspots over ecological time, and provide a new model for how Antarctic hotspots function.</p>
<p>
To understand the physical mechanisms that support persistent hotspots along the Western Antarctic Peninsula (WAP), this project will integrate a modeling and field program that will target the processes responsible for transporting and concentrating phytoplankton and krill biomass to known penguin foraging locations. Within the Palmer Deep canyon, a representative hotspot, the team will deploy a High Frequency Radar (HFR) coastal surface current mapping network, uniquely equipped to identify the eddies and frontal regions that concentrate phytoplankton and krill. The field program, centered on surface features identified by the HFR, will include (i) a coordinated fleet of gliders to survey hydrography, chlorophyll fluorescence, optical backscatter, and active acoustics at the scale of the targeted convergent features; (ii) precise penguin tracking with GPS-linked satellite telemetry and time-depth recorders (TDRs); (iii) and weekly small boat surveys that adaptively target and track convergent features to measure phytoplankton, krill, and hydrography. A high resolution physical model will generalize our field measurements to other known hotspots along the WAP through simulation and determine which physical mechanisms lead to the maintenance of these hotspots. The project will also engage educators, students, and members of the general public in Antarctic research and data analysis with an education program that will advance teaching and learning as well as broadening participation of under-represented groups. This engagement includes professional development workshops, live connections to the public and classrooms, student research symposia, and program evaluation. Together the integrated research and engagement will advance our understanding of the role regional transport pathways and local depth dependent concentrating physical mechanisms play in sustaining these biological hotspots.</p>
<p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p>
Project SWARM
largerWorkCitation
project
eng; USA
oceans
-64.27354803
-63.77062609
-64.9104786
-64.79720121
2020-01-15
2020-03-10
West Antarctic Peninsula
0
BCO-DMO catalogue of parameters from Krill swarms detected with active acoustic EK80 onboard small boat surveys in Palmer Deep Canyon, Antarctica during January-March 2020
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/949954.rdf
Name: Date_M
Units: unitless
Description: <p>Day of observation in YYYMMDD format</p>
http://lod.bco-dmo.org/id/dataset-parameter/949955.rdf
Name: Time_M
Units: unitless
Description: <p>Time of observation, fraction of day</p>
http://lod.bco-dmo.org/id/dataset-parameter/949956.rdf
Name: iso8601
Units: unitless
Description: <p>Date and time of observation in ISO format: yyyy-MM-dd HH:mm:ss (GMT timezone)</p>
http://lod.bco-dmo.org/id/dataset-parameter/949957.rdf
Name: Lon_M
Units: decimal degrees
Description: <p>Longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/949958.rdf
Name: Lat_M
Units: decimal degrees
Description: <p>Latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/949959.rdf
Name: Depth_mean
Units: Meters (m)
Description: <p>Average depth of krill swarm measured from ocean surface</p>
http://lod.bco-dmo.org/id/dataset-parameter/949960.rdf
Name: Sv_mean
Units: dB
Description: <p>Average Backscatter (dB)</p>
http://lod.bco-dmo.org/id/dataset-parameter/949961.rdf
Name: NASC
Units: m²/nmi²
Description: <p>Nautical Acoustic Scattering Coefficient</p>
http://lod.bco-dmo.org/id/dataset-parameter/949962.rdf
Name: Height_mean
Units: Meters (m)
Description: <p>Vertical length of swarm</p>
http://lod.bco-dmo.org/id/dataset-parameter/949963.rdf
Name: Thickness_mean
Units: Meters (m)
Description: <p>Horizontal across-track length of swarm</p>
http://lod.bco-dmo.org/id/dataset-parameter/949964.rdf
Name: Length
Units: Meters (m)
Description: <p>Horizontal along-track length of swarm</p>
http://lod.bco-dmo.org/id/dataset-parameter/949965.rdf
Name: mld
Units: Meters (m)
Description: <p>Mixed layer depth as measured by ACROBAT (associated dataset)</p>
http://lod.bco-dmo.org/id/dataset-parameter/949966.rdf
Name: surface
Units: Binary
Description: <p>Binary swarm above or below mld</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
675405
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/c317a586-e8e6-4336-9479-6efc1eff7fc9/content
download
https://doi.org/10.26008/1912/bco-dmo.949922.1
download
onLine
dataset
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<p>Day trip active acoustic surveys were conducted from Palmer Station Field Season aboard RHIB twice weekly from January-March 2020 using a hull-mounted SIMRAD EK80 single-beam, single frequency (120 kHz) echosounder (Kongsberg Maritime) along transects shown in Figure 1A (Veatch et al 2025).</p>
<p>The echosounder was configured with a 1 s ping rate, 512 µs pulse duration, and 24 µs sampling duration. Calibrations of the echosounder were performed in the vicinity of Palmer Deep Canyon using a tungsten sphere (diameter = 38.1 mm) during February, 2020. Acoustic data were processed in Myriax Echoview software version 11.1 following methods from (Tarling, Klevjer et al. 2009) and (Tarling, Thorpe et al. 2018). Raw data were processed to consider the echosounder calibration and in situ ocean acoustic conditions via incorporation of onboard CTD data, and to remove background noise and other interferences via the Background Noise Removal (De Robertis and Higginbottom 2007) and Impulse Noise Removal (Ryan, Downie et al. 2015) algorithms in Echoview. Krill were then detected using a target strength threshold of -70 dB to -30 dB(Tarling, Klevjer et al. 2009, Tarling, Thorpe et al. 2018) in Echoview following similar parameterization and protocols to (Nardelli, Cimino et al. 2021) and (Reiss, Cossio et al. 2021) (Figure 4, Veatch et al 2025).</p>
Specified by the Principal Investigator(s)
<p>All acoustically detected krill swarms were manually reviewed before exporting the acoustic data in NASC (Nautical Area Scattering Coefficient) values, a common proxy for organism presence in acoustic measurements. NASC values were calculated per detected swarm and exported along with depth, GPS position (longitude and latitude), swarm height, swarm length, and backscatter (Sv). These methods for acoustic surveys and processing of subsequent acoustic data follow those in (Hann, Bernard et al. 2023).</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
SIMRAD EK80
SIMRAD EK80
PI Supplied Instrument Name: SIMRAD EK80 PI Supplied Instrument Description:Hull-mounted SIMRAD EK80 single-beam, single frequency (120 kHz) echosounder (Kongsberg Maritime) Instrument Name: Simrad EK80 echo sounder Instrument Short Name:EK80 Instrument Description: A high precision scientific echo sounder, designed to simultaneously operate frequencies ranging from 10 to 500 kHz. EK80 is a modular echo sounder system, and can operate with a combination of split and single beam transducers facilitated by a built-in calibration application. This system was built in succession to the EK60 echo sounder.