Global Change Master Directory (GCMD)

Data Sets

Services / Tools

Ancillary Descriptions

Are you using a browser that doesn't support JavaScript or have you disabled JavaScript?

If you have disabled JavaScript, you must re-enable JavaScript to use this page.
Or you can view this record using the Text Only Format.

Nearshore Krill Ecosystem at Livingston Island

Entry ID: livingston_island_nearshore

[ Update this Record ]

Summary

Abstract: 2005 Field season: During 1-10 February, the RV Ernest surveyed over 275 n. mi. collecting acoustic backscatter data. At the same time, the RV Yuzhmorgeologiya completed nearly three passes through the nearshore-to-shelf-break survey grid. Stations throughout the survey were occupied at night where CTD and net tow stations were conducted. Also included in this field season were preliminary tests ... of a AUV (Fetch I, Sias-Patterson) which was deployed to conduct bathymetry mapping and determine whether krill swarms could be detected by the vehicle. The AUV work was conducted with Dr. Mark Patterson of VIMS and Sias-Patterson and the Advanced Survey Technologies group at SWFSC led by Dr. David Demer. Except for a near gale which occurred exactly mid-way during the survey period, good weather allowed for extensive survey effort. In addition, instrumented buoys were deployed to test a new engineering design of the buoys used in previous field seasons. Due to technical issues, only limited data were collected during the buoy deployment.

2006 Field season: During 1-10 February, the RV Ernest surveyed over 264 n. mi. collecting acoustic backscatter data. At the same time, the RV Yuzhmorgeologiya completed two passes through the nearshore-to-shelf-break survey grid. Stations throughout the survey were occupied at night where CTD and net tow stations were conducted. An additional small vessel (RV Roald) was deployed with a SIMRAD MS 20 Multibeam echosounder to map bathymetry of the nearshore area and to study krill swarm characteristics. Joint operations (specific survey lines) were conducted with all three vessels). Poor weather and sea state conditions resulted in the loss of two days of survey effort at the beginning and 1 day at the end of the period. We still managed to conduct a comparable amount of survey effort as in 2005 due to few (if any) equipment or vessel malfunctions. Instrumented buoys were deployed and collected data over several days of the survey period.

2007 Field season: During 28 January to 1 February, the RV Ernest surveyed approximately 55 n.mi. collecting acoustic backscatter data. At the same time, the RV Yuzhmorgeologiya completed slightly more than one pass through the nearshore-to-shelf-break survey grid. Stations throughout the survey were occupied at night where CTD and net tow stations were conducted. An additional small vessel (RV Roald) was deployed with a SIMRAD MS 20 Multibeam echosounder to map bathymetry of the nearshore area and to study krill swarm characteristics. Joint operations (specific survey lines) were conducted with the two smaller vessels).The shorter survey period during this field season was a combination of several factors: reduced shiptime for the AMLR survey due to NOAA budgetary constraints (10 day survey period reduced to 7 days) and a combination of weather delays during the AMLR broad area survey and problems with the calibration of the RV Yuzhmorgeologiya echosounder system (7 to 5 days). In addition, during our reduced survey window, we experienced extremely poor weather and dangerous sea conditions which forced us to remain on shore and also damaged equipment when we did venture out. Despite these conditions, we were able to collect data from all three research vessels (Ernest, Roald, Yuzhmorgeologiya) to provide a 3rd year of data for this project. One instrumented buoy was deployed at the start of the nearshore survey period and collected data throughout the survey period.

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

	N: -62.0	S: -62.6	E: -60.4	W: -62.0
Min Altitude: 0M Max Altitude: 0M
Min Depth: 0M Max Depth: 750M

Temporal Coverage

Start Date: 2005-02-01

Stop Date: 2005-02-10

Location Keywords

OCEAN > SOUTHERN OCEAN

CONTINENT > ANTARCTICA

GEOGRAPHIC REGION > POLAR

Data Resolution

Latitude Resolution: 50 m to 5 km
Longitude Resolution: 50 m to 5 km
Horizontal Resolution Range: Point Resolution
Vertical Resolution: 1m
Vertical Resolution Range: Point Resolution
Temporal Resolution: 2 s to 3 days

Science Keywords

OCEANS > OCEAN ACOUSTICS > ACOUSTIC SCATTERING

BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > EUPHAUSIIDS (KRILL)
BIOSPHERE > AQUATIC ECOSYSTEMS > PLANKTON > ZOOPLANKTON

ISO Topic Category

OCEANS

Platform

SHIPS

Instrument

CTD > Conductivity, Temperature, Depth

PLANKTON NETS

ACOUSTIC SOUNDERS

Project

NSF/OPP > Office of Polar Programs, National Science Foundation

LINKES > LIVINGSTON ISLAND NEARSHORE KRILL ECOSYSTEM STUDY

Quality CTD data are from calibrated instruments although some sensors were changed in middle of sampling period.

Acoustic systems were calibrated in situ or during post-processing. Engine noise from vessel causes contamination of data below 150 m.

Data Set Progress

IN WORK

Data Center

School of Marine and Atmospheric Sciences, Stony Brook University

Data Center URL: http://www.msrc.sunysb.edu/
Dataset ID: Livingston Island Nearshore 2005-2007

Data Center Personnel
Name: JOSEPH D. WARREN Phone: 631-632-5045 Fax: 631-632-5070 Email: joe.warren at stonybrook.edu Contact Address: School of Marine and Atmospheric Sciences Stony Brook University City: Stony Brook Province or State: NY Postal Code: 11794 Country: USA

Distribution

Distribution Media: DVD

Distribution Size: ~ 15 GB

Fees: Cost of Media and Duplication Time

Personnel

JOSEPH D. WARREN

Role: DIF AUTHOR

Phone: 631-632-5045

Fax: 631-632-5070

Email: joe.warren at stonybrook.edu

Contact Address:

School of Marine and Atmospheric Sciences

Stony Brook University

City: Stony Brook

Province or State: NY

Postal Code: 11794

Country: USA

Creation and Review Dates

DIF Creation Date: 2008-03-11

Last DIF Revision Date: 2010-07-07

Reformat as FGDC document

View Text Only Format

[ Update this Record ]