Okeanos Explorer (EX2304): Seascape Alaska 3: Aleutians Remotely Operated Vehicle Exploration and Mapping

Data as a DwC-A file	download 8 records in English (1 MB) - Update frequency: unknown
Metadata as an EML file	download in English (12 KB)
Metadata as an RTF file	download in English (12 KB)

Description

From July 14 - July 25, 2023 (Kodiak, Alaska to Unalaska, Alaska), NOAA Ocean Exploration completed the Seascape Alaska 3: Aleutians Remotely Operated Vehicle Exploration and Mapping expedition (EX2304), a combined mapping and remotely operated vehicle (ROV) expedition exploring the deep waters around the Aleutian Islands. Operations during this 12-day expedition included the completion of eight ROV exploration dives, including six full dives and two dives that were abandoned during descent due to various circumstances. ROV dives were conducted in water depths ranging from 780 m to 2800 m for a total of nearly 27 hours of bottom time (not including mid-water transects), focusing on exploring benthic habitats (including seep communities), geohazards, and water column communities. EX2304 also collected over 15,000 square kilometers of seafloor bathymetry and associated water column data using an EM 304 multibeam sonar. All data associated with this expedition will be archived within 120 days of the end of the expedition and will be publicly available through the NOAA Archives. This research used data collected during NOAA Ship Okeanos Explorer expedition EX2304, led by NOAA Ocean Exploration. Taxonomic identifications provided by the Deep-sea Animal Research Center at University of Hawai'i at Manoa. Additional Data Resources: Project website: https://oceanexplorer.noaa.gov/expedition/ex2304/ Expedition report: https://repository.library.noaa.gov/view/noaa/70924 Data was archived with NOAA’s National Centers for Environmental Information (NCEI): https://www.ncei.noaa.gov/waf/okeanos-rov-cruises/ex2304/ Annotation dataset (provided by DARC) archived with NCEI: https://oer.hpc.msstate.edu/okeanos/ex2304/Eventlogs/VideoAnnotations-Version2/Specimen/ Sample Data: Sample records archived at NCEI: https://www.ncei.noaa.gov/data/oceans/archive/arc0241/0311845/1.1/data/0-data/EX_SODA_Archive_September_2025/exports/EX2304_Cruise_Specimens.xlsxBiological samples were sent to the Smithsonian National Museum of Natural History (SNMNH): https://collections.nmnh.si.edu/search/iz/Geological samples were sent to Oregon State University’s Marine Geological Repository: https://osu-mgr.org/noaa-exWater collected and filtered for eDNA analyses were sent to the SNMNH. Sample catalog numbers: https://geome-db.org/record/ark:/21547/FjJ2

Data Records

The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 8 records.

2 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.

82092

13728

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.

Versions

The table below shows only published versions of the resource that are publicly accessible.

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is NOAA Ocean Exploration. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 9c3dc69b-1e8a-42ea-ad51-1f686f8f3e43. NOAA Ocean Exploration publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF-US.

Keywords

Samplingevent

External data

The resource data is also available in other formats

EX2304_Cruise_Specimens.xlsx	https://www.ncei.noaa.gov/data/oceans/archive/arc0241/0311845/1.1/data/0-data/EX_SODA_Archive_September_2025/exports/EX2304_Cruise_Specimens.xlsx ASCII Excel
EX2304_Annotations	https://oer.hpc.msstate.edu/okeanos/ex2304/Eventlogs/VideoAnnotations-Version2/ ASCII Excel

Contacts

NOAA Ocean Exploration

Deep Sea Animal Research Center at University of Hawai'i at Manoa

Ashley Marranzino

Distributor

NOAA Ocean Exploration Affiliate

https://orcid.org/https://orcid.org/0000-0002-6451-1139

Geographic Coverage

Aleutian Islands, Alaska

Bounding Coordinates	South West [50, -170], North East [58, -150]

Temporal Coverage

Start Date / End Date	2023-07-14 / 2023-07-25

Sampling Methods

ROV expeditions are conducted according to procedures as outlined by Galvez et al., 2025: https://repository.library.noaa.gov/view/noaa/70281.

Study Extent	Aleutian Islands, Alaska

Method step description:

ROV expeditions are conducted according to procedures as outlined by Galvez et al., 2025: https://repository.library.noaa.gov/view/noaa/70281 Expedition report: https://repository.library.noaa.gov/view/noaa/70924

Additional Metadata

Acknowledgements
Purpose