Chemical and Biological Oceanographic Conditions on the Scotian Shelf and in the Eastern Gulf of Maine during 2023

Casault, B., Johnson, C.L., Devred, E., and Beazley, L. 2025. Chemical and Biological Oceanographic Conditions on the Scotian Shelf and in the Eastern Gulf of Maine during 2023. Can. Tech. Rep. Fish. Aquat. Sci. 3658: vi + 57 p. https://doi.org/10.60825/4d69-8120

Nutrient and plankton metrics are assessed in the context of physical conditions observed in the Maritimes region in 2023. Sub-surface (50-150 m) nitrate inventories were spatially variable across the region in 2023 but indicated a gradual return toward near-normal levels, except in the Bay of Fundy (i.e., at Prince-5) where a record-low value was observed in 2023. Bottom nitrate concentrations during summer were predominantly below normal across the region in 2023. In situ chlorophyll-a inventories were on average higher than normal in the region in 2023. Surface chlorophyll-a concentrations measured by satellite remote sensing reached record-high values in some sub-regions in 2023. The spring phytoplankton bloom timing was later than normal with a mainly lower-than-normal intensity in 2023. The fall bloom was generally earlier than normal with a higher-than-normal intensity. Diatoms abundance at Halifax-2 indicates increasing levels over the last three years. The abundance of Calanus finmarchicus was on average slightly above normal in the region in 2023, contrasting with the low abundances observed since 2011. Pseudocalanus spp. abundance was on average above normal in the region while zooplankton biomass and the abundance of Arctic Calanus species remained mainly near or below normal levels in 2023.

Datasets available for download

Additional Info

Field Value
Last Updated October 20, 2025, 02:39 (UTC)
Created October 20, 2025, 02:39 (UTC)
Domain / Topic
Domain or topic of the dataset being cataloged.
Environment, Oceans
Title
Title for the Dataset.
Chemical and Biological Oceanographic Conditions on the Scotian Shelf and in the Eastern Gulf of Maine during 2023
Description
A description of the dataset.

Casault, B., Johnson, C.L., Devred, E., and Beazley, L. 2025. Chemical and Biological Oceanographic Conditions on the Scotian Shelf and in the Eastern Gulf of Maine during 2023. Can. Tech. Rep. Fish. Aquat. Sci. 3658: vi + 57 p. https://doi.org/10.60825/4d69-8120

Nutrient and plankton metrics are assessed in the context of physical conditions observed in the Maritimes region in 2023. Sub-surface (50-150 m) nitrate inventories were spatially variable across the region in 2023 but indicated a gradual return toward near-normal levels, except in the Bay of Fundy (i.e., at Prince-5) where a record-low value was observed in 2023. Bottom nitrate concentrations during summer were predominantly below normal across the region in 2023. In situ chlorophyll-a inventories were on average higher than normal in the region in 2023. Surface chlorophyll-a concentrations measured by satellite remote sensing reached record-high values in some sub-regions in 2023. The spring phytoplankton bloom timing was later than normal with a mainly lower-than-normal intensity in 2023. The fall bloom was generally earlier than normal with a higher-than-normal intensity. Diatoms abundance at Halifax-2 indicates increasing levels over the last three years. The abundance of Calanus finmarchicus was on average slightly above normal in the region in 2023, contrasting with the low abundances observed since 2011. Pseudocalanus spp. abundance was on average above normal in the region while zooplankton biomass and the abundance of Arctic Calanus species remained mainly near or below normal levels in 2023.
Tags / Keywords
Keywords/tags categorizing the dataset.
Format (CSV, XLS, TXT, PDF, etc)
File format of the dataset.
Dataset Size
Dataset size in megabytes.
Metadata Identifier
Metadata identifier – can be used as the unique identifier for catalogue entry
Published Date
Published date of the dataset.
2025-02-05
Time Period Data Span (start date)
Start date of the data in the dataset.
Time Period Data Span (end date)
End date of time data in the dataset.
GeoSpatial Area Data Span
A spatial region or named place the dataset covers.
Field Value
Access category
Type of access granted for the dataset (open, closed, service, etc).
License
License used to access the dataset.
Open Government Licence - Canada
Limits on use
Limits on use of data.
Location
Location of the dataset.
https://open.canada.ca/data/en/dataset/2bd03ad9-e955-4087-a1ff-f108f09e39d7
Data Service
Data service for accessing a dataset.
Owner
Owner of the dataset.
Fisheries and Oceans Canada | Pêches et Océans Canada
Contact Point
Who to contact regarding access?
Government of Canada; Fisheries and Oceans Canada, [email protected]
Contact Point Email
The email to contact regarding access?
Publisher
Publisher of the dataset.
Publisher Email
Email of the publisher.
Author
Author of the dataset.
Author Email
Email of the author.
Accessed At
Date the data and metadata was accessed.
Field Value
Identifier
Unique identifier for the dataset.
Language
Language(s) of the dataset
Link to dataset description
A URL to an external document describing the dataset.
Persistent Identifier
Data is identified by a persistent identifier.
Globally Unique Identifier
Data is identified by a persistent and globally unique identifier.
Contains data about individuals
Does the data hold data about individuals?
Contains data about identifiable individuals
Does the data hold identifiable data about individual?
Contains Indigenous Data
Does the data hold data about Indigenous communities?
Portal Type
Platform type of the source portal.
Field Value
Version
Version of the datatset
None
Source
Source of the dataset.
None
Version notes
Version notes about the dataset.
Is version of another dataset
Link to dataset that it is a version of.
Other versions
Link to datasets that are versions of it.
Provenance Text
Provenance Text of the data.
Provenance URL
Provenance URL of the data.
Temporal resolution
Describes how granular the date/time data in the dataset is.
GeoSpatial resolution in meters
Describes how granular (in meters) geospatial data is in the dataset.
GeoSpatial resolution (in regions)
Describes how granular (in regions) geospatial data is in the dataset.
Field Value
Indigenous Community Permission
Who holds the Indigenous Community Permission. Who to contact regarding access to a dataset that has data about Indigenous communities.
Community Permission
Community permission (who gave permission).
The Indigenous communities the dataset is about
Indigenous communities from which data is derived.
Field Value
Number of data rows
If tabular dataset, total number of rows.
Number of data columns
If tabular dataset, total number of unique columns.
Number of data cells
If tabular dataset, total number of cells with data.
Number of data relations
If RDF dataset, total number of triples.
Number of entities
If RDF dataset, total number of entities.
Number of data properties
If RDF dataset, total number of unique properties used by the triples.
Data quality
Describes the quality of the data in the dataset.
Metric for data quality
A metric used to measure the quality of the data, such as missing values or invalid formats.

0 Comments

Please login or register to comment.