OSNAP Datasets

Generated: |today|

This report covers all available OSNAP datasets.

OSNAP_MOC_MHT_MFT_TimeSeries_201408_202207_2025.nc

Dataset Overview

  • Project: Overturning in the Subpolar North Atlantic Program (OSNAP)

  • Description: OSNAP transport and hydrographic estimates dataset, 2014-2020

  • DOI: https://doi.org/10.35090/gatech/70342

  • Source File: OSNAP_MOC_MHT_MFT_TimeSeries_201408_202207_2025.nc

  • Data Product: Time series of MOC, MHT, and MFT (2014-2022)

  • Date Created: 2025-05-21T15:09:24Z

  • Time Coverage: 2014-08-01 to 2022-07-01

  • Record Length: 96 observations (7.9 years)

  • Sampling Frequency: monthly

Distribution Statement:

Any person making use of OSNAP observational data and/or numerical results must communicate with the responsible investigators at the start of the analysis and anticipate that the data collectors will be co-authors of published results. In cases where investigators choose not to be co-authors on publications that rely on their data, the parties responsible for collecting the data and the sponsoring funding agencies should be acknowledged, including reference to any relevant publications by the originating authors describing the data sets and a reference to the data set itself using its DOI. OSNAP data are intended for scholarly use by the academic and scientific community, with the express understanding that any such use will properly acknowledge the originating investigator.

Citation:

Fu, Y., Lozier, M. S., Bower, A., Burmeister, K., Carrilho Biló, T., Cyr, F., et al. (2025). Characterizing the interannual variability of North Atlantic subpolar overturning. Geophysical Research Letters, 52, e2025GL114672. https://doi.org/10.1029/2025GL114672

Acknowledgement:

OSNAP data were collected and made freely available by the OSNAP (Overturning in the Subpolar North Atlantic Program) project and all the national programs that contribute to it (www.o-snap.org).

Dataset Visualization

AMOC time series plot

Time series plot for OSNAP_MOC_MHT_MFT_TIMESERIES_201408_202207_2025 dataset.

Dataset Statistics

  • Total Variables: 18

  • Total Coordinates: 1

  • Dataset Size: 0.01 MB

Coordinate Information

The following table shows information about the dataset coordinates in the standardised version, including coordinate name remapping from the original, if any:

Coordinate

Description

Units

Size

Min Value

Max Value

Missing %

TIME

Time: Time in days since 1950-01-01

datetime64[ns]

(96,)

2014-08-01

2022-07-01

0.0%

Variable Information

The following table shows the mapping from original variable names to standardized names, along with key statistics for each variable.

Variable

Description

Units

Size

Min Value

Max Value

Missing %

MFT_ALL → MFT

Meridional freshwater transport across the full OSNAP array

Sverdrup

(96,)

-0.48

-0.23

0.0%

MFT_EAST

Freshwater trans. east: Meridional freshwater transport across OSNAP East

Sverdrup

(96,)

-0.28

-0.09

0.0%

MFT_EAST_ERR

Freshwater trans. east error: Uncertainty in MFT_EAST

Sverdrup

(96,)

0.03

0.07

0.0%

MFT_ALL_ERR → MFT_ERR

uncertainty for MFT_ALL

Sverdrup

(96,)

0.04

0.08

0.0%

MFT_WEST

Freshwater trans. west: Meridional freshwater transport across OSNAP West

Sverdrup

(96,)

-0.24

-0.08

0.0%

MFT_WEST_ERR

Freshwater trans. west error: Uncertainty in MFT_WEST

Sverdrup

(96,)

0.01

0.04

0.0%

MHT_ALL → MHT

Meridional heat transport across the full OSNAP array

PW

(96,)

0.35

0.64

0.0%

MHT_EAST

MHT east: Meridional heat transport across OSNAP East

PW

(96,)

0.28

0.57

0.0%

MHT_EAST_ERR

MHT east uncertainty: Uncertainty in MHT_EAST

PW

(96,)

0.07

0.15

0.0%

MHT_ALL_ERR → MHT_ERR

uncertainty for MHT_ALL

PW

(96,)

0.07

0.15

0.0%

MHT_WEST

MHT west: Meridional heat transport across OSNAP West

PW

(96,)

0.03

0.13

0.0%

MHT_WEST_ERR

MHT west uncertainty: Uncertainty in MHT_WEST

PW

(96,)

0.01

0.02

0.0%

MOC_EAST → MOC_EAST_SIGMA0

Eastern MOC_sigma0: Maximum overturning streamfunction across OSNAP East

Sverdrup

(96,)

10.36

23.66

0.0%

MOC_EAST_ERR → MOC_EAST_SIGMA0_ERR

uncertainty for MOC_EAST

Sverdrup

(96,)

2.33

5.68

0.0%

MOC_ALL → MOC_SIGMA0

MOC_sigma0: Maximum overturning streamfunction across full OSNAP array

Sverdrup

(96,)

7.98

25.59

0.0%

MOC_ALL_ERR → MOC_SIGMA0_ERR

MOC_sigma0 uncertainty: Uncertainty in MOC_ALL

Sverdrup

(96,)

2.87

5.99

0.0%

MOC_WEST → MOC_WEST_SIGMA0

Western MOC_sigma0: Maximum overturning streamfunction across OSNAP West

Sverdrup

(96,)

0.36

7.78

0.0%

MOC_WEST_ERR → MOC_WEST_SIGMA0_ERR

Western MOC_sigma0 uncertainty: Uncertainty in MOC_WEST

Sverdrup

(96,)

0.90

3.05

0.0%

Metadata (edits applied noted)

The following metadata provides comprehensive information about this dataset:

OSNAP_Streamfunction_201408_202207_2025.nc

Dataset Overview

  • Project: Overturning in the Subpolar North Atlantic Program (OSNAP)

  • Description: OSNAP transport and hydrographic estimates dataset, 2014-2020

  • DOI: https://doi.org/10.35090/gatech/70342

  • Source File: OSNAP_Streamfunction_201408_202207_2025.nc

  • Data Product: Meridional overturning streamfunction (2014-2022)

  • Date Created: 2025-05-21T15:16:52Z

  • Time Coverage: 2014-08-01 to 2022-07-01

  • Record Length: 96 observations (7.9 years)

  • Sampling Frequency: monthly

Distribution Statement:

Any person making use of OSNAP observational data and/or numerical results must communicate with the responsible investigators at the start of the analysis and anticipate that the data collectors will be co-authors of published results. In cases where investigators choose not to be co-authors on publications that rely on their data, the parties responsible for collecting the data and the sponsoring funding agencies should be acknowledged, including reference to any relevant publications by the originating authors describing the data sets and a reference to the data set itself using its DOI. OSNAP data are intended for scholarly use by the academic and scientific community, with the express understanding that any such use will properly acknowledge the originating investigator.

Citation:

Fu, Y., Lozier, M. S., Bower, A., Burmeister, K., Carrilho Biló, T., Cyr, F., et al. (2025). Characterizing the interannual variability of North Atlantic subpolar overturning. Geophysical Research Letters, 52, e2025GL114672. https://doi.org/10.1029/2025GL114672

Acknowledgement:

OSNAP data were collected and made freely available by the OSNAP (Overturning in the Subpolar North Atlantic Program) project and all the national programs that contribute to it (www.o-snap.org).

Dataset Visualization

AMOC time series plot

Time series plot for OSNAP_STREAMFUNCTION_201408_202207_2025 dataset.

Dataset Statistics

  • Total Variables: 3

  • Total Coordinates: 2

  • Dataset Size: 1.06 MB

Coordinate Information

The following table shows information about the dataset coordinates in the standardised version, including coordinate name remapping from the original, if any:

Coordinate

Description

Units

Size

Min Value

Max Value

Missing %

LEVEL → SIGMA0

Sigma0: Potential density anomaly to 1000 kg/m3, surface reference

kg m-3

(481,)

23.30

28.10

0.0%

TIME

Time: Start date of each monthly period

datetime64[ns]

(96,)

2014-08-01

2022-07-01

0.0%

Variable Information

The following table shows the mapping from original variable names to standardized names, along with key statistics for each variable.

Variable

Description

Units

Size

Min Value

Max Value

Missing %

T_ALL → STREAMFUNCTION_SIGMA0

Streamfunction: Streamfunction in σθ coordinates across full OSNAP

Sverdrup

(481, 96)

-5.16

25.34

0.0%

T_EAST → STREAMFUNCTION_SIGMA0_EAST

Streamfunction east: Streamfunction in σθ at OSNAP East

Sverdrup

(481, 96)

-1.77

23.82

0.0%

T_WEST → STREAMFUNCTION_SIGMA0_WEST

Streamfunction west: Streamfunction in σθ at OSNAP West

Sverdrup

(481, 96)

-5.72

7.67

0.0%

Metadata (edits applied noted)

The following metadata provides comprehensive information about this dataset:

OSNAP_Gridded_TSV_201408_202207_2025.nc

Dataset Overview

  • Project: Overturning in the Subpolar North Atlantic Program (OSNAP)

  • Description: OSNAP transport and hydrographic estimates dataset, 2014-2020

  • DOI: https://doi.org/10.35090/gatech/70342

  • Source File: OSNAP_Gridded_TSV_201408_202207_2025.nc

  • Data Product: Gridded velocity, temperature, and salinity (2014-2022)

  • Date Created: 2025-05-21T15:11:05Z

  • Time Coverage: 2014-08-01 to 2022-07-01

  • Record Length: 96 observations (7.9 years)

  • Sampling Frequency: monthly

Distribution Statement:

Any person making use of OSNAP observational data and/or numerical results must communicate with the responsible investigators at the start of the analysis and anticipate that the data collectors will be co-authors of published results. In cases where investigators choose not to be co-authors on publications that rely on their data, the parties responsible for collecting the data and the sponsoring funding agencies should be acknowledged, including reference to any relevant publications by the originating authors describing the data sets and a reference to the data set itself using its DOI. OSNAP data are intended for scholarly use by the academic and scientific community, with the express understanding that any such use will properly acknowledge the originating investigator.

Citation:

Fu, Y., Lozier, M. S., Bower, A., Burmeister, K., Carrilho Biló, T., Cyr, F., et al. (2025). Characterizing the interannual variability of North Atlantic subpolar overturning. Geophysical Research Letters, 52, e2025GL114672. https://doi.org/10.1029/2025GL114672

Acknowledgement:

OSNAP data were collected and made freely available by the OSNAP (Overturning in the Subpolar North Atlantic Program) project and all the national programs that contribute to it (www.o-snap.org).

Dataset Statistics

  • Total Variables: 3

  • Total Coordinates: 4

  • Dataset Size: 55.97 MB

Coordinate Information

The following table shows information about the dataset coordinates in the standardised version, including coordinate name remapping from the original, if any:

Coordinate

Description

Units

Size

Min Value

Max Value

Missing %

DEPTH

Depth: Depth below surface of the water

m

(199,)

15.00

3975.00

0.0%

LATITUDE

Latitude: Latitude north (WGS84)

degree_north

(256,)

52.02

60.23

0.0%

LONGITUDE

Longitude: Longitude east (WGS84)

degree_east

(256,)

-56.88

-6.12

0.0%

TIME

Time: Start date of each monthly period

datetime64[ns]

(96,)

2014-08-01

2022-07-01

0.0%

Variable Information

The following table shows the mapping from original variable names to standardized names, along with key statistics for each variable.

Variable

Description

Units

Size

Min Value

Max Value

Missing %

SAL → PSAL

Salinity: Practical salinity along OSNAP

1

(96, 199, 256)

31.13

35.59

13.0%

TEMP

Temperature: In-situ temperature along OSNAP

degree_C

(96, 199, 256)

-4.23

14.73

13.0%

VELO → VCUR

Velocity: Cross-sectional velocity along OSNAP

m s-1

(96, 199, 256)

-0.82

0.77

13.0%

Metadata (edits applied noted)

The following metadata provides comprehensive information about this dataset: