Current Magnitude and Direction
Data Set (DS) | Office for Coastal Management (OCM)GUID: gov.noaa.nmfs.inport:66127 | Updated: August 20, 2024 | Published / External
Summary
Short Citation
Office for Coastal Management, 2024: Current Magnitude and Direction, https://www.fisheries.noaa.gov/inport/item/66127.
Full Citation Examples
Monthly and annual U and V vectors were summarized for 14 unique depth levels from daily means using the HYCOM and NCODA Global 1/12-degree Reanalysis. The U vector (m/s) is to the East and the V vector (m/s) is to the North. Current magnitude (m/s) was calculated using the daily U and V vectors. Descriptive statistics of mean, variance, standard deviations, minimum, and maximum were calculated for each month from the twenty years of data using the daily means (1992-2012). Mean, variance, and standard deviation was calculated for the annual summary period (1992-2012). The mean direction in degrees (with 0 = North) was calculated from the summarized U and V vector means, and represents the direction that the current is moving toward. The 1/12-degree global HYCOM+NCODA Ocean Reanalysis was funded by the U.S. Navy and the Modeling and Simulation Coordination Office. Computer time was made available by the DoD High Performance Computing Modernization Program. The output is publicly available at http://hycom.org.
Distribution Information
-
Marine Cadastre Data Registry
For coastal and ocean planning
Controlled Theme Keywords
oceans, planningCadastre
Child Items
No Child Items for this record.
Contact Information
Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Extents
-179.919999° W,
179.920001° E,
74.64° N,
14° S
Item Identification
| Title: | Current Magnitude and Direction |
|---|---|
| Status: | Completed |
| Abstract: |
Monthly and annual U and V vectors were summarized for 14 unique depth levels from daily means using the HYCOM and NCODA Global 1/12-degree Reanalysis. The U vector (m/s) is to the East and the V vector (m/s) is to the North. Current magnitude (m/s) was calculated using the daily U and V vectors. Descriptive statistics of mean, variance, standard deviations, minimum, and maximum were calculated for each month from the twenty years of data using the daily means (1992-2012). Mean, variance, and standard deviation was calculated for the annual summary period (1992-2012). The mean direction in degrees (with 0 = North) was calculated from the summarized U and V vector means, and represents the direction that the current is moving toward. The 1/12-degree global HYCOM+NCODA Ocean Reanalysis was funded by the U.S. Navy and the Modeling and Simulation Coordination Office. Computer time was made available by the DoD High Performance Computing Modernization Program. The output is publicly available at http://hycom.org. |
| Purpose: |
To support ocean planning activities pursuant to the Executive Order Regarding the Ocean Policy to Advance the Economic, Security, and Environmental Interests of the United States, the Energy Policy Act, the National Environmental Policy Act, the Rivers and Harbors Act, and the Coastal Zone Management Act. |
| Supplemental Information: |
Bureau Code: 006:48, Program Code: 006:055 |
Keywords
Theme Keywords
| Thesaurus | Keyword |
|---|---|
| ISO 19115 Topic Category |
oceans
|
| ISO 19115 Topic Category |
planningCadastre
|
| UNCONTROLLED | |
| None | coastal |
| None | planning |
| None | renewable energy |
Spatial Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
|
| UNCONTROLLED | |
| None | Exclusive Economic Zone |
| None | Outer Continental Shelf |
| None | Territorial Sea |
| None | United States of America |
Physical Location
| City: | Charleston |
|---|---|
| State/Province: | SC |
Data Set Information
| Data Set Scope Code: | Data Set |
|---|---|
| Maintenance Frequency: | As Needed |
| Data Presentation Form: | Map (digital) |
| Entity Attribute Overview: |
annualMean, annualStdDev, annualVariance, directionAnnualMean |
| Distribution Liability: |
https://www.marinecadastre.gov/about/disclaimer.html |
| Data Set Credit: | U. S. Global Ocean Data Assimilation Experiment, National Ocean Partnership Program, NOAA National Centers for Coastal Ocean Science, NOAA Office for Coastal Management |
Support Roles
Point of Contact
| Date Effective From: | 2018-06 |
|---|---|
| Date Effective To: | |
| Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
| Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
| Email Address: | coastal.info@noaa.gov |
| Phone: | (843) 740-1202 |
| URL: | https://coast.noaa.gov |
Extents
| Currentness Reference: | Publication Date |
|---|
Extent Group 1
Extent Group 1 / Geographic Area 1
| W° Bound: | -179.919999 | |
|---|---|---|
| E° Bound: | 179.920001 | |
| N° Bound: | 74.64 | |
| S° Bound: | 14 |
Access Information
| Security Class: | Unclassified |
|---|---|
| Data Use Constraints: |
For coastal and ocean planning |
Distribution Information
Distribution 1
| Download URL: | https://marinecadastre.gov/data/ |
|---|---|
| Distributor: | |
| Description: |
Marine Cadastre Data Registry |
Distribution 2
| Download URL: | https://marinecadastre.gov/downloads/data/mc/CurrentMagnitudeDirection.zip |
|---|---|
| Distributor: |
Technical Environment
| Description: |
Microsoft Windows, ArcGIS Pro, Azure SQL |
|---|
Data Quality
| Accuracy: |
Untested |
|---|---|
| Horizontal Positional Accuracy: |
Compiled to meet 10 meters horizontal accuracy at 95% confidence level |
| Completeness Report: |
Untested |
| Conceptual Consistency: |
These data are logically consistent |
Lineage
Sources
HYCOM and NCODA Global 1/12° Reanalysis
| Contact Name: | U. S. Global Ocean Data Assimilation Experiment (GODAE), National Ocean Partnership Program (NOPP) |
|---|---|
| Extent Type: | Discrete |
| Extent Start Date/Time: | 2018-08-01 |
| Citation URL: | https://www.arcgis.com/home/item.html?id=5075d771f6894080ac190c3ccd954f0e |
| Citation URL Name: | Source Online Linkage |
| Citation URL Description: |
URL where the source data were originally accessed. |
| Source Contribution: |
HYCOM Current Speed and Direction |
Process Steps
Process Step 1
| Description: |
(1) A daily snapshot (1200 hours data file) of the HYCOM + NCODA Global 1/12° Reanalysis data was downloaded from the HYCOM website in NetCDF format. The data range spanned from 10/2/1992 to 12/31/2012. Global temperature, salinity, u and v grids were extracted from the daily HYCOM NetCDF files for each of the available z-levels (depth). A current magnitude grid was created for each u/v grid. Mean, minimum, maximum, variance and standard deviation grids were calculated for each variable-depth-month combination by combining all of the daily files for each variable-depth-month (e.g. temperature-40m-January). Mean, minimum, maximum, and standard deviation were also calculated by combining daily files across the entire time span (annual). (2) Data were extracted from netCDF files and stored in CSV files for each variable, statistic, and depth level (38 depth levels) (3) 14 unique depth levels were created as values were identical (2-125, 150-250, 300-350, 400-500, 600, 700, 800, 900-1000, 1250, 1500, 2000, 3000, 4000, 5000) and stored in a single CSV. (4) CSVs for each statistic (mean, min, max, var, stdev) were combined into a single csv file for each month. (Therefore each variable has 12 monthly CSV and 1 annual CSV.) Note: for annual no min or max statistics were generated. (5) All CSV files were exported as feature datasets. (6) Direction in degrees was calculated from U and V mean vectors (not calculated for max, min, std, var). Direction is the direction the current is moving to. (7) All CSV files were clipped by the U.S. Exclusive Economic Zone (EEZ). (8) Any record with Null for all Depth levels was removed. |
|---|---|
| Process Date/Time: | 2018-08-01 00:00:00 |
Process Step 2
| Description: |
1) Corrected a spelling error in the field annualVariance 2) Replaced the data download package to fix a format error in the data and to change the storage format to GeoPackage |
|---|---|
| Process Date/Time: | 2024-08-15 00:00:00 |
Catalog Details
| Catalog Item ID: | 66127 |
|---|---|
| GUID: | gov.noaa.nmfs.inport:66127 |
| Metadata Record Created By: | Brianna Key |
| Metadata Record Created: | 2021-12-22 03:15+0000 |
| Metadata Record Last Modified By: | Daniel Martin |
| Metadata Record Last Modified: | 2024-08-20 12:47+0000 |
| Metadata Record Published: | 2021-12-22 |
| Owner Org: | OCM |
| Metadata Publication Status: | Published Externally |
| Do Not Publish?: | N |
| Metadata Last Review Date: | 2021-12-22 |
| Metadata Review Frequency: | 1 Year |
| Metadata Next Review Date: | 2022-12-22 |