N: 21.26 S: 5.06 E: -118.32 W: -157.88
Description
The SPURS (Salinity Processes in the Upper Ocean Regional Study) project is a NASA-funded oceanographic process study and associated field program that aim to elucidate key mechanisms responsible for near-surface salinity variations in the oceans. The project is comprised of two field campaigns and a series of cruises in regions of the Atlantic and Pacific Oceans exhibiting salinity extremes. SPURS employs a suite of state-of-the-art in-situ sampling technologies that, combined with remotely sensed salinity fields from the Aquarius/SAC-D,SMAP and SMOS satellites, provide a detailed characterization of salinity structure over a continuum of spatio-temporal scales. The SPURS-2 campaign involved two month-long cruises by the R/V Revelle in August 2016 and October 2017 combined with complementary sampling on a more continuous basis over this period by the schooner Lady Amber. Focused around a central mooring located near 10N,125W, the objective of SPURS-2 was to study the dynamics of the rainfall-dominated surface ocean at the western edge of the eastern Pacific fresh pool subject to high seasonal variability and strong zonal flows associated with the North Equatorial Current and Countercurrent. Shipborne ADCP observations were made during both SPURS-2 R/V Revelle cruises. Acoustic Doppler Current Profilers (ADCP) provide water column current velocity profile observations. The resulting data files available here are for narrowband 75 and 150khz ADCP measurements made during the first cruise, plus narrowband (NB) 75khz and both 75khz and 150khz broadband (BB) ADCP measurements obtained during the second R/V Revelle cruise.
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Variables
The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|
| amp | Received signal strength of ADCP measurement | N/A | double | N/A | 21 to 223 | 1 |
| latitude | Latitude of ADCP measurement | degrees_north | double | N/A | 5.0551138888889 to 31.777591666667 | 1 |
| longitude | Longitude of ADCP measurement | degrees_east | double | N/A | -125.57253055556 to -118.32044722222 | 1 |
| pflag | Zero indicates good data. For more information see: https://currents.soest.hawaii.edu/docs/adcp_doc/pflags_doc/ | N/A | double | -1 | 0 to 7 | 1 |
| pg | Percent of good pings of ADCP measurement | N/A | double | N/A | 0 to 100 | 1 |
| ship_dir | Ship directions are expressed in degrees normal | degrees | double | N/A | -179.99291992188 to 179.99998474121 | 1 |
| ship_spd | Ship zonal velocity component during ADCP measurement | m s-1 | double | N/A | 0.00026863985060815 to 6.7123 | 1 |
| temperature | Temperature of ADCP transducer | degrees_C | double | N/A | 19.367647171021 to 28.85000038147 | 1 |
| time | Time of ADCP measurement | days since 1950-01-01T00:00:00 | double | N/A | N/A | 1 |
| trajectory | Unique identifier for each feature instance | N/A | double | N/A | N/A | 1 |
| u | Zonal velocity component of ADCP measurement | m s-1 | double | N/A | -0.90422236919403 to 1.0032422542572 | 1 |
| v | Meridional velocity component of ADCP measurement | m s-1 | double | N/A | -1.1738119125366 to 0.92588442564011 | 1 |
| z | Depth of ADCP measurement | m | double | N/A | 16.930000305176 to 489 | 1 |