N: 13.8 S: 6.1 E: -108.8 W: -126.4
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. A Waveglider is an autonomous platform propelled by the conversion of ocean wave energy into forward thrust and employing solar panels to power instrumentation. For SPURS-2, sensors included a CTD at the near-surface and another at 6 m depth, providing continuous salinity and temperature observations plus air temperature and wind measurements. Three wavegliders (ASL22, 32, 42) were deployed from the Revelle in August 2016 and again in November 2017 before final retrieval at the conclusion on the second cruise. Waveglider trajectories followed a 20x20km square loop around the moorings and a butterfly pattern around the neutrally-buoyant float. NetCDF waveglider data files here (one per platform) contain hour averaged, georeferenced trajectory data for those parameters and depths.
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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 |
|---|---|---|---|---|---|---|
| lower_latitude | Lower Latitude of Waveglider measurement | degrees_north | double | N/A | 9.5276483333333 to 10.279588333333 | 1 |
| lower_longitude | Lower Longitude of Waveglider measurement | degrees_east | double | N/A | -125.07665333333 to -124.66757166667 | 1 |
| lower_pressure | Lower Pressure of Waveglider | dbar | double | N/A | 4.37 to 7.549999 | 1 |
| lower_salinity | Lower Salinity of Waveglider | 1 | double | N/A | 31.745068 to 33.207558 | 1 |
| lower_temperature | Lower Temperature of Waveglider | degrees_C | double | N/A | 27.597198 to 28.9357 | 1 |
| lower_time | Lower Time of Waveglider measurement | days since 1950-01-01T00:00:00 | double | N/A | N/A | 1 |
| meteorological_latitude | Meteorological Latitude from an Airmar WX200 instrument on a 1-meter-tall mast | degrees_north | double | N/A | 9.5276516666667 to 13.79546 | 1 |
| meteorological_longitude | Meteorological Longitude from an Airmar WX200 instrument on a 1-meter-tall mast | degrees_east | double | N/A | -126.44454166667 to -120.71525833333 | 1 |
| meteorological_pressure | Meteorological Pressure from an Airmar WX200 instrument on a 1-meter-tall mast | mbar | double | N/A | 1000.9 to 1016.1 | 1 |
| meteorological_temperature | Meteorological Temperature from an Airmar WX200 instrument on a 1-meter-tall mast | degrees_C | double | N/A | 20.6 to 31.7 | 1 |
| meteorological_time | Meteorological Time from an Airmar WX200 instrument on a 1-meter-tall mast | days since 1950-01-01T00:00:00 | double | N/A | N/A | 1 |
| meteorological_wind_direction | Meteorological Wind Direction from an Airmar WX200 instrument on a 1-meter-tall mast | degree | double | N/A | 0 to 359.9 | 1 |
| meteorological_wind_speed | Meteorological Wind Speed from an Airmar WX200 instrument on a 1-meter-tall mast | knots | double | N/A | 0.9 to 23 | 1 |
| upper_latitude | Upper Latitude of Waveglider measurement | degrees_north | double | N/A | 9.5276433333333 to 13.772675 | 1 |
| upper_longitude | Upper Longitude of Waveglider measurement | degrees_east | double | N/A | -126.43803333333 to -120.71517833333 | 1 |
| upper_pressure | Upper Pressure of Waveglider | dbar | double | N/A | 0.010000229 to 0.40999985 | 1 |
| upper_salinity | Upper Salinity of Waveglider | 1 | double | N/A | 29.342173226063 to 33.61505 | 1 |
| upper_temperature | Upper Temperature of Waveglider | degrees_C | double | N/A | 26.0295 to 30.9323 | 1 |
| upper_time | Upper Time of Waveglider measurement | days since 1950-01-01T00:00:00 | double | N/A | N/A | 1 |