Seawater conductivity refers to the ability of seawater to conduct electricity. The presence of ions in the seawater, such as salt, increases the electrical conducting ability of seawater. As such, conductivity can be used as a proxy for determining the quantity of salt in a sample of seawater.
coordinates :
lat depth lon time
data_product_identifier :
CONDWAT_L1
long_name :
Seawater Conductivity
precision :
6
standard_name :
sea_water_electrical_conductivity
units :
S m-1
Array
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79.54 kB
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float32
numpy.ndarray
conductivity_qartod_results
(time)
uint8
dask.array<chunksize=(9209,), meta=np.ndarray>
comment :
Summary QARTOD test flags. For each datum, the flag is set to the most significant result of all QARTOD tests run for that datum.
Seawater Density is defined as mass per unit volume and is calculated from the conductivity, temperature and depth of a seawater sample using the TEOS-10 equation.
coordinates :
lat depth lon time
data_product_identifier :
DENSITY_L2
long_name :
Seawater Density
precision :
3
standard_name :
sea_water_density
units :
kg m-3
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159.08 kB
73.67 kB
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float64
numpy.ndarray
density_qc_executed
(time)
uint8
dask.array<chunksize=(9209,), meta=np.ndarray>
coordinates :
lat depth lon time
long_name :
QC Checks Executed
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19.89 kB
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uint8
numpy.ndarray
density_qc_results
(time)
uint8
dask.array<chunksize=(9209,), meta=np.ndarray>
coordinates :
lat depth lon time
long_name :
QC Checks Results
Array
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Bytes
19.89 kB
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(19885,)
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uint8
numpy.ndarray
deployment
(time)
int32
dask.array<chunksize=(9209,), meta=np.ndarray>
coordinates :
lat depth lon time
long_name :
Deployment Number
name :
deployment
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79.54 kB
36.84 kB
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numpy.ndarray
driver_timestamp
(time)
float64
dask.array<chunksize=(9209,), meta=np.ndarray>
comment :
Driver timestamp, UTC
coordinates :
lat depth lon time
long_name :
Driver Timestamp, UTC
units :
seconds since 1900-01-01
Array
Chunk
Bytes
159.08 kB
73.67 kB
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numpy.ndarray
ingestion_timestamp
(time)
float64
dask.array<chunksize=(9209,), meta=np.ndarray>
comment :
The NTP Timestamp for when the granule was ingested
coordinates :
lat depth lon time
long_name :
Ingestion Timestamp, UTC
units :
seconds since 1900-01-01
Array
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Bytes
159.08 kB
73.67 kB
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numpy.ndarray
internal_timestamp
(time)
float64
dask.array<chunksize=(9209,), meta=np.ndarray>
comment :
Internal timestamp, UTC
coordinates :
lat depth lon time
long_name :
Internal Timestamp, UTC
units :
seconds since 1900-01-01
Array
Chunk
Bytes
159.08 kB
73.67 kB
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numpy.ndarray
port_timestamp
(time)
float64
dask.array<chunksize=(9209,), meta=np.ndarray>
comment :
Port timestamp, UTC
coordinates :
lat depth lon time
long_name :
Port Timestamp, UTC
units :
seconds since 1900-01-01
Array
Chunk
Bytes
159.08 kB
73.67 kB
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(19885,)
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numpy.ndarray
pressure
(time)
float32
dask.array<chunksize=(9209,), meta=np.ndarray>
ancillary_variables :
pressure_qartod_results pressure_qartod_executed
comment :
Seawater Pressure refers to the pressure exerted on a sensor in situ by the weight of the column of seawater above it. It is calculated by subtracting one standard atmosphere from the absolute pressure at the sensor to remove the weight of the atmosphere on top of the water column. The pressure at a sensor in situ provides a metric of the depth of that sensor.
coordinates :
lat depth lon time
data_product_identifier :
PRESWAT_L1
long_name :
Seawater Pressure
precision :
3
standard_name :
sea_water_pressure
units :
dbar
Array
Chunk
Bytes
79.54 kB
36.84 kB
Shape
(19885,)
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4 Tasks
3 Chunks
Type
float32
numpy.ndarray
pressure_qartod_results
(time)
uint8
dask.array<chunksize=(9209,), meta=np.ndarray>
comment :
Summary QARTOD test flags. For each datum, the flag is set to the most significant result of all QARTOD tests run for that datum.
Salinity is generally defined as the concentration of dissolved salt in a parcel of seawater. Practical Salinity is a more specific unitless quantity calculated from the conductivity of seawater and adjusted for temperature and pressure. It is approximately equivalent to Absolute Salinity (the mass fraction of dissolved salt in seawater) but they are not interchangeable.
coordinates :
lat depth lon time
data_product_identifier :
PRACSAL_L2
long_name :
Practical Salinity
precision :
3
standard_name :
sea_water_practical_salinity
units :
1
Array
Chunk
Bytes
79.54 kB
36.84 kB
Shape
(19885,)
(9209,)
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4 Tasks
3 Chunks
Type
float32
numpy.ndarray
salinity_qartod_results
(time)
uint8
dask.array<chunksize=(9209,), meta=np.ndarray>
comment :
Summary QARTOD test flags. For each datum, the flag is set to the most significant result of all QARTOD tests run for that datum.