_id	Original Header	Common Name	Units	Data Provider Description	media_type	result_value_type	Notes
1	The exact column name as it appeared in the raw file before any cleaning.	A common or understandable name for the variable.	The physical units associated with the variable (e.g., m, PSU, °C).	The description supplied by the original data provider explaining what the variable represents.	The medium from which the measurement was taken (e.g., water, air, sediment). Extracted from the header or assigned manually.	Whether the value is a direct measurement or a calculated value.	Any notes about how the variable was processed or derived.Extracted from the header or assigned manually.
2	id	Measurement ID	–	Unique ID value assigned to each row in the datasheet	Seawater		
3	date_time	Date and Time	–	Date and Time in the format dd-mm-yyyy hh:mm:ss	Seawater		
4	year	Year	–	Year of measurement	Seawater		
5	month	Month	–	Month of measurement	Seawater		
6	day	Day	–	Date of measurement	Seawater		
7	hour	Hour	–	Hour of measurement	Seawater		
8	minute	Minute	–	Minute of measurement	Seawater	actual	
9	latitude	Latitude	degrees north	Latitude of measurement	Seawater	actual	
10	longitude	Longitude	degrees east	Longitude of measurement	Seawater	actual	
11	temperature	Water Temperature	degrees C	Surface water temperature determined from TSG	Seawater	actual	
12	temp_adj	Water Temperature (Adjusted)	degrees C	Surface water temperature adjusted to reflect CTD conditions	Seawater	actual	
13	salinity	Salinity	psu	Surface water salinity determined from TSG	Seawater	actual	
14	sal_ref	Reference Salinity	g/kg	Salinity measured in g/kg for ocean calculations	Seawater	actual	
15	co2	Surface water pCO2	µatm	Surface water pCO2 measurement	Seawater	actual	
16	pco2temp	pCO2 (temperature)	µatm	Thermally influenced surface water pCO2	Seawater	actual	
17	pco2net	pCO2 (net)	µatm	“Net” influenced surface water pCO2	Seawater	actual	
18	dpco2	Air - Sea CO2 difference	µatm	Difference between seawater and atmospheric CO2	Seawater	calculated