month 
Calendar month, e.g. 1 = Jan, 2=Feb


month 
lat 
Latitude; North is positive

decimal degrees 
lat 
lon_360 
Longitude of the center point of the box in degrees East (i.e. 75 degrees W = 75 + 360 = 285)

decimal degrees 
lon_360 
lon 
Longitude; East is positive

decimal degrees 
lon 
slope 
Slope of linear relation between Salinity and Potential Alkalinity

unitless 
unknown 
intercept 
Intercept of linear relation between Salinity and Potential Alkalinity

unitless 
unknown 
temp_ss 
Climatological Sea Surface Temperature

degrees Celsius 
SST 
sal 
Climatological Sea Surface Salinity (Practical Salinity Scale)

unitless 
sal 
PALK 
Potential Alkalinity. PALK = Total Alkalinity + Nitrate estimated from salinity: PALK = SLOPE * Salinity + INTERCEPT

microequivalents per kilogram seawater 
unknown 
NO3 
Climatological Nitrate

micromoles per kilogram seawater 
NO3 
PO4 
Climatological Phosphate

micromoles per kilogram seawater 
PO4 
SIO3 
Climatological Silicate

micromoles per kilogram seawater 
unknown 
TALK 
Total Alkalinity calculated from Potential Alkalinity: TALK = PALK  NO3

microequivalents per kilogram seawater 
TALK 
PCO2_SST 
Partial Pressure of CO2 at sea surface temperature; adjusted to year 2005

microatmospheres 
pCO2 
TCO2 
Total CO2 calculated from TALK and pCO2

micromoles per kilogram seawater 
TCO2 
CO3 
Carbonite ion concentration

micromoles per kilogram seawater 
unknown 
pH 
Total hydrogen ion concentration scale

unitless 
pH 
HION 
Total hydrogen ion concentration

10^9 moles per kilogram seawater 
unknown 
OMGARAG 
Degree of saturation (Omega) of Aragonite

unitless 
OM_ar 
OMGCALC 
Degree of saturation (Omega) of Calcite

unitless 
OM_ca 