Dataset: LDEO surface gridded carbon parameters
Deployment: Takahashi_LDEO

Carbonate chemistry data gridded to 4 degree latitude by 5 degree longitude by monthly boxes.

Principal Investigator:

Taro Takahashi (Lamont-Doherty Earth Observatory, LDEO)

Contact:

Stewart C. Sutherland (Lamont-Doherty Earth Observatory, LDEO)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Climatological Mean Distribution of pH in Surface Waters in the Unified pH Scale and Mean Rate of changes in Selected Areas (Climatological Mean Distribution of pH)

Current State:

Final no updates expected

Version Date:

2013-06-10

Data URL:

https://www.bco-dmo.org/dataset-deployment/455998/data

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Description

Carbonate chemistry data gridded to 4 degree latitude by 5 degree longitude by monthly grid in the reference year 2005.

For detailed information, see final report.

Associated dataset: LDEO global surface ocean carbon.

Maps of global estimated pH

Methods & Sampling

Dataset acquisition description

Gridded data for salinity, sea surface temperature, nitrate, phosphate, and silicate were regridded to our 4 degree latitude by 5 degree longitude grid. pCO2 were interpolated to the same grid in the manner described in the Final Report by Taro Takahashi to NSF for Grant OCE-10-38891 'Climatological Mean Distribution in the Global Ocean Surface Waters in the Unified pH Scale and Mean Rate of Their Changes in Selected Areas' (Dec. 31, 2012) pp. 34. The method will be described in detail in a paper in preparation.

Data Processing Description

Dataset Processing Description

Working on a 4 degree latitude by 5 degree longitude by monthly grid, Potential Alkalinity (PALK) was calculated using a series of linear equations relating PALK to salinity. Total alkalinity was obtained by removing the nitrate component of PALK using climatological data. TCO2 was calculated from Total Alkalinity, and pCO2 using an updated global pCO2 map. The other carbonate chemistry values such as pH, CO3=, calcite and aragonite saturation were calculated at the same time as TCO2.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1038891	NSF Division of Ocean Sciences

Instruments

None available yet

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
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	no_bcodmo_term
intercept	Intercept of linear relation between Salinity and Potential Alkalinity	unitless	no_bcodmo_term
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	no_bcodmo_term
NO3	Climatological Nitrate	micromoles per kilogram seawater	NO3
PO4	Climatological Phosphate	micromoles per kilogram seawater	PO4
SIO3	Climatological Silicate	micromoles per kilogram seawater	no_bcodmo_term
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	no_bcodmo_term
pH	Total hydrogen ion concentration scale	unitless	pH
HION	Total hydrogen ion concentration	10^-9 moles per kilogram seawater	no_bcodmo_term
OMGARAG	Degree of saturation (Omega) of Aragonite	unitless	OM_ar
OMGCALC	Degree of saturation (Omega) of Calcite	unitless	OM_ca

Database

Contribute Data

Dataset: LDEO surface gridded carbon parameters
Deployment: Takahashi_LDEO

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: LDEO surface gridded carbon parametersDeployment: Takahashi_LDEO

Dataset acquisition description

Dataset Processing Description

Dataset: LDEO surface gridded carbon parameters
Deployment: Takahashi_LDEO