Dataset: LDEO surface gridded carbon parameters

Name: Carbonate chemistry data gridded to 4 degree latitude by 5 degree longitude by monthly boxes in the global model from 2011-2013 (Climatological Mean Distribution of pH project)
Published: 2013-06-10
Keywords: oceans

Cite This Dataset

Spatial Extent: N:80 E:177.5 S:-76 W:-177.5

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)

Program:

Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA) (SEES-OA)

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)

Version Date:

2013-06-10

Validated:

Yes

Current State:

Final no updates expected

Carbonate chemistry data gridded to 4 degree latitude by 5 degree longitude by monthly boxes in the global model from 2011-2013 (Climatological Mean Distribution of pH project)

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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

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

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.

Data Files

File
pH_grid.csv (Comma Separated Values (.csv), 2.35 MB) MD5:94ef71f7de17d1db45f68f968bf56869 Primary data file for dataset ID 3961

More Information about this dataset

Funding Sources

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

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Takahashi_LDEO		2011-01-01	LDEO	Taro Takahashi (Principal Investigator)	data info

Instruments

None available yet

Parameters

Date and time formats are described in python strftime() syntax.

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

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Dataset: LDEO surface gridded carbon parameters