Data: reading, downloading, and descriptions

Reading and Downloading Relevant Data: 

All variables saved in: OCS_toolbox/OCS_VARS.mat

Takahashi2009 Products: pCO2sw, pCO2air, SST, salinity, wind speed, ice_percent, air-sea CO2 flux
	Raw data: taka_dataoffweb.txt (http://cdiac.ornl.gov/oceans/LDEO_Underway_Database/month_flux_2006c.txt) LDEO database (NDP-088); see Data Availability section; Takahashi et al., 2009)
	Data is read in and preprocessed before analysis:
		 •	flux field multiplied by -1 for correct sign conventions (mol,CO2/m2/yr)
		 •	pCO2 multiplied by ice fraction to account for high latitude ice contribution (uatm)
		 •	all fields shifted to change to dateline (SST: degC, salinity:psu, wind speed: m/s, ice_percent: %

WOA2013: Nitrate climatology
	Raw data: World Ocean Atlas 2013 version 2 (see Data Availability section; Boyer et al., 2013). 
        woa13*.nc (https://www.nodc.noaa.gov/cgi-bin/OC5/woa13/woa13oxnu.pl)
        Data is read in and constrained to the surface layer in the z dimension, re-gridded to the Takahashi2009 grid and land mask.
        Units are in mili-mole/m3
	

Numerical Simulations: 
The ensemble mean of 5 historical climate CMIP5 forcing NASA-GISS modelE2.1 runs of the coupled climate model with interactive ocean biogeochemistry (NOBM; Gregg and Casey, 2007)is re-gridded to the Takahashi2009 grid and land mask. The regridded ensemble mean can be found here: link




References

Boyer, T.P., J. I. Antonov, O. K. Baranova, C. Coleman, H. E. Garcia, A. Grodsky, D. R. Johnson, R. A. Locarnini, A. V. Mishonov, T.D. O'Brien, C.R. Paver, J.R. Reagan, D. Seidov, I. V. Smolyar, and M. M. Zweng, 2013: World Ocean Database 2013, NOAA Atlas NESDIS 72, S. Levitus, Ed., A. Mishonov, Technical Ed.; Silver Spring, MD, 209 pp., http://doi.org/10.7289/V5NZ85MT

Gregg, W. W., and Casey, N. W. (2007). Modeling coccolithophores in the global oceans. Deep Sea Res. II 54, 447–477. doi: 10.1016/j.dsr2.2006.12.007

Romanou, A., W.W. Gregg, J. Romanski, M. Kelley, R. Bleck, R. Healy, L. Nazarenko, G. Russell, G.A. Schmidt, S. Sun, and N. Tausnev, 2013: Natural air-sea flux of CO2 in simulations of the NASA-GISS climate model: Sensitivity to the physical ocean model formulation. Ocean Model., 66, 26-44, doi:10.1016/j.ocemod.2013.01.008.



Romanou, A., J. Romanski, and W. W. Gregg. 2014. "Natural ocean carbon cycle sensitivity to parameterizations of the recycling in a climate model." Biogeosciences, 11 (4): 1137-1154 [10.5194/bg-11-1137-2014]

Taro Takahashi, Stewart C. Sutherland, Rik Wanninkhof, Colm Sweeney, Richard A. Feely, David W. Chipman, Burke Hales, Gernot Friederich, Francisco Chavez, Christopher Sabine, Andrew Watson, Dorothee C.E. Bakker, Ute Schuster, Nicolas Metzl, Hisayuki Yoshikawa-Inoue, Masao Ishii, Takashi Midorikawa, Yukihiro Nojiri, Arne Körtzinger, Tobias Steinhoff, Mario Hoppema, Jon Olafsson, Thorarinn S. Arnarson, Bronte Tilbrook, Truls Johannessen, Are Olsen, Richard Bellerby, C.S. Wong, Bruno Delille, N.R. Bates, Hein J.W. de Baar, Climatological mean and decadal change in surface ocean pCO, and net sea–air CO flux over the global oceans, Deep Sea Research Part II: Topical Studies in Oceanography, Volume 56, Issue 8, 2009, Pages 554-577, ISSN 0967-0645, http://dx.doi.org/10.1016/j.dsr2.2008.12.009.
(http://www.sciencedirect.com/science/article/pii/S0967064508004311)


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Created by: Rebecca Latto  rl2797@columbia.edu and Anastasia Romanou anastasia.romanou@nasa.gov
Last edited: 9/6/17