Samar Khatiwala

Publications

S. Khatiwala, F. Primeau, and T. Hall. Reconstruction of the history of anthropogenic CO₂ concentrations in the ocean. Nature, 462 (doi: 10.1038/nature08526), 2009. (link; supplementary material: link; see also related 'Making the Paper' story in the same issue: link.) See also the Columbia press release, and media coverage in The New York Times, TIME magazine, National Geographic magazine, NPR, VOA, and German public radio.

S. Khatiwala. Response of the Southern Ocean meridional overturning circulation to increasing winds in coarse-resolution ocean models: sensitivity to eddy-parameterizations. Submitted, 2009.

I. Kriest, S. Khatiwala, and A. Oschlies. Assessment of simple global marine biogeochemical models of increasing complexity. Submitted, 2009. (PDF)

F. Terenzi and S. Khatiwala. Modeling the atmospheric airborne fraction in a simple carbon cycle model. Submitted, 2009. (PDF)

C. A. Carlson, D. A. Hansell, N. B. Nelson, D. A. Siegel, W. M. Smethie, and S. Khatiwala. Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin. Submitted, 2009.

M. Holzer, F. Primeau, W. Smethie, and S. Khatiwala. Where and how long ago was water in the western North Atlantic ventilated? Maximum-entropy inversions of bottle data from WOCE line A20. Submitted, 2009. (PDF)

K. Jones, S. Khatiwala, T. van de Flierdt, S. Hemming, and S. Goldstein. Modeling the distribution of Nd isotopes in the oceans using an ocean general circulation model. Earth and Planet. Sci. Lett., 272:610–619, 2008. (PDF)

S. Khatiwala. Fast spin up of ocean biogeochemical models using matrix-free Newton-Krylov. Ocean Modell., 23:121–129, 2008. (PDF)

T. Merlis and S. Khatiwala. Fast dynamical spin-up of ocean general circulation models using Newton-Krylov methods. Ocean Modell., 21:97–105, 2008. (PDF)

M. Siddall, S. Khatiwala, T. van de Flierdt, K. Jones, S. Goldstein, S. Hemming, and R. F. Anderson. Towards explaining the Nd paradox using reversible scavenging in an ocean general circulation model. Earth and Planet. Sci. Lett., 274:448–461, 2008. (PDF)

S. Khatiwala. A computational framework for simulation of biogeochemical tracers in the ocean. Glob. Biogeochem. Cy., 21 (doi: 10.1029/2007GB002923), 2007. (PDF)

N. B. Nelson, D. A Siegel, C. A. Carlson, C. Swan, W. M. Smethie, and S. Khatiwala. Hydrography of chromophoric dissolved organic matter in the North Atlantic. Deep Sea Res. I, 54:710–731, 2007. (PDF)

F. Terenzi, T. M. Hall, S. Khatiwala, C. B. Rodehacke, and D. A. LeBel. Uptake of natural and anthropogenic carbon by the Labrador Sea. Geophys. Res. Lett., 34 (doi: 10.1029/2006GL028543), 2007. (PDF)

S. Khatiwala, M. Visbeck, and M. Cane. Accelerated simulation of passive tracers in ocean circulation models. Ocean Modell., 9:51–69, 2005. (PDF)

T. M. Hall, D. W. Waugh, T. W. N. Haine, P. E. Robbins, and S. Khatiwala. Estimates of anthropogenic carbon in the Indian Ocean with allowance for mixing and time-varying air-sea CO₂ disequilibrium. Glob. Biogeochem. Cy., 18 (doi: 10.1029/2003GB002120), 2004. (PDF)

S. Khatiwala. Generation of internal tides in an ocean of finite depth: analytical and numerical calculations. Deep-Sea Res. I, 50:3–21, 2003. (PDF)

S. Khatiwala, P. Schlosser, and M. Visbeck. Rates and mechanisms of water mass transformation in the Labrador Sea as inferred from tracer observations. J. Phys. Oceanogr., 32:666–686, 2002. (PDF)

P. Schlosser, B. Ekwurzel, S. Khatiwala, R. Newton, W. Maslowski, and S. Pfirman. Correction to ``Decrease of river runoff in the upper waters of the Eurasian Basin, Arctic Ocean, between 1991 and 1996: Evidence from δ¹⁸O data''. Geophys. Res. Lett., 29 (doi:10.1029/2002GL015698), 2002. (PDF)

P. Schlosser, R. Newton, B. Ekwurzel, S. Khatiwala, R. Mortlock, and R. Fairbanks. Decrease of river runoff in the upper waters of the Eurasian Basin, Arctic Ocean, between 1991 and 1996: Evidence from δ¹⁸O data. Geophys. Res. Lett., 29 (doi: 10.1029/2001GL013135), 2002. (PDF)

N. Schörghofer, O. Aharonson, and S. Khatiwala. Slope streaks on Mars: Correlations with surface properties and the potential role of water. Geophys. Res. Lett., 29 (doi: 10.1029/2002GL015889), 2002. (PDF)

S. Khatiwala, B. E. Shaw, and M. A. Cane. Enhanced sensitivity of persistent events to weak forcing in dynamical and stochastic systems: Implications for climate change. Geophys. Res. Lett., 28:2633–2636, 2001. (PDF)

S. Khatiwala, M. Visbeck, and P. Schlosser. Age tracers in an ocean GCM. Deep-Sea Res. I, 48:1423–1441, 2001. (PDF)

S. Khatiwala and M. Visbeck. An estimate of the eddy-induced circulation in the Labrador Sea. Geophys. Res. Lett., 27:2277–2280, 2000. (PDF)

P. Schlosser, B. Ekwurzel, S. Khatiwala, R. Newton, W. Maslowski, and S. Pfirman. Tracer studies of the Arctic freshwater budget. In E. L. Lewis, editor, Freshwater balance of the Arctic Ocean, NATO Science Series, pages 453–478. Kluwer Academic Publishers, 2000.

S. Khatiwala, R. G. Fairbanks, and R. Houghton. Freshwater sources to the coastal ocean off northeastern North America: Evidence from H₂¹⁸O/H₂¹⁶O. J. Geophys. Res., 104:18241–18255, 1999. (PDF)

P. Schlosser, R. Bayer, G. Bonisch, L. Cooper, B. Ekwurzel, W. J. Jenkins, S. Khatiwala, S. Pfirman, and W. M. Smethie. Pathways and mean residence times of dissolved pollutants in the ocean derived from transient tracers and stable isotopes. Science of the Total Environment, 238:15–30, 1999.

R. Weppernig, P. Schlosser, S. Khatiwala, and R. G. Fairbanks. Isotope data from Ice Station Weddell: Implications for deep water formation in the Weddell Sea. J. Geophys. Res., 101:25723–25739, 1996. (PDF)

Research

Transit-Time Distributions (coming soon; in the mean time see here: Matlab TTD scripts )

Iterative methods for fast dynamical spinup of ocean general circulation models (coming soon)

Eddies in the Southern Ocean and anthropogenic carbon uptake (coming soon)

Curriculum Vitae

Publications

Research

Teaching

Programming

Useful Links