Current Work

 I am a Doherty Associate Research Scientist at the Lamont Doherty Earth Observatory, Columbia University, currently doing a rotation as an Associate Program Director in the Biological Oceanography Program at the U.S. National Science Foundation.  I am interested in studying the impact of tropical rivers on the marine ecosystem.  My research projects also include working on developing and validating Ocean Color algorithms for the U.S. East coast, focusing on Massachusetts Bay and the South Atlantic Bight.  As a part of a NASA funded study I am investigating the spatial and temporal variability of dissolved organic carbon on the U.S. East coast.   I have worked on developing algorithms for the remote sensing of Trichodesmium using SeaWiFS data. For more details of this project please go to the "definitive" Trichodesmium home page . For my personal home page, click here .

Greg, Ajit, and Piotr milking the CTD

Contact Information

Abbreviated Curriculum Vitae

Education

Ph.D. in Coastal Oceanography. 1995. SUNY at Stony Brook. 
"Optical Properties of the Marine Cyanobacteria Trichodesmium: Applications to Remote Sensing" 

M.S. in Marine Environmental Science. 1989. SUNY at Stony Brook. 
"Linking Maps to Spreadsheet-based Coastal Zone Information Systems" 

B.Sc. (Special) in Physics. 1984. The American College, Madurai, India. 

Publications

Foster, R.A., A. Subramaniam, Z.P. Zehr. (2009). Distribution and activity of diazotrophy in the Eastern Equatorial Atlantic (Gulf of Guinea). doi:10.1111/j.1462-2920.2008.01796.x Environmental Microbiology. 11(4), 741-750. Foster2008EnvMicro

Del Vecchio, R., A. Subramaniam, S. Schollaert Uz, J. Ballabrera Poi, CW. Brown, and NV. Blough. (2009) Decadal time-series of SeaWiFS retrieved CDOM absorption and estimates of CO2 photoproduction on the continental shelf of the Eastern United States. Geophysical Research Letters 36 L02602, doi:10.1029/2008GL036169.

Zeng, N., J-H. Yoon, J.A. Marengo, A. Subramaniam, C.A. Nobre, A. Mariotti, J.D. Neelin (2008).  Causes and impacts

of the 2005 Amazon drought.  Environmental Research Letters 3 doi:10.1088/1748-9326/3/1/014002.

Cooley, S.R., V.J. Coles, A. Subramaniam, P.L. Yager (2007).  Seasonal variations in the Amazon plume-related atmospheric carbon sink. Global Biogeochemical Cycles. 21 (GB3014), doi:10.1029/2006GB002831.

P.V. Sundareshwar and 28 others in alphabetical order including A. Subramaniam. (2007) Environmental Monitoring Network for India.  Science. 316:204-205.

Foster, R.A., A. Subramaniam, C, Mahaffey, E.J. Carpenter, D.G. Capone, J.P. Zehr. (2007) Influence of the Amazon River plume on distributions of free-living and symbiotic cyanobacteria in the western tropical north Atlantic Ocean.  Limnology and Oceanography, 52:517-532.

Tzortziou, M., A. Subramaniam, J.R. Herman, C.L. Gallegos, P.J. Neale, L.W. Harding (2007) Remote Sensing Reflectance and Inherent Optical Properties in the Mid Chesapeake Bay. Estuarine, Coastal and Shelf Science. doi:10.1016/j.ecss.2006.09.018.

Shipe, R. F., J. Curtaz, A. Subramaniam, E.J Carpenter, D.G. Capone (2006). Diatom biomass and productivity in oceanic and plume influenced waters of the western tropical Atlantic ocean. Deep Sea Research Part I. Vol. 53 1320-1334.

Lutz, V.A., A. Subramaniam, R.M. Negri, R.I. Silva, J.I. Carreto (2006) Annual variations in bio-optical properties at the 'Estación Permanente Estudios Ambientales (EPEA)' coastal station, Argentina.  Continental Shelf Research. Vol 26 1093-1112.

Tzortziou, M. J.R. Herman, C.L. Gallegos, P.J. Neale, A. Subramaniam, L.W. Harding, Z. Ahmad. (2006). Bio-optics of the Chesapeake Bay from Measurements and Radiative transfer closure.  Estuarine and Coastal Shelf Science Vol. 68 348-362.

Westberry, T.K, D.A Siegel, A. Subramaniam (2005) An improved bio-optical model for the remote sensing of

Trichodesmium spp. blooms.  Journal of Geophysical Research Vol. 110 C06012 doi:10.1029/2004JC002517.

Capone, D.G., J.A. Burns, J.P. Montoya, A. Subramaniam, C. Mahaffey, T. Gunderson, A.F. Michaels.  (2005) Nitrogen fixation by Trichodesmium spp.: An important source of new nitrogen to the tropical and subtropical North Atlantic

Ocean. Global Biogeochemical Cycles, Vol. 19, GB2024, doi:10.1029/2004GB002331

Capone, D.G. and A. Subramaniam (2005) ”Seeing Microbes from Space” American Society of Microbiology News

Del Vecchio, R. and A. Subramaniam (2004) Influence of the Amazon River on the surface optical properties of the Western Tropical North Atlantic Ocean. Journal of Geophysical Research. 109, C11001, doi:10.1029/2004JC002503.

J.L. Hand, N.M. Mahowald, Y. Chen, R.L. Siefert, C. Luo, A. Subramaniam, and I. Fung (2004)  Estimates of atmospheric-processed soluble iron from observations and a global mineral aerosol model: Biogeochemical implications.  Journal of Geophysical Research. DOI 10.1029/2004JD004574.

Knobelspiesse, K. D., C. Pietras, G. S. Fargion, M. Wang, R. Frouin, M. A. Miller, A. Subramaniam and W. M. Balch (2004). "Maritime aerosol optical thickness measured by handheld sun photometers." Remote Sensing of Environment. 93 Pp 87-106.

Carpenter, E.J., A. Subramaniam, D.G. Capone. (2004). Biomass and primary productivity of the cyanobacterium, Trichodesmium spp., in the tropical N Atlantic Ocean. Deep Sea Research I 51: 173-203.

Subramaniam, A., R. R. Hood, C. W. Brown, E. J. Carpenter and D. G. Capone (2002). “Detecting Trichodesmium Blooms in SeaWiFS Imagery.”  Deep-Sea Research Part II Vol. 49/1-3 Pp 107-121.

Hood, R. R., A. Subramaniam, L. R. May, E. J. Carpenter and D. G. Capone (2002). “Remote Estimation of Nitrogen Fixation by Trichodesmium.”  Deep-Sea Research Part II Vol. 49/1-3 Pp 123-147

Dupouy C., Neveux J., Subramaniam A., Mulholland M.R., Montoya J.P., Campbell L., Capone D.G., and Edward J. Carpenter. (2000). Satellite captures Trichodesmium blooms in the South Western Tropical Pacific Ocean.  EOS:

Transactions: American Geophysical Union Vol. 81:2. January 11. 2000.

Carpenter, E.J, J.P. Montoya, J. Burns, M.R. Mulholland, A. Subramaniam, and D.G. Capone (1999).  Extensive bloom

of a N2 fixing symbiotic association in the tropical Atlantic Ocean.  Marine Ecology Progress Series. Vol.185:273-283.

Subramaniam, A, E.J. Carpenter, D. Karentz and P.G. Falkowski. (1999) Optical properties of the marine diazotrophic cyanobacteria Trichodesmium; I - Absorption and spectral photosynthetic characteristics. Limnology and Oceanography.  Vol.44:3 Pp. 618-627. Subramaniam1999aL&O

Subramaniam, A, E.J. Carpenter and P.G. Falkowski. (1999) Optical properties of the marine diazotrophic cyanobacteria Trichodesmium; II - A reflectance model for remote-sensing.  Limnology and Oceanography.  Vol.44:3 Pp 628-638.  Subramaniam1999bL&O

Capone, D.G., A. Subramaniam, J.P. Montoya, M. Voss, C. Humborg, F. Pollehne, and E.J. Carpenter. (1998). An extensive bloom of the diazotrophic cyanobacterium, Trichodesmium erythraem, in the central Arabian Sea during the spring intermonsoon. Marine Ecology Progress Series. Vol.172:281-292.

Subramaniam, A and E.J. Carpenter. (1994) An Initial Protocol to Identify Trichodesmium Blooms in CZCS Imagery.  International Journal of Remote Sensing, Vol.15:8 Pp. 1559-1569.

Vieira, M.E.C., A. Subramaniam and H.J. Bokuniewicz. (1992) "Plume Dispersion of Dilute Suspensions: A model of barge overflow adapted for use in a personal computer". Wat. Sci. Tech. Vol.25:9, Pp. 173-179.

Maheswaran, S., B.K Rangaraj, R.P Riesz, V.Sriram and A. Subramaniam. (1984) "Plastic optics for laboratory use".  The Journal of Optics 1984, Vol.13:2  Pp58-59.