WET Labs Research: Michael Twardowski CV

Curriculum Vita

Michael S. Twardowski Michael Twardowski

WET Labs, Inc.
Department of Research
165 Dean Knauss Dr., Narragansett, RI 02882
ph: (401) 783-1787
cell: (401) 580-6144
fax: (401) 783-0309
E-mail: mtwardo@wetlabs2.com

EDUCATION
B.S. Biology with Honors, Trinity University, San Antonio, Texas 1992
Ph.D. Biological Oceanography, University of Rhode Island 1998

EXPERIENCE
Research Associate (Post-doc), WET Labs Environmental Optics Fellowship,
COAS, Oregon State University 1998–1999

Research Associate, COAS, Oregon State University 1999–2000

ASEE Fellow, Stennis Space Center and Washington D.C. NRLs 2000

Visiting Scientist, Grad. School of Oceanography, Univ. of Rhode Island 2000–2003

Adjunct Professor, Grad. School of Oceanography, Univ. of Rhode Island 2003–present

Senior Scientist, WET Labs, Inc. 2000–2002

Project Director, WET Labs, Inc. 2002–present

Manages research and R&D in environmental optics.
Designs optical sensors, develops protocols for their use, and uses these instruments to conduct peer-reviewed cutting-edge oceanographic research.
Uses theoretical models to derive aspects of particle composition from the inversion of scattering measurements.
Has developed inversion algorithms to derive biogeochemical properties from optical measurements.
Has used scattering, absorption, and fluorescence measurements to investigate biogeochemical processes in the dissolved and particulate fractions of seawater.
Experience working with bio-optical algorithms relating the inherent and apparent optical properties for remote sensing applications.

PUBLICATIONS

Please note that the links to .pdf files are provided for your personal use and are not intended for distribution.

Twardowski, M.S., M. Lewis, A. Barnard, and J.R.V. Zaneveld. 2005. In-water instrumentation and platforms for ocean color remote sensing applications. In: Remote Sensing of Coastal Aquatic Waters, R. Miller and C.E. Del-Castillo [Eds.], Springer-Kluwer Pub., 69–100.

Twardowski, M.S., E. Boss, J.M. Sullivan, and P.L. Donaghay, 2004. Modeling spectral absorption by chromophoric dissolved organic matter (CDOM), Mar. Chem., 89:69–88, doi:10.1016/j.marchem.2004.02.008.

Twardowski , M.S., E. Boss, J.M. Sullivan, and P.L. Donaghay. 2003. Reanalysis of the use of an exponential model to describe the spectral shape of absorption by chromophoric dissolved organic matter (CDOM). submitted.

Dekshenieks, M.M., A.L. Alldredge, A. Barnard, E. Boss, J. Case, T.J. Cowles, P.L. Donaghay, L.B. Eisner, D.J. Gifford, C.F. Greenlaw, C. Herren, D.V. Holliday, D. Johnson, S. MacIntyre, D. McGehee, T.R. Osborn, M.J. Perry, R. Pieper, J.E.B. Rines, D.C. Smith, J.M. Sullivan, M.K. Talbot, M.S. Twardowski, A. Weidemann, and J.R. Zaneveld. 2003. Characteristics, Distribution and Persistence of Thin Layers Over a 48 Hour Period. Mar. Ecol. Prog. Ser., 261:1–19.

Miller, R., M.S. Twardowski, C. Moore, and C. Casagrande. 2003. The Dolphin: Technology to Support Remote Sensing Bio-optical Algorithm Development and Applications. Backscatter 14(2):8–12.

Boss, E., W.S. Pegau, M. Lee, M.S. Twardowski, E. Shybanov, G. Korotaev, and F. Baratange. 2004. The particulate backscattering ratio at LEO 15 and its use to study particles composition and distribution. J. Geophys. Res., 109, C01014, doi:10.1029/2002JC001514.

Twardowski, M.S., E. Boss, J.M. Sullivan, and P.L. Donaghay. 2004. Modeling spectral absorption by chromophoric dissolved organic matter (CDOM). Mar. Chem., 89: 69-88, doi:10.1016/j.marchem.2004.02.008.

Twardowski, M.S., M. Lewis, A. Barnard, and J.R.V. Zaneveld. 2004. In-water instrumentation and platforms for ocean color remote sensing applications. In: Remote Sensing of Coastal Aquatic Waters, R. Miller and C. Del-Castillo [Eds.], Kluwer Publishing, [in press].

Zaneveld, J.R.V., M.S. Twardowski, M. Lewis, and A. Barnard. 2004. Radiative transfer and remote sensing. In: Remote Sensing of Coastal Aquatic Waters, R. Miller and C. Del-Castillo [Eds.], Kluwer Publishing, [in press].

Sullivan, J.M., Twardowski, M.S., Donaghay, P.L., and Freeman, S.A. 2004. Using Scattering Characteristics to Discriminate Particle Types in US Coastal Waters, Appl. Opt. [in press].

Twardowski, M.S., J.M. Sullivan, P.L. Donaghay, and J.R.V. Zaneveld. 1999. Microscale quantification of the absorption by dissolved and particulate material in coastal waters with an ac-9. J. Atmos. Ocean. Technol. 16(12):691–707.

Boss, E., W.S. Pegau, W.D. Gardner, J.R.V. Zaneveld, A.H. Barnard, M.S. Twardowski, G.C. Chang, and T.D. Dickey. 2001. Spectral particulate attenuation in the bottom boundary layer of a continental shelf. J. Geophys. Res., 106(C5):9509–9516.

Boss, E., M.S. Twardowski, and S. Herring. 2001. Shape of the particulate beam attenuation spectrum and its inversion to obtain the shape of the particulate size distribution. Appl. Opt., 40:4885–4893.

Dekshenieks, M.M., P.L. Donaghay, J.M. Sullivan, J.E.B. Rines, T.R. Osborn, and M.S. Twardowski. 2001. Temporal and spatial occurrence of thin phytoplankton layers in relation to physical processes. Mar. Ecol. Prog. Ser., 223:61–71.

Twardowski, M.S., and P.L. Donaghay. 2001. Separating in situ and terrigenous sources of absorption by dissolved material in coastal waters. J. Geophys. Res., 106(C2):2545–2560.

Twardowski, M.S., E. Boss, J.B. Macdonald, W.S. Pegau, A.H. Barnard, and J.R.V. Zaneveld. 2001. A model for estimating bulk refractive index from the optical backscattering ratio and the implications for understanding particle composition in Case I and Case II waters. J. Geophys. Res., 106(C7):14,129–14,142.

Rines, J.E.B., P.L. Donaghay, M. Dekshenieks, J.M. Sullivan, and M.S. Twardowski. 2002. Thin layers and camouflage: hidden Pseudo-nitzschia spp. (Bacillariophyceae) populations in a fjord in the San Juan Islands, Washington, U.S.A. Mar. Ecol. Prog. Ser., 225:123–137.

Twardowski, M.S., and P.L. Donaghay. 2002. Photobleaching of aquatic dissolved materials: absorption removal, spectral alteration, and their interrelationship. J. Geophys. Res, 107(C8):6.1–6.12.

Eisner, L., M.S. Twardowski, T.J. Cowles, and M.J. Perry. 2003. Resolving phytoplankton photoprotective:photosynthetic carotenoid ratios on fine scales using in situ spectral absorption measurements. Limnol. Oceanogr., 48:632–646.

Boss, E. W. S. Pegau, M. Lee, M. Twardowski, M. Shibanov, E. Korotev and F. Baratange. 2003. The particulate backscattering ratio at LEO 15 and its use to study particles composition and distribution. J. Geophys. Res., in press.

Twardowski, M.S., E. Boss, J.M. Sullivan, and P.L. Donaghay. 2003. Reanalysis of the use of an exponential model to describe the spectral shape of absorption by chromophoric dissolved organic matter (CDOM). submitted.

PUBLICATIONS: dissertation
Twardowski, M.S. 1998. The finescale distribution, origin, and photobleaching of the spectral absorption of dissolved organic matter in coastal waters. University of Rhode Island, Kingston.

PUBLICATIONS: SOCIAL AUDIENCE
Twardowski, M.S. 2000. Ocean research in the ocean state. The Rhode Island Trooper,12(1):107–109.

Twardowski, M.S. and A. Barnard. 2001. Observing the ocean: sensing technology and observation platforms. Maritimes, 43(4).

PUBLICATIONS: EXTENDED ABSTRACTS
Gould, R.W., R.H. Stavn, M.S. Twardowski, and G.M. Lamella. 2002. Partitioning optical properties into organic and inorganic components from ocean color imagery. Proceedings from Ocean Optics XVI, November 18–22, Santa Fe.

Sullivan, J.M., M.S. Twardowski, P.L. Donaghay, and S. Freeman. 2002. Particulate bulk refractive index distributions in coastal regions as determined from backscattering ratio measurements. Proceedings from Ocean Optics XVI, November 18–22, Santa Fe.

Twardowski, M.S., J.R.V. Zaneveld, and C. Moore. 2002. A novel technique for determining beam attenuation compatible with a small sensor form factor and compact deployment platforms. Proceedings from Ocean Optics XVI, November 18–22, Santa Fe.

Zaneveld, J.R.V., M.S. Twardowski, K.S. Shifrin, W.S. Pegau, E. Boss, and I. Zolotov. 2002. Inversion of light scattering measurements to obtain biogeochemical parameters (plenary talk). Proceedings from Ocean Optics XVI, November 18–22, Santa Fe.

Boss, E., and M.S. Twardowski. 2000. On the relationship of the particulate beam attenuation spectrum and size distribution of oceanic particles. Proceedings from Ocean Optics XV, October 16–20, Monaco.

Coleman, J.E., R.A. Reynolds, M.C. Talbot, M.S. Twardowski, M.J. Perry. 2000. Utilization of solar-induced chlorophyll a fluorescence as an indicator of phytoplankton biomass in coastal waters. Proceedings from Ocean Optics XV, October 16–20, Monaco.

Eisner, L., M.S. Twardowski, and T.J. Cowles. 2000. In situ spectral absorption (ac-9) measurements as an index of photoprotective/photosynthetic carotenoid ratios. Proceedings from Ocean Optics XV, October 16–20, Monaco.

Moore, C., M.S. Twardowski, and J.R.V. Zaneveld. 2000. The ECO VSF - A multi-angle scattering sensor for determination of the volume scattering function in the backward direction. Proceedings from Ocean Optics XV, October 16–20, Monaco.

Twardowski, M.S., E. Boss, J.B. Macdonald, W.S. Pegau, A.H. Barnard, and J.R.V. Zaneveld. 2000. A model for retrieving oceanic particle composition and size distribution from measurements of the backscattering ratio and spectral attenuation. Proceedings from Ocean Optics XV, October 16–20, Monaco.

Twardowski, M.S., and P.L. Donaghay. 1998. The spectral signature associated with the photobleaching of CDOM absorption. Proceedings from Ocean Optics XIV, November 10–13, Kona, HI.

Twardowski, M.S., R.C. Moyer, and M.A. Uddin. 1992. Formaldehyde abatement from air with a microbial community. Proceedings from the Texas Academy of Science, March 6–7.

CONFERENCE ABSTRACTS
Twardowski, M.S., and E. Boss. 2002. Inversion of Inherent Optical Properties to infer biogeochemical properties of particles. Invited speaker, European Geophysical Society Meeting, Nice, France, April 22–26.

Twardowski, M.S., and E. Boss. 2002. The optical effects of CDOM sorption to particles. Ocean Sciences Meeting, Honolulu, HI, February 12–16.

Boss, E., W.S. Pegau, M. Lee, M.S. Twardowski, E. Shibanov, G. Korotaev, F. Baratange. 2001. Measurements of the phase function and their implication for inferring the bulk particulate index of refraction at LEO-15. ASLO Aquatic Sciences Meeting, Albuquerque, NM, February 12–16.

Boss, E., W.S. Pegau, M.S. Twardowski, W.D. Gardner, J.R.V. Zaneveld, A.H. Barnard, G.C. Chang, and T.D. Dickey. 2000. Spectral particulate attenuation in the bottom boundary layer of a continental shelf. EOS 80:118.

Macdonald, J.B., M.S. Twardowski, W.S. Pegau, A.H. Barnard, E. Boss, and J.R.V. Zaneveld. 2000. Characterization of spectral backscattering in the Gulf of California. AGU meeting, San Antonio, TX, January, 24-28.

Moore, C., W.D. Stuhbar, M.S. Twardowski, and J.R.V. Zaneveld. 2000. A new sensor for obtaining optical backscattering through determination of scattering at 3 angles in the backward hemisphere. AGU meeting, San Antonio, TX, January, 24–28.

Twardowski, M.S., P.L. Donaghay, R.A. Desiderio, and T.J. Cowles. 2000. Rapid, in situ formation of recalcitrant, chromophoric DOC. AGU meeting, San Antonio, TX, January, 24–28.

Boss, E., M.S. Twardowski, A. Barnard, and W. Pegau. 1999. Conservative and non-conservative behavior of optical properties in an inlet. ASLO Aquatic Sciences Meeting, February 1–5, Santa Fe, NM, p. 28.

Cowles, T.J., R.A. Desiderio, M.S. Twardowski, C.E. Wingard, and L.B. Eisner. 1999. Temporal evolution in the composition and structure of small-scale planktonic layers. ASLO Aquatic Sciences Meeting, February 1–5, Santa Fe, NM, p. 50.

Eisner, L.B., M.S. Twardowski, and T.J. Cowles. 1999. Phytoplankton pigment composition in relation to finescale optical properties in East Sound, Orcas Island, Washington. ASLO Aquatic Sciences Meeting, February 1–5, Santa Fe, NM, p. 61.

Radlinski, A.P., D.S. Edwards, N. Crawford, G.W. O’Brien, W.J.A. Witham, and M.S. Twardowski. 1999. Fluorimetry: new tools for petroleum exploration. Meeting of the American Association of Petroleum Geologists, Houston, TX.

Twardowski, M.S., R.A. Desiderio, P.L. Donaghay, and T.J. Cowles. 1999. Using finescale, in situ optical measurements to characterize DOM pool signatures in coastal waters. ASLO Aquatic Sciences Meeting, February 1–5, Santa Fe, NM, p. 181.

Dekshenieks, M.M., P.L. Donaghay, J.M. Sullivan, M.S. Twardowski, and J.E.B. Rines. 1998. Spatial and temporal occurrence of thin phytoplankton layers in relation to environmental forcing. EOS 79(1):176.

Donaghay, P.L., M.M. Dekshenieks, J.E.B. Rines, J.M. Sullivan, M.S. Twardowski, and D.V. Holliday. 1998. Physical and biological control of the formation, maintenance and dissipation of thin phytoplankton layers in the pycnoclines of stratified coastal waters. EOS 79(1):175.

Merrell, J.R., D.J. Gifford, P.L. Donaghay, M.M. Dekshenieks, M.S. Twardowski, and J.M. Sullivan. 1998. Fine-scale vertical distributions of microplankton in thin layers. EOS 79(1):186.

Rines, J.E.B., J.M. Sullivan, P.L. Donaghay, M.M. Dekshenieks, and M.S. Twardowski. 1998. Physical mixing processes and phytoplankton species composition of finescale bio-optical structures in coastal waters. EOS 79(1):147.

Twardowski, M.S., P.L. Donaghay, J.M. Sullivan, M.M. Dekshenieks, and J.E.B. Rines. 1998. Finescale production of chromophoric DOM associated with a persistent phytoplankton thin layer. EOS 79(1):176.

Dekshenieks, M.M., M.S. Twardowski, P.L. Donaghay, J.M. Sullivan, and J.E.B. Rines. 1997. Physical flow fields and phytoplankton distributions: implications for transport. ASLO Aquatic Sciences Meeting, February 10–14, Santa Fe, NM, p.143.

Donaghay, P.L., M.M. Dekshenieks, M.S. Twardowski, J.M. Sullivan, J.E.B. Rines, J. Katz, J. Zhang, S. King. 1997. Quantification of the zooplankton ambit. ASLO Aquatic Sciences Meeting, February 10–14, Santa Fe, NM, p.148.

Twardowski, M.S., J.M. Sullivan, M.M. Dekshenieks, J.E.B. Rines, and P.L. Donaghay. 1997. Spectral dissolved absorption signatures in coastal waters. ASLO Aquatic Sciences Meeting, February 10–14, Santa Fe, NM, p.327.

Donaghay, P.L., M.S. Twardowski, J.M. Sullivan, J.E.B. Rines, and A.K. Hanson. 1996. Optical layers in an isotropic coastal ocean: an ephemeral phenomenon or an inappropriate physical model? EOS 76(3):104.

Twardowski, M.S., J.M. Sullivan, and P.L. Donaghay. 1996. Spectral dissolved absorption measurements in the visible domain: resolving fine scale structure and dynamics in time and space. EOS 76(3):94.