PUBLICATIONS

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Publications

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Locker S.D., R.A. Armstrong, T.A. Battista, J.J. Rooney, C. Sherman, and D.G. Zawada. Geomorphology of Mesophotic Coral Ecosystems. Coral Reefs (in press).

Jiménez-Vélez B., Y. Detrés, R.A. Armstrong, and A. Gioda.  2009.  Characterization of African Dust (PM 2.5) across the Atlantic Ocean during AEROSE 2004.  Atmospheric Environment 43:2659–2664.

Torres J.L., R.A. Armstrong, and E. Weil. 2008. Enhanced ultraviolet radiation can terminate sexual reproduction in the broadcasting coral species Acropora cervicornis Lamarck. Journal of Experimental Marine Biology and Ecology 358:39-45.

Armstrong, R.A. 2007. Deep zooxanthellate coral reefs of the Puerto Rico - U.S. Virgin Islands insular platform. Coral Reefs, 26(4):945.

Suarez, E., J. Matta, M. Rolon, L. Maldonado, Y. Detrés, A. de la Motta, M. Gelado, J. Ramos, and R. Armstrong. (in press). Molecular identification of the bacterial burden in Sahara Dust Samples using a new method to improve the evidence for the effective management of public health measures during an SD event. Environmental Microbiology.

Detrés, Y., R. A. Armstrong and C. Betancourt. (in review) Culturable Fungal Species in African Dust Samples Reaching the Eastern Caribbean. Science of the Total Environment.

Torres J.L., R.A. Armstrong, J.E. Corredor, and F. Gilbes. 2007. Physiological responses of Acropora cervicornis to increased solar irradiance. Photochemistry and Photobiology 83:839-850.

Morris, V., T.W. Yu, E. Joseph, R. Armstrong, R. Fitzgerald, R. Karim, X.Z. Liang, and Q. Min. 2007. The NOAA Center for Atmospheric Sciences (NCAS): Programs and Achievements. Bulletin of the American Meteorological Society, 88(2):141-145.

Matta, J.L., J. M. Ramos, R.A. Armstrong, and H. D’Antoni. 2007. Response of Human Fibroblasts to Very Low Doses of Environmental UV Radiation. Caribbean Journal of Dermatology and Therapeutics 2:16-27.

Morris, V., P. Clemente-Colon, N.R. Nalli, E. Joseph, R.A. Armstrong, Y. Detrés, M.D. Goldberg, P.J. Minnett, and R. Lumpkin. 2006. AEROSE Science Team Conducts Ongoing Investigations of Downwind Transport from Saharan and Sub-Saharan Africa in the Tropical Atlantic. EOS Transactions, American Geophysical Union 87(50):565-571.

Costa, C. S. B., R. Armstrong, Y. Detrés, E. W. Koch, M. Bertiller, A. Beeskow, L. S. Neves,G. M. Tourn, O. A. Bianciotto, L. B. Pinedo, A. Y. Blessio, and N. San Roman. 2006. Effect of Ultraviolet-B Radiation on Salt Marsh Vegetation: Trends of the Genus Salicornia along the Americas. Photochemistry and Photobiology 82: 878–886.

Díaz, S., C. Camilion, G. Deferrari, H. Fuenzalida, R. Armstrong, C. Booth, A. Paladini, S. Cabrera, C. Casiccia, C. Lovengreen, J. Pedroni, A. Rosales, H. Zagarese, and M. Vernet. 2006. Ozone and UV Radiation over Southern South America: Climatology and Anomalies. Photochemistry and Photobiology 82: 834-843.

Armstrong, R.A., H. Singh, J. Torres, R. Nemeth, A. Can, C. Roman, R. Eustice, L. Riggs, and G. Garcia-Moliner. 2006. Characterizing the deep insular shelf coral reef habitat of the Hind Bank Marine Conservation District (US Virgin Islands) using the Seabed Autonomous Underwater Vehicle. Continental Shelf Research 26: 194-205.

Díaz, S., C.R. Booth, R. Armstrong, C. Brunat, S. Cabrera, C. Camilion, C. Cassiccia, G. Deferrari, H. Fuenzalida, C. Lovengreen, A. Paladini, J. Pedroni, A. Rosales, H. Zagarese, and M. Vernet. 2005. Multi-channel radiometers calibration: A new approach. Applied Optics 44 (26): 5374-5380.

Schweizer, D., R.A. Armstrong, and J. Posada. 2005. Remote sensing characterization of benthic habitats and submerged vegetation biomass in los Roques Archipelago National Park, Venezuela. Intl. J. of Remote Sensing 26(12): 2657-2667.

Matta, J., J. Ramos, R. Armstrong, and H. D’Antoni. 2005. Environmental UVA and UVB Threshold Doses for Apoptosis and Necrosis in Human Fibroblasts. Photochemistry and Photobiology 81: 563-568.

Ramos, J., Villa, J., Ruiz, A., Armstrong, R., and J. L. Matta. 2004. UV dose determines key characteristics of non-melanoma skin cancer. Cancer Epidemiology, Biomarkers & Prevention 13(12): 2006-2011.

Armstrong, R.A., F. Gilbes, R. Guerrero, C. Lasta, and H. Miazán. 2004. Validation of SeaWiFS chlorophyll algorithm for the Rio de la Plata Estuary and adjacent waters. Intl. J. of Remote Sensing 25(7-8):1501-1505.

Gilbes, F. and R.A. Armstrong. 2004. Phytoplankton dynamics in the eastern Caribbean Sea as detected by space remote sensing. Intl. J. of Remote Sensing 25(7-8):1449-1452.

Corredor, J., J. Morell, J. López, J. Capella and R.A. Armstrong. 2004. Cyclonic Eddy Entrains Orinoco River Plume in Eastern Caribbean. EOS Transactions, American Geophysical Union 85(20):197, 201-202.

Singh, H., R.A. Armstrong, R. Eustice, C. Roman, O. Pizarro, and J.Torres. 2004. Imaging Coral I: Imaging Coral Habitats with the SeaBED AUV. Subsurface Sensing Technologies and Applications 5(1):25-42.

Corredor, J., J. Morell, J. López, R. Armstrong, A. Dieppa, C. Cabanillas, A. Cabrera and V. Hensley. 2003. Remote continental forcing of phytoplankton biogeochemistry: Observations across the “Caribbean-Atlantic front”. Geophysical Research Letters 30(20):1-4.

Armstrong, R.A., H. Singh, and F. Gilbes. 2002. Benthic Survey of Insular Slope Coral Reefs Using the SeaBED AUV. Backscatter 13(3): 22-25.

Gilbes, F., R.A. Armstrong, R. Webb, and F. Muller-Karger. 2001. SeaWiFS Helps Assess Hurricane Impact in the Caribbean Sea. EOS, Transactions, American Geophysical Union, Vol. 82, No. 45, pages 529 and 533.

Detrés, Y., R.A. Armstrong, and X. Connelly. 2001. Ultraviolet-induced responses in two species of climax tropical marine macrophytes. Photochemistry and Photobiology 62 (1-2):55-66.

Armstrong, R.A., J. Lopez, and F. Gilbes. 2000. Apparent optical properties at the Caribbean Time Series Station. Ocean Optics XV – CDROM Publication.

Gilbes, F., and R.A. Armstrong. 2000. Inherent optical properties at the Caribbean Time Series Station (CaTS). Ocean Optics XV – CDROM Publication.

Corredor, J., A.W. Bruckner, F. Muszynski, R.A. Armstrong, and J.M. Morell. 2000. UV-absorbing compounds in three species of Caribbean zooxanthellate corals: depth distribution and spectral response. Bulletin of Marine Science 67:821-830.

Navarro, A., J. Corredor, J. Morell, and R.A. Armstrong. 2000. Distribution of the cyanophyte Trichodesmium in the Eastern Caribbean Sea: Influence of the Orinoco River. Intl. J. of Tropical Biology 48(1).

Muszynski, F., A. Bruckner, R.A. Armstrong, J.M. Morell, and J.E. Corredor. 1998. Within-colony variations of UV absorption in a reef building coral. Bull. Mar. Sci., 63(3): 589-594.

Matta, J.L., C.M. Nazario, R.A. Armstrong, and J. Navas. 1998. Epidemiological trends of melanoma in Puerto Rico from 1975 – 1991. Boletín de la Asociación Médica de Puerto Rico 90(1-3): 221-224.

Stoner, A.W., P.A. Pitts, and R.A. Armstrong. 1996. The interaction of physical and biological factors in the large-scale distribution of queen conch populations in seagrass meadows. Bull. Mar. Sci., 58(1): 217-233.

Johnson, L., B. Lobitz, R. Armstrong, R. Baldy, E. Weber, J. DeBenedictis, and D. Bosch. 1996. Remotely sensed observations of phylloxera-infested vineyard in the Napa Valley. California Agriculture (50) 4:14-18.

Armstrong, R.A. 1994. Oceanic fronts in the northeastern Caribbean revealed by satellite ocean color imaging. International Journal of Remote Sensing 15(6): 1169-1171.

D'Antoni, H., R. Armstrong, J. Coughlan, J. Skiles, and G. Daleo. 1994. Effects of stratospheric ozone depletions and increased levels of ultraviolet radiation on subantartic forests and western patagonian steppe: A research project. In: Stratospheric Ozone Depletion/UV Radiation in the Biosphere, R.H. Biggs and M. Joyner (eds.), NATO ASI Series, Vol I 18, Springer-Verlag, Berlin.

Stoner, A.W., M.D. Hanisak, N.P. Smith, and R.A. Armstrong. 1994. Large-scale distribution of queen conch nursery habitats: Implications for stock enhancement. pp. 169-189 In: R.S. Appeldorn and Q. Rodriguez (eds.) Queen Conch Biology, Fisheries and Mariculture. Fundación Científica Los Roques, Caracas, Venezuela.

Armstrong, R.A. 1993. Remote sensing of submerged vegetation canopies for biomass estimation. International Journal of Remote Sensing 14(3): 621-627.

Goenaga, C., V.P. Vicente, and R.A. Armstrong. 1989. Bleaching induced mortalities in reef corals from La Parguera, Puerto Rico: A precursor of change in the community structure of coral reefs? Carib. J. Sci., 25(1-2): 59-65.

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Presentations and Published Abstracts

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Armstrong, R.  2009.  Mesophotic Coral Ecosystems.  Invited Oral Presentation to the Steering Committee of the U.S. Coral Reef Task Force, November 2, San Juan, Puerto Rico.

Armstrong, R., L. Guild, B. Lobitz, J. Goodman, R. Berthold, and J. Kerr. 2009. Coral Reef Bleaching and Threats to Biodiversity in Puerto Rico. Oral Presentation at the NASA Biodiversity and Ecological Forecasting Team Meeting, May 6-8, New York, New York.

Guild, L., J. Goodman, B. Lobitz, R. Armstrong, F. Gilbes, R. Berthold, and J. Kerr. 2009. Imaging Spectroscopy and Spectral Analysis in Support of Coral Reef Ecosystem Biodiversity Research, 33^rd Intl. Remote Sensing of Environment, May 4-8, Stresa, Italy.

Armstrong, R.  2009.  Variability of bio-optical properties in southwestern Puerto Rico: the link to coral reef community structure. Invited Oral Presentation at the UPRM-CRES Symposium, February 11-13, La Parguera, Puerto Rico.

Armstrong RA, H. Singh, J. Torres. 2002. Benthic survey of insular slope coral reefs using the SeaBED AUV.  Backscatter 13(3):22-25

Rivero-Calle S, R.A. Armstrong, F.J. Soto-Santiago. 2009. Biological and physical characteristics of a mesophotic coral reef: Black Jack reef, Vieques, Puerto Rico. Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, July 2008: 567-571.

Guild, L., B. Lobitz, R.A. Armstrong, F. Gilbes, A. Gleason, J. Goodman, E. Hochberg, M. Monaco, R. Berthold, and J. Kerr. 2008. NASA Airborne AVIRIS and DCS Remote Sensing of Coral Reefs. Poster Presentation, 11th International Coral Reef Symposium, July 7-11, Ft. Lauderdale, FL.

Lobitz, B., L. Guild, M. Montes, R.A. Armstrong, and J. Goodman. 2008. Pre-Processing of 2005 AVIRIS Data for Coral Reef Analysis. Poster Presentation, 11th International Coral Reef Symposium, July 7-11, Ft. Lauderdale, FL.

Torres, J., R.A. Armstrong, and E. Weil. 2008. Effects of UV Radiation on the Sexual Reproduction of the Threatened Acropora Cervicornis. Poster Presentation, 11th International Coral Reef Symposium, July 7-11, Ft. Lauderdale, FL.

Armstrong, R. 2008. Impacts of Saharan Dust Events in the Tropical Western Atlantic. Oral Presentation, Calentamiento Global y Fenómenos Atmosféricos, 2do Curso de Verano, June 1-6, San Juan, Puerto Rico.

Armstrong, R. 2008. Mesophotic Coral Reefs: Reservoirs of Biodiversity in Times of Climate Change? Oral Presentation, Calentamiento Global y Fenómenos Atmosféricos, 2do Curso de Verano, June 1-6, San Juan, Puerto Rico.

Armstrong, R. 2008. Hyperspectral remote sensing of benthic marine communities in La Parguera. Oral Presentation at the Sixth Annual NOAA-CREST Remote Sensing Symposium, February 20-24, Mayaguez, Puerto Rico.

Rivero, S., and R.A. Armstrong. 2007. Use of the Seabed Autonomous Underwater Vehicle for Characterizing the Deep Zooxanthellate Coral Reefs of Puerto Rico. 33rd Scientific Meeting of the Association of Marine Laboratories of the Caribbean. St. Thomas, USVI, June 4-8.

Armstrong, R. A., L. Guild, B. Lobitz, F. Gilbes, and Y. Detres. 2007. Atmospheric and Water Column Corrections of AVIRIS Data for Hyperspectral Characterization of Benthic Marine Communities in Puerto Rico. Proceedings, 5th EARSeL (European Association of Remote Sensing Laboratories), 23-25 April, Bruges, Belgium.

Armstrong, R. A., and H. Singh. 2006. Remote Sensing of Deep Coral Reefs in Puerto Rico and the U.S. Virgin Islands Using the Seabed Autonomous Underwater Vehicle. SPIE Europe Remote Sensing Conference Proceedings #6360-10, Stockholm, Sweden, September 11-14.

Goodman, J., M. Velez-Reyes, and R. A. Armstrong. 2006. Development of a Field Test Environment for the Validation of Coastal Remote Sensing Algorithms: Enrique Reef, Puerto Rico. SPIE Europe Remote Sensing Conference Proceedings #6360-11, Stockholm, Sweden, September 11-14.

Vélez-Reyes, M., J. Goodman, L. O. Jimenez-Rodriguez, R. A. Armstrong, and S. D. Hunt, 2006. Benthic Habitat Mapping using Hyperspectral Remote Sensing. SPIE Europe Remote Sensing Conference Proceedings #6360-12, Stockholm, Sweden, September 11-14.

Kaeli, J.W., h. Singh, and R.A. Armstrong. 2006. An Automated Morphological Image Processing Based Methodology for Quantifying Deep Water Coral Cover. Oceans 2006 MTS/IEEE Conference, September 18-22, Boston, MA.

Gilbes, F., R.A. Armstrong, J. Goodman, M. Velez, S. Hunt. 2006. CenSSIS Seabed: Diverse Approaches for Imaging Shallow and Deep Coral Reefs. Proceedings Ocean Optics XVIII Conference, October 9-13, Montreal, Quebec.

Armstrong, R.A., J.R. García, G. García-Moliner, and H. Singh. 2006. The Deep Hermatypic (Zooxanthellate) Coral Reef Habitat of the US Caribbean: Addressing the Needs of Ecosystem-Based Management. Oral Presentation at ASLO Summer Meeting, June 4-9, Victoria, Canada.

Detres, Y., R.A. Armstrong, E. Otero, and R. Garcia. 2006. Remote Sensing of Episodic Rainfall Events Impacting Coral Reef Areas. Oral Presentation at ASLO Summer Meeting, June 4-9, Victoria, Canada.

Bejarano, I., R. H. Appeldoorn, R. A. Armstrong. 2006. Relationship between Reef Fish Communities, Water and Habitat Quality on Coral Reefs. Poster Presentation at ASLO Summer Meeting, June 4-9, Victoria, Canada.

Armstrong, R.A. 2006. Coral Reef Bio-Optics, Southwestern Puerto Rico. Oral Presentation at Fourth Science Meeting NOAA ICON/CREWS, April 24-26, La Parguera, Puerto Rico.

Armstrong, R.A. 2006. S4 Coral Reef Monitoring: Why Coral Reefs? Oral Presentation at CenSSIS/NSF Site Visit, April 4-6, Boston, MA.

Armstrong, R. A., and Singh, H. 2005. Imaging Deep Coral Reefs Using the Seabed Autonomous Underwater Vehicle. Invited Seminar, Ecosystem Science and Technology Branch, NASA Ames Research Center, November 28, 2005.

Armstrong, R. A., and Singh, H. 2005. Mapping the Pristine Coral Reefs of the Deeper Puerto Rico-Virgin Island Insular Platform and Slope Using an Autonomous Underwater Vehicle. Oral presentation, ASLO Summer Meeting, June 19-24, Santiago de Compostela.

Cedeño, D. J., and Armstrong, R. A. 2005. Population Dynamics of the Harmful

Dinoflagellate Cochlodinium Polykrikoides in Southwestern Puerto Rico. Poster presentation, ASLO Summer Meeting, June 19-24, Santiago de Compostela.

Detrés, Y., Morris, V., Lozada, A. R., and Armstrong, R.A. 2005. Mass Concentration and Deposition of Iron and Carbon Across the Atlantic Ocean During a Saharan Dust Storm. Poster presentation, ASLO Summer Meeting, June 19-24, Santiago de Compostela.

Armstrong, R.A. 2005. Saharan Dust Aerosol Research in Puerto Rico. Invited oral presentation, Joint Meeting of the EPSCoR-NASA/GSFC in Mayaguez, Puerto Rico, March 21.

Morris, V., L. Roldan, R. A. Armstrong, and Y. Detrés. 2005. Size-Resolved Aerosol Mass and Aerosol Number Distributions During the NOAA Center for Atmospheric Sciences (NCAS) Trans-Atlantic Saharan Dust Aerosol and Oceanographic Science Expedition (AEROSE). Extended Abstracts of the 7th Conference on Atmospheric Chemistry Annual Meeting of the American Chemical Society, Jan 9-13, San Diego, California.

Lopez, J.M., Corredor, J.E., Morell, J.M., Capella, J.E., Armstrong, R.A., and Canals, M. 2004. Oceanic Core Eddy Spins Orinoco River Plume Water. Ocean Optics XVII, Oct 25-29, Freemantle, Australia

Singh, H., R.A. Armstrong, Y. Detres, G. Garcia-Moliner, K. Foote, L. Guild, J. Lindholm, R. Nemeth, and P. Valentine. 2004. The Seabed AUV and its use in Habitat Characterization. Oral presentation, ASLO/TOS Ocean Sciences Conference, Honolulu, February 15-20.

Ramos, J., J. Villa, A. Ruiz, R. Armstrong, and J. Matta. DNA repair and UV exposure influence important characteristics of non-melanoma skin cancer. AACR 95th Annual Meeting, Orlando, FL, March 2004.

Matta, J., R. Armstrong, A. Ruiz, and J. Ramos. UV dose and DNA repair capacity predict non-melanoma skin cancer risk. AACR 95th Annual Meeting, Orlando, FL, March 2004.

Armstrong, R.A., B. Jimenez and Y. Detrés. 2003. Mass measurements of Saharan dust aerosols in Puerto Rico. Abstract and Poster, AGU Fall Meeting, San Francisco, CA, Dec. 8-12.

Detrés, Y, and R.A. Armstrong. 2003. Characterization of viable fungal spores in PM 2.5 filter samples reaching the Eastern Caribbean. Abstract and Poster, AGU Fall Meeting, San Francisco, CA, Dec. 8-12.

Rivera-Denizard, O., C. Betancourt, R.A. Armstrong and Y. Detres. 2003. Airborne Fungi in Sahara Dust Aerosols Reaching the Eastern Caribbean: I. Taxonomic Characterization by Morphological Features. Abstract and Poster, AGU Fall Meeting, San Francisco, CA, Dec. 8-12.

De La Mota, A., C. Betancourt, Y. Detrés and R.A. Armstrong. 2003. Airborne Fungi in Sahara Dust Aerosols Reaching the Eastern Caribbean: II. Species Identification Using Molecular Techniques. Abstract and Poster, AGU Fall Meeting, San Francisco, CA, Dec. 8-12.

Guild, L., B. Ganapol, P. Kramer, R. Armstrong, A. Gleason, J. Torres, L. Johnson, and N. Garfield. 2003. Clues to coral reef ecosystem health: spectral analysis coupled with radiative transfer modeling, Eos. Trans. AGU 84(46), Fall Meet. Suppl., Abstract OS22D-08, San Francisco, CA, Dec.8-12.

Díaz, S., C. Camilion, G. Deferrari, C. Brunat, C. Booth, R. Armstrong, S. Cabrera, C. Cassiccia, H. Fuenzalida, C. Lovengreen, A. Paladini, J. Pedroni, A. Rosales, H. Zagarese, M. Vernet. 2003. An algorithm to retrieve biologically weighted irradiance from multi-channel radiometer measurements. European Society of Photobiology 2003 Meeting.

S. Diaz, R. Booth, R. Armstrong, S. Cabrera, C. Cassiccia, H. Fuenzalida, C. Lovengreen, A. Paladini, J. Pedroni, A. Rosales, H. Zagarese, C. Brunat, G. Deferrari, C. Camilion, M. Vernet. 2003. Calibration improvement of the IAI Network for the measurement of UVR: Multi-channel instruments, in Ultraviolet Ground- and Space-based Measurements, Models, and Effects II, W. Gao, J. R. Herman, G. Shi, K. Shibasaki, J. R. Slusser, eds., Proceedings SPIE 4896, 106-113.

Armstrong, R.A. and Y. Detrés. Airborne Fungi in Sahara Dust Aerosols Reaching the Caribbean Region. Oral Presentation, Joint EPSCor – NOAA Climate Change Meeting, University of Puerto Rico, Mayaguez, January 9-11, 2003.

Duarte, J., M. Vélez, S.Tarantola, F. Gilbes, and R. Armstrong. A probabilistic sensitivity analysis of water-leaving radiance to water constituents in coastal shallow waters. In Ocean Remote Sensing and Imaging, Proceedings of SPIE Vol. 5155, August 2003.

Matta, J.L., J. Ramos, J. L.Villa, A. Ruiz, R. A. Armstrong, and L. Grossman, 2002. Skin cancer in Puerto Rican populations. RCMI International Symposium, Honolulu, Hawaii.

Guild, L., B. Ganapol, P. Kramer, R. Armstrong, A. Gleason, J. Torres, L. Johnson, and T. Garfield. Clues to Coral Reef Health: Integrating Radiative Transfer Modeling and Hyperspectral Data. Presented at the Nearshore Processes (Ocean Sciences) Session of the AGU Fall Meeting, San Francisco, CA, Dec. 6-10, 2002.

Armstrong, R.A., Variability of Bio-optical Oceanographic Properties in Coral Reef Areas. Abstract and Poster, Ocean Optics XVI, Santa Fe, New Mexico, November 18-22, 2002.

Gilbes, F., Armstrong, R., Miller, R.L., Del Castillo, C.E., Rosado, M., and Ramirez, N., Bio-Optical Evidence of Land-Sea Interactions in the Western Coast of Puerto Rico. Oral and Poster Presentation, Ocean Optics XVI Meeting, Santa Fe, New Mexico, November 18-22, 2002

Lee-Borges, J., F. Gilbes, and R.A. Armstrong. SeaWiFS Validation at the Caribbean Time Series Station (CaTS). Abstract and Poster, Ocean Optics XVI, Santa Fe, New Mexico, November 18-22, 2002.

Rosado, M., Gilbes, F., Armstrong, R. and Lee-Borges, J., Validation of Bio-Optical Algorithms in the Western Coast of Puerto Rico. Poster Presentation, Ocean Optics XVI Meeting, Santa Fe, New Mexico, November 18-22, 2002.

Torres, J.L., and R.A .Armstrong. 2001. Photosynthetic pigments associated with the endosymbionts of the shallow-water corals Acropora cervicornis and Porites porites. Accepted as oral presentation in ASLO 2001, Albuquerque, New Mexico, Feb. 12-16.

Matta, J.L., M. Morales, R.A. Armstrong, and H. D’Antoni. 2001. Mechanisms UV induced free radical oxidative damage in human skin fibroblasts. Published abstract in Free Radical Biology and Medicine 31:11, Suppl. 1.

Matta, J.L., R.A. Armstrong, and M. Morales. 2000. Mechanisms of UV-A and UV-B induced free radical oxidative damage in human skin fibroblasts. 7th Annual Meeting of the Oxygen Society. San Diego, CA, November 16-20.

Matta, J.L., M. Morales, and R. Armstrong. 2000. DNA adduct production in human skin fibroblasts after exposure to environmental levels of UVA and UVB in Puerto Rico. Presented at the 7th RCMI International Symposium, San Juan, Puerto Rico, November 12-16.

Armstrong, R.A., F. Gilbes, R. Guerrero, and C. Lasta. 2000. Validation of SeaWiFS Chlorophyll Algorithm for the Rio De La Plata Estuary. Oceans from Space “Venice 2000”, 9-13 October.

Gilbes, F., and R.A. Armstrong. 2000. Space Remote Sensing of the Eastern Caribbean Sea. Oceans from Space “Venice 2000”, 9-13 October.

Torres, J.L. and R.A. Armstrong. 2000. Spectral characteristics of Acropora cervicornis and Porites porites under laboratory conditions. In: Abstract volume of 9th Int. Coral Reef Symposium. Bali, Indonesia. Oct. 23-27, 2000. p. 240.

Detrés, Y. and R.A. Armstrong. 2000. Ultraviolet-induced photoinhibition and flavonoid synthesis in Thalassia testudinum. American Society of Limnology and Oceanography (ASLO) Meeting, Copenhagen, June 5-9.

Armstrong, R.A. and D. Cedeño. 2000. Optical Properties of a Toxic dinoflagellate in Southwestern Puerto Rico. Proceedings, Sixth International Conference Remote Sensing for Marine and Coastal Environments. ERIM, Charleston, South Carolina, May 1-3.

Sastre, M., and R. A. Armstrong. 2000. SeaWiFS Estimates of Ocean Primary Productivity in the Caribbean Sea. NASA University Research Conference (NANURC), April 7-10, Nashville, Tennessee.

Torres, J.L. and R.A. Armstrong. 2000. Preliminary study on the spectral response of some Caribbean coral species. 35th ACS Junior Technical Meeting and the 20th Puerto Rico Interdisciplinary Scientific Meeting, University of Puerto Rico, Rio Piedras, March 11.

Armstrong, R.A.  1999,  Mesoscale Effects of the Orinoco River Plume. Astrobiology: El Niño and South American Ecosystems, INIDEP, Mar del Plata, April 7-9.                                           

Armstrong R. A. and Y. Detrés.  1999.  Attenuation coefficients of downwelling ultraviolet and visible irradiance in near shore tropical waters. ASLO ‘99 Santa Fe, NM. Feb. 1-5.

Detrés, Y. and R. A. Armstrong.  1999.  Aging of filters used in UV-B supplementation and exclusion experiments. Poster presented at ASLO ‘99 Santa Fe, NM. Feb. 1-5.

Connelly, X. and R. A. Armstrong.  1999.  Effects of ultraviolet radiation on the photoprotective pigments of the red mangrove (Rhizophora mangle). Poster presented at ASLO ‘99 Santa Fe, NM. Feb. 1-5.

Armstrong, R.A. 1999.  Oceanographic remote sensing research in Puerto Rico: The first 15 years, XXI Congreso de Investigación Científica, February 11-12, San Juan, Puerto Rico.

Detrés, Y. and R. A. Armstrong.  1998.  Measurements of UV-B radiation reaching tropical marine benthic ecosystems. Poster presented at the American Association of Limnology and Oceanography June 6-11.

Connelly, X. and R. A. Armstrong.  1998.  Effects of ultraviolet radiation on red mangrove (Rhizophora mangle) optical properties.  Poster presented at the American Association of Limnology and Oceanography. June 6-11.

Armstrong, R.A.  1997.  Hyperspectral remote sensing of phytoplankton pigments in the eastern           Caribbean.  Fourth International Conference on Remote Sensing for Marine and Coastal        Environments, Orlando, Florida, 17-19 March.

Jones, R.L., R.A. Armstrong and A.W. Stoner.  1997.  The Application of GIS and remote        sensing in a spatial analysis of queen conch nursury habitats.  Fourth International      Conference on Remote Sensing for Marine and Coastal Environments, Orlando, Florida,      17-19 March.

Armstrong, R.A., J.M. Morell, J.E. Corredor.  1997.  Monitoring UV radiation in the tropics and           the effect of UV-B on shallow water marine organisms.  American Society of Limnology        and Oceanography Aquatic Sciences Meeting, Santa Fe, New Mexico, Feb.10-14.

Detrés, Y. and R.A. Armstrong.  1997.  Effects of ultraviolet radiation in photoprotective and photosynthetic pigments in the tropical marine macrophyte Thalassia testudinum.             American Society of Limnology and Oceanography Aquatic Sciences Meeting, Santa Fe,           New Mexico, Feb. 10-14.

Armstrong, R.A.  1997.  UV photoprotection in tropical marine organisms. Proceedings of the   NASA URC Technical Conference (URC-TC ‘97), Feb. 16-19, Alburquerque, New     Mexico, Vol. 1,  pp. 857-862.

Navarro, A., J. Corredor, R. Armstrong, and J. Morell.  1997.  Optical properties of        Trichodesmium sp. photosynthetic pigments in the Caribbean Sea south of Puerto Rico.         Abstract, IX  EPSCoR Annual Meeting, May 23-24, Fajardo, Puerto Rico.

Armstrong, R.A.  1997.  Percepción  remota de parámetros biofísicos del mangle rojo Rhizophora         mangle (Rhizophoraceae).  Proceedings, 28th Annual Meeting of the Association of Marine       Laboratories of the Caribbean, San José, Costa Rica, July 21-25.

Armstrong, R.A., J.M. Morell, J.E. Corredor, and J.M. López.  1996.  Remote sensing    reflectance of eastern Caribbean waters influenced by the Orinoco River plume.  EOS,   Transactions, American Geophysical Union, Vol. 76, No. 3.

Corredor, J.E.,  J.M. Morell,  R.A. Armstrong, and J.M. López.  1996.   Influenced of the          Orinoco River plume on mixed layer features of the eastern Caribbean.  EOS,     Transactions, American Geophysical Union, Vol. 76, No. 3.

Gilbes, F. and R.A. Armstrong.  1996.  AVHRR detection of Orinoco River plume waters in the          eastern Caribbean. EOS, Transactions, American Geophysical Union, Vol. 76, No. 3.

Morell, J.M., J.E. Corredor, R.A. Armstrong, and J.M. Lopez.  1996.   The effects of      massive riverine input upon planktonic respiration in the eastern Caribbean.  EOS, Transactions, American Geophysical Union, Vol. 76, No. 3.

López, J.M., A. Dieppa, E. Alfonso, R.A. Armstrong, J.M. Morell, and J.E. Corredor, 1996.      Bio-optical observations of the eastern Caribbean Sea.  EOS, Transactions, American            Geophysical Union, Vol. 76, No. 3.

Armstrong, R.A. and D.W. Bolgrien.  1995.  Hyperspectral remote sensing of organic and         inorganic material in optically-complex waters.  Proc. Conference for Remote Sensing and Environmental Monitoring for the Sustained Development of the Americas, March 21-22, San Juan, Puerto Rico.