Feature Publication Archive
Studying where some of the smallest organisms in the ocean are located can be difficult when they are found beneath the surface. In the late summer and early fall, phytoplankton in the Chukchi Sea are usually found in thin, patchy layers that can only be observed using shipboard surveys. In a collaborative effort between PMEL’s EcoFOCI group and the University of Alaska Fairbanks, scientists were able to map the distribution of subsurface phytoplankton using a novel high-resolution towed instrument platform. A significant fraction of the phytoplankton biomass is contained in these layers,... more »
Fassbender, A.J., C.L. Sabine, and M.F. Cronin (2016): Net community production and calcification from 7 years of NOAA Station Papa Mooring measurements. Global Biogeochem. Cycles, 30, doi:10.1002/2015GB005205.
Ocean Climate Station Papa is a time series site located in the eastern subarctic Pacific where atmospheric carbon dioxide is absorbed by the ocean. A moored buoy has been measuring the carbon content of both the surface ocean and surface atmosphere, along with numerous other oceanic and meteorological parameters, at this site for approximately 9 years. This area is notorious for having consistently low chlorophyll levels (a proxy for marine algae) and high concentrations of organisms that make hard shells out of calcium carbonate, commonly referred to as calcifiers, providing an... more »
Chapa-Balcorta, C., J.M. Hernandez-Ayon, R. Durazo, E. Beier, S.R. Alin, and A. Lopez-Perez (2015),Influence of post-Tehuano oceanographic processes in the dynamics of the CO2 system in the Gulf of Tehuantepec, Mexico, J. Geophys. Res. Oceans, 120, doi:10.1002/2015JC011249.
Pressure gradients between the Gulf of Mexico and the Tropical Eastern Pacific Ocean drive intense, intermittent northerly winds through gaps in the mountainous Central American isthmus. These wind jets have long been known to influence oceanographic conditions in the eastern tropical Pacific, from striking remote sensing images that show the effect of these northerly winds on sea surface temperature and wind speeds (http://www... more »
Larson, B.I., S.Q. Lang, M.D. Lilley, E.J. Olson, J.E. Lupton, K. Nakamura, and N.J. Buck (2015): Stealth export of hydrogen and methane from a low temperature serpentinization system. Deep-Sea Res. II, 121, 233–245, doi:10.1016/j.dsr2.2015.05.007.
The flow of energy from Earth to Ocean creates life-sustaining habitats in the deep sea that likely hosted some of the earliest life forms on the planet. Finding hydrothermal ecosystems often relies on identifiable plumes from "black smoker" vents that occur in close proximity to biological communities and produce a torrential flow of scalding hot, particle-rich fluid. In contrast, the Lost City hydrothermal system, located 15 km away from the nearest high temperature venting, represents a new paradigm of energy transfer: the slow leak of low temperature, chemically heated, gas-rich fluids... more »
Bernard, E., and V.V. Titov (2015): Evolution of tsunami warning systems and products. Philos. Trans. R. Soc. Lond. A, 373(2053), 20140371, doi:10.1098/rsta.2014.0371.
Each year, about 60,000 people and $4 billion (US$) in assets are exposed to the global tsunami hazard. Accurate and reliable tsunami warning systems provide a significant defense for this hazard. In this paper, Drs. Eddie Bernard and Vasily Titov (NOAA Center for Tsunami Research/Pacific Marine Environmental Laboratory) explore the evolution of science and technology used in tsunami warning systems and the evolution of their products using warning technologies. They suggest future directions for a new generation of these systems, concluding that coastal communities would be well served by... more »