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Creator:: Brook, Edward J., Kurz, Mark D., Curtice, Joshua, and Cowburn, Stuart
Abstract:: Measurements of helium isotopes in particles separated from polar ice demonstrate that extraterrestrial ³He dominates the ³He flux at the GISP2 (Greenland) and Vostok (Antarctica) ice core sites. Replicate measurements of late Holocene ice samples yield ³He fluxes of 0.62±0.27×10⁻¹² cm³ STP cm⁻² ka⁻¹ (GISP2) and 0.77 ± 0.25 ×...
Resource Type:: Article
Full Text:: , USA Mark D. Kurz and Joshua Curtice Department of Marine Chemistry and Geochemistry, Woods Hole

Creator:: Brown, Erik Thorson, Brook, Edward J., Raisbeck, Grant M., Yiou, Francoise, and Kurz, Mark D.
Abstract:: We have measured cosmic ray produced ¹⁰Be (t₁/₂ = 1.5 My) and ²⁶Al (t₁/₂ = 0.72 My) as functions of depth in a core of quartz sandstone bedrock collected in South Victoria Land, Antarctica. These data were used to place limits on the exposure age and erosion rate of the...
Resource Type:: Article
Full Text:: . Brook 2, Grant M. Raisbeckl, Fran•oise YiouI, and Mark D. Kurz2 Abstract. We have measured cosmic ray

Creator:: Nielsen, Mark E. and Fisk, Martin R.
Abstract:: These first measurements of specific surface area (SSA) of bulk samples of subsurface marine basalts were undertaken to determine the potential area available for microbial colonization. SSA ranged from 0.3 to 52 m2/g of basalt with the lowest value coming from pillow basalt and the highest value from breccia. The...
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Full Text:: : Implications for the subseafloor microbial biomass Mark E. Nielsen1 and Martin R. Fisk2 Received 24 May 2010

Creator:: Somes, Christopher J., Schmittner, Andreas, and Altabet, Mark A.
Abstract:: Nitrogen (N) fixation by specialized microorganisms (diazotrophs) influences global plankton productivity because it provides the ocean with most of its bio-available N. However, its global rate and large-scale spatial distribution is still regarded with considerable uncertainty. Here we use a global ocean nitrogen isotope model, in comparison with δ15NO3 observations,...
Resource Type:: Article
Full Text:: . Somes,1 Andreas Schmittner,1 and Mark A. Altabet2 4 Received 1 July 2010; revised 8 September 2010

Creator:: Matheson, Mark A., Coakley, James A., and Tahnk, William R.
Abstract:: Empirical estimates of the aerosol indirect radiative forcing often rely on threshold cloud retrievals applied to multispectral satellite imagery data. In such retrievals, pixels having radiances that surpass prescribed thresholds are assumed to be overcast even if they are only partially cloud covered. This assumption leads to cloud visible optical...
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Full Text:: aerosol indirect radiative forcing Mark A. Matheson,1,2 James A. Coakley Jr.,1 and William R. Tahnk1

Creator:: Moore, Keith J., Abbott, Mark R., Richman, James G., Smith, Walker O., Cowles, Timothy J., Coale, Kenneth H., Gardner, Wilford D., and Barber, Richard T.
Abstract:: SeaWiFS estimates of surface chlorophyll concentrations are reported for the region of the U.S. JGOFS study in the Southern Ocean (∼ 170 °W, 60 °S). Elevated chlorophyll was observed at the Southern Ocean fronts, near the edge of the seasonal ice sheet, and above the Pacific Antarctic Ridge. The elevated...
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Full Text:: data from the Southern Ocean J. Keith Moore l, Mark R. Abbott l, James G. Richman l, Walker O. Smith

Creator:: Goni, Miguel A., Thunell, Robert C., Woodwort, Mark P., and Müller-Karger, Frank E.
Abstract:: Analysis of sediments from two wind-driven upwelling systems, Guaymas and Cariaco basins, using the alkenonebased U_37^(K^' ) paleothermometer yielded high-resolution records of sea surface temperatures (SST) from 1700 to 2000 AD. The trends in the U K'/37 index reveal steady SST increases of 1 to 2°C at both sites since...
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Full Text:: last three centuries: Interocean teleconnections Miguel A. Goni,1 Robert C. Thunell,2 Mark P

Creator:: Piola, Alberto R., Matano, Ricardo P., Palma, Elbio D., Moller, Osmar O., and Campos, Edmo J. D.
Abstract:: The influence of the Plata, the second largest river in South America, extends along a coastal strip of 1300 km. Historical hydrographic and wind data and numerical simulations are combined to determine the seasonal and interannual variability of the Plata plume and its relationship to the magnitude of the river...
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Full Text:: the western South Atlantic shelf Alberto R. Piola,1 Ricardo P. Matano,2 Elbio D. Palma,3 Osmar O

Creator:: Pierce, Stephen D., Barth, John A., Thomas, Rebecca E., and Fleischer, Guy W.
Abstract:: In the northern California Current, the onset of the 2005 upwelling season was five weeks later than usual, and well established upwelling with a cold surface signature did not occur until about seven weeks after this. As part of the joint US-Canada Pacific hake survey, from 14–16 July 2005 we...
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Full Text:: California Current: Historical context and the significance of cumulative wind stress Stephen D. Pierce,1

Creator:: Shroyer, E. L., Moum, J. N., and Nash, J. D.
Abstract:: Comprehensive observations of velocity, density, and turbulent dissipation permit quantification of the nonlinear internal wave (NLIW) contribution to vertical heat flux and lateral mass transport over New Jersey’s shelf. The effect of NLIWs on the shelf heat budget was significant. On average, heat flux in NLIWs was 10 times larger...
Resource Type:: Article
Full Text:: and lateral mass transport in nonlinear internal waves E. L. Shroyer,1,2 J. N. Moum,1 and J. D. Nash1

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