The overflow of deep water from the Nordic seas
into the North Atlantic plays a critical role in global ocean
circulation and climate. Approximately half of this overflow
occurs via the Iceland–Scotland (I–S) overflow, yet the history
of its strength throughout the Holocene (~0–11 700 yr
ago, ka) is poorly...
Full Text:
Holocene
Thornalley, D. J. R., Blaschek, M., Davies, F. J., Praetorius, S., Oppo, D. W.,
McManus, J. F
The overflow of deep water from the Nordic seas
into the North Atlantic plays a critical role in global ocean
circulation and climate. Approximately half of this overflow
occurs via the Iceland–Scotland (I–S) overflow, yet the history
of its strength throughout the Holocene (~0–11 700 yr
ago, ka) is poorly...
Full Text:
., McManus, J. F., Oppo, D. W., and Curry, W. B.: Episodic
reductions in bottom-water currents since the
The overflow of deep water from the Nordic seas
into the North Atlantic plays a critical role in global ocean
circulation and climate. Approximately half of this overflow
occurs via the Iceland–Scotland (I–S) overflow, yet the history
of its strength throughout the Holocene (~0–11 700 yr
ago, ka) is poorly...
This study is composed of two parts. Section I deals with
developed moorages and marinas--where they are; what services are
offered in each, and how well the existing supply of permanent moorages
serves the boating public. Section II examines the need for temporary
'harbors of refuge' in the area, what...
To measure organismal coherence in a pelagic ecosystem, we used moored sensors to describe the vertical dynamics of each step in the food chain in shelf waters off the west shore of Oahu, Hawaii. Horizontally extensive, intense aggregations of phytoplankton, zooplankton, and micronekton exhibited strong diel patterns in abundance and...
The importance of spatial pattern in ecosystems has long been recognized. However, incorporating patchiness into our understanding of forces regulating ecosystems has proven challenging. We used a combination of continuously sampling moored sensors complemented by shipboard sampling to measure the temporal variation, abundance, and vertical distribution of four trophic levels...
We present a new estimate for the crustal phosphorous sink that results from reactions among seawater, basalt, and sediment blanketing low temperature mid-ocean ridge flank hydrothermal systems. New estimates for global hydrothermal power output, sediment thickness, and the dissolved phosphate concentrations in basement formation fluids indicate that fluid flow through...
We examined the characteristics of biological patches at four different locations to assess the relationship of patch vertical scale, amplitude, and persistence. In contrast to patches of larger animals, we found that the majority of coherent aggregations of plankton at each site were vertically compressed, with most smaller than 5m...
Isotopic analyses of dissolved molybdenum are presented for sediment pore waters from a reducing
sedimentary basin and for fluids from a low-temperature ridge flank hydrothermal system. δ⁹⁸/⁹⁵Mo in
these fluids range from 0.8 to 3.5%₀ (relative to a laboratory standard), demonstrating that marine
sedimentary reactions significantly fractionate Mo isotopes. Within...
The near-term progression of ocean acidification (OA) is projected to bring about sharp changes in the chemistry of coastal upwelling ecosystems. The distribution of OA exposure across these early-impact systems, however, is highly uncertain and limits our understanding of whether and how spatial management actions can be deployed to ameliorate...