Sentences with phrase «ocean productivity from»

This mega-shift in ocean productivity from south to north over the next three to four decades will leave those most reliant on fish for both food and income high and dry.

Not exact matches

This global biological recordbased on daily observations of ocean algae and land plants from NASAs Sea - viewing Wide Field - of - View Sensor (SeaWiFS) missionwill enable scientists to study the fate of atmospheric carbon, terrestrial plant productivity and the health of the oceans food web.

The researchers looked specifically at the average fishing revenue in 106 Alaskan communities for 10 years before and after 1989, a year when the North Pacific Ocean experienced a significant shift in productivity and abrupt changes in the composition of marine food webs, while at the same time the global price for salmon dropped because of competition from farm - raised fish.

«NASA has access to large - scale oceanographic data sets ranging from primary productivity to ocean temperature, currents and wind,» Moore said.

The team — from Southampton, the University of Cape Town and the Norwegian Institute for Air Research — conducted three research voyages in 2010 investigating ocean productivity in the area affected by ash from Eyjafjallajökull.

Climate change is thus inseparable from ocean change, and our ability to understand these changes relies heavily on our understanding of ocean ecosystems and, more specifically, the role of iron in regulating ocean productivity and hence the global carbon cycle and climate.

But we wanted to observe the natural development of the plankton ecosystem from the first productivity in late winter until summer, closely monitor the succession of the plankton communities and follow how effects of ocean acidification are transmitted from one generation to the next,» Riebesell explains.

The shift from a multiyear to seasonal ice cover has significant implications for the heat and mass budget of the ice and for primary productivity in the upper ocean.

Fifth, warming of the oceans may have serious impacts on fisheries productivity, and ocean acidification from the carbon dioxide humanity is pouring into the atmosphere may have even more serious consequences for the harvest from the sea.

By combination of this sea ice proxy IP25 with (biomarker) proxies for open - water phytoplankton productivity such as brassicasterol, dinosterol or a specific tri-unsaturated HBI (HBI - III) 37,38,39,40,41, a more precise (semi-quantitative) reconstruction of present and past Arctic Ocean sea ice conditions from marine sediments are now available (Supplementary Fig. 1; see Metho 6ds for some more details).

This would then lead to large, unpredictable changes in ocean ecosystem structure and productivity, on top of other large unpredictable changes to be expected from ocean acidification, the other great oceanic consequence of high atmospheric carbon dioxide concentrations from fossil fuel burning.

Phytoplankton in the ocean's upper layer (that is, the populations observed from space) rely on vertical nutrient transport to sustain productivity, so intensified stratification during a rising MEI period (Fig. 2b) is accompanied closely by decreasing NPP (Fig. 2b)(r2 5 0.73, P, 0.005)

As far as I can see, one of the things that others have been trying to get at in this thread is that, owing to chronic reductions in crop yield, acute crises from droughts or flooding, and (in the case of ocean acidification) reduced productivity of ocean biomes exploited for food sources, starvation is a potential (if not yet 100 % certain) climate impact, especially in tropical / subtropical regions.

Ocean primary productivity depends on sunlight and nutrients supplied from deep waters (Sarmiento et al., 2004a).