نتایج جستجو برای: upwelling
تعداد نتایج: 4540 فیلتر نتایج به سال:
Radiocarbon (14C) content of surface waters inferred from a coral record from the Galapagos Islands increased abruptly during the upwelling season (July through September) after the El Nino event of 1976. Sea-surface temperatures (SSTs) associated with the upwelling season also shifted after 1976. The synchroneity of the shift in both 14C and SST implies that the vertical thermal structure of t...
Recent geochemical studies of uranium-thorium series disequilibrium in rocks from subduction zones require magmas to be transported through the mantle from just above the subducting slab to the surface in as little as approximately 30,000 years. We present a series of laboratory experiments that investigate the characteristic time scales and flow patterns of the diapiric upwelling model of subd...
Citation: Taucher J, Bach LT, Boxhammer T, Nauendorf A, The Gran Canaria KOSMOS Consortium, Achterberg EP, Algueró-Muñiz M, Arístegui J, Czerny J, Esposito M, Guan W, Haunost M, Horn HG, Ludwig A, Meyer J, Spisla C, Sswat M, Stange P and Riebesell U (2017) Influence of Ocean Acidification and Deep Water Upwelling on Oligotrophic Plankton Communities in the Subtropical North Atlantic: Insights f...
Recent observations from the Dynamics Explorer 1 (DE 1) spacecraft have shown that the dayside auroral zone is an important source of very low-energy superthermal O+ ions for the polar magnetosphere. When observed at 2000to 5000-km altitude, the core of the O + distribution exhibits transverse heating to energies on the order of 10 eV, significant upward heat flux, and subsonic upward flow at s...
Introduction Conclusions References
An extremely unusual level of coastal upwelling in the spring and summer of 1999 over much of the California Current system (CCS) is described, based on direct and indrect observations. Wind and ocean anomalies in 1999, a period characterized by an equatorial La Niiia, are compared to climate trends for the previous several years, and specifically contrasted with the extremes associated with th...
Daily changes in the concentrations of carbon and nitrogen species were monitored during the course of a Lagrangian drifter experiment in a recurrent upwelling filament south of Cape Finisterre (NW Iberian Upwelling System). A drifting buoy released at the southern edge of the upwelling centre generated by the Cape moved 60km southwestwards from 3 to 7 August 1998. Organic matter in the 50m dee...
Global increases in temperature are altering land-sea gradients. Bakun (1990) hypothesized that changes within these gradients will directly affect atmospheric pressure cells associated with the development of winds and consequently impact upwelling patterns ecologically important Eastern Boundary Upwelling Systems (EBUS). In this study we used daily time series NOAA Optimally Interpolated sea ...
Abstract Spatial and temporal variations of nutrient-rich upwelled water across the major eastern boundary upwelling systems are primarily controlled by surface wind with different, sometimes contrasting, impacts on coastal driven alongshore offshore local wind-stress-curl. Here, concurrently measured wind-fields, satellite-derived Chlorophyll-a concentration along a state-of-the-art ocean mode...
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