منابع مشابه
Assessment of excess nitrate development in the subtropical North Atlantic
Geochemical estimates of N2 fixation in the North Atlantic often serve as a foundation for estimating global marine diazotrophy. Yet despite being well-studied, estimations of nitrogen fixation rates in this basin vary widely. Here we investigate the variability in published estimates of excess nitrogen accumulation rates in the main thermocline of the subtropical North Atlantic, testing the as...
متن کاملSalinity change in the subtropical Atlantic: Secular increase and teleconnections to the North Atlantic Oscillation
[1] Recent studies comparing shipboard data between the 1950’s and the 1990’s have shown significant, heterogeneous adjustments of the temperature-salinity structure of the N. Atlantic Ocean. Here, we present proxy records of temperature and salinity from aragonite sclerosponge skeletons, extending existing records of the Salinity Maximum Waters (SMW) of the N. Atlantic back to 1890. These prox...
متن کاملThe Relation between Decadal Variability of Subtropical Mode Water and the North Atlantic Oscillation*
The Bermuda station ‘‘S’’ time series has been used to define the variability of subtropical mode water (STMW) from 1954 to 1995. This record, which shows decadal variability at a nominal period of about 12–14 yr, has been used as a baseline for seeking correlation with large-scale atmospheric forcing and with decadal north–south excursions of the Gulf Stream position defined by the subsurface ...
متن کاملDecadal Variabilities of the Upper Layers of the Subtropical North Atlantic: An Ocean Model Study
Numerical simulations of the Atlantic Ocean during the period 1950 to 1989, using a sigma coordinate, free surface numerical model, show long-term variabilities in the upper ocean subtropical gyre similar to those obtained from observations. The simulations show how westward propagating planetary waves, originated in the eastern North Atlantic, affect interdecadal variabilities of ocean propert...
متن کاملObservations of the Boundary Current System at 26.58N in the Subtropical North Atlantic Ocean*
Five current meter moorings and four horizontal electric field records spanning June 1990–February 1992 are used to describe the mean structure and variability of the vertically averaged velocity field and volume transport extending 425 km east of Abaco, The Bahamas, at 26.58N. Examination of zonal and meridional velocity sections shows that, while meandering may explain part of the variability...
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ژورنال
عنوان ژورنال: Journal of Climate
سال: 1997
ISSN: 0894-8755,1520-0442
DOI: 10.1175/1520-0442(1997)010<0728:tnasa>2.0.co;2