Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky
Erscheinungsjahr:
2020
Medientyp:
Text
Schlagworte:
barrier layer
tropical Atlantic Ocean
Amazon river runoff
freshwater
North Brazil Current rings
ITCZ
550: Geowissenschaften
ddc:550:
Beschreibung:
In this thesis the freshwater changes and the underlying processes in the northern tropical and subtropical Atlantic Ocean are investigated by analyzing daily outputs of high-resolution eddy-resolving numerical simulations of the Atlantic Ocean using MITgcm. The impacts of small-scale ocean processes like eddies and fronts embedded in the regional circulation, on the evolution of barrier layers i.e. stratification in the upper-ocean are investigated. The growth and decay mechanisms of the barrier layers in the tropical Atlantic Ocean are identified and quantified. Moreover, with numerical sensitivity experiments, I explore the impacts of extreme and realistic changes in the Amazon river discharge on the northern tropical Atlantic ocean circulation and upper-ocean barrier layers.