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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Effects of tropical cyclones on ocean heat transport in a high-resolution coupled general circulation model
Journal of Climate, Volume 24, No. 16, Year 2011
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Description
In this paper the interplay between tropical cyclones (TCs) and the Northern Hemispheric ocean heat transport (OHT) is investigated. In particular, results froma numerical simulation of the twentieth-century and twenty-first-century climates, following the Intergovernmental Panel on Climate Change (IPCC) twentiethcentury run (20C3M) and A1B scenario protocols, respectively, have been analyzed. The numerical simulations have been performed using a state-of-the-art global atmosphere-ocean-sea ice coupled general circulation model (CGCM) with relatively high-resolution (T159) in the atmosphere. The CGCM skill in reproducing a realisticTCclimatology has been assessed by comparing themodel results fromthe simulation of the twentieth century with available observations. The model simulates tropical cyclone-like vortices with many features similar to the observed TCs. Specifically, the simulatedTCs exhibit realistic structure, geographical distribution, and interannual variability, indicating that the model is able to capture the basic mechanisms linking the TC activitywith the large-scale circulation. The cooling of the surface ocean observed in correspondence of the TCs is well simulated by themodel.TCactivity is shown to significantly increase the polewardOHT out of the tropics and decrease the polewardOHT fromthe deep tropics on short time scales. This effect, investigated by looking at the 100 most intense Northern Hemisphere TCs, is strongly correlated with the TC-induced momentum flux at the ocean surface, where the winds associated with the TCs significantly weaken (strengthen) the trade winds in the 5°-18°N(18°-30°N) latitude belt.However, the induced perturbation does not impact the yearly averaged OHT. The frequency and intensity of the TCs appear to be substantially stationary through the entire 1950-2069 simulated period, as does the effect of the TCs on the OHT. © 2011 American Meteorological Society.
Authors & Co-Authors
Scoccimarro, E.
Italy, Rome
Istituto Nazionale Di Geofisica e Vulcanologia, Rome
Gualdi, Silvio
Italy, Rome
Istituto Nazionale Di Geofisica e Vulcanologia, Rome
Italy, Lecce
Fondazione Centro Euro-mediterraneo Sui Cambiamenti Climatici
Bellucci, Alessio
Italy, Lecce
Fondazione Centro Euro-mediterraneo Sui Cambiamenti Climatici
Sanna, Antonella
Italy, Lecce
Fondazione Centro Euro-mediterraneo Sui Cambiamenti Climatici
Fogli, Pier Giuseppe
Italy, Lecce
Fondazione Centro Euro-mediterraneo Sui Cambiamenti Climatici
Vichi, Marcello
Italy, Rome
Istituto Nazionale Di Geofisica e Vulcanologia, Rome
Italy, Lecce
Fondazione Centro Euro-mediterraneo Sui Cambiamenti Climatici
Oddo, Paolo
Italy, Rome
Istituto Nazionale Di Geofisica e Vulcanologia, Rome
Navarra, Antonio
Italy, Rome
Istituto Nazionale Di Geofisica e Vulcanologia, Rome
Italy, Lecce
Fondazione Centro Euro-mediterraneo Sui Cambiamenti Climatici
Statistics
Citations: 269
Authors: 8
Affiliations: 3
Identifiers
Doi:
10.1175/2011JCLI4104.1
ISSN:
08948755
Research Areas
Environmental