Περίληψη:
Air-sea interface processes are highly associated with the evolution and
intensity of marine-developed storms. Specifically, in the Mediterranean
Sea, the air-ocean temperature deviations have a profound role during
the several stages of Mediterranean cyclonic events. Subsequently, this
enhances the need for better knowledge and representation of the sea
surface temperature (SST). In this work, an analysis of the impact and
uncertainty of the SST from different well-known datasets on the
life-cycle of Mediterranean cyclones is attempted. Daily SST from the
Real Time Global SST (RTG_SST) and hourly SST fields from the
Operational SST and Sea Ice Ocean Analysis (OSTIA) and the NEMO ocean
circulation model are implemented in the RAMS/ICLAMS-WAM coupled
modeling system. For the needs of the study, the Mediterranean cyclones
Trixi, Numa, and Zorbas were selected. Numerical experiments covered all
stages of their life-cycles (five to seven days). Model results have
been analyzed in terms of storm tracks and intensities, cyclonic
structural characteristics, and derived heat fluxes. Remote sensing data
from the Integrated Multi-satellitE Retrievals (IMERG) for Global
Precipitation Measurements (GPM), Blended Sea Winds, and JASON altimetry
missions were employed for a qualitative and quantitative comparison of
modeled results in precipitation, maximum surface wind speed, and wave
height. Spatiotemporal deviations in the SST forcing rather than
significant differences in the maximum/minimum SST values, seem to
mainly contribute to the differences between the model results.
Considerable deviations emerged in the resulting heat fluxes, while the
most important differences were found in precipitation exhibiting
spatial and intensity variations reaching 100 mm. The employment of
widely used products is shown to result in different outcomes and this
point should be taken into consideration in forecasting and early
warning systems.
Συγγραφείς:
Stathopoulos, Christos
Patlakas, Platon
Tsalis, Christos and
Kallos, George
