TITLE:
The Role Played by Blocking System over North America on the Development of Hurricane Ophelia over North Atlantic Ocean
AUTHORS:
Yehia Hafez, Abdulhaleem Labban
KEYWORDS:
Blocking System, North America, North Atlantic Ocean, Hurricane Ophelia
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.6 No.12,
December
4,
2018
ABSTRACT: As one of very rare and unusual tracks of hurricane Ophelia, it exists over the
North Atlantic Ocean during the period of 9-17 October 2017. The present
work investigates the role played by blocking system over North America on
the development of hurricane Ophelia. The 6-hour daily data of NCEP/NCAR
reanalysis composites for the meteorological parameters are used. The meteorological
elements used in the present work are (geopotential height and
meridional wind components at 500-hpa level). The domain of this data is the
northern hemisphere domain. Moreover, the 6-hour data on the surface
pressure at the center of hurricane Ophelia and its maximum wind through
the period (9-17 October) have been used. The time series, anomaly and correlation
coefficient methods have been used to analyze the meteorological
data. The results revealed that the persistence of blocking high system over
the North America during the period of 9-17 October 2017 controls the development,
strength, and the track of hurricane Ophelia over the North Atlantic
Ocean.