—Based on the Coupled Model Inter-comparison
Project (CMIP5) coordinated experiments simulated by the IAP
Flexible Global Ocean-Atmosphere-Land System Model
(FGOALS), the properties of the East Asian Westerly Jet
(EAWJ) during the Meiyu season have been investigated with
the using statistical analysis, kinetic and thermodynamic
methods. FGOALS can well capture the land and sea patterns
of the EAWJ during the Meiyu period, which is that patterns of
the EAWJ mainly core divided by the borderline of 120°E.
Comparison with the NCEP/NCAR reanalysis, the EAWJ
simulated by the FGOALS model during the Meiyu period
exists some biases, which are caused due to weaken of the
simulated meridional temperature gradient at the middle and
upper troposphere and decrease of the Tibetan Plateau heating,
then lead to the corresponding south Asian high weaken. The
position and intensity of the EAWJ in the early summer is
closely associated with the spatial distribution and intensity of
heavy precipitation in the middle and lower reaches of the
Yangtze River. The position of the simulated EAWJ is obviously
more northward and westward, and its intensity is greatly
weaker, insulted that the Meiyu precipitation amount becomes
less, especially in the lower reach of the Yangtze River.
—East Asian westerly jet, South Asian high,
meridional temperature gradient, coupling of the upper and
lower level jets.
Yin Du is with the KLME/ILCEC/CIC-FEMD/CDRC, NUIST, Nanjing,
China (e-mail: duyinxie@ 163.com).
Zhiqing Xie is with the Jiangsu Climate Center, Jiangsu Meteorological
Administration, Nanjing, China (e-mail: firstname.lastname@example.org).
Cite: Yin Du and Zhiqing Xie, "Analysis of the FGOALS Simulation on East Asian Westerly Jet in CMIP5 during the Meiyu Season," International Journal of Environmental Science and Development vol. 8, no. 4, pp. 299-304, 2017.