in Hainan Island Lei Zhu Paul Markowski Zhiyong Meng and Fuqing Zhang Research purpose T ry to understand the climatology of diurnal precipitation cycle in Hainan Island ID: 627881
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Slide1
Diurnal cycle of precipitation in Hainan Island
Lei Zhu
Paul
Markowski
,
Zhiyong
Meng
and
Fuqing
ZhangSlide2
Research purpose
T
ry to understand the climatology
of
diurnal
precipitation cycle in Hainan Island
Through model simulation to get the detailed mechanism
of diurnal precipitation cycle
in Hainan Island.Slide3
Data
10-year CMORPH (8km + 30min
resolution
)
60-year gauge precipitation (19 stations in the island)
5-year surface wind (19 stations)
10-year ERA-Interim reanalysis as the initial and boundary conditionSlide4
CMORPH & perturbation wind on station points
January
LST = UTC +8hSlide5
CMORPH & pertu
rbation wind
on station points
May
LST = UTC +8hSlide6
CMORPH & pertu
rbation wind on station points
October
LST = UTC +8hSlide7
Average diurnal cycle in precipitationSlide8
Station gauge precipitationSlide9
Diurnal Precipitation contributes to the total precipitation Slide10
WRF simulation
CNTL
n
oterSlide11
WRF simulation
p
erturbation wind (u, v, w)
CNTL
n
oterSlide12
WRF simulation
Idealized islandSlide13
WRF simulation
p
erturbation u, w*10Slide14
Conclusion
The diurnal cycle of precipitation exists in the island almost throughout the year, while the warm-season (May-August) is the most distinct period.
The diurnal precipitation does huge contribution to total precipitation in the island especially in the warm-season.
The land-sea breeze is the fundamental factor for the diurnal cycle of precipitation.
The high-resolution convection-permitting simulations (whether the real simulation or the idealized simulation) show very good agreement with the diurnal precipitation cycle as well as the evolution of perturbation wind (
land-sea breeze). Slide15
JanSlide16
MaySlide17
Oct