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ANCST Workshop, KL, 15-16 Nov 2018
Dr. Sri RaghavanTropical Marine Science Institute
(TMSI)Dr.Jina Hur, Mr.Liu Jiandong
Dr. Nguyen Ngoc Son and Dr.Liong Shie-Yui
Future Climate Projections for Southeast Asia: What does high
resolution modelling tell us?
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TMSI’s Climate Downscaling work
WRF30 km
ECHAM A1B
MIROC A1B
CCSM A1FI
CCSM A2
ERA40 & ERA-Interimreanalyses
ECHAM A2
CCSM A1B
MIROC A2
ACCESS1.0
MPI-ECHAM6
ERA-Interimreanalyses
HaDGEM-A0
MIROC5
CCSM4
WRF20 km
CMIP3 CMIP5
Scenarios: RCP 4.5 and 8.5WRF region: Southeast Asia
90E – 130E15S to 28N
MPI ESM
MIROC5
HadGEM-A0
CCSM4
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ANNUALMean Rainfall1986-2005(mm/day)
CHIRPS
WRF/ENSWRF/ERAI
ENS – ensembleof GCMS
MPI ECHAM6CSIRO ACCESSNIES MIROC5
20 kmsimulations
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CHIRPS
WRF/ERAI WRF/ENS
DJFMean Rainfall1986-2005(mm/day)
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CHIRPS
WRF/ERAI WRF/ENS
JJAMean Rainfall1986-2005(mm/day)
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Gauge/Observations Coverage
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ANNUALMean Temperature1986-2005(°C)
APHRODITE
WRF/ERAI WRF/ENS
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DJFNortheast MonsoonSurface Winds (m/s)1986-2005
ERAI
WRF/ERAI WRF/GCMs
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JJASouthwest MonsoonSurface Winds (m/s)1986-2005
ERAI
WRF/ERAI WRF/GCMs
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Annual Cycle of Precipitation
JAKARTA
VIENTIANE HANOI
MANILA
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WRF Multi Model Ensemble2020-2040 vs 1986-2005: RCP 4.5
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WRF Multi Model Ensemble2020-2040 vs 1986-2005: RCP 4.5
ANNUALchange
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RCP 4.5
RCP 8.5
2016-2040 2071-2100
2016-2040 2071-2100
RCP 4.5
RCP 8.5
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Summary• WRF model is able to reproduce the regional climate
reasonably well.• Multi-Model ensemble show some uncertainties, yet
capture the mean state of the climate of the region• That SEAsia will be affected largely by temperature
increases is certain.• Rainfall trends are mixed and still uncertain.
Seasonal (monsoonal changes) are neverthelesssignificant
• Further downscaling is progress @ 10 km and 5 km.With additional fine tuning and physicsimprovements, downscaling of selected GCMs willbe performed.