AES manual and case study - Hiroshima University · AES users manual and Case study ; Atmosphere (Typhoon) – Ocean Interaction 第43回COE研究会(The 43rdCOE Research Seminar)

AES users manual and Case study ;Atmosphere (Typhoon) – Ocean

Interaction

第43回COE研究会 (The 43rd COE Research Seminar)

2007.12.21Han Soo LEE

Research Centre for Environment Simulator Project,IDEC, Hiroshima University

Homepage for Research Project and Yamashita Lab.http://home.hiroshima-u.ac.jp/~takao52/index.htm

Research Centre for Environment Simulator Project, IDEC

Aisan Environment Simulator (AES)Research Centre for Environment Simulator Project, IDEC

AES is a coupled system of computer simulations for Meteorology, Physical Oceanography, Land Surface Vegetation, Hydrology, Estuary and Coastal Dynamics and Urban Environment, which is mainly made use of natural environmental assessment against human activities. (Yamashita et al., 2007)

AES : Water and heat circulation in environment in regional scale

Behaviour of Tracer gases and sediments in Environment

NCEP FNL from USA,ECMWF ERA40 from EU,JMA GPV from Japan,etc.

Data assimilation ;WINDAS,QUICKSAT,etc

Component models and their interactions

CouplerCoupler

Atmosphere(MM5)

Wind Waves(WW3, SWAN)

Ocean(MITgcm,

POM)

Estuary & Coast(ECOMSED,

CADMUS-SURF)

Land Surface & Dynamic Vegetation(SOLVEG)

Hydrology(HSPF)

Atmospheric and Terrestrial Circulation

InteractionData transfer

Atmospheric and Oceanic Circulation

Coastal circulation


Atm: SLP, precipitation,evaporation,

heat flux, radiation, Wind-induced surface

stress

Ocn: SST

Wave: shear stress by wave

breakingOcn: SWL,

current

Atm: surface wind,

Wave: Surface

roughness

Atm: air pressure, radiation, precipitation, wind, air temp.,

humidityLand Surf.: surface temp., albeido, momentum-, heat-,

and vapo-flux

Land Surf.: soil water, surface runoff, precipitation &

evaporation in river River: soil water

variation, surface water variation,

Ocean & Atm. States :Surge, waves, currents, heat & vapor transfer,

Regional ocean circulation,Air circulation & structure

(Tropical Cyclone)

Land Surf. & River states: Rainfall, Runoff,

River flow

Coastal Problems : coastal circulation, sediment transport, wave overtopping, inundation.

1. Self-made coupler based on Massage

Passing Interface

2. Model coupling library (OASIS3)

based on MPI

Interaction in wind-wave-current;(in storm surge simulation)

Atmosphere(Wind,

Pressure)

Wind waves(White-cap,

Wave breaking)

Ocean(Surge, Current)

Tsurface

Tbr(whitecap)+Tbr(depth-induced)

u,v,η

Z 0Twav

e+

Tt

⎟⎟⎠

⎞⎜⎜⎝

⎛⎟⎠⎞

⎜⎝⎛∂∂

+⎟⎠⎞

⎜⎝⎛∂∂

=2

02

02)(z

Uz

Uz aat νκρτ

θθ

ρτ ∫ ∫ −− = dfdfCfS

g capwhitedscapwhitebr )(),()(

)(

)(

)(

induceddepthbr

capwhitebr

surface

total

−

−

+

+

+=

γτ

βτ

ατ

τ

1010 UUCDasurface ρτ =∫= ωωρτ dFgc wwave )(1 &

Yamashita et al (2000)

(Stress by white-capping)

Jannsen (1982)

a

C cu

ugz

⎟⎠⎞

⎜⎝⎛= *2

*

0 α


θθ

ρτ ∫ ∫ −− = dfdfCfS

g induceddepthdsinduceddepthbr )(),()(

)(

EOS, 2005

Interaction in Atmosphere-Land Surface-Hydrology


Coupler

Atmosphere (MM5)

Land Surface

(SOLVEG)

Hydrology (HSPF)

Simple ADV.-DIFF.

model

InteractionData transfer

Atm: Rainfall, Wind, air humidity,

Temperature, radiation

Atm: Wind field, Turbulent Kinetic Energy, length scale

Land Surf: interception, ET losses

Land surf.: CO2 fluxAdv-Diff: CO2 concentration

Atm: Radiation, Rain, Wind, Temp. Humidity, PressureLand Surf.: Skin Temperature, Albedo, Momentum flux, Heat flux, Moisture Flux

High Performance Linux Cluster (HPLC) system for AES

• 1. RCDE system


Hardware :14nodes (1Head + 13 Computes)1node : P4 2GHz, 2Gb RAM, and so on

Software (OS & Compiler) :CentOS4.3, GNU Fortran, Intel Fortran 9.0,GNU C (gcc), Intel C/C++ compiler,MPICH-1.2.7, LAMMPI, OpenMPI,

NetCDF-3.6.2, GMT4.2,GrADS 1.9b4, FERRET6.0,etc.

Important Factor in cluster system :Network interface (10/100Mbps)

Head node(OS:CentOS)

Compute nodes

2. HSC.YIDEC system


Hardware :9nodes (1Head + 8 Computes)1node : Xeon 3.4GHz 2CPUs, 4Gb RAM, and so on

Software (OS & Compiler) :CentOS4.2, GNU Fortran, Intel Fortran 9.0,GNU C (gcc), Intel C/C++ compiler,MPICH-1.2.7, LAMMPI,

NetCDF-3.6.1, GMT4.1,GrADS 1.9b4, FERRET6.0,etc.

Important Factor in cluster system :Network interface (1Gbps)

How much ?

Direct Access Storage (1.5TB) : 500,000 Yen

Quad-core 2CPUs, 16Gb RAM

(1,000,000x2=2,000,000 Yen)

Xeon 3.4Ghz 2CPUs, 4Gb RAM

(300,000x9=3,000,000 Yen)

Other peripherals (Rack, Monitor, ethernet

Switch, KVM switch,Power unit,

etc) :1,000,000Yen

Approximately 6,500,000Yen

+

+

+

||

AES manualResearch Centre for Environment Simulator Project, IDEC

Any idea on the manual?We want your feedback!

Case Study of AES• Study of Typhoon-Ocean Interaction by

atmosphere-ocean coupled model• Current situation of typhoon and storm

surge simulations– Now- and Fore-cast of Typhoon track and

intensity• Atm-ocn coupled model (w/ Baroclinic ocean state)• Neglect the wind wave effects

– Storm surge simulation • (Atm)-wave-ocn coupled model (w/ wave-current

interaction• Barotropic ocean state

To improve the typhoon and storm surge simulations by

Atmosphere(MM5)

Wind waves(SWAN)

OceanCirculation(MITgcm)

Coupler(Regridding/

Interpolation)

U10,Surface pressure,

Heat flux,Precipitation

Surfaceroughness,

SST

U10,

Wate

r lev

el,

Curre

ntSu

rface

roug

hnes

s,

Radia

tion s

tress

,

Whit

ecap

ping

stres

s

Whitecapping stress,

Surface pressure,

Heat flux,

Precipitation,

Radiation stress,

U10Water level,

Current,

SST


; atm-wave-ocn coupled model w/ wind wave effects and baroclinc ocean states

Typhoon-Ocean Interaction

• Ocean response• Typhoon response• Effects of Kuroshio Warm Currents (KWC)

on typhoon intensity


Generation and development of

typhoon (SST > 26~27C)

Increment of evaporation rate due to

increase of wind stress

Increase of latent heat flux

driving the circulation of

typhoon

Increase of turbulent mixing by strong wind stress and local

convection

SST cooling by strong turbulent mixing

Decrease of typhoon

intensity by the SST cooling

Positive feedback Negative feedback

MM5Research Centre for Environment Simulator Project, IDEC

3D non-hydrostatic meso-scale atmospheric circulation model

by Penn. State Univ. and National Center for Atmospheric Research

Pre-processing

Post-processing;Data analysis and visualization

MM5MM5

MITgcm• General Circulation Model developed at MIT• Both atmospheric and oceanic circulation• Non-hydrostatic capability• Horizontal orthogonal curvilinear coordinate• Finite volume method for representing topography• Wide range physical parameterization• Versatile computing using flexible domain decomposition

Non-hydrostatic

Hydrostatic


– Typhoon ETAU (0310)• Three applications from 00:00Z 5th Aug. to 18:00Z

8th Aug. in 2003 1) atmosphere-alone (control) run, 2) ocean-alone (control) run and 3) atmosphere-ocean (coupled) run.


Baroclinic Ocean State :Initial condition of Temperature and Salinity profiles JCOPE regional model data

Surface heat flux,Surface wind momentum flux,

Atmospheric pressure

Ocean(MITgcm)

Typhoon(MM5)

SSTDecrease

of SSTDecrease of

heat flux, precipitation

Coupler (OASIS3)

Numerical experiments

Typhoon-Ocean interaction

- T0310 (ETAU)• Experiments setup of ocean model

– 90-hrs simulations from 00:00UTC 5th Aug. to 18:00UTC 8th Aug. 2003

– GEBCO 1-min bathymetry– the largest domain of atmosphere model from 125E to 144E and

from 15N to 36N – 1/6ﾟ horizontal resolution – 26 vertical layers ( < 1.4) – vertical mixing processes

by the non-local K-profile parameterization – no-slip bottom and

free surface boundary condition • Simulation results

1) atmosphere-alone (non-coupled) run, 2) ocean-alone (non-coupled) run and

– Initial and Boundary condition : JCOPE data (T, S and current)

3) atmosphere-ocean (coupled) run

( 1) ( )dz k dz k+


(a)12 h (b)36 h

(c)60 h (d)84 h

Ocean response

Mixed-layer Currents

-Coupled run

Counterclockwise circulation in the front due to wind stress

Clockwise circulation in the wake due to inertial flow


(a)12 h (b)36 h

(c)60 h (d)84 h

Ocean response

Thermocline-layer Currents

-Coupled run

Weak infulence in thermocline currents due to ambient currents


A-A’

B-B’

36h

A A’

B

B’

Coupled Non-Coupled

Research Centre for Environment Simulator Project, IDECOcean response

Sea surface temperature – Coupled run Ocean response12h 36h

60h 84h


Ocean response

Tropical Rainfall Measuring Mission(TRMM) satellite

Microwave Imager (radiometer)

Images(TMI 3-days mean SST)

5 Aug. 6 Aug.

7 Aug. 8 Aug.No data by cloud cover


SST anomaly after 90hrs

8 August

Ocean response

Boundary condition

Initial condition


Latent heat flux anomaly Sensible heat flux anomaly Typhoon response

36h

Track of T0310 and Computational domain


Net heat flux :Latent + Sensible heat flux

Non-Coupled run : SST constant Coupled run : Variable SST

Typhoon response


Non-coupled run : SST constant Coupled run : Variable SST

(a) (b) (c)

(a) (b)

Precipitation

(c)Equivalent Pontetial

Temperature

36h

Research Centre for Environment Simulator Project, IDEC Typhoon response

Effects of Kuroshio Warm Current

on typhoon intensity

940 hPa

950 hPa

960 hPa

970 hPa

980 hPa

990 hPa

0 h 10 h 20 h 30 h 40 h 50 h 60 h 70 h 80 h 90 h

Time

Typhoon ETAU

Min

imum

surf

ace p

ressure

Moved onto KuroshioMoved onto Kuroshio

LandfallLandfall

Observed pressureObserved pressureCoupled runCoupled run

84h

8 Aug.27.5 29.75

Simulation

TMI satellite observation


Concluding Remarks• AES was established and now on its first

stage– AES manual and HPLC system are available

for our research• Case Studies of AES

– Typhoon-ocean interaction– Dam-lake hydrodynamics– Storm surge due to typhoon, hurricane and

cyclone– Rainfall in rainy season and Runoff and

Sediment transport from watershed– Atmospheric and terrestrial circulation in

Kapuas River basin– and so on …


Documents

AES manual and case study - Hiroshima University · AES users manual and Case study ; Atmosphere (Typhoon) – Ocean Interaction 第43回COE研究会(The 43rdCOE Research Seminar)