Overview of the Center for Computational Sciences
Summary of Activities for 2004-2007

Division of Global Environment andBiological Sciences
Global Environmental Science Group
Hiroshi L. Tanaka(Group Leader)Group Member••••

Hiroshi L. Tanaka, Prof.
Hiroyuki Kusaka, Asst. Prof.
Fujio Kimura, Adjunct Prof.
Akio Kitoh, Affiliated Prof.

CCS Staff (Since 2004)
CCS Staff (Since 2006)
Geoenvironmental Sci.
MRI/JMA

Graduate Student:
DC: (3) Matsuda, Ishizaki, Terasaki
MC:(10) Yokoyama, Io, Fujita, Takemoto, Suzuki-M, Suzuki-I.
Kondo, Kato, Yamazaki, Seta,TanakaKusaka

KimuraKitoh

Research activity (H.L. Tanaka)
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General circulation of the atmosphere
Global warming and Arctic Oscillation
Global warming and tropical circulation
Global spectral energetics
Blocking and abnormal weather
Dynamics of baroclinic waves
Research activity (H. Kusaka)

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Regional modeling using WRF3.0
Urban climate modeling
Meso-scale precipitation system
GPS and data assimilation
Surface heat budget and radiation
Real-time prediction system

General Circulation Study•••

Data analysis
Dynamical theories
Numerical ModelingGlobal warming and Arctic Oscilation

Arctic Oscillation
Singular eigenmode theory
EigenmodeAO (DJF)
EOF-1

EVP-1

Predictions of the AO Index

Ensemble Prediction by Stochastic Physics
PC Cluster Experiment

Barotropic S-ModelData Assimilation Test
By Kalman Filter andEnsemble Kalman Filter

Barotropic S-Modelat University of Taukuba

EnKF (m=1000), 12.6%

EKF (linear model), 8.8%

Collaborations• JMA: Thorpex Ensemble prediction technique• FRCGC: Arctic Oscillation studies• IARC: Global change connection to the Arctic• MRI: Data assimilation and Kalman filter• CCSR: NICAM by PACS-CS• NIPR: Arctic process studies• Weather News: Prediction of AO• Pukyong National University：Ice dynamics

Realtime weather
prediction sysytem
１．WRF-V2.2 withurban model
2．Analysis andassimilation
3．Initial data by
theJMA/GPV data

JMA/GPVWPSWRFWRF simulation of Typhoon(900Z-3-Sep-2007)

WRF with PACS-CS

Weather map by JMA

Simulation of meso-scale heavy rainwith WRF６ｋｍ

Extreme record hot in Aug. 2007

Surface air temperature(WRF model simulation)

AMeDAS Observation

Urban climate and heat islandTokyoGlobal mean

気象庁HPより

Urban effects onlocal cloudsCollaborations with other Divisions• Division of Computational Informatics=> JMA/GPV Data archive project• Division of High Performance Computing Systems=> NICAM model prediction with PACS-CS• Division of Particle Physics and Astrophysics=> Seminars on fluid dynamics and radiation
Progress of Supercomputer

GFLOPS

1000 =1PFLOPS

610

BlueGene/L

105

100

Earth Simulator

104

10
CP-PACS

1000100

QCD-PAX

10PACS-CS

1PFLOPS=1000TFLOPS

10.1

1 TFLOPS=1000GFLOPS

0.01

10.001
CRAY-10.10.0001
1975 1980 1985 1990 1995 2000 2005 2010year

GPV/JMA
Top Page

Collaboration with Computational Informatics

Product releaseｄ by CCS

Realtime animations

Collaboration with HPC Systems

NICAM

Glevel-0
Glevel-5: Δx=250km
Glevel-6: Δx=120km
Glevel-7: Δx= 60km
Glevel-8: Δx= 28km
Glevel-9: Δx= 14km
Glevel-10:Δx= 7km
Glevel-11:Δx=3.5km

by PACS-CS

Original Icosahedron
Satoh et al. CCSR

Glevel-1

Glevel-3

Glevel-5

NICAM model run with PACS-CS
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Run-# g-levelr-level
node #Run-01 250-km 0010-region 001-nodeRun-02 250-km 0010-region 005-nodeRun-03 250-km 0010-region 010-nodeRun-04 250-km 0040-region 010-nodeRun-05 250-km 0040-region 040-nodeRun-06 250-km 0160-region 040-nodeRun-07 250-km 0160-region 160-nodeRun-08 250-km 2560-region 160-nodeRun-09 250-km 2560-region 256-nodeRun-10 120-km 0160-region 160-nodeRun-11 120-km 2560-region 256-node(by Satoh et al )status
done
done
done
done
done
done
done
submitted
readysubmitted
readyNICAM by PACS-CS
Run-07 250-km 0160-region 160-node(CPU allocation: 730 hours/year)

Future Plan
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Prediction model for the Arctic Oscillation
Ensemble Kalman filter using the barotropic S-model
Numerical experiments with NICAM
Urban climate simulation with the regional model WRF
Organize a regular session in Earth and Planet Conventions
Organize a special session in Meteorological Society of Japan
Organize an International Symposium on the Arctic Regions
Collaboration with National Institutes and IARC/UAF
Organize the Meteorological Research Consortium

END
Thanks !

発表論文リスト 2006-2007 (Tanaka)••••••••••••••••••••

Tanaka, H. L. and Koji Terasaki, 2006: Blocking Formation by an Accumulation of Barotropic Energy Exceeding the Rossby Wave Saturation
Level at the Spherical Rhines Scale. J. Meteor.Soc. Japan, 83, 319-332.
田中博 2006: 大気大循環に観られるE=mc^2の法則. 数理解析研究所講究録1483. 非線形波動の数理と応用、京都大学数理解析研究所、84-89.
Hayasaki, M., S. Sugata, and H.L. Tanaka 2006: Interannual variations of cold front activity in spring in Mongolia. J. Metor. Soc. Japan, 83,463-475.
Matsueda, M., M. Kyoda, and H.L. Tanaka 2006: Multi-center grand ensemble using three operational ensemble forecases. SOLA, 2, 33-36.
Tanaka, H.L., D. Nohara, and H.-R. Byun 2006: Numerical simulation of wind hole circulation at Ice Valey in Korea using a simple 2D model.
JMSJ 84, 1073-1084
Terasaki, K. and H.L. Tanaka 2006: Analysis of the 3D energy spectrum and interactions of the general circulation of the atmosphere using
analytical vertical structure functions. (Submitted to JMSJ).
Terasaki, K. and H.L. Tanaka 2006: Barotropic energy spectrum by the Rossby wavesaturation in the zonal wavenumber domain. SOLA, 3,25-28..
Watarai, Y. and H.L. Tanaka 2006: Comparison among JRA-25, ERA-40 and NCEP/NCAR reanalysis datasets from the viewpoint of global
energetics. SOLA, 3, 9-12.
Matsueda, M., M. Kyoda, H.L. Tanaka, and T. Tsuyuki 2006: Daily forecast skill of multi-center grand ensemble. SOLA, 3,29-32.
Byun, H.-R., K.-T. Byun, H.L. Tanaka, D. Azzaya, J.-H. Oh, and S. Kim 2006: On the ice control conserving water resources and suppressing
global warming. (Submitted).
田中博 2006: 異常気象をもたらす北極振動の解明とその予測. （第1報）.アサヒビール学術振興財団、2005年度研究紀要、地球環境科学、113--119.
田中博 2006: 気象予測とカオス、日本信頼性学会誌、28, 481-488.
田中博 2006: 異常気象をもたらす北極振動の解明とその予測（第２報）. アサヒビール学術振興財団研究紀要、地球環境科学、(submitted).
田中博 2007: 地球学シリーズ、「地球環境学」（共同執筆）、 (古今書院).
田中博 2007: 極域循環と日本の気候、「地球温暖化」（共同執筆）、 (月刊海洋特集号).
田中博 2007: 「偏西風の気象学」 （成山堂）.
Tsutsui, J. and H.L. Tanaka 2006: Trends in large-scale circulation and thermodynamic structures in the tropics derived from atmosphericreanalyses and climate change experiments. (Submitted ).
Tanaka, H.L. S. Kato, I. Suzuki (2007) A trial of predicting the Arctic Oscillation index using the barotropic S-model. Proc. GCCA-7, Fairbanks
AlaskaYokoyama, N. and H. L. Tanaka (2007) Seasonal variation of the Arctic Oscillation. Proc. GCCA-7, Fairbanks Alaska
Matsueda, M. M. Kyouda, H. L. Tanaka and T.Tsuyuki (2007) Daily forecast skill of multi-center grand ensemble. Proc. GCCA-7, Fairbanks
Alaska

原著論文査読付

7

著書3

その他

5 Submitted 4

発表論文リスト（論文，国際会議，会議報告）•Kusaka, H. and H. Hayami (2006) Numerical simulation of local
weather for a high photochemical Oxidant event using the WRF
model. JSME International Journal, Ser. B, vol. 49, p72-77.
• 日下博幸 (2006) 最新の気象モデルWRFを用いた平成16年新潟・福島豪雨の数値シミュレーション. 電力土木, No.324, p9-16.
• Tomita, T., H. Kusaka, R. Akiyoshi, and Y. Imasato (2007) Thermaland geometric controls on the rate of surface air temperaturechanges in a medium-size, mid-latitude city. Journal of AppliedMeteorology. In press.
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Kusaka, H., S. Kataniwa, H. L., Tanaka, F. Kimura, and M. Hara
(2006) Numerical simulation of polar low development over theJapan sea using the WRF model. 7th WRR Users workshop.

•菅原広史・大橋唯太・日下博幸・近藤裕明・浜田崇・山本奈美(2006)
ICUC6参加報告. 天気,
日下博幸・竹見哲也・原政之・稲田愛・坂本晃平（2007）第7回WRF
Users workshop報告．天気，3月号掲載予定．

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