An Overview of Meiyu Research: Before and After the

TAMEX Project

Department of Atmospheric SciencesNational Taiwan University

Taipei, Taiwan(2007.11.06)

George Tai-Jen Chen

● Some Key Events Related to TAMEX

● Influences of TAMEX on Taiwan Meteorological Community

● Progress of Meiyu Research in Last 40 Years (1968–2007)

Some Key Events Related to TAMEX

Before 1987 Field Phase

During May–June 1987 Field Phase

Follow-up Research Phase(1988–1992)

Before 1987 Field Phase

May 28, 1981 heavy rainfall / flash flood events: $400–600 M in damage.

1981 1982 1983 1986

1982 National Science Council called for proposal on disaster prevention research.

1983 Project of Heavy Rainfall Research in Meiyu Season was proposed and sponsored.

1983–1986 planning phase of TAMEXTaiwan (ROC): 5 universities / colleges

+ 3 operational agencies (CWB, CAF, and CAA) / 40 professors and experts participated.

USA: 15 universities + 4 research agencies / 50 professors, scientists, and experts.

TAMEX Planning Group (1985, 2, 7)

CSD / NCAR talk on TAMEX (1985, 2, 7)

CSU talk on TAMEX (1985, 2, 9)

Planning Meeting / NCAR (1986, 9, 3)

During May–June 1987 Field Phase

Taiwan (ROC): 4 universities + 11 governmental agencies (80 scientists +1000 technical and administrative persons / students)

USA: 11 universities + NSF, NCAR + NOAA+ NRL (75 scientists / researcher / students)

13 IOPS + 10 P-3 flight missions

Follow-up Research Phase(1988–1992)

＊ Basic Research

1988 1989 1990 1991 1992

Feb. 9–11, 1988 Workshop / NCAR

June 22–30, 1989 Workshop / Taipei

Sep. 24–26, 1990 Workshop / NCAR

Dec. 3–6, 1991 Intl. Conf. on Mesoscale Meteorology and TAMEX / Taipei

Nov. 1991 TAMEX Special Issues in Mon. Wea. Rev.

Dec. 1992 TAMEX Special Issues in TAO

＊ Operational Research

1989 1990 1991 1992

Nov. 22, 1989 Planning Group FormedDec. 15, 1989 Project Office FormedDec. 30, 1989 8 Working Groups Formed (60 persons)

Feb. 26–March 3, 1990 Taiwan / US Planning Meeting ( I ) / TaipeiMay 14, 1990 Reform of Working Groups and Training GroupsDec. 17, 1990 US Advisory Group Formed (6 persons); 10

Working Groups (80 persons)

April 22–23 + May 1–3, 1991 Taiwan / US Planning Meeting (II) / Taipei

May 19–June 20, 1991 Pilot Exercises / CWBJune 25, 1991 Advisory Meeting / NCARDec. 7–10 1991 Taiwan / US Planning Meeting (III)

/ HengChun

May 1–June 30, 1992 Post TAMEX Forecast Exercises / CWB Nowcasting Room

1992 TAMEX Forecast Exercise

Influences of TAMEX on Taiwan Meteorological Community

Mordenization of Operational Community

Collaboration and Integration of Academic and Operational Communities

Mordenization of Operational Community (e.g. CWB)

Mesonetwork of Surface Observations (weather stations and raingauges)

Doppler Rader Network

WINS (Weather Integration and Nowcasting system)

Operational Mesoscale Model

Others

Collaboration and Integration of Academic and Operational Communities

Taiwan WRP (2000–2010)1) GIMEX (Green Island Mesoscale Exp.): May–June 2001

2) MEFSEA (Mesoscale Ensemble QPF System): Aug. 2003–July 2006

3) SoWFEX (Southwesterly Flow Observation and Heavy Rain

Predication Exp.): Aug. 2006–July 2010

4) Taiwan / USA TIMREX (Taiwan Island Monsoon Rainfall Experiment):

Aug. 2007–July 2010

Basic Weather Research Project (Organizer: Prof. Ben Jon, after TAMEX)

Applied Weather Research Project in Forecast / Prediction (Organizer: Deputy Director-General of CWB Dr. S. S. Chi, after TAMEX)

Progress of Meiyu Research in Last 40 Years(1968–2007)

Papers published in the international journals

Papers published on the synoptic environments and mesoscale features

Research by various countries

Journal papers of TAMEX

May-Juan 30 °N East Asia (Meiyu)≦Journals ： Mon. Wea. Rev., J. Atmos. Soc., Wea. Forecasting, Bull. Amer. Meteor.

Soc., J. Appl. Meteor., J. Climate, Quart. J. Roy. Meteor. Soc., J. Meteor. Soc. Japan, Meteor. Atmos. Phys., Atmos. Environ., Terr. Atmos. Ocean.

Keywords ： Mei-Yu, Mei-yu, meiyu, rainy season, Taiwan, southern China, front, MCS, LLJ, CMR, topographic, topography, orographic, orography, Taiwan area, monsoon

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JMSJAMS others

MWRTotals

TAOQJ/MAP/AE

Rapid increase in the total number of papers after TAMEX, particularly Mon. Wea. Rev.

Papers Published in the International Journals

Rapid increase in the number of papers in all mesoscale phenomena (MCS, Front, LLJ) after TAMEXMuch faster and steady growth in the number of papers in synoptic environment

Papers Published on the Synoptic Environments and Mesoscale Features

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Others

Env Front

LLJMCS

Topo

Rapid increase in the number of first authors from USA after TAMEXMuch faster and steady growth in the number of first authors in Taiwan after TAMEX

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TAMEX

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