1 Session Summary “Heavy Rainfall and Flood in Vietnam and Southeast Asia” -Observation 1.Inter-comparison of precipitable water observed by GPS and AIRS in the Maritime Continents, Nobuhiko ENDO 2.Stable isotopes in precipitation at Da Nang, Vietnam, Kimpei Ichiyanagi

PWV time series at three GPS sites Seasonal variation was similar each other. Dry events well captured. AIRS PWV tends to drier than GPS PWV. AIRS Level-3 AIRX3STD.005 (daily)

Figure 3. Relationships between daily δD and δ 18 O in precipitation during whole period (left panel) and two periods (right panel). The results of river and lake water samples were also shown in the left panel. evaporation precipitation

4 Session Summary “Heavy Rainfall and Flood in Vietnam and Southeast Asia” -Observation -Pattern Classification 1.Inter-comparison of precipitable water observed by GPS and AIRS in the Maritime Continents, Nobuhiko ENDO 2.Stable isotopes in precipitation at Da Nang, Vietnam, Kimpei Ichiyanagi 3.Synoptic progress causing heavy rain in the summer monsoon onset in the North of Viet Nam, Pham Thi Thanh Huong 4.Time-space characteristics of heavy rainfall event in central Vietnam from mid- October to mid-November 2007, Kanamori Hironari

2. Synoptic patterns causing heavy rain in the first period of SM in the North VN 2.1 A cold front and its combination with other patterns 2.2. A tropical Cyclone and its combination with other patterns A monsoon trough and its combination with different patterns 2.4. Subtropical high-pressure and its combination with different patterns 2.5. Intertropical Convergence Zone and Intertropical Convergence Zone combined with different patterns

6 The patterns of the three heavy rainfall events were analyzed. The first event: the strong northeasterly over SCS. The third event: strong easterly from SCS to Cyclone Sidr.

7 Session Summary “Heavy Rainfall and Flood in Vietnam and Southeast Asia” -Observation -Pattern Classification -Flood Modeling 1.Inter-comparison of precipitable water observed by GPS and AIRS in the Maritime Continents, Nobuhiko ENDO 2.Stable isotopes in precipitation at Da Nang, Vietnam, Kimpei Ichiyanagi 3.Synoptic progress causing heavy rain in the summer monsoon onset in the North of Viet Nam, Pham Thi Thanh Huong 4.Time-space characteristics of heavy rainfall event in central Vietnam from mid- October to mid-November 2007, Kanamori Hironari 5.Severe floods in Central Vietnam simulated by the WRF-TRIP coupling system, Thanh NGO-DUC

03/2009 International MAHASRI/HyARC workshop T. NGO-DUC Page 8 WRF-TRIP coupling underestimations of WRF rainfall lead to systematic underestimation of river discharge simulated discharge reaches its maximum value in the same time with the observed one if a good estimation of rainfall is obtained, river discharge can be well forecasted using TRIP.

9 Session Summary “Heavy Rainfall and Flood in Vietnam and Southeast Asia” -Observation -Pattern Classification -Flood Modeling 1.Inter-comparison of precipitable water observed by GPS and AIRS in the Maritime Continents, Nobuhiko ENDO 2.Stable isotopes in precipitation at Da Nang, Vietnam, Kimpei Ichiyanagi 3.Synoptic progress causing heavy rain in the summer monsoon onset in the North of Viet Nam, Pham Thi Thanh Huong 4.Time-space characteristics of heavy rainfall event in central Vietnam from mid- October to mid-November 2007, Kanamori Hironari 5.Severe floods in Central Vietnam simulated by the WRF-TRIP coupling system, Thanh NGO-DUC