1. Full name: Pham Thanh Ha                                      2. Sex: Female

3. Date of birth: 05/06/1993                                            4. Place of birth: Hanoi

5. Admission decision number: No. 4483/QĐ-ĐHKHTN dated on November 26th, 2015
by Rector of VNU University of Science, Vietnam National University.

6. Changes in academic process: Extension Decision number 568/QĐ-ĐHKHTN dated on February 14th, 2020 and 319/QĐ-ĐHKHTN dated on February 1st, 2021 by Rector of VNU University of Science, Vietnam National
University.

7. Official thesis title: Sub-seasonal to seasonal prediction of the rainy season onset date over Vietnam based on outputs from numerical models

8. Major: Meteorology                                                    9. Code: 9440222.01

10. Supervisors: Prof.Dr. Phan Van Tan 

11. Summary of the new findings of the thesis

Defined suitable rainfall-based criteria at the local scale and its applications to 131 stations in Vietnam based on the inter-annual similarity between local- and regional-scale RSODs.

Based on the selected criteria, the rainy season onset date over the Vietnam region from the observed data and its characteristics are analyzed from 1979 to 2019.

Analyzed the relationship between the rainy season onset dates and the large-scale atmospheric-oceanographic processes.

Developed the equations and evaluated the predictability of the rainy season onset date with the predictor variables from climate indexes and the CFSv2 models at the lead time below 6 months.

Evaluated the predictability of the rainy season onset date based on the raw output precipitation data of the ECMWF model with the forecasting lead times of 7-40 days.

12. Paratical applicability, if any: The thesis results can be applied to operational sub-seasonal and seasonal forecasts on the rainy season onset date in Vietnam.

13. Further research directions, if any: Analyze and apply bias correction to enhance the quality of the rainy season onset date forecasts over the Vietnam region.

14. Thesis-related publications:

Phan Van Tan, Pham Thanh Ha, Nguyen Dang Quang, Nguyen Van Hiep, Ngo Duc Thanh, (2016): “Change in onset date of rainy season in Central Highlands and predictability”, The VNU Journal of Science: Earth and Eniviromental Sciences, Vol 32, No 3S, 1-18.

Pham-Thanh, H, van der Linden, R, Ngo-Duc, T, Nguyen-Dang, Q, Fink, AH, Phan-Van, T., (2019): “Predictability of the rainy season onset date in Central Highlands of Vietnam”, Int J Climatol, 40, 3072– 3086. https://doi.org/10.1002/joc.6383.

Pham-Thanh, H., T. Phan-Van, A. H. Fink, and R. van der Linden, (2021): “Local-Scale Rainy Season Onset Detection: A New Approach Based on Principal Component Analysis and its Application to Vietnam”, International J. Climatol, doi: 10.1002/joc.7441.

Pham-Thanh, H., T. Phan-Van, R. van der Linden, and A. H. Fink, (2021): “The Performance of ECMWF sub-seasonal forecasts to predict the Rainy Season Onset Dates in Vietnam”. Weather and Forecasting, doi: 10.1175/WAF-D-21-0144.1.

Phạm Thanh Hà, Phan Văn Tân, (2022): “Objective Criteria to Determine the Rainy Season Onset Date for the Central Highlands and Southern Vietnam”, VNU Journal of Science: Earth and Environmental Sciences, Vol. 38, No. 1, 85-94.