Spatial-temporal variability of streamflow in monsoon Asia over the past eight centuries and links to climate drivers
About the Event:
The Asian Monsoon region is home to a quarter of the world’s population, most of whom relies on rivers for water supply. Water management in this region would benefit from an improved understanding of long-term hydrologic variability, made possible with streamflow reconstruction studies. In this work, we produce the first large-scale streamflow reconstruction over the last eight centuries in monsoon Asia, using a Linear Dynamical Systems approach and the Monsoon Asia Drought Atlas (MADA) as the paleoclimate proxy. The reconstructions reveal a history of regime shifts with prolonged droughts exceeding the lengths of those found in instrumental records and show the spatial footprints of the Asian megadroughts. Analyses of the dominant modes of variability suggest that streamflow in Asia is linked to both ENSO and IOD, but these relationships vary significantly through space and time. Overall, our findings advance understanding of regional hydrologic variability and can help improve water resource management practice in many countries.
About the Speaker:
Nguyen Tan Thai Hung is a PhD candidate at the Singapore University and Design. He is interested in long-term hydroclimatic variability and how such understanding can improve water management practices. These research areas align well with his love for statistics and mathematical modelling.