800 year paleoclimate pattern revealed in Asia’s largest study of rivers
Longest Asian Rivers
This river is being discharged at 62 stations in 813 years, 41 rivers from 16 countries, from 1200 to 2012. This is the data that researchers at Called Singapore University of Technology and Design (SUTD) created after two years of research to better understand the past. Climate patterns of the Longest asian river monsoon region.
Longest asian Rivers
|3.||Mekong||China, Myanmar, Laos, Thailand, Cambodia, Vietnam||4909|
|5.||Irtysh River||Mongolia, China, Kazakhstan, Russia||4248|
|6.||Brahmaputra River||China, India, Bangladesh||3848|
|8.||Indus River (Sindh)||China, India, Pakistan||3610|
|9.||Yenisei River||Mongolia, Russia||3487|
|10.||Nizhnyaya Tunguska River||Russia||2989|
|11.||Yarlung Tsangpo River||China, India, Bangladesh||2840|
|12.||Amur River||Russia, China||2824|
|China, Myanmar, Thailand||2800|
|14.||Euphrates||Iraq, Syria, Turkey||2760|
|16.||Ganges (Ganga)||India, Bangladesh||2510|
|17.||Amu Darya||Afghanistan, Tajikistan, Turkmenistan, Uzbekistan||2500|
|18.||Ishim River||Kazakhstan, Russia||2450|
|19.||Ural River||Kazakhstan, Russia||2428|
|20.||Pearl River||China, Vietnam||2320|
Home to several populated river valleys, including the world’s ten largest rivers Figure 1, provides water, energy and food for more than three billion people in the Asian monsoon region. This makes it important for us to understand past climate patterns so that we can better estimate long-term changes in the water cycle and this will also have an impact on water supply.
To reconstruct the history of river discharge, researchers relied on tree rings. An earlier study by Cook et al. (2010) developed an extensive network of tree ring data sites in Asia and created a palodroid record called Monsoon Longest asian river Drought Atlas (MADA). SUTD researchers used MADA as an input for their river discharge model.
They developed an innovative process to select the most relevant subclass of mada for each river on the basis of hydroclimatic similarity. This process allowed the model to extract the most important climatic signals that affect Longest asian river discharge from the underlying tree ring data.
“Our results suggest that rivers in Longest asian river behave in a consistent pattern. Large droughts and major platonic periods often occur together in adjacent or adjoining valleys. Occasionally, droughts occur from the Godavari in India to the Mekong (Fig. 2) in southeast Asia. This has important implications for water management, especially when the country’s economy depends on many river valleys, such as in the case of Thailand, “first author Nguyen Tan Thai Hung, a PhD student from SUTD.
Using modern measurements, it is known that the behavior of Longest asian river is influenced by the oceans. For example, if the Pacific Ocean warms up in its tropical region in an El Niño event, it will cause atmospheric circulation and drought in the South and Southeast Asian rivers.
However, the SUTD study revealed that this ocean – river connection is not stable over time. Researchers found that rivers in Asia were less affected by the seas in the first days of the 20th century than they were in the first half of the 20th century and 50 years after that period. “This research is of great importance to policy makers;
We need to know where and why river discharge changed during the last millennium to make major decisions on water-dependent infrastructure. One such example is the development of the ASEAN Power Grid, which is conceived to connect a system of hydroelectric, thermoelectric and renewable power plants in all ASEAN countries. Our records show that ‘mega-drots’ have hit several power generation sites simultaneously,
So we can now use this information to design a weak grid during peak events, “said lead investigator Associate Professor Stefano Galilei to SUTD:” Hung Streamflow Variability in Monsoon Asia over the Past at Centuries – Ocean Drivers ” Link ”Hung TT Nguyen, Sean WD Turner, Brendan M. By Buckley and Stefano Galilei, 26 September 2020, Water Resources Research.