Nav: Home

Intensified global monsoon extreme rainfall signals global warming -- A study

October 30, 2019

Global warming has already led to significant increases in extreme rainfall over the global land monsoon regions over the past century, according to a study recently published in Journal of Climate.

The research, providing a global perspective of the monsoon regions which sprawl north and south from the Earth's equator, reveals significant associations between global warming and the observed intensification of extreme rainfall over the global monsoon region and its several subregions, including the southern part of South Africa, India, North America and the eastern part of the South America.

"Extreme rainfall over the global monsoon regions deserves specific attention as it is more intense than that on the rest of the land and affects nearly two-thirds of the world's population," said Prof. ZHOU Tianjun, the corresponding author on the paper. Zhou is a senior scientist at the State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics at the Institute of Atmospheric Physics and CAS Center for Excellence in Tibetan Plateau Earth Sciences in the Chinese Academy of Sciences. He is also a professor at the University of Chinese Academy of Sciences.

To maximize the data coverage for analysis, scientists combined several sets of long-running, high-quality global and regional extreme precipitation observations currently available. Employing rigorous statistical tests, they demonstrated that the significant influence of global warming on regional extreme rainfall changes is robust regardless of different time periods of analysis, criteria of selecting stations and datasets used.

While identifying an overall increase pattern in extreme rainfall over global monsoon regions as a whole, scientists also noted distinct regional characteristics. "This is because apart from global warming, extreme rainfall is also affected by regional processes such as aerosols, urbanization, and climate natural variability (i.e., the variability intrinsic to climate system)," said Prof. Zhou. "These effects are important especially at regional scales, such as for the East Asian and Australian monsoon regions."

The researchers will continue to study how different physical processes have affected extreme rainfall in the observations. "There are several challenges in the understanding of extreme rainfall changes, including the limited spatial and temporal coverages of the observations. Further improvement in monitoring and data sharing within the climate research community is required," Zhou said. "Our result laid a basis for further understanding of human influence on extreme rainfall changes in the monsoon regions."
-end-


Institute of Atmospheric Physics, Chinese Academy of Sciences

Related Global Warming Articles:

Intensified global monsoon extreme rainfall signals global warming -- A study
A new study reveals significant associations between global warming and the observed intensification of extreme rainfall over the global monsoon region and its several subregions, including the southern part of South Africa, India, North America and the eastern part of the South America.
Global warming's impact on undernourishment
Global warming may increase undernutrition through the effects of heat exposure on people, according to a new study published this week in PLOS Medicine by Yuming Guo of Monash University, Australia, and colleagues.
Global warming will accelerate water cycle over global land monsoon regions
A new study provides a broader understanding on the redistribution of freshwater resources across the globe induced by future changes in the monsoon system.
Comparison of global climatologies confirms warming of the global ocean
A report describes the main features of the recently published World Ocean Experiment-Argo Global Hydrographic Climatology.
Six feet under, a new approach to global warming
A Washington State University researcher has found that one-fourth of the carbon held by soil is bound to minerals as far as six feet below the surface.
Can we limit global warming to 1.5 °C?
Efforts to combat climate change tend to focus on supply-side changes, such as shifting to renewable or cleaner energy.
Global warming: Worrying lessons from the past
56 million years ago, the Earth experienced an exceptional episode of global warming.
Global warming: More insects, eating more crops
Rising global temperatures are expected to significantly increase crop losses from insects, especially in temperate regions, a new study finds.
Global fisheries could still become more profitable despite global warming
Global commercial fish stocks could provide more food and profits in the future, despite warming seas, if adaptive management practices are implemented.
Global warming may be twice what climate models predict
Future global warming may eventually be twice as warm as projected by climate models under business-as-usual scenarios and even if the world meets the 2°C target sea levels may rise six metres or more, according to an international team of researchers from 17 countries.
More Global Warming News and Global Warming Current Events

Top Science Podcasts

We have hand picked the top science podcasts of 2019.
Now Playing: TED Radio Hour

Accessing Better Health
Essential health care is a right, not a privilege ... or is it? This hour, TED speakers explore how we can give everyone access to a healthier way of life, despite who you are or where you live. Guests include physician Raj Panjabi, former NYC health commissioner Mary Bassett, researcher Michael Hendryx, and neuroscientist Rachel Wurzman.
Now Playing: Science for the People

#543 Give a Nerd a Gift
Yup, you guessed it... it's Science for the People's annual holiday episode that helps you figure out what sciency books and gifts to get that special nerd on your list. Or maybe you're looking to build up your reading list for the holiday break and a geeky Christmas sweater to wear to an upcoming party. Returning are pop-science power-readers John Dupuis and Joanne Manaster to dish on the best science books they read this past year. And Rachelle Saunders and Bethany Brookshire squee in delight over some truly delightful science-themed non-book objects for those whose bookshelves are already full. Since...
Now Playing: Radiolab

An Announcement from Radiolab