Nav: Home

Why is east Asian summer monsoon circulation enhanced under global warming?

July 08, 2019

The near-surface southerly wind is a key feature of East Asian summer monsoon (EASM) circulation, and a stronger EASM circulation leads to a northward shift of East Asian rainfall. Almost all climate models show an enhanced EASM circulation in a warmer climate, and previous studies attributed the enhanced EASM to the enhanced zonal land-sea thermal contrast.

"However, the land-sea thermal contrast cannot explain the seasonality of the change in East Asian circulation." said Dr. Chao He from Jinan University, China, "What's more, the enhanced EASM circulation is associated with a large-scale cyclone anomaly around Tibetan Plateau (TP), motivating us to hypothesize that TP may play a certain role".

In a recent study published in Journal of Climate, Chao He and Tianjun Zhou from Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, in cooperation with Ziqian Wang from Sun Yat-sen University andTim Li from Nanjing University of Information Science and Technology, confirmed this hypothesis. The study shows that the TP plays an essential role in enhancing the EASM circulation under global warming through enhanced latent heating over the TP.

The team compared the global warming scenarios with the present-day climate in 30 coupled models from phase 5 of the Coupled Model Intercomparison Project (CMIP5). Indeed, the latent heating over TP and its southern slope is substantially enhanced, due to the increased atmospheric water vapor content and enhanced local hydrological recycling. As confirmed by Linear Baroclinic Model, the enhanced latent heating over TP stimulates a cyclone anomaly around TP, enhancing the southerly wind in East Asia. In addition, the latent heating over TP also explains the inter-model spread of the projected changes in EASM circulation among CMIP5 models.

This study cleared up the role of the TP on the response of EASM circulation to global warming. "As the TP plays a key role in the response of EASM to global warming in future climate projections, attention should be paid to the accurate simulation of physical processes over TP." said Zhou.
-end-


Institute of Atmospheric Physics, Chinese Academy of Sciences

Related Global Warming Articles:

Containing methane and its contribution to global warming
Methane is a gas that deserves more attention in the climate debate as it contributes to almost half of human-made global warming in the short-term.
Global warming and extinction risk
How can fossils predict the consequences of climate change? A German research team from Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), the Museum of Natural History Berlin and the Alfred Wegener Institute compared data from fossil and marine organisms living today to predict which groups of animals are most at risk from climate change.
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 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.
More Global Warming News and Global Warming Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Making Amends
What makes a true apology? What does it mean to make amends for past mistakes? This hour, TED speakers explore how repairing the wrongs of the past is the first step toward healing for the future. Guests include historian and preservationist Brent Leggs, law professor Martha Minow, librarian Dawn Wacek, and playwright V (formerly Eve Ensler).
Now Playing: Science for the People

#565 The Great Wide Indoors
We're all spending a bit more time indoors this summer than we probably figured. But did you ever stop to think about why the places we live and work as designed the way they are? And how they could be designed better? We're talking with Emily Anthes about her new book "The Great Indoors: The Surprising Science of how Buildings Shape our Behavior, Health and Happiness".
Now Playing: Radiolab

The Third. A TED Talk.
Jad gives a TED talk about his life as a journalist and how Radiolab has evolved over the years. Here's how TED described it:How do you end a story? Host of Radiolab Jad Abumrad tells how his search for an answer led him home to the mountains of Tennessee, where he met an unexpected teacher: Dolly Parton.Jad Nicholas Abumrad is a Lebanese-American radio host, composer and producer. He is the founder of the syndicated public radio program Radiolab, which is broadcast on over 600 radio stations nationwide and is downloaded more than 120 million times a year as a podcast. He also created More Perfect, a podcast that tells the stories behind the Supreme Court's most famous decisions. And most recently, Dolly Parton's America, a nine-episode podcast exploring the life and times of the iconic country music star. Abumrad has received three Peabody Awards and was named a MacArthur Fellow in 2011.