Nav: Home

Two types of mid-latitude wave trains lead to extreme heat in South Korea and southern-central Japan

May 10, 2019

Global climate change has strongly increased the worldwide frequency of extreme heat in recent decades. South Korea and southern-central Japan are also frequently affected by extreme heat, and the extreme heat in these two regions tend to occur simultaneously. A scientific collaboration of climatologists examined the large-scale circulation leading to the concurrent extreme heat over South Korea and Southern-Central Japan. Their results have been published in Journal of Climate recently.

"The concurrent extreme heat result from a deep anomalous anticyclone over East Asia, which induces anomalous subsidence and consequent higher surface temperature," said Ke Xu, the first author on the paper, who is a postdoc working with Prof. Riyu Lu and Prof. Jiangyu Mao in the Institute of Atmospheric Physics, Chinese Academy of Sciences.

Xu also noted that the anomalous anticyclone is initiated by wave trains originating from upstream regions, which propagate eastward along the Asian westerly jet in the upper troposphere. "These wave trains can be categorized into two types that are characterized by the precursor anticyclonic and cyclonic anomalies, respectively, over central Asia," Xu said. "The two types of wave pattern are indicative to the occurrence of EH over South Korea and southern-central Japan."

The researchers further found that the distinction between these two types of wave train is modulated by the Asian westerly jet. "The Asian westerly jet, as the basic flow, can determine not only the propagation, but also the horizontal structure of the Rossby wave in terms of spatial scale and geographical distribution." Xu said. This work reveals the unique characteristics of the circulation responsible for extreme heat in South Korea and southern-central Japan. The wave patterns identified in this study are different from the patterns associated with the extreme heat in some other regions such as Europe, North America and China.

Other contributors include Prof. Baek-Jo Kim of the National Institute of Meteorological Sciences in South Korea, Prof. Jong-Kil Park and Prof. Jae-Young Byon of the Inje University in South Korea, Dr. Ruidan Chen of Sun Yat-sen University in China and Dr. Eun-Byul Kim of the Inje University in South Korea.
-end-


Institute of Atmospheric Physics, Chinese Academy of Sciences

Related Anomalous Anticyclone Articles:

Two types of mid-latitude wave trains lead to extreme heat in South Korea and southern-central Japan
South Korea and southern-central Japan are frequently affected by extreme heat, and the extreme heat in these two regions tend to occur simultaneously.
'Immunizing' quantum bits so that they can grow up
Qubits need a better immune system before they can grow up.
People with schizophrenia experience emotion differently from others, 'body maps' show
Vanderbilt University researchers are working to understand how people with schizophrenia experience emotion through their bodies.
What causes extreme heat in North China?
A collaborative research team from China has published a new analysis that shows the horizontal heat flux in the mixed layer plays a crucial role in extreme heat events in the North China Plain region.
Advancing the description of 'mysterious' water to improve drug design
Interactions with water dominate how drug molecules bind to targets, but it's tricky to model these interactions, limiting the accuracy of drug design.
A magnetic method to control the transport of chiral Majorana fermions
Majorana fermion with antiparticle being itself, was originally introduced as a putative elementary particle by Ettore Majorana in 1937, and the chiral Majorana fermion was experimentally observed in topological superconductors in 2017.
Scientists reveal spring cold spells that reduce crop yields
A new study reveals process of an extreme spring cold spell, which happens over North China.
Commercial airliners reveal three-dimensional distribution of atmospheric CO2 over Asia Pacific
Ten years of commercial airliner-based measurements uniquely revealed three-dimensional distribution of atmospheric CO2 and its seasonality over Asia Pacific.
Scientists find unusual behavior in topological material
Argonne scientists have identified a new class of topological materials made by inserting transition metal atoms into the atomic lattice of a well-known two-dimensional material.
Geoscientists find unexpected 'deep creep' near San Andreas, San Jacinto faults
A new analysis of thousands of very small earthquakes in the San Bernardino basin suggests that the unusual deformation of some may be due to 'deep creep' 10 km below the Earth's surface, say geoscientists at UMass Amherst.

Related Anomalous Anticyclone Reading:

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Anthropomorphic
Do animals grieve? Do they have language or consciousness? For a long time, scientists resisted the urge to look for human qualities in animals. This hour, TED speakers explore how that is changing. Guests include biological anthropologist Barbara King, dolphin researcher Denise Herzing, primatologist Frans de Waal, and ecologist Carl Safina.
Now Playing: Science for the People

#SB2 2019 Science Birthday Minisode: Mary Golda Ross
Our second annual Science Birthday is here, and this year we celebrate the wonderful Mary Golda Ross, born 9 August 1908. She died in 2008 at age 99, but left a lasting mark on the science of rocketry and space exploration as an early woman in engineering, and one of the first Native Americans in engineering. Join Rachelle and Bethany for this very special birthday minisode celebrating Mary and her achievements. Thanks to our Patreons who make this show possible! Read more about Mary G. Ross: Interview with Mary Ross on Lash Publications International, by Laurel Sheppard Meet Mary Golda...