An interdecadal decrease in extreme heat days in August over Northeast China around the early 1990s
2021-02-08
(Press-News.org) Against the background of global warming, extreme heat days (EHDs) occur frequently and greatly threaten human health and societal development. Therefore, it is of great importance to understand the variation of EHDs.
Previous studies have indicated that the frequency of EHDs is mainly modulated by the mean state of temperature, and thus the frequency of EHDs mostly presents an increasing trend.
"However, the variability of the daily maximum temperature also plays an important role in the interdecadal change of extreme heat days over Northeast China," says Ms. Liu Wenjun, a Master's student from the group of Dr. Ruidan Chen in the School of Atmospheric Sciences at Sun Yat-sen University and the first author of a paper recently published in Atmospheric and Oceanic Science Letters.
"The variability of the daily maximum temperature in August over Northeast China experienced a significant interdecadal decrease around the early 1990s, which overwhelmed the effect of the mean-state warming and led to an interdecadal decrease in extreme heat days," she explains.
The research team further discovered that the interdecadal change in the variability of daily maximum temperature is modulated by the atmospheric circulation.
"After the early 1990s, the influence of the Silk Road teleconnection and the East Asian-Pacific teleconnection on Northeast China weakened obviously, resulting in a decrease in the variability of the daily maximum temperature over Northeast China," concludes Liu.
INFORMATION:
Other contributors to this study include Dr. Ruidan Chen of the School of Atmospheric Sciences at Sun Yat-sen University and Prof. Zhiping Wen of the Department of Atmospheric and Oceanic Sciences at Fudan University.
[Attachments] See images for this press release:
ELSE PRESS RELEASES FROM THIS DATE:
2021-02-08
Researchers from Hong Kong Baptist University (HKBU) and the Faculty of Medicine at The Chinese University of Hong Kong (CU Medicine) have jointly developed the Spermine Risk Score which, coupled with the use of a urine test, provides a non-invasive and more reliable method for the diagnosis of prostate cancer. In a study conducted by the researchers, about 37% of the patients, who were ultimately found to have no prostate cancer, can avoid undergoing a prostate biopsy procedure. The findings have just been published in the scientific journal Prostate Cancer and Prostatic Diseases.
Demand for more reliable and non-invasive diagnosis
Prostate cancer is the third most common and the fourth most fatal cancer for the male ...
2021-02-08
Which bananas end up in your shopping basket-- the uniformly yellow ones or those with brown spots?
If you are like most people, you skip the spotted ones and select those that are perfectly yellow. This is because emotions play an an oversized role in our shopping decisions, according to a new study by Danish and Swedish researchers.
"We choose food based upon an expectation of what it will taste like that is bound to our feelings. So, if we expect a brown banana to not match the taste of a yellow one, we opt for the latter," explains Karin Wendin, an associate professor at University of Copenhagen's Department of Food Science, and one of the researchers behind the study.
Approximately 716,000 tonnes ...
2021-02-08
A team of researchers led by Nanyang Technological University, Singapore (NTU Singapore) has developed a new material, that when electricity is applied to it, can flex and bend forty times more than its competitors, opening the way to better micro machines.
Conversely, when it is bent, it generates electricity very effectively and could be used for better "energy harvesting" - potentially recharging batteries in gadgets just from everyday movements.
The novel material is both electrostrictive and piezoelectric. Its electrostrictive properties means it can change shape when an electric current is applied, while piezoelectric means the material can convert pressure into electric charges.
When an electric field is applied, the atoms that make up electrostrictive ...
2021-02-08
Although SGLT-2 inhibitors are central to the treatment of diabetes, their exact mode of action was hitherto unknown. In a study conducted by a research group led by Peter Wolf, Martin Krssak and Michael Krebs from MedUni Vienna's Department of Medicine III, magnetic resonance spectroscopy (MRS) was used to show that there is a direct correlation between the elimination of glucose via the kidneys and new glucose production in the liver. A single dose of the SGLT-2 inhibitor dapagliflozin gives rise to a beneficial regulation mechanism, in which glucose loss due to drug-induced SGLT-2 inhibition is exactly balanced out by an equal increase in new glucose production in the liver. The study has been published in the leading journal Diabetes Care.
Dapagliflozin is a drug from the group ...
2021-02-08
Researchers at the Kobe University Graduate School of Science have revealed that when captive-bred juvenile red-spotted masu salmon are released into natural streams, very few individuals become migrants.
Red-spotted masu salmon was an important fish species for the fishing industry in the rivers of west Japan, however in recent years their numbers are declining rapidly. The results of this research offer important suggestions for stocking practices and the management of river environments.
The research group consisted of graduate school students TANAKA Tatsuya and UEDA Rui and Associate Professor SATO Takuya. The results were published in Biology Letters ...
2021-02-08
[Background]
The human body consists of about 60 trillion cells that are renewed day by day to maintain homeostasis of body tissues. In particular, cells of the digestive tract are renewed completely within several weeks thanks to vigorous proliferation where tissue stem cells of every tissue play critical roles in supplying those cells. Tissue stem cells play essential roles in various phenomena such as histogenesis and recovery from damage by producing differentiated cells while dividing. They do this by producing identical cells (self-renewal) or by differentiating into other types of cells. The research team led by Profs. Murakami and Barker of the Cancer Research Institute, Kanazawa University revealed ...
2021-02-08
Betelgeuse is normally one of the brightest, most recognizable stars of the winter sky, marking the left shoulder of the constellation Orion. But lately, it has been behaving strangely: an unprecedentedly large drop in its brightness has been observed in early 2020 (Figure 1), which has prompted speculation that Betelgeuse may be about to explode.
To find out more, an international team of scientists, including Ken'ichi Nomoto at the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), conducted a rigorous examination of Betelgeuse. They concluded that the star is in the early core helium-burning phase (which is more than 100,000 ...
2021-02-08
A study reveals the genetic factors that may expose or protect people with Down syndrome from SARS-CoV-2 infection, as well as the prognosis of COVID-19.
Their findings, which are published in the journal Scientific Reports, follow previous studies showing a tenfold mortality risk of COVID-19 for people with Down syndrome, adding further evidence to boost existing calls for priority vaccination of the medically vulnerable group.
The researchers analysed all publicly available Down syndrome transcriptomic data to uncover alterations that might affect SARS-CoV-2's infection and disease progression.
TMPRSS2, a gene that codes for an enzyme critical for aiding the entry of SARS-CoV-2 in human cells, had 60% higher levels ...
2021-02-08
A study carried out at the University of Helsinki indicates that agricultural activity confuses the mechanisms that regulate the occurrence of plant diseases in nature. A wider variety of virus species was found in meadows close to agricultural fields compared to those located in natural surroundings, with the richness of plant species having no effect on the number of virus species. However, maintaining biodiversity is worthwhile, as plant richness did reduce the number of viral infections in the meadows.
An increasing share of the global land area is used for agricultural purposes, with more and more of the remaining area located at the boundary between agricultural and natural land, also known as the agro-ecological ...
2021-02-08
As part of a worldwide collaboration, Carnegie Mellon University chemists have helped discover that iodic acids can rapidly form aerosol particles in the atmosphere, giving scientists more knowledge of how iodine emissions can contribute to cloud formation and climate change.
"Essentially all uncertainty around climate change and the atmosphere has something to do with particles and cloud droplets," said Neil Donahue, Thomas Lord University Professor of Chemistry and a professor in the departments of Chemical Engineering, and Engineering and Public Policy. The Donahue ...
LAST 30 PRESS RELEASES:
[Press-News.org] An interdecadal decrease in extreme heat days in August over Northeast China around the early 1990s
