Hawai'i drought during El Niño winter? Not always, according to new research
2021-01-07
(Press-News.org) El Niño events have long been perceived as a driver for low rainfall in the winter and spring in Hawai'i, creating a six-month wet-season drought. However, a recent study by researchers in the University of Hawai'i at Mānoa School of Ocean and Earth Science and Technology (SOEST) revealed the connection between Hawai'i winter rainfall and El Niño is not as straightforward as previously thought.
Studies in the past decade suggested that there are at least two types of El Niño: the Eastern Pacific and Central Pacific, when the warmest pool of water is located in the eastern or central portions of the ocean basin, respectively. El Niño events usually begin in summer and last for about one year.
The UH Mānoa team of atmospheric scientists analyzed data on the large-scale circulation patterns over the eastern and central Pacific to find that Hawai'i drought is only associated with the Eastern Pacific El Niño. For the central Pacific El Niño events, deficient rainfall in Hawaii occurred only 60% of the time. Therefore, a winter drought is not guaranteed following a Central Pacific El Niño.
The differences in how the Eastern and Central Pacific El Niño affect rainfall can be critical for proper planning and water resource management.
"This new result is a boon for many agencies in Hawai'i, for example, the Board of Water Supply, Hawai'i Department of Land and Natural Resources, and Hawai'i Department of Agriculture," said Pao-Shin Chu, SOEST professor, Hawai'i State Climatologist and co-author of the study. "Beyond these agencies, ranchers, flower growers, and other stakeholders that are concerned with the relationship between El Niño and water supply in Hawai'i may also benefit from the new findings."
Given that El Niño is a recurring phenomenon, knowing the type of El Niño that occurs will allow researchers and resource managers to more easily evaluate and prepare for Hawaiian regional climate in winter.
The team continues their research to explore other large-scale climate factors dominating the Hawaiian regional climate and affecting trade winds and rainfall patterns.
This study was also co-authored by SOEST atmospheric scientists Bo-Yi Lu, doctoral candidate and lead author; postdoctoral researcher Sung-Hun Kim; and associate professor Christina Karamperidou.
INFORMATION:
[Attachments] See images for this press release:
ELSE PRESS RELEASES FROM THIS DATE:
2021-01-07
WASHINGTON--Black and Hispanic people with COVID-19 and diabetes are more likely than Caucasians to die or have serious complications, according to a new study published in the Endocrine Society's Journal of Clinical Endocrinology & Metabolism. ...
2021-01-07
With an estimated lifespan between 25 to 40 years, the queen conch (Strombus gigas) is a prized delicacy long harvested for food and is revered for its beautiful shell. Second only to the spiny lobster, it is one of the most important benthic fisheries in the Caribbean region. Unfortunately, the species faces a challenge of survival: how to endure and thrive, as populations are in a steady state of decline from overfishing, habitat degradation and hurricane damage. In some places, the conch populations have dwindled so low that the remaining conch cannot find breeding partners. This dire situation is urgent in ecological and economic terms.
To preserve this most significant molluscan fishery in the Caribbean, ...
2021-01-07
Osaka, Japan - Medical professionals all want to be able to quickly and correctly diagnose diseases. Their future ability to do so will depend on identifying what biochemicals are present in tissue sections, where the biomolecules are, and at what concentrations. For this purpose, mass spectrometry imaging--which can identify multiple biochemicals in a single experiment--will be useful. However, the stability of biomolecular sampling needs improvement to obtain the chemical distribution information with high spatial resolution.
In the recent study published in Analytical Chemistry, researchers from Osaka University used mass spectrometry to image the distribution of ...
2021-01-07
A scalpel-free alternative to brain surgery has the potential to benefit people with Parkinson's disease symptoms that are much more severe on one side of the body, new research suggests.
More testing is needed, but the approach, which uses a technology called focused ultrasound, could offer a new option for patients whose symptoms are poorly controlled by medications and those who cannot or do not wish to undergo traditional brain surgery.
"This small brain region, the subthalamic nucleus, had a very strong and potent effect on parkinsonian symptoms when we targeted it with precise, focused ultrasound energy," ...
2021-01-07
The invention of optical fibers has revolutionized not only telecommunications but also sensing technology. Optical fiber sensors can measure strain, temperature, pressure, and many other physical parameters along the fibers, but they are currently immune to electromagnetic noise -- interference from other external electric or magnetic interactions. It is a desirable trait, until the effect of the electromagnetic field on the fibers needs to be measured. Now, an international team of researchers has used what was previously considered a 'damaged' part of an optical fiber to develop such a magnetic field sensor.
They published details of their approach on Nov. 5 in Advanced Photonics Research.
"This nature of immunity ...
2021-01-07
Methylcyclopentadiene (MCPD) is an important monomer in the production of RJ-4 fuel, a high-energy-density rocket fuel, and various valuable products.
Currently, MCPD is mainly obtained from the by-products of petroleum cracking tar at a very low yield of ~ 0.7 kg ton-1 and high price of ~10,000 USD ton-1. The exploration of highly efficient processes to convert renewable biomass to MCPD is stimulated by the energy and environment problems.
Recently, a group led by Prof. LI Ning and Prof. ZHANG Tao from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences (CAS) synthesized bio-based MCPD via direct hydrodeoxygenation of 3-methylcyclopent-2-enone (MCP) derived from cellulose.
Their study was published in Nature Communications on Jan. 4.
The researchers ...
2021-01-07
By comparing thousands of bacterial genomes, scientists in Gothenburg, Sweden have traced back the evolutionary history of antibiotic resistance genes. In almost all cases where an origin could be determined, the gene started to spread from bacteria that, themselves, can cause disease.
While human DNA is only passed down from parent to child, bacteria also have the habit of sharing some of their genes across species. This often applies to genes that make the bacteria resistant to antibiotics.
The use and overuse of antibiotics provide an advantage to those bacteria that have acquired resistance genes, thus further promoting the spread of resistance and making it more difficult to treat infections. This development threatens large parts of modern healthcare.
The rapid advances in DNA ...
2021-01-07
Tokyo, Japan - Guillain-Barré syndrome is an infamous autoimmune neuropathy, yet genetic variants predisposing individuals to this disease have yet to be described. In a new study, researchers from Tokyo Medical and Dental University (TMDU) discovered two novel genetic variants in a protein made by antibody-forming immune cells, providing a mechanism for the development of the disease.
The body's immune system is supposed to fight off invaders; however, in autoimmune diseases this defense goes rogue and attacks the host instead through the production of autoantibodies. Guillain-Barré syndrome (GBS) is an acutely developing, autoimmune peripheral neuropathy that leads to muscle ...
2021-01-07
Using synchrotron radiation at SPring-8 - a large-scale synchrotron radiation facility - Tohoku University, Toshiba Corporation, and the Japan Synchrotron Radiation Research Institute (JASRI) have successfully imaged the magnetization dynamics of a hard disk drive (HDD) write head for the first time, with a precision of one ten-billionth of a second. The method makes possible precise analysis of write head operations, accelerating the development of the next-generation write heads and further increasing HDD capacity.
Details of the research were published in the Journal of Applied Physics on October 6 and presented at the 44th Annual Conference on Magnetics in Japan, on December 14.
International Data Corporation predicts a five-fold increase ...
2021-01-07
The genomes of egg-laying monotreme mammals, platypus and echidna, have been published in the prestigious journal Nature, providing a valuable public resource for research in mammalian biology and evolution, with applications for their conservation and health.
Monotremes display a unique mix of mammalian and reptilian features and form the most distantly related, and least understood, group of living mammals. Their genetic blueprint provides fundamental insights into their unique biology and into the evolution of all mammals.
"The platypus and ...
LAST 30 PRESS RELEASES:
[Press-News.org] Hawai'i drought during El Niño winter? Not always, according to new research
