An analysis of precipitation data collected from a lakebed in New York and a Rhode Island estuary has provided a link between the variability of precipitation in the Northeast with that of the Southwest. The results validate climate models that predict an increasing number of extreme weather events.
The research was published in the online edition of the Proceedings of the National Academy of Sciences on Oct. 19.
Former URI graduate student J. Bradford Hubeny, currently an assistant professor of geological sciences at Salem State University, and John King, a professor in the University of Rhode Island's Graduate School of Oceanography, reconstructed the precipitation record from Green Lake in Fayetteville, N.Y., and the Pettaquamscutt River estuary in Narragansett, R.I. They found that the moisture patterns at these sites were similar and correlated with the Pacific/North American pattern, a large-scale weather pattern that circulates from the North Pacific Ocean across North America.
"Really long droughts and extended wet periods appear to occur at a continental scale," said King. "We can see that the records of droughts in the Southwest extend all the way to eastern North America."
Added Hubeny, "The same phase of the Pacific/North American pattern that would bring us dry conditions in the Northeast would also bring dry conditions to the Southwest."
The scientists noted that while their research found a strong connection between the climate in the Northeast and Southwest, that doesn't necessarily mean that both regions will experience the same conditions.
Hubeny and King reconstructed the precipitation record by examining the thickness of annual sediment layers called varves, somewhat like tree rings, which relate to the amount of precipitation in a given year.
"The strength of going back 1,000 years is that we can look at the natural variability in the precipitation record," Hubeny said. "What we can see from the last 150 to 200 years are changes in the natural pattern that could represent human impact on climate.
"At first glance, precipitation variability might seem random, and to some extent it is. But there are also global patterns that are predictable," he explained. "The more we can understand these patterns, the more we can help to quantify climate models and cycles."
According to the scientists, the objective of studies such as this is to provide improved predictive capabilities of future climate. The strong relationship this study provides between the meteorological record and the geological record will help make climate forecasts more accurate.
"We've confirmed the recent trend toward a more meridional circulation pattern, which increases the frequency of flooding and decreases the frequency of droughts in the Northeast," King said. "The unusual weather is going to become more usual. The good news is that we probably won't have mega-droughts like they're experiencing in other parts of the country, but we will be in for more extreme weather events."
Todd McLeish | EurekAlert!
Study relating to materials testing Detecting damages in non-magnetic steel through magnetism
23.07.2018 | Technische Universität Kaiserslautern
Innovative genetic tests for children with developmental disorders and epilepsy
11.07.2018 | Christian-Albrechts-Universität zu Kiel
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur
What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...
The quality of materials often depends on the manufacturing process. In casting and welding, for example, the rate at which melts solidify and the resulting microstructure of the alloy is important. With metallic foams as well, it depends on exactly how the foaming process takes place. To understand these processes fully requires fast sensing capability. The fastest 3D tomographic images to date have now been achieved at the BESSY II X-ray source operated by the Helmholtz-Zentrum Berlin.
Dr. Francisco Garcia-Moreno and his team have designed a turntable that rotates ultra-stably about its axis at a constant rotational speed. This really depends...
08.08.2018 | Event News
27.07.2018 | Event News
25.07.2018 | Event News
14.08.2018 | Information Technology
14.08.2018 | Life Sciences
14.08.2018 | Life Sciences