Farmers, hydroelectric power producers, shippers and wildlife managers remember the Columbia River Basin drought of 1992-1993 as a year of misery.
Scientists used tree-ring data from 32 sites, indicated with dots on a map of the Columbia River Basin, to reconstruct years of low river flows going back 250 years when written records are inconsistent or nonexistent.
Now researchers using tree-ring data have determined six multiyear droughts between 1750 and 1950 that were much more severe than anything in recent memory because they persisted for years, including one that stretched for 12 years. "Imagine what a drought lasting that long would do to the resources and economy of the region today," says Dave Peterson of the U.S. Agriculture Departments Forest Service Pacific Northwest Research Station and the University of Washingtons College of Forest Resources.
The study, recently published in the Journal of the American Water Resources Association, is the first to establish Columbia River flow estimates back 250 years, says lead author Zeev Gedalof of the University of Guelph, Ontario. Reliable natural-runoff estimates extend back only about 75 years, he says.
Sandra Hines | EurekAlert!
Global threat to primates concerns us all
19.01.2017 | Deutsches Primatenzentrum GmbH - Leibniz-Institut für Primatenforschung
Reducing household waste with less energy
18.01.2017 | FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH
For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.
According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
24.01.2017 | Earth Sciences
24.01.2017 | Life Sciences
24.01.2017 | Physics and Astronomy