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All about weather. Learn how meteorologists forecast the weather and why some weather systems are hard to predict.
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Scientists develop tool which can predict coastal erosion and recovery in extreme storms

11. Oktoober 2017 - 16:17
Coastal scientists have developed a computerized model which goes some way to answering their subject's 'holy grail' -- how to use existing data to confidently forecast annual coastal erosion and accretion.
Kategooriad: Välismaa uudised

Droughts and wildfires: How global warming is drying up the North American monsoon

9. Oktoober 2017 - 19:31
Previous researchers had concluded that global warming was simply delaying the North American monsoon, which brings summer rains to the southwestern US and northwestern Mexico. But a new, high-resolution climate model that corrects for persistent sea surface temperature (SST) biases now accurately reflects current rainfall conditions and demonstrates that the monsoon is not simply delayed, but that the region's total rainfall is facing a dramatic reduction.
Kategooriad: Välismaa uudised

Tracking debris in the Earth‘s orbit with centimeter precision using efficient laser technology

5. Oktoober 2017 - 17:38
Uncontrollable flying objects in orbit are a massive risk for modern space travel, and, due to our dependence on satellites today, it is also a risk to global economy. Scientists have now developed a fiber laser that reliably determines the position and direction of the space debris' movement to mitigate these risks.
Kategooriad: Välismaa uudised

Sunlight and 'right' microbes convert Arctic carbon into carbon dioxide

4. Oktoober 2017 - 23:38
A new study outlines the mechanisms and points to the importance of both sunlight and the right microbial community as keys to converting permafrost carbon to CO2.
Kategooriad: Välismaa uudised

Energy harvested from evaporation could power much of US

26. September 2017 - 19:51
In the first evaluation of evaporation as a renewable energy source, researchers find that US lakes and reservoirs could generate 325 gigawatts of power, nearly 70 percent of what the United States currently produces.
Kategooriad: Välismaa uudised

Higher risk of heart failure in cold weather

26. September 2017 - 16:14
Could decreases in temperature cause heart failure and death?
Kategooriad: Välismaa uudised

Antarctica: The wind sublimates snowflakes

25. September 2017 - 22:14
A team of researchers has collected new data that shows a significant decrease in snow precipitation close to the ground in Antarctica, which has an impact on the ice sheet surface mass balance.
Kategooriad: Välismaa uudised

Winter cold extremes linked to high-altitude polar vortex weakening

22. September 2017 - 16:40
When the strong winds that circle the Arctic slacken, cold polar air can escape and cause extreme winter chills in parts of the Northern hemisphere. A new study finds that these weak states have become more persistent over the past four decades and can be linked to cold winters in Russia and Europe.
Kategooriad: Välismaa uudised

Wave Glider surfs across stormy Drake Passage in Antarctica

20. September 2017 - 21:46
A hardy ocean drone made a first-ever attempt to surf across Antarctica's stormy Drake Passage gathering data about ocean mixing.
Kategooriad: Välismaa uudised

Gravity waves influence weather and climate

20. September 2017 - 17:00
Gravity waves form in the atmosphere as a result of destabilizing processes. The effects of gravity waves can only be taken into consideration by including additional special components in the models.
Kategooriad: Välismaa uudised

End-of-summer Arctic sea ice extent is eighth lowest on record

19. September 2017 - 23:01
Arctic sea ice appeared to have reached its yearly lowest extent on Sept. 13, scientists have reported. Analysis of satellite data showed that at 1.79 million square miles (4.64 million square kilometers), this year's Arctic sea ice minimum extent is the eighth lowest in the consistent long-term satellite record, which began in 1978.
Kategooriad: Välismaa uudised

Changes in non-extreme precipitation may have not-so-subtle consequences

19. September 2017 - 19:31
Extreme floods and droughts receive a lot of attention. But what happens when precipitation -- or lack thereof -- occurs in a more measured way?
Kategooriad: Välismaa uudised

Devilish source of dust in atmosphere of Earth and Mars

18. September 2017 - 16:28
Swirling columns of sand and dust, known as dust devils, are a feature of desert areas on Mars and on Earth. Now, a study of terrestrial dust devils has shown that around two thirds of the fine particles lifted by these vortices can remain suspended in the atmosphere and be transported around the globe. The findings have implications for the climate and weather of both planets and, potentially, human health here on Earth.
Kategooriad: Välismaa uudised

Black Sea water temperatures may buck global trend

15. September 2017 - 23:29
Scientists have successfully simulated the Black Sea’s long term currents, salt water content and temperature for the first time.
Kategooriad: Välismaa uudised

Hydrogen power moves a step closer

14. September 2017 - 22:22
Physicists are developing methods of creating renewable fuel from water using quantum technology. Renewable hydrogen can already be produced by photoelectrolysis where solar power is used to split water molecules into oxygen and hydrogen. But fundamental problems remain before this can be adopted commercially due to inefficiency. A new study demonstrates that the novel use of nanostructures could increase the maximum photovoltage generated in a photoelectrochemical cell, increasing the productivity of splitting water molecules.
Kategooriad: Välismaa uudised

Clouds like honeycomb

11. September 2017 - 22:09
An innovative network approach to explain polygonal patterns in clouds could help scientists find more accurate descriptions of clouds in computer models of weather and climate change.
Kategooriad: Välismaa uudised

Urban climate change

11. September 2017 - 22:09
Southern cities such as Houston and Tampa -- which faced the wrath of hurricanes Harvey and Irma, respectively -- may not be the only urban environments vulnerable to extreme weather. Northern cities also face the potential for flooding as global temperatures continue to warm.
Kategooriad: Välismaa uudised

How openings in Antarctic sea ice affect worldwide climate

11. September 2017 - 19:26
In a new analysis of climate models, researchers reveal the significant global effects that seemingly anomalous polynyas, or openings in sea ice, can have. Their findings indicate that heat escaping from the ocean through these openings impacts sea and atmospheric temperatures and wind patterns around the globe and even rainfall around the tropics.
Kategooriad: Välismaa uudised

Extreme weather has limited effect on attitudes toward climate policies

7. September 2017 - 21:46
People who recently experienced severe weather events such as floods, storms and drought are more likely to support policies to adapt to the effects of climate change, according to a new study.
Kategooriad: Välismaa uudised

Warmer world may bring more local, less global, temperature variability

5. September 2017 - 19:32
Many tropical or subtropical regions could see increases in naturally occurring temperature variability as Earth warms over coming decades, a new study suggests. These local changes could occur even though Earth's global mean surface temperature variability will likely decrease because of less solar reflection from icecaps at high latitudes.
Kategooriad: Välismaa uudised

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