All about weather. Learn how meteorologists forecast the weather and why some weather systems are hard to predict.
Uuendatud: 3 tundi 24 minutit tagasi
A new scientific article shows that 25 European waterbird species can change their wintering areas depending on winter weather. Warm winters allow them to shift their wintering areas northeastwards, whereas cold spells push birds southwestwards.
Currently, half of the world's measured precipitation that falls in a year falls in just 12 days, according to a new analysis of data collected at weather stations across the globe. By century's end, climate models project that this lopsided distribution of rain and snow is likely to become even more skewed, with half of annual precipitation falling in 11 days.
New supercomputer simulations by climate scientists have shown that climate change intensified the amount of rainfall in recent hurricanes such as Katrina, Irma, and Maria by 5 to 10 percent. They further found that if those hurricanes were to occur in a future world that is warmer than present, those storms would have even more rainfall and stronger winds.
Researchers found that Houston's urban landscape directly contributed to the torrential rainfall and deadly flooding of Hurricane Harvey in 2017. Houston's risk for extreme flooding was 21 times greater due to urbanization. The results highlight the human role in extreme weather events and the need to consider urban and suburban development when calculating hurricane risk.
New research by geoscientists shines a light on this hidden world from ridgetops to valley floors and shows how rainfall shapes the part of our planet that is just beyond where we can see.
Milder winter weather increased regional crime rates in the United States over the past several decades, according to new research that suggests crime is related to temperature's effect on daily activities.
As an indicator of the impacts of climate change, Arctic sea ice is hard to beat. Scientists have observed the frozen polar ocean advance and retreat at this most sensitive region of the Earth over decades for insight on the potential ripple effects on assorted natural systems: global ocean circulation, surrounding habitats and ecosystems, food sources, sea levels and more.
Researchers have evidence that Kawasaki Disease (KD) does not have a single cause. By studying weather patterns and geographical distributions of patients in San Diego, the research team determined that this inflammatory disease likely has multiple environmental triggers influenced by a combination of temperature, precipitation and wind patterns.
New research identifies areas of the UK which could rival the Champagne region of France. Climate and viticulture experts identified nearly 35,000 hectares of prime viticultural land for new and expanding vineyards -- much of it in Kent, Sussex and East Anglia. As climate change drives warmer growing season temperatures in England and Wales, this new viticulture suitability model allows, for the first time, an objective and informed rapid assessment of land at local, regional and national scales.
Even a Category 4 hurricane doesn't kill the mood for coastal fish -- and that's good news for all species, as well as for a multibillion-dollar recreational fishing industry. As extreme weather patterns threaten to bring more and larger storms to the Gulf Coast, new findings show some important fish species are able to continue spawning even in a severe storm.
One concern with the increase vessel transits in the western Canadian Arctic is how noise pollution can detrimentally affect marine animals. Researchers have found that the negative impact of noise from shipping vessels can be mitigated by reducing the ship's speed.
Continued burning of fossil fuels is likely to fuel even more extreme summers than that of 2018 because of its impact on the jet stream. The rapid disappearance of aerosols produced by pollution may, however, mitigate the impact until mid-century if countries like China phase out these fuels, according to scientists using climate models to predict changes in the occurrence of so-called Quasi-Resonant Amplification (QRA) events associated with persistent weather extremes.
Researchers studying the sharp decline between 1980 and 2010 in documented landings of the four most commercially-important bivalve mollusks -- eastern oysters, northern quahogs, softshell clams and northern bay scallops -- have identified the causes. Warming ocean temperatures associated with a positive shift in the North Atlantic Oscillation (NAO), which led to habitat degradation including increased predation, are the key reasons for the decline of these four species in estuaries and bays from Maine to North Carolina.
Larger tropical stingless bees fly better in hot conditions than smaller bees do and larger size may help certain species better tolerate high body temperatures. The findings run contrary to the temperature-size 'rule,' which suggests that insects that rely on the external environment to control their temperature are larger in cold climates and smaller in hot ones.
An annual model-based report on low-oxygen conditions in Chesapeake Bay during 2018 indicates a total volume of 'hypoxic' waters very similar to the previous year, but with a dramatic drop in hypoxia during late July due to mixing by strong winds. The duration of hypoxia in 2018 was greater than in recent years.
Researchers have demonstrated for the first time that runoff extremes have been dramatically increasing in response to climate and human-induced changes. Their findings show a large increase in both precipitation and runoff extremes driven by both human activity and climate change. They also found that storm runoff has a stronger response than precipitation to human-induced changes (climate change, land-use land-cover changes, etc).
The fall of Angkor has long puzzled historians, archaeologists and scientists, but now a research team is one step closer to discovering what led to the city's demise -- and it comes with a warning for modern urban communities.
We live in an age of long-range information. Research is turning towards the use of lasers which have several advantages. However, this new technology faces a major problem: clouds. Due to their density, clouds stop the laser beams and scramble the transfer of information. Researchers have now devised an ultra-hot laser that creates a temporary hole in the cloud, which lets the laser beam containing the information pass through.
School students have successfully identified sounds caused by a solar storm in the Earth's magnetic shield. The group of students identified a series of waves whose pitch decreased over the course of several days. They found that this event occurred after a Coronal Mass Ejection or 'solar storm' caused a great disturbance to Earth's space environment.
Winds blowing across snow dunes on Antarctica's Ross Ice Shelf cause the massive ice slab's surface to vibrate, producing a near-constant set of seismic 'tones' scientists could potentially use to monitor changes in the ice shelf from afar, according to new research.
Keskkonna- ja loodusuudised
20.11. 22:36Suur linnuõhtu 4. detsembril Tallinnas20.11. 16:15Bioneer soovitab - Maailma süda20.11. 12:10Rabapistrik vs kõnnupistrik – kes keda?20.11. 09:0946. NÄDAL 12.11.2018.- 18.11.2018. Jõgeval ja selle ümbruses19.11. 19:15Aasta veetegu 201819.11. 12:15Täna on rahvusvaheline vetsude päev19.11. 12:15Teejänes Veel
21. novembri ekstreemumid 2008-2018
Täna Tallinnas kõige soojem on olnud 9,5°C (1996) ja külmem -15,2°C (1946).
Täna Tartus kõige soojem on olnud 10,0°C (1926) ja külmem -16,4°C (1965).