Εμφάνιση αναρτήσεων με ετικέτα heat wave. Εμφάνιση όλων των αναρτήσεων
Εμφάνιση αναρτήσεων με ετικέτα heat wave. Εμφάνιση όλων των αναρτήσεων

Πέμπτη 30 Οκτωβρίου 2014

Earth to face unprecedented heatwave in 2015


NASA experts believe that in 2015, planet Earth will have to deal with an unprecedented heatwave. The forecast is based on temperature trends of recent years.

Since the start of permanent climate observations in 1880, the frequency of temperature anomalies has been growing. Occurrences of high average temperatures follow each other: in 1995, 1997, 1998, 2005 and 2010.

This September, average global temperature was 15.7 degrees Celsius, which is a new record for the past 135 years. During the first nine months of this year, average global temperature made up 14.7 degrees Celsius.

NASA experts say that the current year can be regarded the hottest since 1998. However, in the summer of 2015, different regions of the world will experience an unprecedented heatwave and drought, Rosbalt reports. 

Source: Pravda.Ru
30/10/14
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Σάββατο 4 Οκτωβρίου 2014

NASA Satellite Images Reveal Shocking Groundwater Loss in Drought-Stricken California

NASA’s Gravity Recovery and Climate Experiment (GRACE) program has released a series of satellite images, taken in June 2002, June 2008 and June of this year, showing the  stunning groundwater loss in California which is in its third year of record drought.... 

“This trio of images depicts satellite observations of declining water storage in California as seen by NASA’s Gravity Recovery and Climate Experiment satellites,” says NASA. “Colors progressing from green to orange to red represent greater accumulated water loss between April 2002 and June 2014.”

The prolonged drought has impacted everything from agriculture to fisheries to residential use, worsened and prolonged the wildfire season and created conflicts over the use of water resources.
That has included calls for banning water-intensive fracking and disputes over the diversion of river water for the state’s even more water-intensive agriculture sector, primarily in its fertile Central Valley.

“California’s Sacramento and San Joaquin River basins, including the Central Valley, have suffered the greatest losses, in part due to increased groundwater pumping to support agricultural production,” said NASA. “Between 2011 and 2014, the combined river basins have lost 4 trillion gallons of water each year, an amount far greater than California’s 38 million residents use in cities and homes annually.”

Gov. Brown declared a state of emergency in January after the state had its lowest recorded rainfall in its history.

*** GRACE is a collaborative endeavor involving the Center for Space Research at the University of Texas, Austin; NASA’s Jet Propulsion Laboratory, Pasadena, Calif.; the German Space Agency and Germany’s National Research Center for Geosciences, Potsdam.


Anastasia Pantsios | October 3, 2014
ecowatch.com
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Σάββατο 2 Αυγούστου 2014

California Experiencing Most Severe Drought Ever Recorded

One of the worst North American droughts in history could be getting a whole lot worse. According to the latest U.S. Drought Monitor Map released on Tuesday, more than 58 percent of California is in an “exceptional drought” stage. That’s up a staggering 22 percent from last week’s report. And, in its latest drought report released earlier today, the National Drought Mitigation Center warned that “bone-dry” conditions are overtaking much of the Golden State, and noted that, overall, California is “short more than one year’s worth of reservoir water, or 11.6 million acre-feet, for this time of year.”

All across California, streams are drying up, crops are dying off and local communities are struggling to maintain access to water, thanks to 3 years of persistent drought conditions. 
The situation is so dire that on Tuesday, California implemented state-wide emergency water-conservation measures, in an effort preserved what remaining water there is. Under the new measures, Californians can face fines of up to $500 per day for using hoses to clean sidewalks, run decorative fountains, and other water-guzzling activities.
Unfortunately, while the situation in California is already pretty bleak, it looks like things are only going to get worse. In fact, it’s possible that all of the American southwest could soon be seeing the devastating drought conditions that Californians are facing. That’s because the largest surge of heat ever recorded moving west to east in the Pacific Ocean, often referred to as a Kelvin Wave, which was supposed to start an El Nino and bring tropical-like rains to the West Coast and southwest, just dissipated, after it was absorbed by abnormally warm ocean waters.

An El Nino is marked by the prolonged warming of Pacific Ocean surface temperatures, when compared to the average temperature. El Ninos usually happen every two to seven years, and can last anywhere between nine months and two years. As warm water spreads from the western Pacific and the Indian Ocean to the eastern Pacific, it brings rain and moisture with it, bringing rain to California and the American Southwest. 
So, during an El Nino period, winters are often a lot wetter than usual in the southwest U.S., including in central and southern California, where drought conditions are currently the worst. That’s why Californians were hoping for a strong El Nino period, to bring the rains and moisture that’s needed to help ease the drought.

Unfortunately, while some weather models are still predicting that an El Nino is possible, the chances of an El Nino strong enough to break the devastating drought that California is seeing are now very, very slim. As a result, there’s probably no end in sight to the current drought conditions in California. And, since warm ocean waters that bring rain are moving farther north up the Pacific, while Oregon and Washington and Alaska will get rain, the jet stream is set to extend drought-like conditions to much of the southwest.......................................ecowatch.com
1/8/14

Τρίτη 8 Ιανουαρίου 2013

'Catastrophic': Hundreds of wildfires rage in Australia amid record heat wave (VIDEO, PHOTOS RT)


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A heat wave that has already caused devastating fires on the Island state of Tasmania, with 100 people still missing, has now moved to mainland Australia and is reaping havoc in New South Wales, as the heat wave looks to smash records.
­In some areas temperatures have shot up by as much as 20C in three hours and combined with 50 mph winds have created disastrous fire conditions.

Right across Australia records have been broken by the heat wave and the Bureau of Meteorology (BoM) has been forced to add colors to its forecast charts to take account of temperatures of 50-54 degrees Celsius.
Australia’s all-time record of 50.7 degrees; set in January 1960 at Oodnadatta in South Australia is likely to be smashed over the coming days. On Tuesday, in some places temperatures of 45 degrees Celsius were recorded.
“The scale has just been increased today and I would anticipate it is because the forecast coming from the bureau’s model is showing temperatures in excess of 50 degrees,” David Jones , the BoM’s head of climate monitoring, told Fairfax newspapers.
Australia as a whole experienced its hottest day on record on Monday, with average maximum temperatures across the entire country reaching 40.33 degrees breaking the previous record of 40.17 degrees set in 1972.
More than 130 fires are already blazing away in New South Wales (NSW), where fire officials said conditions were among the worst they had ever seen for wildfires. Fires had already burnt more than 30,000 hectares of land across NSW.
There are also wildfires burning in Victoria with 20 homes evacuates in Chepstowe, west of Australia’s second city Melbourne.
.rt.com
8/1/13
Houses destroyed by a bushfire are seen in ruins in Dunalley, about 40 kilometres (25 miles) east of Hobart, January 5, 2013. (Reuters/Chris Kidd/Pool)
Houses destroyed by a bushfire are seen in ruins in Dunalley, about 40 kilometres (25 miles) east of Hobart, January 5, 2013. (Reuters/Chris Kidd/Pool)
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Land continues to burn in Tasmania where blazes last weekend destroyed 90 homes and 20,000 hectares of farm land and forest.
Officials on the island are still unsure of the fate of 100 people who went missing since last week, after fires destroyed the town of Dunalley.
In the current terrifying conditions, fires can become so hot that they create their own lightning storms, which can in turn ignite more fires, and ember showers can fly up to 15 miles ahead of a fire, igniting new fires in areas not yet alight. Experts warn that the intense heat being generated by the fires can kill people before the flames even reach them.
The conditions hark back to Black Saturday in the state of Victoria in 2009, when 172 people were killed by fires. This time emergency services are not taking any risks and have already closed national parks, ordered tourists out of campsites and are following the movements of known arsonists.
“We are at a catastrophic level and clearly in those areas leaving early is your safest option,” New South Wales Rural Fire Service Commissioner Shane Fitzsimmons said.
The Australian Prime Minister, Julia Gillard, said that it is important for people to keep themselves safe and listen to local authorities and their warnings.  She also stressed that the fires were being called catastrophic for a reason.
The Bega Valley is one of the areas authorities are most worried about, where fast moving scrub and grass fires are threatening homes.
Properties were under threat in the city of Wagga Wagga where the local highway has been closed. The Southern Ranges, the Riverina and Shoalhaven have also been given a catastrophic rating.
The heat, wind and dryness – ideal conditions for wildfires – follow a record four months of dry weather, allowing mere smoldering stumps and embers from areas already burned to blow into unburnt country.
However, the BoM is predicting cooler conditions to arrive across NSW by Wednesday morning.
This undated handout picture provided by New South Wales Rural Fire Service (NSW Rural Fire Service) on January 8, 2013 shows smoke billowing as a bushfire burns near Green Point in New South Wales. (AFP Photo/ NSW Rural Fire Service)
This undated handout picture provided by New South Wales Rural Fire Service (NSW Rural Fire Service) on January 8, 2013 shows smoke billowing as a bushfire burns near Green Point in New South Wales. (AFP Photo/ NSW Rural Fire Service)
This undated handout aerial picture provided by New South Wales Rural Fire Service (NSW Rural Fire Service) on January 8, 2013 shows a bushfire burning 8km south west of Naradhan, north of Griffith in New South Wales.  (AFP Photo/ NSW Rural Fire Service)
This undated handout aerial picture provided by New South Wales Rural Fire Service (NSW Rural Fire Service) on January 8, 2013 shows a bushfire burning 8km south west of Naradhan, north of Griffith in New South Wales. (AFP Photo/ NSW Rural Fire Service)
Smoke rises from the Yarrabin bushfire, burning out of control near Cooma, about 100km (62 miles) south of Canberra January 8, 2013. (Reuters/Tim Wimborne)
Smoke rises from the Yarrabin bushfire, burning out of control near Cooma, about 100km (62 miles) south of Canberra January 8, 2013. (Reuters/Tim Wimborne)
This aerial photograph taken on January 5, 2013 shows the devastation to property between Dunalley and Boomer Bay after bush fires swept through the area. (AFP Photo/Pool/Chris Kidd)
This aerial photograph taken on January 5, 2013 shows the devastation to property between Dunalley and Boomer Bay after bush fires swept through the area. (AFP Photo/Pool/Chris Kidd)

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