The independently - funded group used new modelling to look at the odds
of extreme heat events occurring, with and without man - made emissions.
Due to global warming, the
most extreme heat events now impact a global area 10 times greater than in the period 1951 - 1980.
The virtually certain impacts include increasing temperatures, more
frequent extreme heat events, changes in the distribution of rainfall, rising seas, and the oceans becoming more acidic.
An increase in
extreme heat events around the globe is observed and expected to be one of the first apparent symptoms of global warming.
The nearby rural areas experienced no change over the same period, remaining at five
extreme heat event days per year.
Other studies have shown that climate change increases the odds
of extreme heat events and may make them warmer and longer lasting.
«Our study explains why cities suffer even more
during extreme heat events and highlights the heat risks that urban residents face now and in the projected future.»
Based on our research, we collaborated with Ahmedabad's city agencies to develop South Asia's first Heat Action Plan in 2013, a comprehensive early - warning system and preparedness plan
for extreme heat events.
Claudia Tebaldi, visiting scientist at the US National Centre for Atmospheric Research, and Michael Wehner, senior staff scientist at the Lawrence Berkeley National Laboratory, report in Climatic Change journal that stringent emissions reductions could reduce the risk of
such extreme heat events.
It is also widely agreed that the world has seen a spate of
extreme heat events in recent years, such as the 2011 Texas heat wave and drought and the deadly 2010 heat wave in Russia, and that global warming made some of these events more likely to occur and more severe.
Researchers looked at heat waves and longer -
lasting extreme heat events in Korea, Australia, Argentina, Europe and warm ocean temperatures in parts of the Pacific and Atlantic.
Beyond the long - term record, the past five years have been punctuated
by extreme heat events around the globe, the most recent being an
If temperatures rise globally by 2 C (3.6 F)- a goal that has been deemed utterly inadequate - we expect twice as
many extreme heat events worldwide than we would with a 1.5 C increase.
«If temperatures rise globally by 2 °C, we would expect twice as many
extreme heat events worldwide than we would with a 1.5 % increase,» Dr Fischer says.
An as yet unpublished paper by NASA climatologist James Hansen and others makes the case that
recent extreme heat events, such as Russia's 2010 deadly heatwave and last year's extreme drought in Texas, are directly linked to our warming planet.
With temperature records being smashed month after month, year after year, it's likely that human - caused global warming is
making extreme heat events more frequent.
But, even so, by 2075, an estimated 18 % of the Earth's surface could still experience those once -
rare extreme heat events every year.
A new study for the first time found links between the rapid loss of snow and sea ice cover in the Arctic and a recent spate of
exceptional extreme heat events in North America, Europe, and Asia.
However, it does not impact the main result of Hansen et al., that global warming has
caused extreme heat events to occur more frequently and to be more intense on average.
The National Integrated Heat Health Information System
names extreme heat events as one of the leading weather - related causes of death in the United States.
«Our study explains why cities suffer even more
during extreme heat events and highlights the heat risks that urban residents face now and in the projected future.»
AHMEDABAD (March 11, 2014)-- Building off of last year's successful launch of South Asia's first - ever early warning system and preparedness plan
for extreme heat events, the Indian city of Ahmedabad, along with the Indian Institute of Public Health, Gandhinagar and partners, is developing the 2014 Heat Action Plan to continue its pioneering efforts.
Climate forecasts indicate that the Southern High Plains will become drier with more
frequent extreme heat events and decreased precipitation.
Beyond the long - term record, the past five years have been punctuated
by extreme heat events around the globe, the most recent being an extreme heat wave in India this summer that left 2,500 dead.
Masters who calls the heatwave «one of the
most extreme heat events in U.S. history,» recently commented, «this is not the atmosphere I grew up with.»
Evidence indicates that the human influence on climate has already roughly doubled the probability
of extreme heat events such as the record - breaking summer heat experienced in 2011 in Texas and Oklahoma.
«Rather striking» climate link to Australian heat waves Because temperature extremes are easier to decipher, scientists are fairly confident that global warming increased the severity and likelihood of
extreme heat events in 2013 in Australia, New Zealand, South Korea, Japan, China and Europe.
They defined any day with a maximum temperature at or above 35 ˚C as an «
extreme heat event» and made projections of the likely number of people exposed to extreme heat between 2041 and 2070.
A new analysis shows that there is «virtually no explanation other than climate change» for
extreme heat events, including last year's scorching weather in Texas and Oklahoma
The work «dissects the phenomena better than previous studies,» showing the anatomy and evolution of
the extreme heat events, he adds.
Researchers observed a 23 % increase in risk of asthma hospitalizations when there was
an extreme heat event during summer months.
The researchers suggest that
extreme heat events during summer months may lead to higher concentration of harmful air pollutants such as ozone, which is known to exacerbate asthma.
In the Gulf,
extreme heat events that stress corals beyond their tolerance are becoming increasingly common and have led to significant population reduction (7).
The elderly and the very young are especially vulnerable to
extreme heat events, which are poised to become more frequent and intense (ClimateWire, June 14).
They found the number of «
extreme heat event» days in the city had risen threefold from about four in 1980 to nearly 12 in 2013.
«This level of detail in real time can provide specific information to agencies tasked with protecting our citizenry during
extreme heat events,» Snyder said.