Global warming will soon resume, scientists say

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Global warming will soon resume, scientists say
A woman sunbathes on the beach in Brighton on July 18, 2014, as parts of the country were expected to experience the hottest day of the year so far and the Met Office issued a heatwave alert for southern England and the Midlands. AFP PHOTO / CARL COURT (Photo credit should read CARL COURT/AFP/Getty Images)
National Oceanic and Atmospheric Administration and NASA both agree that 2014 is the hottest year on record ever. Matt Sampson has the details.
A woman sunbathes in central London on July 18, 2014 as parts of the country were expected to experience the hottest day of the year so far and the Met Office issued a heatwave alert for southern England and the Midlands. AFP PHOTO/BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)
People gather on the beach in Brighton on July 18, 2014, as parts of the country were expected to experience the hottest day of the year so far and the Met Office issued a heatwave alert for southern England and the Midlands. AFP PHOTO / CARL COURT (Photo credit should read CARL COURT/AFP/Getty Images)
Fishermen choose a picturesque spot to cast their lines from the rocks at Seal Beach, California, as the sun prepares to set on June 28, 2014. Summer in California this year is expected to be the hottest and driest on record as nearly one-third of the state experiences 'exceptional' drought levels, the highest percentage ever recorded by the Drought Monitor, whch began monitoring in 2000, according to reports last week from the National Climatic Data Center. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
A life guard keeps watch on the beach in Brighton on July 18, 2014, as parts of the country were expected to experience the hottest day of the year so far and the Met Office issued a heatwave alert for southern England and the Midlands. AFP PHOTO / CARL COURT (Photo credit should read CARL COURT/AFP/Getty Images)
A couple rest in the heat of the day in Sydney on January 6, 2015. Australia experienced its third-hottest year on record in 2014, paving the way for an early start to the bushfire season, scientists said on January 6 as hundreds of firefighters battled blazes in three states. AFP PHOTO / Peter PARKS (Photo credit should read PETER PARKS/AFP/Getty Images)
SYDNEY, AUSTRALIA - MAY 23: A general view of swimmers at Bondi Icebergs on May 23, 2014 in Sydney, Australia. Sydney is experiencing it's hottest May on record, already recording it's hottest week for this time of year in over 150 years. (Photo by Ryan Pierse/Getty Images)
SYDNEY, AUSTRALIA - MAY 23: A general view of swimmers at Bronte Beach on May 23, 2014 in Sydney, Australia. Sydney is experiencing it's hottest May on record, already recording it's hottest week for this time of year in over 150 years. (Photo by Ryan Pierse/Getty Images)
SYDNEY, AUSTRALIA - MAY 23: A general view of sunbathers at Bondi Beach on May 23, 2014 in Sydney, Australia. Sydney is experiencing it's hottest May on record, already recording it's hottest week for this time of year in over 150 years. (Photo by Ryan Pierse/Getty Images)
SYDNEY, AUSTRALIA - MAY 23: A general view of Bronte Beach on May 23, 2014 in Sydney, Australia. Sydney is experiencing it's hottest May on record, already recording it's hottest week for this time of year in over 150 years. (Photo by Ryan Pierse/Getty Images)
SYDNEY, AUSTRALIA - MAY 23: Children play in a pond on May 23, 2014 in Sydney, Australia. Sydney is experiencing it's hottest May on record, already recording it's hottest week for this time of year in over 150 years. (Photo by Ryan Pierse/Getty Images)
A fisherman sleeps on his boat as children swim behind him in a river to beat the summer heat in Manila on May 26, 2014. The Philippines has been experiencing the hottest days of the year with temperatures of 35 degrees Celsius (95 Fahrenheit) recorded in parts of the city. AFP PHOTO / NOEL CELIS (Photo credit should read NOEL CELIS/AFP/Getty Images)
(NOAA)
(NOAA)
Sunspots (shown in white) vary across multi-year cycles, causing solar irradiance, which influences the Earth's climate, to also fluctuate.
Solar irradiance from sun spots (shown in white) was high at the turn of the century. It led climatologists to believe temperatures would keep rising.
High levels of irradiance from the sun spots (shown in white) continued through about 2001.
This chart shows dramatic spikes in solar irradiance across the 1980s and 1990s before leveling off for the previous 14 years.
The sun spots then all but vanished around the beginning of 2002 and have yet to return. Scientists believe that when they do, global warming will also resume.
This image provided by NASA shows a 'Blue Marble' image of the Earth taken from the The Visible/Infrared Imager Radiometer Suite or VIIRS instrument aboard NASA's most recently launched Earth-observing satellite - Suomi NPP. This composite image uses a number of swaths of the Earth's surface taken on Jan. 4, 2012. The NPP satellite was renamed 'Suomi NPP' on Jan. 24, 2012 to honor the late Verner E. Suomi of the University of Wisconsin. Suomi NPP is NASA's next Earth-observing research satellite. It is the first of a new generation of satellites that will observe many facets of our changing Earth. Suomi NPP is carrying five instruments on board. (AP Photo/NASA)
Volcanic eruptions, like this one August 13 at Mount Etna on the southern Italian island of Sicily near Catania, have also contributed to the slow down in global warming buy launching particulates into the air that further diluted the sun's rays.
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By RYAN GORMAN

A new study has scientists concerned that the recent slowing of global warming is only temporary and that temperatures are poised to resume dramatically rising.

Researchers cited lower-than-expected sun irradiance and fluctuations in the El Niño/La Niña cycles in the Pacific Ocean for the departure, but found both are expected to soon return to expected levels.

Researchers from ETH Zurich found that longer than normal solar cycles have led to lower than expected temperatures as a result of a weaker sun, according to the results of the study published in Science Daily.

Sun irradiance greatly affects the Earth's climate. It has been lower since the turn of the century than climate change models expected, partially explaining the lack of rising temperatures.

Sun spot cycles previously lasted 11 years but have, for an unknown reason, lasted 13 years during a period of weak irradiance. A number of volcanic eruptions have also launched significant amounts pollution into the air, further diluting the sun's effects on the planet, the study found.

Also possibly playing a role are the El Niño warming and La Niña cooling cycles in the Pacific Ocean, according to the team.

"1998 was a strong El Niño year, which is why it was so warm that year," said Reto Knutti, Professor of Climate Physics at ETH Zurich.

Significant gains in global warming science were made at the end of the last century, and many predictions were based on upward trending temperatures during the 1990s.

Knutti explained that the models did not take a strong La Niña in recent years coupled with lower sun irradiance joining forces to keep temperatures stable into account.

This combination is only a speed bump in the climate change steamroller.The models look deep into the future and do not account for these fluctuations.

"Short-term climate fluctuations can easily be explained," said Knutti. "They do not alter the fact that the climate will become considerably warmer in the long term as a result of greenhouse gas emissions."

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