2018 fourth warmest year on record: NASA, NOAA


Team Udayavani, Feb 7, 2019, 6:10 AM IST

New York: Earth’s global surface temperatures in 2018 were the fourth warmest since 1880, an independent analysis by NASA and the National Oceanic and Atmospheric Administration (NOAA) has found.

According to scientists at NASA’s Goddard Institute for Space Studies (GISS) here, global temperatures in 2018 were 0.83 degrees Celsius warmer than the 1951 to 1980 mean.

Globally, 2018’s temperatures rank behind those of 2016, 2017 and 2015. The past five years are, collectively, the warmest years in the modern record, NASA said in a statement.

NOAA’s analysis found 2018 global temperatures were 0.79 degrees Celsius above the 20th century average.

“2018 is yet again an extremely warm year on top of a long-term global warming trend, said GISS Director Gavin Schmidt.

Since the 1880s, the average global surface temperature has risen about one degree Celsius.

This warming has been driven in large part by increased emissions into the atmosphere of carbon dioxide and other greenhouse gases caused by human activities, according to Schmidt.

Weather dynamics often affect regional temperatures, so not every region on Earth experienced similar amounts of warming.

Warming trends are strongest in the Arctic region, where 2018 saw the continued loss of sea ice, NASA said.

In addition, mass loss from the Greenland and Antarctic ice sheets continued to contribute to sea level rise.

Increasing temperatures can also contribute to longer fire seasons and some extreme weather events, according to Schmidt.

“The impacts of long-term global warming are already being felt — in coastal flooding, heat waves, intense precipitation and ecosystem change,” said Schmidt.

NASA’s temperature analyses incorporate surface temperature measurements from 6,300 weather stations, ship- and buoy-based observations of sea surface temperatures, and temperature measurements from Antarctic research stations.

These raw measurements are analysed using an algorithm that considers the varied spacing of temperature stations around the globe and urban heat island effects that could skew the conclusions.

These calculations produce the global average temperature deviations from the baseline period of 1951 to 1980.

Since weather station locations and measurement practices change over time, the interpretation of specific year-to-year global mean temperature differences has some uncertainties.

NOAA scientists used much of the same raw temperature data, but with a different baseline period and different interpolation into the Earth’s polar and other data-poor regions.

Udayavani is now on Telegram. Click here to join our channel and stay updated with the latest news.

Top News

EC notifies by-polls for three Rajya Sabha seats from Andhra

Deputy CM Shivakumar hints about Cabinet reshuffle on cards in Karnataka

BJP to corner Congress govt in K’taka on Waqf issue, alleged scams, during legislature session

Section 52A of Waqf Act has no retrospective effect, says Kerala HC

Seeding car crashes into divider on highway in Mumbai; Two college students dead

NADA suspends Bajrang Punia for four years for violation of anti-doping code

Alphabet gets CCI’s clearance to acquire stake in Flipkart

Related Articles More

Will impose 25 per cent tariff on all imports from Canada, Mexico: Trump

Internal divisions leave open question whether Gandhi’s vision will ever be fully realised in India: Bill Clinton

COP29: India rejects new USD 300 billion climate finance deal

Royal tour of India in offing for King Charles, Queen Camilla: Report

Indian-American leaders applaud PM Modi for inclusive growth in India

MUST WATCH

Grafting

Coconut Flower

Prakash Belawadi

Naxal Leader Vikram Gowda

Christmas Cake Fruit Mixing


Latest Additions

EC notifies by-polls for three Rajya Sabha seats from Andhra

Geethartha Chinthane 106: Prioritize relieving grief, not amplifying it

Law should be brought in where Muslims don’t have voting power, says seer during Waqf protest

Moodbidri: Former physical education director P. Nemiraj Hegde passes away

Railways Minister responded positively to Konkan Railway merger proposal: Kota Srinivas Poojary

Thanks for visiting Udayavani

You seem to have an Ad Blocker on.
To continue reading, please turn it off or whitelist Udayavani.