GENEVA: The past seven years have been the hottest on record, the United Nations confirmed on Wednesday, adding that 2021 temperatures remained high despite the cooling effect of the La Nina weather phenomenon.

“The warmest seven years have all been since 2015,” the UN’s World Meteorological Organisation said in a statement.

And despite the fact that two consecutive La Nina events captured global attention for large portions of the year, 2021 still ranked among the seven warmest years on record, the WMO said.

“Back-to-back La Nina events mean that 2021 warming was relatively less pronounced compared to recent years. Even so, 2021 was still warmer than previous years influenced by La Nina,” WMO chief Petteri Taalas said in the statement.

This, he said, shows that “the overall long-term warming as a result of greenhouse gas increases is now far larger than the year-to-year variability in global average temperatures caused by naturally occurring climate drivers.” La Nina refers to the large-scale cooling of surface temperatures in the central and eastern equatorial Pacific Ocean, with widespread impacts on weather around the world.

The phenomenon, which typically has the opposite impacts as the warming El Nino phenomenon, usually occurs every two to seven years, but has now hit twice since 2020.

WMO reached its conclusions by consolidating six leading international datasets, including the European Union’s Copernicus climate monitor (C3S) and the US National Oceanic and Atmos­pheric Administration (NOAA), which announced similar findings last week.

The datasets showed that the average global temperature in 2021 was around 1.11 degrees Celsius above the pre-industrial levels measured between 1850 and 1900.

‘Record-shattering temperature’

Last year also marked the seventh consecutive year that global temperatures were more than 1C above pre-industrial levels, the datasets showed.

“The global average temperature in 2021 is already approaching the lower limit of temperature increase the Paris Agreement seeks to avert,” the WMO warned. The 2015 Paris Agreement saw countries agree to cap global warming at “well below” 2C above pre-industrial levels, and 1.5C if possible.

The WMO stressed that the unbroken warm streak over the past seven years was part of a longer-term trend towards higher global temperatures. “Since the 1980s, each decade has been warmer than the previous one,” it said.

“This is expected to continue.” The datasets varied slightly in their assessment of where 2021 ranked among the seven warmest years, with C3S ranking it fifth, NOAA ranking it sixth, and others saying it was seventh.

“The small differences among these datasets indicates the margin of error for calculating the average global temperature,” the WMO said.

But while 2021 was among the coolest of the top-seven hottest years, it was still marked by a range of record temperatures and extreme weather events linked to global warming.

Published in Dawn, January 20th, 2022

Opinion

Editorial

Disregarding CCI
Updated 04 Nov, 2024

Disregarding CCI

The failure to regularly convene CCI meetings means that the process of democratic decision-making is falling apart.
Defeating TB
04 Nov, 2024

Defeating TB

CONSIDERING the fact that Pakistan has the fifth highest burden of tuberculosis in the world as per the World Health...
Ceasefire charade
Updated 04 Nov, 2024

Ceasefire charade

The US talks of peace, while simultaneously arming and funding their Israeli allies, are doomed to fail, and are little more than a charade.
Concerning measures
Updated 03 Nov, 2024

Concerning measures

The govt must seek political input and consensus on the changes it is seeking to make and be open about its intentions.
Short-lived relief?
03 Nov, 2024

Short-lived relief?

POLICYMAKERS must be jumping with joy. At the close of the first quarter of FY25, the budget posted a consolidated...
Brisk spread
03 Nov, 2024

Brisk spread

THE surge in polio cases has reached distressing levels with a tally of 45 last reported, after two cases emerged in...