Contrary to the media reports, there was no ‘heat wave’ in Antarctica since the official meteorological criteria for one was not met.
A variety of mainstream media outlets claim Antarctica is burning up, registering unusually hot temperatures due to climate change, citing a recent study as the source for their stories. The stories misrepresent the study’s findings and the science. [emphasis, links added]
The peer-reviewed paper that the headlines reference clearly states that a short-term weather event was the cause, not climate change.
Also, contrary to media claims, there was no “heat wave,” since the official meteorological criteria for calling this event a heat wave was not met.
The photo above shows the headline of SciTechDaily: Earth’s Last Frontier Burns: Record-Breaking Heat Strikes Antarctica in Winter.
Elsewhere, The Economic Times weighed in with Antarctica’s record heat wave: A threat to global sea levels and ice integrity, while CNN blared ‘Astonishing’ Antarctica heat wave sends temperatures 50 degrees above normal.
First, let’s refute the obvious. As is clear in the photo with the SciTechDaily headline above, nothing was burning in Antarctica despite the claim of a “continent afire.”
SciTechDaily says this:
In March 2022, the most intense heat wave ever recorded on Earth hit Antarctica, just as organisms in the southern region braced themselves for the long, harsh winter ahead.
The extreme weather raised temperatures in parts of Antarctica to more than 70°F above average, melting glaciers and snow even in the McMurdo Dry Valleys, one of the planet’s coldest and driest regions.
Putting that paragraph and those headlines in the proper perspective, we turn to the definition of a heat wave from the National Oceanic and Atmospheric Administration (NOAA):
A heat wave is a period of unusually hot weather that typically lasts two or more days. To be considered a heat wave, the temperatures have to be outside the historical averages for a given area.
While there were fewer colder-than-normal temperatures in Antarctica during a one-day weather event, the temperature only briefly went above freezing, so there was no measurable melting. The practice of applying a “heat wave” label to such an event is erroneous.
The paper the media referred to as the source of their alarming headlines says, “Record high temperatures were documented in the McMurdo Dry Valleys, Antarctica, on 18 March 2022, exceeding average temperatures for that day by nearly 30°C.”
Further, the data they provide in the form of Figure 1 shows the temperature in several locations in Antarctica:
Figure 1 (a) Map of the McMurdo Dry Valleys, Antarctica, and (b) the location of meteorological stations where air temperature was recorded at Lake Bonney, Lake Hoare, Lake Fryxell, the Friis Hills, and Lake Vanda. March 2022 temperature spikes circled in red by A. Watts. Source article: Response of a Terrestrial Polar Ecosystem to the March 2022 Antarctic Weather Anomaly
As you can see in the temperature graphs on the right side of Figure 1(b) in March 2022, there were brief temperature spikes for one day (circled in red), where the freezing temperature of 0°C (32°F) was approached or exceeded.
After that, temperatures immediately returned to normal for the area.
So in the context of NOAA’s heat wave definition above, the two-day minimum criteria were not met, so referring to the brief temperature spike as a “heat wave” was erroneous or fake news.
The peer-reviewed paper said the cause of the event was, “[a]n atmospheric river caused extreme weather in the Antarctic Dry Valleys in March 2022 with temperatures 25°C above average conditions.”
Even the title of the peer-reviewed paper, “Response of a Terrestrial Polar Ecosystem to the March 2022 Antarctic Weather Anomaly,” calls it a weather anomaly.
A single-day weather event that briefly caused temperatures to go above normal doesn’t meet the meteorological definition of a heat wave or a signal of climate change since it is not indicative of a long-term 30-year trend of temperatures on the continent.
Despite these scientific facts, the mainstream media outlets reporting the event described it variously as “[a] threat to global sea levels and ice integrity,” an “astonishing heat wave,” and a “burning continent of Antarctica” in the eyes of the media.
The level of exaggeration, to use CNN’s word, is astonishing.
The “news reporting” on this study and the weather anomaly it discussed is all too typical of the effort by media organizations to blame every weather event that falls even slightly outside the norm, no matter how brief, as caused by climate change – even when the underlying research makes no such connection.
Weather is not climate. They operate on completely different time scales.
This sort of reporting is unprofessional, and a disgusting disservice to the public who the media is supposed to inform, not mislead and indoctrinate.
Top photo by Rod Long on Unsplash
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