So how long have they been measuring?
The first continued measurements of the stratosphere were taken by Richard Scherhag in 1951 using radiosondes to take reliable temperature readings in the upper stratosphere (~40 km) and he became the first to observe stratospheric warming on 27 January 1952. After his discovery, he assembled a team of meteorologists specifically to study the stratosphere at the Free University of Berlin and this group continued to map the northern-hemisphere stratospheric temperature and geopotential height for many years using radiosondes and rocketsondes.
In 1979 when the satellite era began, meteorological measurements became far more frequent. Although satellites were primarily used for the troposphere they also recorded data for the stratosphere. Today both satellites and stratospheric radiosondes are used to take measurements of the stratosphere.
So yeah let’s extrapolate from where there’s a paucity of data 🤨
P. S. The vortex wandering is more likely to be due to solar/lunar influences.
Polar vortex [image credit: NASA]
Changing polar vortex patterns and wavy jetstreams – do they suggest solar magnetic changes as sunspots decline, or another 0.01% of trace gases in the atmosphere, or something else? Much scientific head-scratching, although research has been going on for a while.
It might seem counterintuitive, but the dreaded polar vortex is bringing its icy grip to parts of the U.S. thanks to a sudden blast of warm air in the Arctic, writes Seth Borenstein.
Get used to it. The polar vortex has been wandering more often in recent years.
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