José Miguel Viñas
Meteorologist at Meteored at www.tiempo.com and consultant for the WMO (Spain)
The magnitude and frequency of warm anomalies occurring globally this year, both in the lower atmospheric air and in the surface water of the oceans, as well as some anomalous weather patterns observed, are attracting the attention of climate scientists. Extreme heat domes in different regions of the Earth, such as North America, southern Europe and northwest China, have led to extraordinary temperature records, with heat records being broken once again. It seems clear that this circumstance cannot be dissociated from global warming, but to prove it requires an attribution study, such as the one just published by the WWA (World Weather Attribution).
The objective of this type of study is to directly link a particular extreme weather event (or set of events, such as the heat domes this July) and climate change. They also have the added value of being able to be carried out quickly, providing the results just a few days after the extreme weather event. This latest WWA attribution study has shown that without global warming of mainly anthropogenic origin it would have been very unlikely (extremely rare in the case of China and virtually impossible in the cases of the USA/Mexico and southern Europe) that such simultaneous extreme heat domes would have occurred in the targeted land regions with the magnitude they have reached, leading to such extreme heat spikes.
In parallel to the appearance of this attribution study, the hypothesis that the extraordinary amount of water vapour that the violent eruption of the submarine volcano Hunga Tonga -occurring in the Pacific Ocean on 14 January 2022- launched into the stratosphere (even reaching the mesosphere) could explain, at least in part, the large warm anomalies that we are experiencing so far this year and that are falling short of the projections made last year, is beginning to gain strength among the scientific community.
In addition, as the El Niño event that began in late spring is expected to gain in intensity, it is also expected to contribute to the increase in global temperature.