That means that it is not warming or cooling fast enough. In most cases, the air mass is moving too fast to adjust its temperature to the surroundings. Such strong and persistent winds can transport a large mass of air in a very short time. Note the colder air over much of Canada and the United States. Warmer than normal air was already moving into the polar regions, and you can see the airflow arrows. Looking at the past few days, the ECMWF analysis shows the buildup of this event. That is the wind corridor between the high and low-pressure systems, driven by the pressure difference. You can see a stream wind from the far North Atlantic reaching into the Arctic Ocean. We can see a large wind field south of Greenland, as a strong low-pressure system passes there.īut our focus is on a wind corridor further to the northeast. The image below shows the 5-day wind forecast. It is contrasting against a very large high-pressure zone expanding from northern Europe into Siberia.Īnother (much weaker) pair of pressure systems can be found with the high-pressure over the western United States and low-pressure in the North Pacific.Īs we now know, the wind is the main force that is generated by the imbalance in pressure. It reveals a powerful low-pressure complex over the Canadian Arctic Archipelago and Greenland. The atmosphere always tries to balance out the pressure differences, which we can feel like the wind.īelow is a 3-day pressure anomaly forecast over the Polar circle. These temperature differences cause large pressure variations in the atmosphere, resulting in strong pressure systems around the world. It is being “imbalanced” by the large temperature differences around the world, from the equatorial to the polar regions. The atmosphere is constantly in motion and always trying to achieve a state of perfect balance or equilibrium. Image by Zack Labe.īut this graph is likely to receive a large spike in the coming days, as a strong anomalous pressure/wind event is unfolding over Greenland and the North Atlantic. This is the high-resolution analysis from ECMWF data, showing current temperatures being more normal in mid-April. We can better see how the warm polar regions translate to colder cub-polar regions.įocusing on the high North Pole, 2022 so far has been warmer than normal. Looking closer at the polar circle, we see most of the Arctic is experiencing warmer than normal temperatures this month so far. We can see that, as colder than normal temperatures can be found in most of Canada, most of west-central United States, and over parts of Europe and Siberia. As the warmer air moves into the polar regions, it usually means that colder air moves out. Looking first at the global temperature anomalies for March so far, we can see a large area of warmer than normal temperatures over the western Polar regions. Now, a strong movement of air is underway, creating unusual weather conditions both in and out of the Polar regions.Īs you will also see, one of the factors that even allows such strong anomalies is also the Gulf Stream and the entire Atlantic Ocean circulation (AMOC). Strong pressure systems in the sub-polar regions are creating a “wind tunnel” from the North Atlantic into the Polar Circle. Strong pressure systems are driving a large air mass transport event, bringing warmer than normal temperatures into the Polar regions. 2017(+0.A strong “heatwave” is developing in the Polar circle, with surface temperatures up to 30 degrees above the long-term average. Have risen at a rate of about 0.73☌ per century.ġst. On a longer time scale, global average surface temperatures Was +0.22☌ above the 1991-2020 average (+0.77☌ above the 20th century average), and was the 6th warmest since 1891. the average of the near-surface air temperature over land and the SST) The annual anomaly of the global average surface temperature in 2021 (i.e. In this page, the long-term changes of annual and monthly anomalies of the global average surface temperature are shown.Īnnual Anomalies of Global Average Surface Temperature (1891 - 2021) Select the Period -» JMA monitors the long-term change of the global average surface temperature anomalies for the purpose of monitoring the global warming. Home > Global Warming > Global Temperature Global Average Surface Temperature Anomalies
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