An analysis of geopotential fields in the Northern and Southern hemispheres under different natural climatic conditions during January

Introduction. Atmospheric pressure is a crucial characteristic of the atmosphere. Changes in atmospheric pressure lead to changes in the entire set of weather conditions. The increase in global temperature affects all atmospheric characteristics, including atmospheric pressure. This paper examines the changes in atmospheric pressure near the Earth’s surface during the stabilization period and the second wave of global warming. Theoretical analysis. Based on the data on the height of the isobaric surface H0 (AT 1000 hPa), the average long-term fields of atmospheric pressure distribution on the globe during the stabilization period and during the second wave of global warming were constructed. The NCER/NCAR reanalysis data were used as the initial data. To assess the change in the fields, the difference in geopotential heights H0 in hPa was calculated by subtracting the average long-term field during the second wave of global warming from the average long-term field during the stabilization period. Conclusion. There are areas where the sea-level pressure in January was higher than during the stabilization period in the second wave. These areas are located in the eastern hemisphere, between the 120th and 150th meridians. The pressure decreased in the area of the Icelandic Low, the Canadian Archipelago, and along the coast of Antarctica, which is washed by the Indian Ocean.