{"id":35040,"date":"2025-04-23T17:54:19","date_gmt":"2025-04-23T15:54:19","guid":{"rendered":"https:\/\/www.co2news.sk\/?p=35040"},"modified":"2025-04-23T17:54:58","modified_gmt":"2025-04-23T15:54:58","slug":"climate-change-is-now-affecting-the-earths-rotation","status":"publish","type":"post","link":"https:\/\/www.co2news.sk\/en\/2025\/04\/23\/climate-change-is-now-affecting-the-earths-rotation\/","title":{"rendered":"Climate change is now affecting the Earth's rotation"},"content":{"rendered":"

A document titled „Climate\u2010Induced Polar Motion: 1900\u20132100<\/span><\/a>„<\/em> by Mostafa Kiani Shahvandi and Benedikt Soju examines the impact of climate change, specifically barystatic processes, on the movement of the Earth's rotational axis relative to the crust, called polar motion. The authors examine this phenomenon over the period from 1900 to the end of 2100.<\/p>\n

\ud83c\udfaf Research objective<\/strong><\/p>\n

The main objective of the study is to examine how barystatic processes will affect polar motion in the 21st century under different climate scenarios.<\/strong>. Bariostatic processes include continental and oceanic mass redistribution caused by melting polar ice sheets (Greenland and Antarctica), global glaciers, and changes in terrestrial water storage (TWS). The paper builds on previous studies that have shown the increasing influence of mass redistribution at the Earth's surface on polar motion. Previous analysis of the impact of bariostatic processes was limited to the period 1900\u20132018, and the future contribution was not explored.<\/p>\n

\ud83d\udcca Climate scenarios used<\/strong><\/p>\n

The study analyses climate-induced polar motion under different climate scenarios, namely Representative Concentration Pathways (RCP) and Shared Socioeconomic Pathways (SSP). For overall barystatic processes, the study analyses scenarios in detail RCP2.6 (optimistic) and RCP8.5 (pessimistic)<\/strong>, because they represent the approximate lower and upper limits of climate change in the 21st century, and thus provide a range of possible paths of the Earth's rotational axis under the influence of these processes.<\/p>\n

\u2699\ufe0f Research methodology<\/strong><\/p>\n

The study methodology uses data from two periods: 1900\u20132018 and 2019\u20132100. For the earlier period, the results of a previous study based on changes in the mass of ice sheets, glaciers and TWS are adopted, which explain most of the observed polar motion. For the later period (2019\u20132100), polar motion is calculated using the sea level equation on a rotating Earth and available projections for individual barystatic processes.<\/p>\n

\ud83e\uddca The projections include data for the Greenland and Antarctic ice sheets under RCP2.6 and RCP8.5, for global glaciers under multiple RCP and SSP scenarios, and for TWS under selected SSP scenarios. A multimodal ensemble approach is used for the Greenland and Antarctic ice sheets. For TWS, the average is made across the three SSP scenarios because they exhibit similar behavior and their impact is smaller than for other processes. However, it is important to note that the TWS projections may not capture all relevant components, such as quasi-decadal variability, and are less accurate than data from the period 1900\u20132018.<\/p>\n

\ud83d\udccc Main findings<\/strong><\/p>\n

Main findings show that climate-induced polar motion is sensitive to the choice of climate scenario<\/strong>:<\/p>\n