What is it about?
Changes of atmospheric concentration of greenhouse gases, particularly of carbon dioxide, cause climatic changes not only in the lower atmosphere but also in the upper atmosphere. This paper is overview of progress in studying climatic changes/long-term trends in the upper atmosphere over the period 2017-2022.
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Why is it important?
Long-term changes in the neutral upper atmosphere reduce its density, which reduces drag of dangerous space debris and thus enhances their number on satellite orbits. This results in more collisions damaging satellites (particularly telecommunication satellites). Long-term changes of ionized component, the ionosphere, have some impact on GPS signal propagation and applications as e.g. positioning.
Perspectives
This publication summarizes progress and state-of-the-art and serves as background for further investigations in area of climatic changes in the upper atmosphere.
Dr Jan Lastovicka
Institute of Atmospheric Physics ASCR
Read the Original
This page is a summary of: Progress in investigating long-term trends in the mesosphere, thermosphere, and ionosphere, Atmospheric Chemistry and Physics", May 2023, Copernicus GmbH,
DOI: 10.5194/acp-23-5783-2023.
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