2023-10-12 ニューサウスウェールズ大学(UNSW)
◆これは、気象条件の変化により、ひょうのリスクが変動し、これに対処するために都市計画や農業において強靭なインフラを構築する必要があることを示唆しています。また、気候変動があられ嵐に与える影響についても検討されています。
＜関連情報＞
- https://newsroom.unsw.edu.au/news/science-tech/likelihood-hail-australia-has-changed-substantially-over-last-four-decades
- https://www.nature.com/articles/s41612-023-00454-8
オーストラリア全土における雹災害の変化 1979-2021 Changes in hail hazard across Australia: 1979–2021
Timothy H. Raupach,Joshua S. Soderholm,Robert A. Warren & Steven C. Sherwood
npj Climate and Atmospheric Science Published:19 September 2023
DOI:https://doi.org/10.1038/s41612-023-00454-8
Abstract
Hail damage is a leading cause of insured losses in Australia, but changes in this hazard have not been robustly quantified. Here, we provide a continental-scale analysis of changes in hail hazard in Australia. A hail proxy applied to reanalysis data shows that from 1979–2021 annual hail-prone days decreased over much of Australia but increased in some heavily populated areas. For example, the annual number of hail-prone days increased by ~40% around Sydney and Perth, the largest cities on Australia’s east and west coasts, respectively. Changes in atmospheric instability have driven the trends. Radar observations, while covering shorter time spans and a more limited area than the reanalysis, corroborate the broad pattern of results. This study shows consistent hail-frequency trends in radar indicators and atmospheric environments and demonstrates substantial increases in hail frequency in major Australian cities where hail impacts are most significant.
