基于完整目录数据的全球海啸时空分异研究

海啸是自然灾害中对人类生命财产安全有严重威胁的灾难之一。随着全球气候变化和全球化贸易日益增强，越来越多的人口和经济暴露于海啸灾害。历史海啸灾害的时空分异分析可以帮助我们认识海啸灾害的演变规律，为灾害预警、灾害防控等提供有益参考。本文通过提取具有完整性和同质性的数据（爬高高度（RH））进行全球海啸的时空分异规律研究，结果表明:（1）对于0.1 m≤RH<0.5 m、0.5 m≤RH<1 m、1 m≤RH<5 m、5 m≤RH<10 m、10 m≤RH<20 m和20 m≤RH的间隔，海啸目录分别自1963年、1940年、1950年、1946年、1922年和1885年以来可以被认为是完整的；（2）全球海啸发生有一定的增加趋势，大约每年会多观测到7次波浪爬高事件。在0.1 m≤RH<5 m区间内，海啸发生呈现一定的周期性。当RH大于5 m时，表现出明显的增加趋势；（3）西北太平洋区域、南太平洋区域、东南太平洋区域、印度洋区域海啸发生有一定的增加趋势，而在北美区域则呈减少趋势，东北大西洋区域无显著变化；（4）除北美区域外，其他区域的海啸发生遵循一定的自组织临界行为，相比来说，东北大西洋区域更容易发生小的海啸事件，而西北太平洋区域和印度洋区域更容易发生各种强度的海啸事件。

Research on temporal and spatial variations of global tsunami based on complete catalog data

Tsunami is one of the disasters that seriously endanger the safety of human life and property among natural disasters. In the context of global warming and increasing economic development, more and more people, infrastructure and wealth are exposed to tsunami disasters, greatly increasing the risk and vulnerability of personal and property safety in coastal and delta areas. The analysis of temporal and spatial variation of historical tsunami disasters can help us understand the evolutionary laws of tsunami disasters, and provides a useful reference for more accurate disaster warning, disaster prevention and control, etc. A study on the temporal and spatial variation of global tsunami by extracting complete and homogeneous data is conducted in this paper. The results show that: (1) for 0.1 m≤RH<0.5 m, 0.5 m≤RH<1 m, 1 m≤RH<5 m, 5 m≤RH<10 m, 10 m≤RH<20 m and 20 m≤RH intervals, the tsunami catalogues can be considered complete since 1963, 1940, 1950, 1946, 1922 and 1885 respectively; (2) from time changes it can be seen that there is a certain increasing trend in the occurrence of global tsunamis. Approximately 7 more wave runup events are observed every year. At the same time, in different intensity intervals, the frequency of tsunamis has different changes. In the intervals of 0.1 m≤RH<0.5 m, 0.5 m≤RH<1 m, and 1 m≤RH<5 m, the tsunami have a certain periodicity, showing two obvious peaks, but when the RH is greater than 5 m, the periodicity of the tsunami is no longer obvious, and it shows a clear increasing trend at this time; (3) there is a certain increasing trend in the occurrence of tsunamis in East Asia, South Pacific, South America, and Indian Ocean. However, in North America, there is a decreasing trend, and there is no significant change in Europe; (4) except for North America, tsunami events in other regions show a good power law distribution relationship, indicating that the occurrence of tsunamis follows certain self-organized critical behavior. In comparison, small tsunami events are more likely to occur in Europe, while tsunami events in East Asia and the Indian Ocean are more prone to various types of tsunami events, of which large tsunami events occupy a larger portion.