首页|期刊导航|大气和海洋科学快报(英文版)|3D DBSCAN detection and parameter sensitivity of the 2022 Yangtze river summertime heatwave and drought
大气和海洋科学快报(英文版)2023,Vol.16Issue(4):15-21,7.DOI:10.1016/j.aosl.2022.100324
3D DBSCAN detection and parameter sensitivity of the 2022 Yangtze river summertime heatwave and drought
3D DBSCAN detection and parameter sensitivity of the 2022 Yangtze river summertime heatwave and drought
摘要
Abstract
极端气候事件的精准识别是机理分析的重要前提.本研究借助无监督机器学习中经典的DBSCAN密度聚类算法,发展了在三维(经度-纬度-时间)空间内进行目标事件识别和参数敏感性分析的研究方案.在2022年长江全域高温伏秋旱事件识别中的应用表明,本次天气尺度极端热浪和季节尺度重旱事件的产生发展,空间传播模式不同.天气尺度热浪信号自6月底从北太平洋向西南方向延伸,直至8月中旬覆盖长江全域;季节重旱信号于7月中旬从孟加拉湾陆面区域向东北向延伸,直至9月中旬覆盖长江全域.同时,本研究中亦进行了相关参数敏感性的详细分析,对算法应用,结果理解亦有帮助.关键词
DBSCAN算法/复合气候极值事件/高温干旱/长江流域/机器学习Key words
DBSCAN/Compound climate extremes/Heatwave and drought/Yangtze River/Machine learning引用本文复制引用
Zhenchen Liu,Wen Zhou,Yuan Yuan..3D DBSCAN detection and parameter sensitivity of the 2022 Yangtze river summertime heatwave and drought[J].大气和海洋科学快报(英文版),2023,16(4):15-21,7.基金项目
This work was supported by the National Key R&D Program of China[grant number 2022YFC3002801],a key project of the National Nat-ural Science Foundation of China[grant numbers 42120104001 and 42192563],a project of the Center for Ocean Research in Hong Kong and Macau(CORE),and the National Natural Science Foundation of China for Youth[grant number 42205191]. (CORE)