2010年至2020年期间,在南大西洋发生了爆炸性旋风,在两个检测计划的视角下
Hugo N Andrade1, Mário Francisco L DE Quadro2, André B Nunes3
1Universidade Federal do Rio Grande, Instituto de Oceanografia, Avenida Itália, Km 8, 96203-900 Rio Grande, RS, Brazil.
Anais da Academia Brasileira de Ciencias
|September 11, 2024
概括
这项研究使用两种方法分析了南大西洋的爆炸性旋风,确定了299个爆炸性事件,并揭示了季节性分布模式. 这些破坏性的天气系统根据季节表现出不同的地理偏好.
科学领域:
- 气象学和大气科学 气象学和大气科学
- 海洋学 海洋学 海洋学
背景情况:
- 爆炸性旋风是具有重大破坏潜力的严重天气现象.
- 了解它们的频率和分布对于气候研究和灾难准备至关重要.
- 南大西洋地区是研究这些强烈天气系统的关键区域.
研究的目的:
- 分析2010年至2020年南大西洋爆炸性气旋的情况.
- 为了比较两种不同的旋风检测和分析方法:观测方法 (OBSM) 和自动化方法 (AUTM).
- 为了确定爆炸性气旋发生的季节性和地理模式.
主要方法:
- 观察方法 (OBSM) 涉及使用GrADS软件对平均海平面压力 (mslp) 场进行视觉分析.
- 自动化方法 (AUTM) 使用OpenGrADS函数 (mfhilo) 和shell算法进行旋风检测,轨迹跟踪和分类.
- 这两种方法都旨在确定局部压力最小值,表明旋风的发展.
主要成果:
- OBSM确定了271起爆炸性气旋事件,平均每年25起,并提供了有关其强度的见解.
- 在2705个普通气旋中,AUTM检测到299个爆炸性气旋.
- 观察到一个明显的季节性模式,气旋在夏季集中在高度,在冬季和春季集中在巴西和乌拉圭海岸附近.
结论:
- 在南大西洋,OBSM和AUTM都成功地识别和描述了爆炸性旋风.
- 与OBSM相比,AUTM提供了一个更突出的季节性分布模式.
- 爆炸性旋风在南美沿海发生时表现出显著的季节性和地理变化.
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