北方赤道电流和超级台风的快速加剧
Sok Kuh Kang1, Sung-Hun Kim2, I-I Lin3
1Korea Institute of Ocean Science & Technology, Busan, Korea. skkang@kiost.ac.kr.
Nature communications
|March 7, 2024
概括
超级台风曼克胡特 (Mangkhut) 是一个超级台风.
科学领域:
- 海洋学 海洋学 海洋学
- 气象学 天气学
- 气候科学 气候科学
背景情况:
- 超级台风Mangkhut是5级热带气旋 (TC),在西北太平洋地区表现出前所未有的强度和持续时间.
- 北方赤道电流 (NEC) 地区在历史上被认为不太有利于快速强化 (RI) 与埃迪富区相比.
- 了解驱动TC强度的因素对于预测极端天气事件至关重要.
研究的目的:
- 确定导致超级台风迅速加剧的关键海洋因素.
- 重新评估北方赤道电流 (NEC) 地区在超级台风发展中的作用.
- 研究海洋热量含量 (OHC) 和分层对热带气旋强度的影响.
主要方法:
- 分析海洋学数据,包括海洋热量含量 (OHC) 和热线深度.
- 检查与热带气旋 (TC) 轨迹,强度和持续时间有关的气象数据.
- 海洋状况与超级台风曼克胡特快速强化 (RI) 阶段的相关性.
主要成果:
- 北方赤道电流 (NEC) 地区的特点是海洋热量含量高 (OHC) 和分层增加,被确定为超级台风快速强化 (RI) 最有利的地区.
- 在NEC地区的高OHC是北向加深的热流线的结果,受西向流动的NEC的影响.
- 由热带融合区间降水带来的分层增加,通过减少海面冷却,进一步增强了超级台风的强度.
结论:
- 由于高OHC和分层,NEC地区是超级台风RI的关键区域,挑战了关于Eddy Rich区域的先前假设.
- 这些海洋条件在过去几十年中得到了放大,大大阻碍了海面的冷却,从而促进了TC的快速加剧和维持超级台风的强度.
- 这些发现凸显了将这些海洋因素纳入未来热带气旋强度预测模型的必要性.
相关概念视频
General External Flow Characteristics
162
The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...
162
Primary Production
23.6K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
23.6K
Rapidly Varying Flow
62
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
62
Coriolis Force
3.4K
An accelerating particle experiences a force equal to the mass multiplied by the acceleration in an inertial frame of reference. Consider a particle in a non-inertial frame of reference, such as a sliding ball on a rotating table. The acceleration of the ball in this rotating reference frame is different than in the intertial frame, which modifies its equation of motion. The fictitious forces acting additionally on a rotating frame of reference alter Newton's Second Law expression.
3.4K
Power System Three-Phase Short Circuits
84
Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
84
Intensity Of Electromagnetic Waves
4.5K
The energy transport per unit area per unit time, or the Poynting vector, gives the energy flux of an electromagnetic wave at any specific time. For a plane electromagnetic wave with E0 and B0 as the peak electric and magnetic fields and traveling along the x-axis, the time-varying energy flux can be given by the following equation:
4.5K


