低频风应力强迫减弱数值模式中厄尔尼诺多样性

doi:10.11978/2022038

热带海洋学报 ›› 2023, Vol. 42 ›› Issue (1): 1-9.doi: 10.11978/2022038CSTR: 32234.14.2022038

所属专题：全球变化专题

• 海洋气象学 • 下一篇

低频风应力强迫减弱数值模式中厄尔尼诺多样性

张琪¹(), 连涛¹^,²^,³()

1.自然资源部第二海洋研究所, 杭州浙江 310000
2.上海交通大学, 上海 200000
3.南方海洋科学与工程广东省实验室(珠海), 珠海广东 519000

收稿日期:2022-02-24 修回日期:2022-04-08 出版日期:2023-01-10 发布日期:2022-04-21

Low-frequency wind stress forcing reduces El Niño diversity in numerical model

ZHANG Qi¹(), LIAN Tao¹^,²^,³()

1. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310000, China
2. School of Oceanography, Shanghai Jiao Tong University, Shanghai 200000, China
3. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China

Received:2022-02-24 Revised:2022-04-08 Online:2023-01-10 Published:2022-04-21
Contact: LIAN Tao. email: liantao@sio.org.cn
About author:
ZHANG Qi (1997—), male, master student. email: zghydxzq@163.com
Supported by:
National Natural Science Foundation of China(42022043); Zhejiang Provincial Natural Science Foundation of China(LR19D060001)

摘要/Abstract

摘要：

厄尔尼诺-南方涛动(El Niño-Southern Oscillation, ENSO)包括低频海-气耦合和高频过程, 但 ENSO 动力学中的非线性阻碍了两者对 ENSO 发展贡献的定量分析。最近的一项工作提出了在线低通滤波技术, 通过去除模型中海-气耦合过程中风应力的高频部分, 从而研究低频海-气相互作用对ENSO动力学的影响。本文通过比较使用和不使用在线低通滤波模块的模式, 发现去除高频风力后会延长 ENSO 的周期, 并降低厄尔尼诺现象的多样性, 这证实了高频过程在厄尔尼诺多样性的成因中起着至关重要的作用。

关键词: 耦合模式, 在线低通滤波, 厄尔尼诺-南方涛动

Abstract:

The El Niño-Southern Oscillation (ENSO) includes both low-frequency ocean-atmosphere coupling and high-frequency processes, yet the nonlinearity in ENSO dynamics prevents any quantitative estimation of the contributions of the two to ENSO development. The online low-frequency filtering technique was proposed in a recent work to exclude the high-frequency part of wind stress during ocean-atmosphere coupling in model, thus can be used to scale the impact of low-frequency ocean-atmosphere interaction on the ENSO dynamics. By comparing model simulations with and without the online low-pass filtering module, we found that removing the high-frequency wind forcing prolongs ENSO period and decreases El Niño diversity. The results confirm that the high-frequency momentum processes play a crucial role in the genesis of El Niño diversity.

Key words: coupling model, online low-frequency filtering, ENSO

张琪, 连涛. 低频风应力强迫减弱数值模式中厄尔尼诺多样性[J]. 热带海洋学报, 2023, 42(1): 1-9.

ZHANG Qi, LIAN Tao. Low-frequency wind stress forcing reduces El Niño diversity in numerical model[J]. Journal of Tropical Oceanography, 2023, 42(1): 1-9.

图/表 7

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低频风应力强迫减弱数值模式中厄尔尼诺多样性

Low-frequency wind stress forcing reduces El Niño diversity in numerical model

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