厄尔尼诺为什么会让秘鲁沿岸的渔场减产？
Why does El Niño reduce fish catches off Peru?
正常年份秘鲁沿岸有上升流把海底营养带上来了，养活大量鱼类；厄尔尼诺时东风减弱、暖水覆盖表层，上升流停滞，营养减少，鱼群随之减少。
Normally coastal upwelling brings nutrient-rich deep water to Peru, feeding fish; during El Niño weakened winds let warm water cap the surface, halting upwelling, so nutrients and fish decline.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
周淑贞 束炯,《气象学与气候学》第3版,高等教育出版社,1997
Zhou Shuzhen and Shu Jiong, Meteorology and Climatology, 3rd ed., Higher Education Press, 1997
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787040060164（豆瓣书目条目: 气象学与气候学）
#上升流 #渔场
拉尼娜和厄尔尼诺有什么相反的表现？
How is La Niña the opposite of El Niño?
拉尼娜时赤道东风比常年更强，西太平洋暖水更集中、东太平洋更冷，上升流增强，天气异常的方向往往与厄尔尼诺相反。
In La Niña the trade winds are stronger than usual, warm water piles further west and the east cools with enhanced upwelling, so weather anomalies tend to oppose those of El Niño.
难度 进阶 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
周淑贞 束炯,《气象学与气候学》第3版,高等教育出版社,1997
Zhou Shuzhen and Shu Jiong, Meteorology and Climatology, 3rd ed., Higher Education Press, 1997
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787040060164（豆瓣书目条目: 气象学与气候学）
#拉尼娜 #东风增强
什么是厄尔尼诺现象？为什么说海洋与大气之间的正反馈能让一次暖事件维持数月之久？
What is El Nino, and why does a coupled ocean-atmosphere positive feedback let one warm event persist for months?
厄尔尼诺指赤道中东太平洋海表持续异常增暖，与大气南方涛动合称ENSO。信风减弱后，赤道上升流和东侧冷水上翻随之减弱，暖水向东扩展推高中东部海温；海温升高又削弱沃克环流、进一步放松信风，这一相互放大的比耶克尼斯正反馈让暖状态自我维持。其后海洋波动调整改变相位，暖事件衰减乃至转为拉尼娜，并借遥相关扰动全球降水与气温。
El Nino denotes a large-scale, persistent anomalous warming of sea surface temperatures across the equatorial central and eastern Pacific, paired with the atmospheric Southern Oscillation in the ENSO cycle. Once the trade winds slacken, equatorial upwelling and the surfacing of cold eastern water weaken, letting warm water spread east and raising central-eastern sea temperatures; the warmer ocean then relaxes the Walker circulation and loosens the trades further. This mutually amplifying Bjerknes feedback sustains the warm state until oceanic wave adjustment shifts the phase toward decay or La Nina, while teleconnections perturb global rainfall and temperature.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Timmermann, A. 等，《El Niño–Southern Oscillation complexity》，Nature 第559卷535–545页，2018年，DOI: 10.1038/s41586-018-0252-6
Timmermann, A. et al., El Niño–Southern Oscillation complexity, Nature, vol. 559, pp. 535–545, 2018, DOI: 10.1038/s41586-018-0252-6
独立核验依据 · Independent verification: 核验依据 1 EUROPEPMC 标识 30046070：El Niño-Southern Oscillation compl
#厄尔尼诺 #南方涛动 #比耶克尼斯反馈
厄尔尼诺和拉尼娜为什么常常影响半个地球的天气？
Why do El Niño and La Niña often affect weather across half the globe?
它们改变了热带太平洋的海温格局，进而挪动大气环流和急流位置，通过“遥相关”把影响传到很远的地方，引起别处干旱或暴雨。
They reshape tropical Pacific sea-surface temperatures, shifting atmospheric circulation and jet streams, and via 'teleconnections' send impacts far away, causing droughts or floods elsewhere.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
周淑贞 束炯,《气象学与气候学》第3版,高等教育出版社,1997
Zhou Shuzhen and Shu Jiong, Meteorology and Climatology, 3rd ed., Higher Education Press, 1997
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787040060164（豆瓣书目条目: 气象学与气候学）
#遥相关 #海温
厄尔尼诺一般隔几年闹一次？
Roughly how often does an El Niño occur?
厄尔尼诺没有固定日历，通常每隔两到七年出现一次，每次可能持续几个月到一年多。
El Niño has no fixed schedule; it typically appears every two to seven years and can last from several months to over a year.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
周淑贞 束炯,《气象学与气候学》第3版,高等教育出版社,1997
Zhou Shuzhen and Shu Jiong, Meteorology and Climatology, 3rd ed., Higher Education Press, 1997
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787040060164（豆瓣书目条目: 气象学与气候学）
#周期 #厄尔尼诺