什么是复合极端事件，为何比单一灾害更难应对？
What are compound extreme events, and why are they harder to manage than single hazards?
复合事件指多个极端（如高温叠加干旱、风暴潮叠加强降雨）在空间或时间上并发或相继，产生非线性放大的影响。传统基于单灾种的预警与防御体系难以覆盖其协同效应，因此风险更高。
Compound events occur when multiple extremes, such as heatwaves with drought, or storm surge with heavy rain, co-occur or follow one another, producing nonlinearly amplified impacts. Conventional single-hazard early-warning and defense systems poorly capture their combined effects, raising risk.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#复合极端 #灾害风险 #非线性
海底地震海啸预警系统如何在分钟级别发出警报？
How do submarine-earthquake tsunami warning systems issue alerts within minutes?
系统利用近海地震台网快速测定震源位置、震级与断层类型，并结合海平面浮标实时检测海啸波，推算到达沿岸的时间与高度。由于海啸波速远低于地震波，可为远处海岸争取宝贵的疏散时间。
The system uses offshore seismic networks to rapidly determine epicenter, magnitude, and fault type, and sea-level buoys to detect tsunami waves in real time, estimating arrival time and height at coasts. Because tsunami waves travel far slower than seismic waves, distant shores gain valuable evacuation time.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#海啸预警 #地震台网 #浮标
为什么强震过后多年,震区斜坡上的滑坡仍频繁发生?
Why do slopes in a seismic region keep failing with landslides for years after a strong earthquake?
强震动使斜坡岩体开裂、松动并累积损伤,形成大量震裂斜坡,其完整性远差于震前。震后降雨沿裂隙入渗,孔隙水压力升高、岩体抗剪强度继续衰减,失稳所需雨量阈值明显降低。汶川震区的观测显示,震后约十年内滑坡对降雨的敏感度仍显著高于震前水平。
Strong shaking cracks, loosens, and damages slope-forming rock masses, leaving co-seismically fractured slopes far less intact than before the event. Rainfall then infiltrates along the new fissures, raising pore-water pressures and further degrading shear strength, so the rainfall threshold for failure drops sharply. Observations in the Wenchuan seismic zone show that landslide sensitivity to rain stayed markedly above pre-earthquake levels for roughly a decade.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：作者 / 书名 / 版次 / 出版社 / 年份齐备，仅缺独立比对证据；已在可信度报告单列披露，不再重复核验。
殷跃平《汶川地震地质与滑坡灾害概论》,地质出版社,2009 ; 另见: Huang & Fan, The landslide story, Nature Geoscience, 2013
Huang & Fan, The landslide story, Nature Geoscience, 2013 ; see also: 殷跃平《汶川地震地质与滑坡灾害概论》,地质出版社,2009
#边坡稳定 #地震触发
持续干旱如何增加沙尘暴发生的频率？
How does prolonged drought increase the frequency of dust storms?
干旱使土壤与植被覆盖下降、地表松散，强风更易卷起沙尘形成沙尘暴，并可能远距离传输影响空气质量与冰雪反照率。这是干旱半干旱区典型的灾害链。
Drought reduces soil moisture and vegetation cover, leaving loose surfaces that strong winds easily lift into dust storms, which can travel far and affect air quality and snow or ice albedo. This is a classic hazard chain in arid and semi-arid regions.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#干旱 #沙尘暴 #灾害链
强烈地震为何常引发连锁滑坡灾害？
Why do strong earthquakes often trigger chains of landslide disasters?
地震震动使斜坡岩土体瞬间失稳，尤其在陡坡、松散堆积和降雨条件下大量滑坡集中发生，堵塞河道形成堰塞湖，后续溃决又引发洪水。这种地震—滑坡—堰塞湖—溃决的链条放大了单一灾害损失。
Ground shaking destabilizes slope materials instantly, triggering clustered landslides on steep, loose, or rain-saturated terrain; they can dam rivers into landslide lakes whose later breach causes floods. This earthquake-landslide-dam-breach chain amplifies the loss from a single hazard.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#地震滑坡 #堰塞湖 #灾害链
大型火山喷发如何影响随后一两年的全球气候？
How can a large volcanic eruption affect global climate over the following year or two?
喷发将二氧化硫送入平流层形成硫酸盐气溶胶，反射太阳辐射使地表降温约0.1至0.5℃，并可能扰动季风与降水。1991年皮纳图博火山即造成全球平均气温短暂下降约0.5℃。
Eruptions inject sulfur dioxide into the stratosphere, forming sulfate aerosols that reflect sunlight and cool the surface by about 0.1 to 0.5°C while perturbing monsoons and rainfall. The 1991 Pinatubo eruption briefly lowered global mean temperature by about 0.5°C.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#火山气候 #硫酸盐气溶胶 #皮纳图博
现代自然灾害预警系统一般依赖哪些环节？
What components does a modern natural-disaster early-warning system generally rely on?
典型系统包括实时监测网络（地震台、气象雷达、水位站）、数据传输与模型预测、以及面向公众的发布与响应机制。缩短「预警到行动」的时间差是降低伤亡的关键。
A typical system includes real-time monitoring networks (seismic stations, weather radar, water-level gauges), data transmission and model forecasting, and public alerting and response protocols. Shortening the warning-to-action gap is key to reducing casualties.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#早期预警 #监测网络 #应急响应
台风为何会在沿岸引发危险的风暴潮？
Why do typhoons drive dangerous storm surges along the coast?
台风的强风和低压使海面异常抬升，叠加天文大潮时海水倒灌淹没低洼海岸，是最具破坏力的致灾因素之一。预警依赖风暴路径、气压与海底地形耦合的潮位模型。
A typhoon's strong winds and low pressure raise the sea surface anomalously; combined with astronomical high tide, seawater floods low-lying coasts and becomes one of the most destructive factors. Warning relies on tide models coupling storm track, pressure, and bathymetry.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#风暴潮 #台风 #潮位模型
为什么一场强震过后,山区滑坡灾害往往会在此后许多年里持续高发?
Why do landslides stay unusually frequent in mountain regions for years after a major earthquake?
强烈的地面运动使坡体内裂隙扩展、岩土体松动,斜坡整体强度大幅下降。震后降雨极易沿这些损伤面入渗,触发新的崩塌滑坡,堆积在沟谷中的松散物质又为泥石流提供了充足物源。对汶川震区十余年的监测显示,区域滑坡活动水平大约需要十年才逐步回落到震前状态。
Strong shaking opens cracks and loosens rock and soil within slopes, sharply lowering the overall strength of hillsides. Rainfall after the quake infiltrates easily along these damaged surfaces and triggers fresh slides, while debris shed into gullies feeds years of post-seismic debris flows. More than a decade of monitoring in the Wenchuan earthquake zone shows that regional landslide activity took roughly ten years to decay back toward pre-earthquake levels.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Fan Xian(樊茜)等,《地震诱发地质灾害链:模式、机制与影响》,Reviews of Geophysics,2019年,第57卷第2期,421-503页
Fan, X. et al. (2019). Earthquake-induced chains of geologic hazards: patterns, mechanisms, and impacts. Reviews of Geophysics, 57(2), 421-503.
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1029/2018rg000626：Earthquake‐Induced Chai
#地质灾害 #震后链生滑坡