最近一次盛冰期大约在什么时候，那时海平面比现在低多少？
When was the last glacial maximum, and how much lower was sea level then?
末次盛冰期约在 2.1 万年前，大量水被锁在冰盖里，全球海平面比今天低约 120 米，许多现在的海峡和大陆架当时是干的陆地。
The last glacial maximum was about 21,000 years ago; with water locked in ice sheets, global sea level was roughly 120 meters lower than today, leaving many straits and shelves as dry land.
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
Wicander & Monroe,《Historical Geology》Cengage 多版
R. Wicander and J. S. Monroe, Historical Geology, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL79786W：Historical geology（按标题+作者
#末次盛冰期 #海平面
我们现在生活在冰期里还是冰期之间？
Are we living in an ice age or between ice ages?
我们正处在被称为“第四纪冰期”的一个温暖间歇（间冰期）里：两极仍有大冰盖，但相比冰盛期算是比较暖的阶段，这个间冰期已持续约一万年。
We are in a warm interglacial within the ongoing Quaternary ice age: polar ice sheets still exist, but it's a relatively warm phase that has lasted about 10,000 years.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Wicander & Monroe,《Historical Geology》Cengage 多版
R. Wicander and J. S. Monroe, Historical Geology, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL79786W：Historical geology（按标题+作者
#间冰期 #第四纪
米兰科维奇循环说的“三兄弟”是哪三个变化？
What are the 'three' changes in the Milankovitch cycles?
它们分别是地球轨道形状（偏心率，约 10 万年）、地轴倾斜角度（约 4 万年）和地轴指向的进动（约 2 万年）的缓慢周期变化，三者叠加塑造了冰期—间冰期节律。
They are slow cycles in orbital shape (eccentricity, ~100 kyr), axial tilt (obliquity, ~41 kyr), and wobble of Earth's spin axis (precession, ~21 kyr); together they set the ice-age rhythm.
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
Wicander & Monroe,《Historical Geology》Cengage 多版
R. Wicander and J. S. Monroe, Historical Geology, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL79786W：Historical geology（按标题+作者
#米兰科维奇 #周期
冰河时期为什么会一来一去，像地球的“呼吸”？
Why do ice ages come and go like Earth's 'breathing'?
地球绕太阳的轨道会发生很慢的变化（偏心率、地轴倾斜、岁差），改变了各地接收到的阳光，于是冰川就周期性地扩张和退缩。
Earth's orbit changes very slowly—eccentricity, axial tilt, and precession—altering the sunlight each region gets, so ice sheets expand and retreat in cycles.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Wicander & Monroe,《Historical Geology》Cengage 多版
R. Wicander and J. S. Monroe, Historical Geology, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL79786W：Historical geology（按标题+作者
#冰期 #轨道变化