为什么全球海平面上升速度各地不一样，有的地方反而下降？
Why does sea level rise differ by region, and even fall in some places?
除了全球总量变化，还有地壳回弹、洋流改道、重力变化（失去冰盖后陆地“弹起”、对海水的引力改变）等，使某些沿岸海平面反而下降或上升更快。
Beyond the global total, factors like crustal rebound, shifting currents, and gravity changes (lost ice reduces its pull on nearby water, while land rises) make some coasts fall or rise faster than the average.
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
#区域差异 #地壳回弹
过去一个世纪全球海平面大约上升了多少？
About how much has global sea level risen over the past century?
20 世纪以来全球平均海平面已上升约 20 多厘米，且近几十年的速度明显加快，目前约每年 3 到 4 毫米。
Since 1900 the global mean sea level has risen about 20-plus centimeters, and the rate has accelerated recently to roughly 3–4 mm per year.
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
#上升趋势 #速率
海平面上升的两大原因分别是什么？
What are the two main causes of sea-level rise?
一是海水变暖体积膨胀（热膨胀），二是冰川和冰盖融化把原本锁在陆地上的水送回海洋，两者共同抬升海平面。
One is thermal expansion as warming water expands; the other is meltwater from glaciers and ice sheets returning land-locked water to the ocean. Both raise sea level.
难度 进阶 · 适合 小学高段(9-12)
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
#海平面 #热膨胀
海水变热为什么会让海平面升高？
Why does warmer seawater raise sea level?
水一受热就会胀大，占的地方变多，虽然每滴只胀一点点，但整片大洋加起来，海平面就慢慢升高了。
Water expands when heated, taking up more space; each drop swells a little, but across the whole ocean it adds up and lifts sea level.
难度 入门 · 适合 幼儿(3-6)
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
#热膨胀 #升温