大量冰川融水汇入海洋，可能怎样拖慢温盐环流？
How could large inputs of glacial meltwater slow thermohaline circulation?
融冰是淡水，会降低表层海水的盐度和密度，使本该下沉的水“太轻”而沉不下去，从而削弱北大西洋的翻涌，可能让环流减速甚至局部停滞。
Meltwater is fresh; it lowers surface salinity and density so the water can no longer sink, weakening North Atlantic overturning and potentially slowing or stalling the circulation.
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
#淡水 #环流减弱
什么是温盐环流，它为什么又被称为“全球传送带”？
What is thermohaline circulation, and why is it called the global conveyor belt?
温盐环流由海水的温度（热）和盐度（盐）差异造成密度差驱动：北大西洋冷水下沉，沿深海流向全球，再缓慢上升，完成一圈往往要上千年，像一条在海洋里循环几千年的传送带。
Thermohaline circulation is driven by density differences from temperature and salinity: cold dense water sinks in the North Atlantic, flows through the deep ocean worldwide, and slowly rises again, taking over a thousand years per loop—hence the 'global conveyor belt'.
难度 专业 · 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
#温盐环流 #密度驱动
温盐环流把一整圈海水循环一遍，大概要多少年？
Roughly how long does one full loop of thermohaline circulation take?
深海洋流流速很慢，完成一次全球深浅水交换大约需要一千到两千年。
Deep currents move very slowly; one full global exchange of deep and surface water takes roughly one to two thousand years.
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
#时间尺度 #深海流速
北大西洋深层水是怎么“变重”沉到海底的？
How does North Atlantic Deep Water become heavy enough to sink?
海水在寒冷地区被冷却，又因蒸发和结冰失去淡水使盐度升高，温度低、盐度高让海水更重，于是沉入深海。
In cold regions the water cools and loses fresh water through evaporation and ice formation, raising its salinity; colder and saltier water is denser, so it sinks.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
L. D. Talley et al., Descriptive Physical Oceanography, 6th ed., Academic Press, 2011
L. D. Talley et al., Descriptive Physical Oceanography, 6th ed., Academic Press, 2011
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL16003173W：Descriptive physical o
#深层水 #下沉