海洋生物泵随变暖减弱的机制是什么？
How does the ocean biological pump weaken as it warms?
表层升温加强层化、抑制营养盐上涌，浮游植物生长受限；同时呼吸与分解在深层相对增强，使下沉颗粒碳通量减少，封存的碳变少。
Surface warming strengthens stratification, curbing nutrient upwelling and phytoplankton growth, while respiration gains relatively, reducing sinking particulate carbon flux and less sequestration.
难度 专业 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#生物泵 #层化 #营养盐
雪和冰的“反照率反馈”如何放大北极变暖（极地放大）？
How does snow/ice albedo feedback amplify Arctic warming (polar amplification)?
暖化使冰雪融化，露出颜色更深的海面和陆地，吸收更多阳光，进一步升温并融化更多冰雪，形成自我强化的回路，使北极增温快于全球平均。
Warming melts bright ice, exposing darker ocean and land that absorb more sunlight, raising temperature and melting more ice—a self-reinforcing loop making the Arctic warm faster than the global mean.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#反照率 #极地放大 #冰雪
亚马逊雨林是否存在变成一个“ tipping point”转向稀树草原的风险？
Is there a tipping-point risk of the Amazon flipping to savanna?
模型与观测提示，当毁林与干旱叠加使雨林失去自身造雨能力，可能越过临界点退化为更干旱的稀树草原，碳储与区域气候都将改变。
Models and observations suggest deforestation plus drought can strip the forest of its rain-making ability, crossing a threshold to drier savanna, altering carbon stores and regional climate.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#亚马逊 #临界点 #雨林
永冻土解冻释放 CO2 和甲烷会形成什么样的反馈？
What kind of feedback does thawing permafrost releasing CO2 and methane create?
暖化使冻土融化、封存的有机碳被微生物分解放出温室气体，进一步加剧暖化，形成“正反馈”；这种释放大多未被现有排放清单计入。
Warming thaws permafrost, microbes decompose stored organic carbon into greenhouse gases that warm further—a positive feedback largely uncounted in current emission inventories.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#永冻土 #正反馈 #甲烷
“气候变暖→森林火灾变多→释放碳”属于哪种循环？
Is 'warming → more forest fires → carbon release' a kind of loop?
这是一个正反馈循环：升温让林区更干、火更频，燃烧把储存的碳送回大气，进一步推高温度，可能让森林从碳汇转为碳源。
It is a positive feedback loop: warming dries forests and sparks more fires, burning releases stored carbon that raises temperature further, potentially flipping forests from sink to source.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#野火 #正反馈 #碳源