什么是“降尺度”（downscaling），为何区域影响评估需要它？
What is downscaling and why do regional impact assessments need it?
全球模式分辨率粗（百公里级），无法直接给城市尺度气候。降尺度用统计或动力方法把大尺度结果细化到局地，以评估极端事件、海平面与农业的地域影响。
Global models are coarse (hundreds of km) and can't directly give city-scale climate. Downscaling refines large-scale results to local detail—statistically or dynamically—to assess regional extremes, sea level and agriculture.
难度 专业 · 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
#气候模型 #降尺度 #区域
为什么不同气候模型给出的升温幅度会有区间（如2.5–4°C）？
Why do different climate models produce a range of warming (e.g., 2.5–4°C)?
差异主要来自“气候敏感度”——云、气溶胶等反馈过程在模式中参数化近似不同。再加上排放情景不确定，集合多模型（CMIP）给出的是概率区间而非单一数字。
Differences mainly stem from climate sensitivity—feedbacks like clouds and aerosols are approximated differently across models. Combined with scenario uncertainty, the multi-model ensemble (CMIP) yields a probabilistic range, not a single number.
难度 专业 · 适合 高中(15-18)
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
#气候模型 #敏感度 #不确定性
气候模型（GCM/ESM）是怎样“算”出未来气候的？
How do climate models (GCM/ESM) 'compute' future climate?
模型把大气、海洋、陆面、海冰等分成三维网格，用物理方程（流体运动、辐射、相变等）在超级计算机上逐步积分。给定排放情景，它们模拟能量与物质输送，得出温度、降水等的长期变化。
Models divide the atmosphere, ocean, land and sea ice into a 3D grid and solve physical equations (fluid motion, radiation, phase changes) step by step on supercomputers. Given an emissions scenario, they simulate energy and mass transport to project temperature, precipitation and more.
难度 进阶 · 适合 初中(12-15)
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
#气候模型 #数值模拟
超级计算机怎么帮我们“看”未来的天气？
How do supercomputers help us 'see' future weather?
科学家把地球切成很多小方块，让电脑用算式推演风、云和温度怎么变，就像用很多积木拼出未来的样子。
Scientists split Earth into little boxes and let computers calculate how wind, clouds and temperature change—like building the future from many blocks.
难度 入门 · 适合 幼儿(3-6)
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
#气候模型 #科普