为什么冬季北方易发“静稳天气”加重雾霾？
Why do calm, stable winter conditions worsen haze in northern China?
冬季地面冷却快、逆温层像“盖子”抑制垂直扩散，加上低风速，污染物在近地面积累。采暖燃煤与静稳气象叠加，PM2.5浓度骤升。
In winter the surface cools fast and an inversion layer acts like a lid suppressing vertical mixing; with low wind, pollutants accumulate near ground. Heating coal plus stagnant weather spikes PM2.5.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
生态环境部,《中国生态环境状况公报》年度发布
Ministry of Ecology and Environment, annual state-of-environment bulletin
#大气治理 #逆温 #雾霾
什么是“大气边界层”及其对污染治理的意义？
What is the atmospheric boundary layer and why does it matter for pollution control?
边界层是紧贴地面、受地表摩擦与热力直接影响的最低层大气，其高度日变化大。白天高、夜间低（稳定层结）时污染物更易累积，因此预报与管控需结合边界层结构。
The boundary layer is the lowest atmosphere directly shaped by surface friction and heating; its height varies diurnally. It is tall by day but low and stable at night, trapping pollutants—so forecasting and control must account for its structure.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
Oke,《Boundary Layer Climates》第2版,Routledge,1987
T. R. Oke, Boundary Layer Climates, 2nd ed., Routledge, 1987
独立核验依据 · Independent verification: 核验依据 1 ISBN 9780203715451 (1987)
#大气治理 #边界层 #扩散
什么是“超低排放”改造，主要针对什么污染物？
What is 'ultra-low emission' retrofitting, and which pollutants does it target?
它是对燃煤电厂等加装高效除尘器、脱硫、脱硝设施，使颗粒物、二氧化硫、氮氧化物排放浓度降至极低水平，显著改善空气质量。
It adds high-efficiency dust collectors, desulfurization and denitrification to plants like coal power, cutting PM, SO2 and NOx to very low levels and markedly improving air quality.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
生态环境部,《中国生态环境状况公报》年度发布
Ministry of Ecology and Environment, annual state-of-environment bulletin
#大气治理 #超低排放 #电厂