“地表能量平衡”框架如何量化城市下垫面对热岛的贡献？
How does the surface energy balance framework quantify the contribution of urban surfaces to the heat island?
该框架将净辐射拆分为感热、潜热、土壤热通量与储热项。城市因反照率降低、蒸散减少，使更多能量转为感热与储热，潜热减少，导致近地升温。遥感地表温度结合通量观测可定量分离各分量贡献。
The framework splits net radiation into sensible, latent, soil, and storage fluxes. Cities, with lower albedo and less evapotranspiration, shift more energy into sensible heat and storage and less into latent heat, warming the surface. Remote-sensing land temperature with flux towers quantifies each component's contribution.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
周淑贞 束炯,《气象学与气候学》第3版,高等教育出版社,1997
Zhou Shuzhen and Shu Jiong, Meteorology and Climatology, 3rd ed., Higher Education Press, 1997
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787040060164（豆瓣书目条目: 气象学与气候学）
#能量平衡 #感热 #潜热
城市冠层（urban canopy layer）与城市边界层（UBL）在热岛形成中扮演什么不同角色？
What different roles do the urban canopy layer and the urban boundary layer play in heat-island formation?
城市冠层是街道峡谷内的近地空气层，受建筑几何与局地湍流主导，决定行人尺度的热感；城市边界层是覆盖整个城市的混合层，受区域环流与天气控制，决定城市尺度热异常的范围与强度。两者时空尺度不同，需分别建模。
The urban canopy layer is the near-ground air within street canyons, governed by building geometry and local turbulence, shaping pedestrian-scale heat. The urban boundary layer is the mixed layer over the whole city, controlled by regional circulation and weather, setting the extent and intensity of the city-scale anomaly. They differ in scale and need separate modeling.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
《自然·地球科学》(Nature Geoscience) 城市气象研究
Nature Geoscience, urban meteorology
#城市冠层 #城市边界层 #湍流
高楼越密风越大吗?建筑峡谷里的风其实遵循什么规律?
Do denser skyscrapers mean stronger wind? What law governs wind inside urban canyons?
答案分高度段。高空几十至几百米处,粗糙的城市地表使风速比平原显著降低,但气流被迫抬升绕行,高层建筑顶部与转角出现加速区——这就是为什么摩天楼门口常设雨棚却仍有人被突袭的阵风吹乱。街谷内部则是另一套逻辑:垂直涡旋在峡谷里滚动,地面行人高度的风速反而可能只有上空的零头;当街道走向与主导风向接近垂直时形成螺旋涡,污染物滞留;平行时则产生狭管效应,局部风速被放大。城市规划用风洞与CFD模拟优化楼群朝向与架空层,正是为了驯服这两种极端。
It depends on height. Aloft, rough city surfaces cut wind speeds versus open plains, yet deflected flow accelerates over rooftops and around corners — hence lobbies with canopies still ambush pedestrians with gusts. Street level runs different physics: vortices roll inside canyons, and pedestrian-level wind can be a fraction of rooftop speed; when streets lie near-perpendicular to prevailing winds a helical vortex traps pollutants, while parallel alignment funnels jet-like acceleration. Planners tame both extremes with wind tunnels and CFD, tuning building orientation and podium voids.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Britter 与 Hanna,《Flow and dispersion in urban areas»,Annual Review of Fluid Mechanics 第35卷,2003
R. E. Britter and S. R. Hanna, Flow and dispersion in urban areas, Annual Review of Fluid Mechanics 35, 2003
#街谷风环境 #狭管效应 #CFD模拟
什么是“雨岛效应”？城市为何有时降水比周围多？
What is the rain island effect, and why might cities receive more precipitation than surroundings?
雨岛效应指城市及其下风向降水偏多的现象。城市粗糙表面增强湍流与上升运动、热岛提供不稳定能量、气溶胶充当凝结核，均可促进对流性降水，使城区及下风向雨量略增。
The rain-island effect is when cities and their downwind areas get more rainfall. Rough urban surfaces enhance turbulence and uplift, the heat island adds instability, and aerosols act as nuclei—all promoting convective precipitation and slightly raising city and downwind totals.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
周淑贞 束炯,《气象学与气候学》第3版,高等教育出版社,1997
Zhou Shuzhen and Shu Jiong, Meteorology and Climatology, 3rd ed., Higher Education Press, 1997
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787040060164（豆瓣书目条目: 气象学与气候学）
#雨岛效应 #城市湍流 #凝结核
为什么城市热岛在夜间比白天更明显？
Why is the urban heat island often more pronounced at night than during the day?
白天城乡都受强太阳辐射，温差被掩盖；夜间郊区因植被与土壤快速辐射降温，而城市建筑路面白天储存的热量缓慢释放、且天空视野受限阻碍散热，使城区维持较高温度，热岛强度因此夜间最大。
By day both city and country receive strong solar heating, masking the difference; at night suburbs cool rapidly by radiation, while urban fabric slowly releases stored heat and limited sky view hampers cooling, keeping the city warm. The heat-island intensity thus peaks at night.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
周淑贞 束炯,《气象学与气候学》第3版,高等教育出版社,1997
Zhou Shuzhen and Shu Jiong, Meteorology and Climatology, 3rd ed., Higher Education Press, 1997
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787040060164（豆瓣书目条目: 气象学与气候学）
#夜间热岛 #辐射冷却 #蓄热
城市通风廊道是如何缓解热岛的？
How do urban ventilation corridors help mitigate the heat island?
通风廊道是利用城市中的河流、绿地、道路等线性开敞空间，引导盛行风穿过建成区，带走热量与污染物。合理规划廊道可增强空气交换、降低峰值气温，是许多城市气候规划的核心手段。
Ventilation corridors use linear open spaces—rivers, green belts, roads—to channel prevailing winds through built-up areas, carrying away heat and pollutants. Well-planned corridors enhance air exchange and lower peak temperatures, a core tool in urban climate planning.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Britter 与 Hanna,《Flow and dispersion in urban areas»,Annual Review of Fluid Mechanics 第35卷,2003
R. E. Britter and S. R. Hanna, Flow and dispersion in urban areas, Annual Review of Fluid Mechanics 35, 2003
#通风廊道 #城市风 #气候规划
什么是城市热岛效应（UHI）？其主要成因有哪些？
What is the urban heat island effect, and what are its main causes?
城市热岛指城区气温明显高于周边郊区的现象。成因包括建筑与路面高蓄热、植被减少削弱蒸散降温、人为热排放以及峡谷形态阻碍散热。夜间尤为显著，可达数摄氏度之差。
The urban heat island is when city temperatures markedly exceed surrounding suburbs. Causes include heat-storing buildings and pavements, less vegetation reducing evaporative cooling, anthropogenic heat release, and canyon geometry trapping heat. It is strongest at night, differing by several degrees.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
周淑贞 束炯,《气象学与气候学》第3版,高等教育出版社,1997
Zhou Shuzhen and Shu Jiong, Meteorology and Climatology, 3rd ed., Higher Education Press, 1997
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787040060164（豆瓣书目条目: 气象学与气候学）
#城市热岛 #蒸散 #人为热
增加城市绿地和“冷屋面”为何能降温？
Why do more urban greenery and cool roofs lower temperature?
绿地通过植物蒸散消耗热量并为遮荫，降低周边气温；冷屋面采用高反照率材料反射太阳辐射、减少吸热，降低屋面与近地温度。两者都是缓解热岛的低成本的适应性措施。
Greenery cools via plant evapotranspiration and shade; cool roofs use high-albedo materials to reflect solar radiation and absorb less heat, lowering roof and near-surface temperatures. Both are low-cost adaptive measures against the heat island.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
美国环保局（EPA）《城市热岛缓解》报告
U.S. EPA, Reducing Urban Heat Islands report
#冷屋面 #绿地 #反照率