Impact of different roofing mitigation strategies on near-surface temperature and energy consumption over the Chicago metropolitan area during a heatwave event

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 860, P. 160508 - 160508

Published: Nov. 28, 2022

This study examined the impact of cool roofs, green and solar panel roofs on near-surface temperature cooling energy demand through regional modeling in Chicago metropolitan area (CMA). The new parameterization based model physics has recently been developed, updated, coupled to a multilayer building that is fully integrated with Weather Research Forecasting model. We evaluate performance against observation measurements show our capable being suited tool simulate heatwave event. Next, we examine by characterizing air its diurnal cycle from experiments without different rooftops. also estimate rooftop urban island intensity (UHII), surface heat flux, boundary layer. Finally, measure rooftops citywide air-conditioning consumption. Results deployment roof can reduce most over areas, followed roof. experiment was only one where trended down as fraction increased, indicating effective mitigation strategy among these three options. For consumption, it be reduced 16.6 %, 14.0 7.6 when are deployed, respectively. Although smallest reduction if assume all electricity production applied demand, expect almost savings half (46.7 %) demand.

Language: Английский

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Residential segregation and outdoor urban moist heat stress disparities in the United States

One Earth, Journal Year: 2023, Volume and Issue: 6(6), P. 738 - 750

Published: June 1, 2023

The combined impact of urbanization-induced warming and drying on large-scale heat stress disparities remains unknown, with multicity studies using satellite-derived land surface temperature as a proxy for these disparities. Here, high-resolution urban-resolving numerical model simulations 2014–2018, we find pervasive in all-sky average maximum summertime air moist metrics across US cities, higher outdoor exposure poorer primarily non-white census tracts. Ninety-four percent the urban population (228 million) live cities where burdens poor, inequities between white populations strongly associated residential segregation. Similarly, historically redlined neighborhoods show than their non-redlined counterparts, demonstrating how historical segregation relates to present-day environmental inequalities. Our results provide quantitative estimates physiologically relevant at national scale highlight potential biases when satellites these.

Language: Английский

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Urbanization alters atmospheric dryness through land evapotranspiration

npj Climate and Atmospheric Science, Journal Year: 2023, Volume and Issue: 6(1)

Published: Sept. 23, 2023

Abstract ‘Urban Dry (Wet) Islands’ (UDI/UWI) represents microclimate change that impacts ecosystems and human well-being. However, causes of the UDI (UWI) phenomena are not fully understood due to lack empirical data. Here, we quantify using global observations atmospheric humidity, evapotranspiration (ET), land surface characteristics across 25 large urban agglomerations. We show (17) UWI (8) closely tied local ET, warming, Heat through intertwined linkages with water energy balances. is most pronounced in humid vegetated regions where mean urban-rural annual ET differences as high 215 mm, whereas found arid or climates dry summers. conclude can be used a single variable explain emerging environmental changes. Our study supports concerted strategy restoring nature’s power effective ‘Nature-based Solutions’ mitigate negative effects urbanization.

Language: Английский

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Continental United States climate projections based on thermodynamic modification of historical weather

Scientific Data, Journal Year: 2023, Volume and Issue: 10(1)

Published: Sept. 28, 2023

Regional climate models can be used to examine how past weather events might unfold under different conditions by simulating analogue versions of those with modified thermodynamic (i.e., warming signals). Here, we apply this approach dynamically downscaling a 40-year sequence from 1980-2019 driven atmospheric re-analysis, and then repeating total 8 times using range time-evolving signals that follow 4 80-year future trajectories 2020-2099. Warming two emission scenarios (SSP585 SSP245) are derived groups global based on whether they exhibit relatively high or low sensitivity. The resulting dataset, which contains 25 hourly over 200 3-hourly variables at 12 km spatial resolution, plausible in direct reference previously observed enables systematic exploration the ways change influences characteristics historical extreme events.

Language: Английский

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Configuration characteristics of green-blue spaces for efficient cooling in urban environments

Sustainable Cities and Society, Journal Year: 2023, Volume and Issue: 100, P. 105040 - 105040

Published: Nov. 6, 2023

Language: Английский

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Impacts of urbanization on air quality and the related health risks in a city with complex terrain

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(1), P. 771 - 788

Published: Jan. 17, 2023

Abstract. Urbanization affects air pollutants via urban expansion and emission growth, thereby inevitably changing the health risks involved with pollutants. However, related to urbanization are rarely estimated, especially for cities complex terrain. In this study, a highly urbanized city severe pollution terrain (Chengdu) is selected explore issue. The effects of further compared growth because quality management usually achieved by regulating anthropogenic emissions. Air in Chengdu was mainly caused PM2.5 O3 from 2015 2021. tended appear cold months (November February) owing blocking stable atmospheric layer, whereas likely occur warm (April August) that experience high-temperature strong-sunlight conditions dominated high-pressure systems. From 2021, 7-year annual average premature mortality all non-accidental causes (ANACs) due 9386 (95 % confidence interval (CI) 6542–11 726) 8506 CI 4817–11 882), respectively. Based on characteristics O3, six numerical experiments were conducted investigate impacts results show land use led an increase temperature boundary layer height cropland, which conducive diffusion PM2.5. Thus, monthly surface concentrations decreased 10.8 µg m−3 (7.6 %) January. daily maximum 8 h (MDA8) increased 10.6 (6.0 July stronger photochemical production better vertical mixing during daytime. case, ANACs 171 129–200, or about 6.9 January, 203 122–268, 9.5 July. As MDA8 23.9 (16.8 4.8 (2.7 %), respectively, when emissions taken into account. Premature then 388 291–456, 15.7 87 54–112, 4.1 risk perspective, half emissions, can be 2 times This emphasizes that, addition planning also important quality, secondary like O3.

Language: Английский

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Contrasting effects of lake breeze and urbanization on heat stress in Chicago metropolitan area

Urban Climate, Journal Year: 2023, Volume and Issue: 48, P. 101429 - 101429

Published: Jan. 28, 2023

Language: Английский

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Urban effects on local cloud patterns

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(21)

Published: May 15, 2023

Urbanization extensively modifies surface roughness and properties, impacting regional climate hydrological cycles. Urban effects on temperature precipitation have drawn considerable attention. These associated physical processes are also closely linked to clouds' formation dynamics. Cloud is one of the critical components in regulating urban hydrometeorological cycles but remains less understood urban-atmospheric systems. We analyzed satellite-derived cloud patterns spanning two decades over 447 US cities quantified urban-influenced diurnally seasonally. The systematic assessment suggests that most experience enhanced daytime cover both summer winter; nocturnal enhancement prevails by 5.8%, while there modest suppression winter nights. Statistically linking with city geographic locations, backgrounds, we found larger size stronger heating primarily responsible for local diurnally. Moisture energy background control anomalies Under strong mesoscale circulations induced terrains land-water contrasts, clouds exhibit nighttime during warm seasons, which relevant interacting these circulations, other impacts remain complicated inconclusive. Our research unveils extensive influences patterns, diverse depending time, location, properties. comprehensive observational study urban-cloud interactions calls more in-depth life their radiative hydrologic implications under warming context.

Language: Английский

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Response of urban green space cooling effect to urbanization in the Three Ring Road area of Changsha City

Sustainable Cities and Society, Journal Year: 2024, Volume and Issue: 109, P. 105534 - 105534

Published: Aug. 1, 2024

Language: Английский

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Urbanization exacerbates continental- to regional-scale warming

One Earth, Journal Year: 2024, Volume and Issue: 7(8), P. 1387 - 1401

Published: June 13, 2024

Urbanization is usually ignored when estimating past changes in large-scale climate and for future projections since cities historically covered a small fraction of the Earth's surface. Here, by combining global land surface temperature observations with historical estimates urban area, we demonstrate that contribution to continental- regional-scale warming has become non-negligible, especially rapidly urbanizing regions countries Asia. Consequently, expected expansion over next century suggests further increased influence on (approximately 0.16 K North America Europe high-emission scenario 2100). Based these results, also seen air temperature, argue that, line other forms use/land cover change, urbanization should be explicitly included change assessments. This requires incorporation dynamic extent biophysics current-generation Earth system models quantify potential feedback across scales.

Language: Английский

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