Effects of riparian buffers of North Mort of Beijing on air temperature and relative humidity

Fangfang, 吴芳芳 Wu; Na, 张娜 Zhang; Xiaoyan, 陈晓燕 Chen

doi:10.5846/stxb201201050023

Cited by 3 publications

(1 citation statement)

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“…In recent years, many microclimate and thermal comfort related research mainly focused on the thermal environment in different urban environmental sites in inland areas [5][6][7][8][9][10][11][12][13]. Such as indoor and outdoor buildings [10], urban parks [14][15][16][17][18][19], streets [20][21][22][23][24], and the influence of plant species and forest types on thermal comfort [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Thermal Regulation of Coastal Urban Forest Based on ENVI-Met Model—A Case Study in Qinhuangdao, China

Lai

Ning

et al. 2022

Sustainability

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Urban forests can improve human comfort by improving the near-surface microclimate. Exploring the microclimate characteristics of urban forests and their impact on human comfort is particularly important to improve the urban thermal environment through scientific urban forest design. Since most previous studies were conducted under typical inland urban climates and little is known about the thermal regulation services of coastal urban forests, this study field measured the thermal surface radiation temperature of 16 open spaces in the urban forest site in Qinhuangdao. Then the ENVI-met software was used to simulate and analyze the microclimate characteristics before and after the park’s building-up, and compare the differences in the human comfort index in different scenarios. Results indicated that: (1) Vegetation have a significant cooling effect on surrounding environment. The farther away from vegetation area, the higher the average surface temperature. (2) Water bodies have the best cooling and humidifying effect on the 9–18 m surrounding environment with the best human comfort index. (3) In summer, air temperature in park decreased by 0.4~1.4 °C, and the relative humidity increased by 0.07~2.81%. (4) After the park’s built-up, the average human comfort index was optimized by 0.02~1.87. Arranging the leisure open space around the water bodies and forest edge space of the deciduous broad-leaved forest could improve human comfort. This research is expected to provide a scientific basis and planning inspiration for the construction of coastal urban forests in the same latitude area.

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Section: Introductionmentioning

confidence: 99%

Thermal Regulation of Coastal Urban Forest Based on ENVI-Met Model—A Case Study in Qinhuangdao, China

Lai

Ning

et al. 2022

Sustainability

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A Study on Microclimate characteristics and energy balance within near-river riparian systems

Liang

Xie

Che

2021

IOP Conf. Ser.: Earth Environ. Sci.

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Riparian microclimate studies are gaining increasing attention due to their close ecological, climatologic and aesthetic interactions with lives in both natural and urban areas. Historically, many researchers studied thermal regimes of rivers and river temperature responses to different management strategies. Near-river microclimate characteristics and relevant energy balance were not fully understood. This review documents recent research on near-river microclimatic features and energy exchanging processes, roles of macroclimate, rivers, riparian vegetation and topography play in microclimate mitigation, their ecological importance in terms of biodiversity support and human thermal comfort promotion. It also emphasizes potentials of studies on integration of rivers and plants, as well as their controls on heat exchanging. This study is hopefully useful for river scholars to strengthen the comprehension for further research, as well as for river designers and managers to make informed decisions of sustainable urban development.

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Spatial-Temporal Variation of Air PM2.5 and PM10 within Different Types of Vegetation during Winter in an Urban Riparian Zone of Shanghai

et al. 2021

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Particulate matter (PM) in urban riparian green spaces are undesirable for human participation in outdoor activities, especially PM2.5 and PM10. The PM deposition, dispersion and modification are influenced by various factors including vegetation, water bodies and meteorological conditions. This study aimed to investigate the impact of vegetation structures and the river’s presence on PM in riparian zones. The spatial-temporal variations of PM2.5 and PM10 concentrations in three riparian vegetation communities with different structures (open grassland (G), arbor-grass (AG) and arbor-shrub-grass (ASG) woodlands) were monitored under relatively stable environment. The removal percentages (RP) and ratios of PM2.5 and PM10 were calculated and compared to identify the removal effect of vegetation structures and the river’s presence. It is found that: (1) when the wind was static (hourly wind speed < 0.2 m/s), the RP was ranked as follows: G > AG > ASG. When the wind was mild (0.2 m/s < hourly wind speed < 2 m/s), the RP was ranked as follows: G > ASG > AG. Generally, the G had the best removal effect during the monitoring period; (2) the lowest RP occurred in the middle of the G (–3.4% for PM2.5, 1.8% for PM10) while the highest RP were found in middle of the AG and ASG, respectively (AG: 2.1% for PM2.5, 6.7% for PM10; ASG: 2.4% for PM2.5, 6.3% for PM10). Vegetation cover changed the way of natural deposition and dispersion; (3) compared with static periods, PM removal percentages were significantly reduced under mild wind conditions, and they were positively correlated with wind speed during the mild-wind period. Thus, a piecewise function was inferred between wind speed and PM removal percentage; (4) for all three communities, the 1 m-to-river PM2.5/PM10 ratio was significantly lower than that at 6 m and 11 m, even lower than that in the ambient atmosphere. The river likely promoted the hygroscopic growth of PM2.5 and the generation of larger-sized particles by coagulation effect. Based on these findings, open grassland space is preferred alongside rivers and space for outdoor activities is suggested under canopies in the middle of woodlands.

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Effects of riparian buffers of North Mort of Beijing on air temperature and relative humidity

Cited by 3 publications

References 0 publications

Thermal Regulation of Coastal Urban Forest Based on ENVI-Met Model—A Case Study in Qinhuangdao, China

Thermal Regulation of Coastal Urban Forest Based on ENVI-Met Model—A Case Study in Qinhuangdao, China

A Study on Microclimate characteristics and energy balance within near-river riparian systems

Spatial-Temporal Variation of Air PM2.5 and PM10 within Different Types of Vegetation during Winter in an Urban Riparian Zone of Shanghai

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