C.Y. Jim

C.Y. Jim
The Education University of Hong Kong | ied · Department of Social Sciences (SSC)

PhD

About

337
Publications
136,452
Reads
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13,455
Citations
Citations since 2016
120 Research Items
8857 Citations
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201620172018201920202021202205001,0001,500
201620172018201920202021202205001,0001,500
Additional affiliations
July 2018 - present
The Education University of Hong Kong
Position
  • Chair
Description
  • Core research interest in urban ecology, interfacing with urban forestry, urban green spaces, green roof, vertical greening (green wall), urban design and landscape planning, and soil science, focusing on Hong Kong and south China.
July 2018 - present
The Education University of Hong Kong
Position
  • Chair
April 1981 - present
The University of Hong Kong
Position
  • Chair
Description
  • University teaching in soil science, urban forestry, and nature conservation since 1981. Supervision of over 42 PhD and MPhil students (up to October 2014).
Education
June 1982 - August 1982
United States Geological Survey
Field of study
  • Hydrology
September 1977 - January 1981
University of Reading
Field of study
  • Soil Science
September 1972 - June 1975
University of Hong Kong
Field of study
  • Geography and Geology

Publications

Publications (337)
Article
Backyards play important roles for individual households because they provide a private and safe green space for social and environmental interactions, relaxation, gardening and children's activities. The use of backyards is highly dependent on their thermal conditions. Turf is a common surface type in backyards but unirrigated turf can be as warm...
Article
Full-text available
The public transit system is often developed in tandem with urban growth, bringing improved accessibility and raising housing prices around stations. The impact of public transport accessibility on housing prices demand in-depth empirical studies to understand the underlying factors. The confounding influence of polycentric cities, contrasting with...
Article
A green roof can modify the roof outer surface temperature (Tr) to influence indoor air temperature (Ti). Green roof design and roof-slab thermal insulation jointly determine the coupled-roof system’s thermal performance. This study investigated their joint effects on subtropical winter warming, which were seldom investigated. Custom-built houses w...
Article
The coniferous shrub Oliver’s plum yew ( Cephalotaxus oliveri ) is endemic to southern China with potential medicinal use for cancer treatment and ecological value in sustaining China’s threatened subtropical forest ecosystems. Comprehensive understanding of the current spatial patterns of this vulnerable species vis-à-vis climatic conditions is cr...
Article
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Aims Cramped and sealed sites common in compact city areas limit tree growth due to multiple physical restrictions and physiological stresses. Fast urbanization and densification have intensified the pressure on urban trees, demanding innovative methods and solutions. The subaerial tree-growth space attracts more attention, but the more intractable...
Article
Vegetation-coverage research shows China’s significant 25% contribution to global greening. Vegetation is the link between water, soil and atmosphere, making it an important indicator of changes in anthropogenic factors. Anthropogenic attribution analysis of vegetation change helps us to identify and estimate the relationship between vegetation cha...
Article
Spontaneous urban plants (SUPs) constitute an important component of urban vegetation, but they have received less attention in urban biodiversity and ecological research, especially at the regional scale. We comprehensively reviewed the occurrence records of SUPs in 59 major cities across China's geographical regions. We systematically analyzed fl...
Article
Public perceptions of ecosystem services and disservices of urban greenery are critical for urban greening policies. However, few studies have explored the association between perceptions and urban-greenery demands. Using questionnaires, we surveyed 467 Hong Kong residents on a range of 68 ecosystem services and 38 disservices. Principal component...
Article
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Urban green spaces (UGS) provide many social benefits and improves residents’ wellbeing. Studying residents’ perceptions of UGS’s social benefits and driving factors could promote public health and environmental justice. A questionnaire survey of 432 Beijing residents and statistical tests assessed the impacts of residents’ living environments and...
Article
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Studying the spatial–temporal evolution of oasis urban landscape patterns can provide a unique reference for future sustainable development. This study aimed to characterize the spatio-temporal evolution of landscape patterns in the past 20 years. The remote sensing and spatial analysis techniques included land transfer matrix, orientation evolutio...
Article
Urbanization and densification have extended some urban greenery skyward. Understanding expectations of aboveground green space can enhance public support and benefits. We evaluated the perceived benefits and preference for landscape elements of green roofs based on a questionnaire survey of 477 Hong Kong residents using principal component and clu...
Article
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In this study, we investigated the relationships among species composition, diversity, distribution, growth status, and habitats of venerable trees (VTs) in Wuzhishan City, Hainan, China. VT are defined as venerable tree. VTs bear witness to changes in human society and culture; VTs that once occurred in open or forested areas are now often surroun...
Article
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Many cities advocate retrofitting green roofs and green walls (GRGW) to create additional green areas, especially in cramped urban areas. Yet, worldwide, only a handful of studies have evaluated the public views towards the benefits and negative issues and promotion policies of this innovative greening option. To address this gap in the literature,...
Article
The aggravation of climate change and human activities have challenged the fragile ecology of the arid and semi-arid Xinjiang in Northwest China. The concept of ecological carrying capacity (ECC) refers to the ability of an ecosystem to support the healthy development of the human social system and provide adequate resources and enabling environmen...
Article
To tackle urban overheating induced by the combined effect of global warming and intensive urbanization, researchers have recommended assimilating microclimate-related strategies into urban design practices. Field measurements, playing a central role in urban climatology, have been widely applied worldwide. Reviewing the last five years' field meas...
Article
Purpose This paper aims to establish a model to evaluate the benefits of building information modeling (BIM) from the owners' perspective. The model analyzes the correlation between five secondary benefit indicators and their subsystems: product, financial, organizational, management and strategic. The final key factors of BIM benefits provide a de...
Article
Urban green spaces provide multiple benefits but incur some negative impacts. We employed the contingent valuation method to investigate Hong Kong residents’ willingness‐to‐pay to improve urban green space provision. A questionnaire collected 316 responses from urban‐park visitors. It assessed perceptions of positive benefits and negative impacts a...
Article
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Urban parks provide essential outdoor recreation space, especially for high-density cities. This study evaluated the park-visiting activity profiles of residents to inform the planning and design of community-relevant parks. The visiting and activity patterns of 465 Hong Kong adult residents were collected using a structured questionnaire. The corr...
Article
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Sponge cities provide broad hydrological functions to alleviate urban flooding and other water-related problems in China. Conventional impervious paving cannot meet contemporary sustainable city goals. The permeable paving technology offers primary benefits such as increasing stormwater infiltration, drainage, purification, groundwater recharge, an...
Article
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Changes in land use land cover (LULC) and landscape pattern in arid areas can considerably impact water quality in small watersheds. Exploring the associations between land use, landscape pattern, and riverine water quality can inform land-use planning for water-quality security. In northwest China's Jing River Watershed (JRW), water samples were c...
Article
Climate change and urbanisation have exacerbated social inequities. Increasing urban heat has made high-density housing units a vulnerability hotspot. Alternatives to extended air-conditioning are required. This research sought evidence on using urban parks as a sustainable alternative by low-income households deprived of adequate living space. We...
Article
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Urban trees perform various ecosystem services, and tree DBH (trunk diameter at breast height, 1.3 m above the ground) can act as a surrogate measure of these important functions. However, DBH has seldom been studied in relation to spatial variation, possible underlying drivers, and response to urbanization. Our field investigation collected data f...
Article
Prefabricated concrete building (PCB) can save resources, reduce construction, improve quality, and reduce pollution. Understanding PCB environmental benefits versus traditional buildings could reinforce relevant policies and adoption. This study aimed to develop a holistic life-cycle accounting system based on BIM technology to calculate carbon em...
Preprint
Full-text available
Old, valuable trees (OVT) comprise an important urban ecological and cultural resource. Understanding their innate traits and driving factors can facilitate management, conservation and ecotourism development. This study assessed relationship between the species diversity composition, distribution, growth status, and tree-habitat of OVT in Wuzhisha...
Article
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Human and environmental fear-evoking factors discourage park visitation and degrade recreational experience and enjoyment. Planners and managers have often ignored these critical issues. We conducted a questionnaire survey of 872 park users in eight urban parks in Hong Kong, representing different design, size, and socio-demographic and physical ch...
Article
Public views on green roofs and green walls (GRGW) have received little attention; hence, related policies could be detached from community needs and expectations. A comprehensive questionnaire was developed to compare perceptions of GRGW benefits and negative impacts and attitudes towards government GRGW promotion in Beijing and Hong Kong. Beijing...
Article
Societal and technological advances have triggered demands to improve urban environmental quality. Urban green space (UGS) can provide effective cooling service and thermal comfort to alleviate warming impacts. We investigated the relative influence of a comprehensive spectrum of UGS landscape and vegetation factors on surface temperature in arid U...
Article
Lawns are highly recognized and indispensable elements in the urban landscape. Due to water-saving, low maintenance cost, and avoided health-environmental impacts of agrochemical usage, artificial turf (AT) has increasingly replaced some natural turf (NT) sports fields and recreational lawns. It remains controversial whether AT is a healthy alterna...
Article
Full-text available
Urban green space (UGS) could contribute to sustainable urban development. Studying residents’ perception of UGS ecological benefits could provide the empirical basis to improve UGS management and quality of life. Based on the questionnaire surveys of 432 residents in Beijing, assisted by non-parametric statistical tests, this paper assessed the re...
Article
The construction industry accounts for a large proportion of the direct and indirect carbon emissions in China. The traditional cast-in-place method, still rather common, can no longer meet contemporary green buildings requirements. Prefabricated concrete components can reduce carbon footprint, especially the materialization stage that generates th...
Article
Full-text available
High-frequency monitoring of suspended particulate matter (SPM) concentration can improve water resource management. Missing high-resolution satellite images could hamper remote-sensing SPM monitoring. This study resolved the problem by applying spatiotemporal fusion technology to obtain high spatial resolution and dense time-series data to fill im...
Article
Thermal infrared remote sensing is a popular tool to measure the impacts of land cover on land surface temperature (LST) in cities. Tree-covered areas usually exhibit a lower LST than other urban surfaces such as concrete, suggesting that urban trees can improve human thermal comfort. However, the remotely-sensed LST of trees is only representative...
Article
Rhodomyrtus tomentosa, with edible and medicinal values, is a key shrub species in south China's forest understory. It maintains ecological balance, soil and water conservation, and biodiversity in the widely degraded mountain ecosystems. The distribution and population of R. tomentosa have shrunk recently due to anthropogenic impacts. At present,...
Article
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Sky gardens, a type of above-ground urban green space, have been increasingly welcomed and installed in cities. However, few studies have assessed tree planting, management and health in high-rise greenery. This study investigated tree species composition, planting space design and management, and their relationships with tree health in sky gardens...
Article
Public perceptions of urban forests have been widely investigated, but the professional practitioners’ views have received little attention. Surveying the opinions of tree professionals could inform and fine-tune urban forest policies and practices. The opinions of 79 tree officers in London were evaluated. Our questionnaire assessed the levels of...
Article
Full-text available
Within urban green spaces, tree species diversity is believed to correlate with aboveground biomass, though there is some disagreement within the literature on the strength and directionality of the relationship. Therefore, we assessed the relationship between the biodiversity of woody species and the aboveground biomass of woody plant species in t...
Article
Cities have become the main abodes for people, and landscape plants with their notable influence on quality of life, are important components of the urban ecosystem. The need to explore the climatic suitability and sustainability of landscape plants is especially relevant due to globalization and climate change. Nevertheless, this research area is...
Article
Exercising in an unusually hot environment may aggravate exertional heat illness. Turf material significantly affects the microenvironment and heat-stress sensation of sports-field users. However, the difference in human- biometeorological effects between different sports-field turf materials demands further investigation. This study compared artif...
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Jacaranda mimosifolia is regarded as a prized ornamental tree in the urban landscape with attractive, abundant and long-lasting violet-colored flowers and graceful tree form. It has been widely cultivated in recent years in many Chinese cities. However, the lack of scientific and practical guidance to cultivate the exotic species has brought about...
Article
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Record climate extremes are reducing urban liveability, compounding inequality, and threatening infrastructure. Adaptation measures that integrate technological, nature-based, and social solutions can provide multiple co-benefits to address complex socioecological issues in cities while increasing resilience to potential impacts. However, there rem...
Article
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Resettlement residential areas (RRAs) are a unique product of China's urbanisation process. Their greening environment is critical to the quality of life and liveable green neighbourhood of the displaced farmers. Our study aimed to (1) interpret the species composition of the landscape trees and their contributions to urban biodiversity in RRAs, an...
Article
Urban green and blue infrastructures (GBI) are considered an effective tool for mitigating urban heat stress and improving human thermal comfort. Many studies have investigated the thermal effects of main GBI types, including trees, green roofs, vertical greenings, and water bodies. Their physical characteristics, planting designs, and the surround...
Article
Tree growth in urban areas is beset by multiple stresses, of which the soil component has imposed severe constraints. In the tropics, the inherently infertile and acidic soils present challenges that demand dedicated solutions. Yet, the key edaphic issues have remained poorly understood and often inadequately evaluated and improved. Where site soil...
Article
Urban park patronage is intimately linked to the thermal comfort level perceived by visitors. This study quantified the effects of nine park-design and urban-landscape parameters on air temperature and relative humidity in summer by deploying 100 sensors in 14 urban parks in Hong Kong. The field data were compared with a reference weather station a...
Article
Soil can absorb and retain solar heat to influence critically the thermal-energy performance of green roofs. Its modification to optimize warming effect in winter has received inadequate attention. Adopting the modeling approach, this study investigated key soil parameters to improve warming of the roof outer surface temperature (ROST) in winter us...
Article
Ornamental trees bearing outstanding flowers bring notable ecosystem services to cities. Existing research often treated ornamental trees as a sub-category of urban trees. To study the contributions of ornamental trees, this study aimed to: (1) assess the provision of ecosystem services of ornamental trees; and (2) examine ecological composition an...
Article
The sub-divided unit (SDU) is the major type of substandard housing in Hong Kong. This study monitored the microclimatic conditions in eight SDUs for 24 h in summer. The mean CO2 concentration (1012 mg/m³) under natural ventilation was much higher than the outdoor level (∼410 mg/m³), suggesting that ventilation was ineffective in most SDUs. The mea...
Article
Full-text available
Urban green spaces provide a host of ecosystem services, the quantity and structure of which play an important role in human well-being. Rapid urbanization may modify urban green spaces, having various effects on plant diversity. Tropical coastal cities have urbanized rapidly in recent decades, but few studies have been conducted with a focus on th...
Article
Humans possess limited knowledge on what generated cultural dynamics to strengthen human resilience to overcome climate-induced stresses. Although the highly developed mental ability of humans could have enabled significant human resilience in history, no study has empirically explained or has even scientifically confirmed how and when such dynamic...
Chapter
In hot and humid subtropical climate, strong solar radiation imposes heat stress upon building users who often resort to air-conditioning in a bid to improve indoor thermal comfort. Green wall is a nature-based solution to the enormous cooling need. Foliage of climber vegetation can reduce the short-wave radiative penetration into the indoor space...
Article
Climate change has induced increasingly alarming impacts on urban environment. Adaptation is one of the most common measures to mitigate the impacts and reduce vulnerability. This study explored the individual adaptation from a cognitive and psychological perspective that has rarely been adopted. The current study aims to measure the risk perceptio...
Article
Full-text available
Urban green spaces provide a host of ecosystem services, the quantity and structure of which play an important role in human well-being. Rapid urbanization may modify urban green spaces, having various effects on plant diversity. Tropical coastal cities have urbanized rapidly in recent decades, but few studies have been conducted with a focus on th...
Article
Full-text available
Green roofs contribute notably to green building and sustainable city goals. Most studies focused on summer cooling and energy-saving benefits, with little attention on winter warming effect. This study evaluated contributions of the soil component to winter warming with reference to the thickness and moisture content. In subtropical Wuyishan city,...
Article
Sustainable urban forests require healthy trees with stable structures to improve provision of ecosystem services including air purification and climate mitigation to urban areas. Trees in compact residential areas are particularly prone to development of defects and unstable tree structures. We assessed in detail tree species, key structural and p...
Article
The negative consequences of increased urbanization on native biological and cultural diversity have received considerable research attention. Biological and cultural diversity can be sustained by counteracting various processes of floristic homogenization and by reestablishing connections between humans and nature. However, effective instruments t...
Article
Full-text available
ContextQuantitative information regarding tree species-specific size is an essential tool for landscape planning. It reflects tree-environment and human–environment interactions in the urban landscape. The effects of habitat types on tree allometry have seldom been evaluated.Objectives Firstly, to derive size-related information of common urban tre...
Article
Full-text available
Existing studies emphasizing the magnitude of green-wall thermal benefits paid little attention to temporal microclimatic behavior. To bridge the knowledge gap, we employed high-precision sensors to monitor the microclimate of two wirerope-type climber green walls and adjacent control bare walls in humid-subtropical Hong Kong. Sample days were syst...
Article
Surface urban heat island (SUHI) shows higher surface thermal intensification in urban areas than the suburban areas and countryside. Green spaces are widely recognized as the dominant nature-based strategy to mitigate thermal stress. In contrast, natural cooling processes of urban blue spaces are seldom addressed. In this study, we applied the Goo...
Article
The cooling effect of trees is one of the most important ecosystem services offered by natural components in cities. However, the large variations in cooling magnitudes reported in different studies call for deeper understanding of the underlying mechanisms. This study investigated the seasonal and meteorological effects on the cooling magnitude of...
Article
Heritage trees are recognized as elements of cultural landscapes and as keystone ecological entities in human-dominated landscapes, often bestowing high socio-cultural and ecological values. Current understanding of species distribution patterns and broad-scale species assemblages of heritage trees is limited. This study analyzed the diversity, dis...
Article
Older trees in good health are expected to provide more ecosystem services and equivalent economic values due to their large size. The relationship of tree dimensions, respective tree height, crown area, diameter at breast height (dbh), and total leaf area vis-a-vis age were studied for 790 heritage trees ≥ 100 years old in Macau; 50 genera and 63...
Article
Thermally comfortable urban parks can attract more visitors and promote the delivery of health benefits to citizens. High tree cover (TREE) and low sky view factor (SVF) are known to reduce air temperature and improve thermal comfort. However, the temperature effects of other landscape parameters are less clear, such as building volume ratio (BV),...
Article
Recent rapid urbanization has rendered outdoor space a key quality-of-life factor, yet walkability studies especially in hot-humid climates have seldom considered human biometeorology. This site-level study investigated microclimatic functions of an overhead structure in improving walkability, and identified biometeorology-related factors influenci...
Article
As urban green space, green roof has been increasingly installed in cities mainly for amenities, temperature regulation and energy conservation. Nevertheless, in subtropical urban setting and during winter, the thermal and radiation behaviours of green roofs, especially the intensive type, have remained poorly understood. This paper examined the ef...
Article
Full-text available
Selecting suitable species to enhance ecological functions is crucial for improvements in the planning and design of roof greening and in maintaining sustainable urban development, especially in rapidly urbanized areas. Assisted by field trips to enhance studies, the present project assessed the ecological functions of 207 plant species used for ro...
Article
Thermal modifications by a 1.5 m deep pond on adjacent lawn microclimate on sunny, cloudy, overcast and rainy summer days were investigated in subtropical Hong Kong. Microclimatic parameters at a pondside lawn were monitored and compared to an open lawn and a concrete rooftop (Control), with focus on Universal Thermal Climate Index (UTCI) to invest...
Article
Socio-economically underprivileged urban communities might suffer from restricted access to urban forests. Environmental injustice research on urban greenery in Asian cities is lacking. Public housing estates in Hong Kong, accommodating low-income households and over half of the 7.45 million population, were investigated for injustice in tree provi...
Article
In this study, we examined the effects of key urban (road cover, building volume ratio, and proximity to sea) and landscape (water body, tree cover, shrub cover, turf cover, park area, and sky view factor) parameters on air temperature, and the impacts of weather conditions on landscape-temperature relationship. One hundred temperature sensors were...
Article
Full-text available
This study investigated the air quality impacts of open-plan cooking in subdivided units (SDUs), which is a type of substandard housing in Hong Kong. About 210,000 persons (2.9% of the population) currently live in such tiny and poorly ventilated dwellings. With a median floor area of merely 9.3 m² (100 ft²), most SDUs do not have space for a parti...
Article
Climate variations and land-use change induced by rapid urbanization can lead to crucial impacts on ecosystem Net Primary Productivity (NPP), especially in regions with intensive human activity. However, the relative contributions of land-use change and climate variations to NPP changes under different urbanization intensities are still a topic of...
Article
Global climate change and urban heat island effect have jointly threatened human thermal comfort in cities. Intensive green roof (IGR) could supplement urban green space to alleviate thermal comfort. Aiming at examining the impact of IGR on the thermal comfort of its users, Universal Thermal Climate Index (UTCI) and physiological equivalent tempera...
Article
Sub-divided unit (SDU) provides substandard housing in Hong Kong by partitioning a small flat into several tiny units. With typical floor area of merely 9.3 m ² , they often lack a partitioned kitchen. About 210,000 persons (2.9% of Hong Kong's population) are living in 92,700 SDUs. Inserting extra partitions significantly suppress ventilation whic...
Article
The risk of developing sick building syndrome is known to be higher in air-conditioned than naturally ventilated spaces. In Hong Kong, air conditioning (AC) is commonly used in homes to relieve summer heat stress. This study aims to assess the air quality impacts of AC in tiny homes called SDUs (sub-divided units). Poor ventilation and stronger hea...
Article
With compact development mode and subtropical climate, urban Hong Kong suffers from the urban heat island exacerbated by climate change. In recent years, record-high summer air temperatures (Ta) and heat stress were recorded, which discourage outdoor exercise and nature-based enjoyment. The thermal overload could be mitigated by urban woodlands tha...