نتایج جستجو برای: نمایه uhi

تعداد نتایج: 6389  

2005
Rongbo Xiao Zhiyun Ouyang Xiaoke Wang Weifeng Li

The study reports a research aiming to detect the spatial pattern of urban heat island (UHI) phenomena in Beijing, China, and to determine the relationship between the UHI pattern and a set of landscape and demographical variables. The study area has been one of the fastest growing metropolises in China during the past two decades. Land surface radiance temperature (SRT) values were extracted f...

2014
Lin-Yu Xu Hao Yin Xiao-Dong Xie

Inhalable particulate matter (PM10) is a primary air pollutant closely related to public health, and an especially serious problem in urban areas. The urban heat island (UHI) effect has made the urban PM10 pollution situation more complex and severe. In this study, we established a health risk assessment system utilizing an epidemiological method taking the thermal environment effects into cons...

2016
Clare Heaviside Sotiris Vardoulakis Xiao-Ming Cai

BACKGROUND The Urban Heat Island (UHI) effect describes the phenomenon whereby cities are generally warmer than surrounding rural areas. Traditionally, temperature monitoring sites are placed outside of city centres, which means that point measurements do not always reflect the true air temperature of urban centres, and estimates of health impacts based on such data may under-estimate the impac...

2017
Martin Hendel Pierre Gutierrez Morgane Colombert Youssef Diab Laurent Royon Martin HENDEL Pierre GUTIERREZ Morgane COLOMBERT Youssef DIAB Laurent ROYON

Urban heat island (UHI) countermeasures are of growing interest for cities. Field studies of their micro-climatic effects are scarce, yet are essential to properly evaluate their effectiveness and that of anti-UHI policies. The standard approach to determining their micro-climatic effects is to study the difference in measurements made at case and control stations. However, measurements conduct...

2016
Qunshan Zhao Elizabeth A. Wentz Juan C. Jiménez-Muñoz

Thermal imagery is widely used to quantify land surface temperatures to monitor the spatial extent and thermal intensity of the urban heat island (UHI) effect. Previous research has applied Landsat images, Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images, Moderate Resolution Imaging Spectroradiometer (MODIS) images, and other coarseto medium-resolution remotely sens...

2017
Hoa Q. Nguyen Yuseob Kim Yikweon Jang Hoa Quynh Nguyen

Background. Cryptotympana atrata and Hyalessa fuscata are the most abundant cicada species in the Korean Peninsula, where their population densities are higher in urban areas than in rural ones. The urban heat island (UHI) effect, wherein human activities cause urban areas to be significantly warmer than surrounding rural areas, may underlie this difference. We predicted a positive relationship...

2007
I. D. STEWART Ian Douglas Stewart

Összefoglalás – A városi hősziget (UHI) mérésével kapcsolatos irodalom áttekintése széleskörű ellentmondásokat tár fel a hősziget erősségének számszerűsítéséhez felhasznált városi és külterületi mérési helyeknek az értelmezésében és osztályozásában. Bizonyított, hogy ezeknek az eltéréseknek a gyökere a városklimatológia tér-osztályozási rendszerében régóta fennálló paradigmában, a városi-külter...

2010
Minchung Hsu Junsang Lee

This paper aims to investigate impacts of public provision of universal health insurance (UHI) in an environment with household heterogeneity and financial market incompleteness. Various UHI polices with both distortionary (payroll-tax) and nondistortionary (lump-sum tax) financing methods are compared to address the tradeoff between risk sharing and tax distortion as well as corresponding welf...

2011
Xuchao Yang Yiling Hou Baode Chen

[1] Monthly mean surface air temperature data from 463 meteorological stations, including those from the 1981–2007 ordinary and national basic reference surface stations in east China and from the National Centers for Environmental Prediction and National Center for Atmospheric Research (NCEP/NCAR) Reanalysis, are used to investigate the effect of rapid urbanization on temperature change. These...

2018
Mikhail Varentsov Hendrik Wouters Vladimir Platonov Pavel Konstantinov

Urbanization leads to distinct meteorological features of urban environments, and one the best-known is the urban heat island (UHI) effect. For megacities, these features become mesoscale phenomena (scale ≥ 10 km) that are amplified by the tropospheric feedbacks, and have substantial implications on human well-being. For the first time, a three-dimensional statistical description of the megacit...

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