干旱区生态环境知识资源中心(Arid): The Impact of the Land Cover Dynamics on Surface Urban Heat Island Variations in Semi-Arid Cities: A Case Study in Ahmedabad City, India, Using Multi-Sensor/Source Data

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DOI	10.3390/s19173701
	The Impact of the Land Cover Dynamics on Surface Urban Heat Island Variations in Semi-Arid Cities: A Case Study in Ahmedabad City, India, Using Multi-Sensor/Source Data
	Mohammad, Pir 1; Goswami, Ajanta 1; Bonafoni, Stefania 2
通讯作者	Mohammad, Pir
来源期刊	SENSORS
EISSN	1424-8220
出版年	2019
卷号	19 期号:17
英文摘要	This study examines the behavior of land surface temperature (LST) and surface urban heat island (SUHI) from MODIS data over Ahmedabad city, Gujarat state (India), from 2003 to 2018. Summer and winter LST patterns were analyzed, both daytime and nighttime. Ahmedabad, one of the fastest growing metropolitan cities in India, is characterized by a semi-arid climate. The investigation focuses on the SUHI variations due to warming or cooling trends of both urban and rural areas, providing quantitative interpretations by means of multi-sensor/source data. Land cover maps, normalized differential vegetation index, surface albedo, evapotranspiration, urban population, and groundwater level were analyzed across the years to assess their impact on SUHI variations. Moreover, a field campaign was carried out in summer 2018 to measure LST in several rural and urban sites. During summer daytime, the rural zone exhibits a higher average LST than the urban area, resulting in a mean negative SUHI, typical of arid cities, while a slight positive SUHI (mean intensity of 0.4 degrees C) during winter daytime is present. An evident positive SUHI is found only during summer (1.8 degrees C) and winter nighttime (3.2 degrees C). The negative SUHI intensity is due to the low vegetation presence in the rural area, dominated by croplands turning into bare land surfaces during the pre-monsoon summer season. Higher LST values in the rural area than in the urban area are also confirmed by the field campaign, with an average difference of about 5 degrees C. Therefore, the impact of the rural LST in biasing the SUHI is evident, and a careful biophysical interpretation is needed. For instance, within the urban area, the yearly intensity of the summer daytime SUHI is not correlated with the evapotranspiration, while the correspondent summer daytime LST exhibits a significant negative correlation (-0.73) with evapotranspiration. Furthermore, despite the city growth across the years, the urban area does not generally reveal a temporal increase of the magnitude of the heat island but an enlargement of its spatial footprint.
英文关键词	surface urban heat island semi-arid city MODIS land surface temperature rural area land cover white sky albedo evapotranspiration groundwater table level SUHI footprint
类型	Article
语种	英语
国家	India ; Italy
开放获取类型	Green Published, gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000486861900071
WOS关键词	TEMPORAL TRENDS ; TEMPERATURE ; BALANCE ; EVAPOTRANSPIRATION ; AGGLOMERATION ; PHOENIX ; WAVES ; AREA
WOS类目	Chemistry, Analytical ; Engineering, Electrical & Electronic ; Instruments & Instrumentation
WOS研究方向	Chemistry ; Engineering ; Instruments & Instrumentation
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218846
作者单位	1.IIT Roorkee, Dept Earth Sci, Uttarakhand 247667, India; 2.Univ Perugia, Dept Engn, Via Duranti 93, I-06125 Perugia, Italy
推荐引用方式 GB/T 7714	Mohammad, Pir,Goswami, Ajanta,Bonafoni, Stefania. The Impact of the Land Cover Dynamics on Surface Urban Heat Island Variations in Semi-Arid Cities: A Case Study in Ahmedabad City, India, Using Multi-Sensor/Source Data[J],2019,19(17).
APA	Mohammad, Pir,Goswami, Ajanta,&Bonafoni, Stefania.(2019).The Impact of the Land Cover Dynamics on Surface Urban Heat Island Variations in Semi-Arid Cities: A Case Study in Ahmedabad City, India, Using Multi-Sensor/Source Data.SENSORS,19(17).
MLA	Mohammad, Pir,et al."The Impact of the Land Cover Dynamics on Surface Urban Heat Island Variations in Semi-Arid Cities: A Case Study in Ahmedabad City, India, Using Multi-Sensor/Source Data".SENSORS 19.17(2019).