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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12351
Title: Spatio - temporal variations of urban heat island over Delhi
Authors: Pandey A.K.
Singh S.
Berwal S.
Kumar D.
Pandey P.
Prakash A.
Lodhi N.
Maithani S.
Jain V.K.
Kumar K.
Published in: Urban Climate
Abstract: Temporal and spatial trends of the surface urban heat island (UHI) formation over Delhi are examined with respect to aerosol load and land-cover variations. The study reveals that temperatures over Delhi are higher than those over the surrounding regions almost through-out the year during the night time. The nocturnal heat island intensity is minimum (0-2. K) during the monsoon months and maximum during the month of March (4-6. K). The UHI trends during the day-time are however, significantly different. It is observed that a day-time cool island forms over Delhi twice during the year in the months of May-June and October-December. Analysis of temporal variations in urban heat island intensity (UHII) and aerosol load over Delhi reveals a significant negative correlation between UHII and aerosol optical depth (AOD). Spatial analysis of LST, land-cover and AOD for the months of March, May and November confirms the significant role of AOD along with land-cover variables such as percentage area under the classes built-up, rock, vegetation and bare soil. Comparative analysis of LST in the regions lying north, south, east and west of Delhi in relation to the prevailing land-cover suggests that thermal inertia is also a very important factor determining the urban-rural thermal structure. © 2014 Elsevier B.V.
Citation: Urban Climate (2014), 10(P1): 119-133
URI: https://doi.org/10.1016/j.uclim.2014.10.005
http://repository.iitr.ac.in/handle/123456789/12351
Issue Date: 2014
Publisher: Elsevier B.V.
Keywords: AOD
Land-cover
MODIS
Thermal
UHI
ISSN: 22120955
Author Scopus IDs: 56766280600
8934029200
56412004800
57202478211
52763641900
7202316466
35119105800
9637385600
57203362465
7402676131
Author Affiliations: Pandey, A.K., School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
Singh, S., CSIR-National Physical Laboratory, New Delhi, India
Berwal, S., School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
Kumar, D., School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
Pandey, P., Centre for Environmental Science and oTechnology, Central University of Punjab, Bathinda, Punjab, India
Prakash, A., Department of Environmental Science, School of Science, Tezpur University, Assam, India
Lodhi, N., CSIR-National Physical Laboratory, New Delhi, India
Maithani, S., Indian Institute of Remote Sensing, Dehradun, Uttrakhand, India
Jain, V.K., School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
Kumar, K., School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
Funding Details: The authors would like to thank the Department of Science and Technology (DST), Government of India for providing financial support for this study. Further, the authors would like to acknowledge the MODIS scientific and data support teams and the Giovanni online data system, developed and maintained by the NASA GES DISC for making the data available.
Corresponding Author: Kumar, K.; School of Environmental Sciences, Jawaharlal Nehru UniversityIndia
Appears in Collections:Journal Publications [ME]

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