Flip flop of Day-night and Summer-Winter Surface Urban Heat Island Intensity in India.

ABSTRACT: The difference in land surface temperature (LST) between an urban region and its nearby non-urban region, known as surface urban heat island intensity (SUHII), is usually positive as reported in earlier studies. India has experienced unprecedented urbanization over recent decades with an urban population of 380 million. Here, we present the first study of the diurnal and seasonal characteristics of SUHII in India. We found negative SUHII over a majority of urban areas during daytime in pre-monsoon summer (MAM), contrary to the expected impacts of urbanization. This unexpected pattern is associated with low vegetation in non-urban regions during dry pre-monsoon summers, leading to reduced evapotranspiration (ET). During pre-monsoon summer nights, a positive SUHII occurs when urban impacts a

SUBMITTER: Shastri H 

PROVIDER: S-EPMC5220321 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature