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Proceedings Paper • Open Access

Distribution of diurnal land surface temperature in Yogyakarta urban area

Paper Abstract

Yogyakarta urban area has grown throughout the year as the course of migration and its attraction to tourists and students resulting the high demand of living space which leads to the increment of built-up area such as hotels and other supportingtourism-activity accommodation, so-called urban sprawl. The increase of paved-surface causes the increase of land surface temperature (LST) which may impact to micro-climate in the urban area with adverse consequences for instance erratic rainfall and rainstorm in the urban area. Consequently, it triggers new future problems. This paper attempt to present the distribution of diurnal Land Surface Temperature (LST) in Yogyakarta urban area, extracted from remotely-sensed Landsat 8 image acquired from a two—year images. Prior the extraction, several variables are incorporated i.e Normalized Difference Vegetation Index (NDVI) to calculate emissivity, as well as atmospheric correction parameter transmissivity, upwelling and downwelling radiance. In order to obtain NDVI, the reflectance values are also corrected. Land surface temperature is extracted according to the procedures: conversion of digital number of Landsat image to radiance, correction of radiance value, conversion of the corrected radiance value to brightness temperature, then brightness temperature to land surface temperature. The extracted temperature map then presented into 10°C interval. Consecutively, the two-year of temperature maps are then analyzed to obtain the difference of its spatial distribution. The expected result is the expanding high temperature distribution in the urban area. The result shows there is an increase of the average land surface temperature by 3oC from two different image, 2014 and 2018. The majority value of temperature is between 30 – 40°C, dominated with built-up area. Two image shows that the respective area spread from 54% to 70%.

Paper Details

Date Published: 21 November 2019
PDF: 9 pages
Proc. SPIE 11311, Sixth Geoinformation Science Symposium, 1131109 (21 November 2019); doi: 10.1117/12.2548980
Show Author Affiliations
Alfiatun N. K., Univ. Gadjah Mada (Indonesia)
Dwi Setyo Aji, Univ. Gadjah Mada (Indonesia)

Published in SPIE Proceedings Vol. 11311:
Sixth Geoinformation Science Symposium
Sandy Budi Wibowo; Andi B. Rimba; Stuart Phinn; Ammar A. Aziz; Josaphat Tetuko Sri Sumantyo; Hasti Widyasamratri; Sanjiwana Arjasakusuma, Editor(s)

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