Land Surface Temperature Anomalies as Indicators of Urban Land Cover Change—A Study of Two Indian Cities
Rapid urbanisation over the years has led to the loss of natural land cover, thereby affecting Land Surface Temperature (LST) distribution in urban areas. This study aims to analyse LST anomalies (calculated as the deviation from the normal) over selected Indian cities and check if critical land cov...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2024-12-01
|
| Series: | Earth Science, Systems and Society |
| Subjects: | |
| Online Access: | https://www.lyellcollection.org/doi/10.3389/esss.2024.10096 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841548565430665216 |
|---|---|
| author | Anusha Roy Eswar Rajasekaran Rahul Harod L. Gnanappazham |
| author_facet | Anusha Roy Eswar Rajasekaran Rahul Harod L. Gnanappazham |
| author_sort | Anusha Roy |
| collection | DOAJ |
| description | Rapid urbanisation over the years has led to the loss of natural land cover, thereby affecting Land Surface Temperature (LST) distribution in urban areas. This study aims to analyse LST anomalies (calculated as the deviation from the normal) over selected Indian cities and check if critical land cover changes can be identified. LST from Landsat Thermal Infrared (TIR) images acquired in March, April and May from 1988 to 2020 were used to estimate LST anomalies. Positive LST anomalies were observed mainly over barren and impervious areas; however, some areas showed a negative anomaly where the barren lands were converted to vegetated areas. The study has demonstrated that while some developed areas exhibit a positive anomaly indicative of significant changes or development, there are instances where the conversion of barren land to developed (i.e. built up) areas has resulted in a negative anomaly. Developed areas that are closer to the water creek or mangroves were associated with lower anomaly values indicating the cooling effect of the water body and vegetation. Conversely, the core urban areas generally exhibited higher LST values with positive anomalies indicating a warming effect. These findings can be used by city planners to identify hotspot areas and develop more effective strategies and policies to address the challenges of urban heat. They also highlight the regions that require infrastructural resources and policy changes to reduce the temperature. |
| format | Article |
| id | doaj-art-462f7f43bf6f44fb93f048a7aa292be0 |
| institution | Kabale University |
| issn | 2634-730X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Earth Science, Systems and Society |
| spelling | doaj-art-462f7f43bf6f44fb93f048a7aa292be02025-01-10T14:04:55ZengFrontiers Media S.A.Earth Science, Systems and Society2634-730X2024-12-014110.3389/esss.2024.10096Land Surface Temperature Anomalies as Indicators of Urban Land Cover Change—A Study of Two Indian CitiesAnusha Roy0Eswar Rajasekaran1Rahul Harod2L. Gnanappazham31Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai, India1Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai, India1Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai, India3Department of Earth and Space Sciences, Indian Institute of Space Science and Technology, Thiruvananthapuram, Kerala, IndiaRapid urbanisation over the years has led to the loss of natural land cover, thereby affecting Land Surface Temperature (LST) distribution in urban areas. This study aims to analyse LST anomalies (calculated as the deviation from the normal) over selected Indian cities and check if critical land cover changes can be identified. LST from Landsat Thermal Infrared (TIR) images acquired in March, April and May from 1988 to 2020 were used to estimate LST anomalies. Positive LST anomalies were observed mainly over barren and impervious areas; however, some areas showed a negative anomaly where the barren lands were converted to vegetated areas. The study has demonstrated that while some developed areas exhibit a positive anomaly indicative of significant changes or development, there are instances where the conversion of barren land to developed (i.e. built up) areas has resulted in a negative anomaly. Developed areas that are closer to the water creek or mangroves were associated with lower anomaly values indicating the cooling effect of the water body and vegetation. Conversely, the core urban areas generally exhibited higher LST values with positive anomalies indicating a warming effect. These findings can be used by city planners to identify hotspot areas and develop more effective strategies and policies to address the challenges of urban heat. They also highlight the regions that require infrastructural resources and policy changes to reduce the temperature.https://www.lyellcollection.org/doi/10.3389/esss.2024.10096Land Surface Temperature anomalysurface urban heat islandlandcover changeremote sensinggreen infrastructure |
| spellingShingle | Anusha Roy Eswar Rajasekaran Rahul Harod L. Gnanappazham Land Surface Temperature Anomalies as Indicators of Urban Land Cover Change—A Study of Two Indian Cities Earth Science, Systems and Society Land Surface Temperature anomaly surface urban heat island landcover change remote sensing green infrastructure |
| title | Land Surface Temperature Anomalies as Indicators of Urban Land Cover Change—A Study of Two Indian Cities |
| title_full | Land Surface Temperature Anomalies as Indicators of Urban Land Cover Change—A Study of Two Indian Cities |
| title_fullStr | Land Surface Temperature Anomalies as Indicators of Urban Land Cover Change—A Study of Two Indian Cities |
| title_full_unstemmed | Land Surface Temperature Anomalies as Indicators of Urban Land Cover Change—A Study of Two Indian Cities |
| title_short | Land Surface Temperature Anomalies as Indicators of Urban Land Cover Change—A Study of Two Indian Cities |
| title_sort | land surface temperature anomalies as indicators of urban land cover change a study of two indian cities |
| topic | Land Surface Temperature anomaly surface urban heat island landcover change remote sensing green infrastructure |
| url | https://www.lyellcollection.org/doi/10.3389/esss.2024.10096 |
| work_keys_str_mv | AT anusharoy landsurfacetemperatureanomaliesasindicatorsofurbanlandcoverchangeastudyoftwoindiancities AT eswarrajasekaran landsurfacetemperatureanomaliesasindicatorsofurbanlandcoverchangeastudyoftwoindiancities AT rahulharod landsurfacetemperatureanomaliesasindicatorsofurbanlandcoverchangeastudyoftwoindiancities AT lgnanappazham landsurfacetemperatureanomaliesasindicatorsofurbanlandcoverchangeastudyoftwoindiancities |