Impacts of Thermal Differences in Surfacing Urban Heat Islands on Vegetation Phenology
Urbanization has significantly changed thermal environments and vegetation phenology. However, the effects of spatially different land surface temperatures (LST) on vegetation phenology, rather than differences between urban areas and rural areas, remain unclear. In this study, four cities with simi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/21/5133 |
| _version_ | 1797631326600298496 |
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| author | Yongke Yang Xinyi Qiu Liuming Yang Dohyung Lee |
| author_facet | Yongke Yang Xinyi Qiu Liuming Yang Dohyung Lee |
| author_sort | Yongke Yang |
| collection | DOAJ |
| description | Urbanization has significantly changed thermal environments and vegetation phenology. However, the effects of spatially different land surface temperatures (LST) on vegetation phenology, rather than differences between urban areas and rural areas, remain unclear. In this study, four cities with similar vegetation types located in temperate monsoon climate zones were selected to map vegetation phenological metrics and discuss their responses to spatially heterogeneous LST within urban areas. First, Sentinel 2-A and 2-B data were used to estimate phenological metrics by combining Savitzky–Golay filtering, and Landsat 8 TIRS data was used to obtain LST. Second, buffer zones (from the urban center to the urban edge at 1 km intervals) were used to extract the averaged phenological metrics and LST. The response of the phenological metrics to LST from the urban center to the urban edge was then analyzed. Results show that spatial differences in LST and vegetation phenology exist inside urban regions as well as between urban and peri-urban areas. In addition, the response of phenology to LST within urban areas is also obvious. SOS is negatively related to spring LST from the urban center to the urban edge, whereas EOS is positively related to autumn LST. |
| first_indexed | 2024-03-11T11:22:11Z |
| format | Article |
| id | doaj.art-47d7631d4de04781ad51a59d27e8b93c |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T11:22:11Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-47d7631d4de04781ad51a59d27e8b93c2023-11-10T15:11:09ZengMDPI AGRemote Sensing2072-42922023-10-011521513310.3390/rs15215133Impacts of Thermal Differences in Surfacing Urban Heat Islands on Vegetation PhenologyYongke Yang0Xinyi Qiu1Liuming Yang2Dohyung Lee3Department of Geographic Information Science, Central South University of Forestry and Technology, Changsha 410004, ChinaDepartment of Geographic Information Science, Central South University of Forestry and Technology, Changsha 410004, ChinaSchool of Geographical Sciences, Hunan Normal University, Changsha 410081, ChinaKorea Research Institute on Climate Change, Chuncheon 24239, Republic of KoreaUrbanization has significantly changed thermal environments and vegetation phenology. However, the effects of spatially different land surface temperatures (LST) on vegetation phenology, rather than differences between urban areas and rural areas, remain unclear. In this study, four cities with similar vegetation types located in temperate monsoon climate zones were selected to map vegetation phenological metrics and discuss their responses to spatially heterogeneous LST within urban areas. First, Sentinel 2-A and 2-B data were used to estimate phenological metrics by combining Savitzky–Golay filtering, and Landsat 8 TIRS data was used to obtain LST. Second, buffer zones (from the urban center to the urban edge at 1 km intervals) were used to extract the averaged phenological metrics and LST. The response of the phenological metrics to LST from the urban center to the urban edge was then analyzed. Results show that spatial differences in LST and vegetation phenology exist inside urban regions as well as between urban and peri-urban areas. In addition, the response of phenology to LST within urban areas is also obvious. SOS is negatively related to spring LST from the urban center to the urban edge, whereas EOS is positively related to autumn LST.https://www.mdpi.com/2072-4292/15/21/5133start of growing seasonend of growing seasonland surface temperatureurban vegetationremote sensing |
| spellingShingle | Yongke Yang Xinyi Qiu Liuming Yang Dohyung Lee Impacts of Thermal Differences in Surfacing Urban Heat Islands on Vegetation Phenology Remote Sensing start of growing season end of growing season land surface temperature urban vegetation remote sensing |
| title | Impacts of Thermal Differences in Surfacing Urban Heat Islands on Vegetation Phenology |
| title_full | Impacts of Thermal Differences in Surfacing Urban Heat Islands on Vegetation Phenology |
| title_fullStr | Impacts of Thermal Differences in Surfacing Urban Heat Islands on Vegetation Phenology |
| title_full_unstemmed | Impacts of Thermal Differences in Surfacing Urban Heat Islands on Vegetation Phenology |
| title_short | Impacts of Thermal Differences in Surfacing Urban Heat Islands on Vegetation Phenology |
| title_sort | impacts of thermal differences in surfacing urban heat islands on vegetation phenology |
| topic | start of growing season end of growing season land surface temperature urban vegetation remote sensing |
| url | https://www.mdpi.com/2072-4292/15/21/5133 |
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