Understanding spatio-temporal variation of autumn phenology in temperate China from 1982 to 2018
Land surface phenology plays a crucial role in accurately parameterizing interactions between land ecosystems and the atmosphere. Changes in autumn phenology directly impact the length of vegetation growing season and year-to-year changes in carbon uptake. Previous studies have often focused solely...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-01-01
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| Series: | Frontiers in Ecology and Evolution |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fevo.2023.1332116/full |
| _version_ | 1797361306221674496 |
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| author | Shuai Wu Shuai Wu Wei Wu |
| author_facet | Shuai Wu Shuai Wu Wei Wu |
| author_sort | Shuai Wu |
| collection | DOAJ |
| description | Land surface phenology plays a crucial role in accurately parameterizing interactions between land ecosystems and the atmosphere. Changes in autumn phenology directly impact the length of vegetation growing season and year-to-year changes in carbon uptake. Previous studies have often focused solely on the end of growing season when characterizing autumn phenology, neglecting the onset and duration of autumn. Here, we extracted the annual autumn phenological metrics, i.e., the start of brown-down phase (SOB), the end of brown-down phase (EOB), and the length of brown-down phase (LOB), for temperate China from 1982 to 2018 based on our self-developed global LSP dataset. We conducted a comparative analysis of SOB, EOB, and LOB in the field of their spatial distribution, temporal trends, and performance on various categories of vegetated regions (i.e., forests, grasslands, croplands, and vegetated areas in urban lands (V_Urban)). The results showed a significant negative correlation between the timing of autumn phenological metrics and latitude in temperate China. Between 1982 and 2018, there were significant positive increasing trends in EOB and LOB in V_Urban, as well as in LOB in forests in temperate China. However, the annual mean SOB, EOB, and LOB did not show significant trends across the entire study area. At the local pixel scale, SOB, EOB, and LOB exhibited a combination of advanced and delayed trends within various vegetated categories. The trends of the same phenological metric were not uniform across these diverse vegetated regions. For instance, the majority of pixels with significant trends in SOB exhibited delayed trends in forests and croplands, while displaying advanced trends in grasslands and V_Urban. In this study, employing three metrics (SOB, EOB, and LOB) to describe autumn phenology enhances our understanding of the impacts of global climate change on ecosystems, offering a more comprehensive and detailed perspective. In the future, satellite-based monitoring and phenological modeling should contemplate incorporating additional potential phenological metrics. |
| first_indexed | 2024-03-08T15:51:59Z |
| format | Article |
| id | doaj.art-c1949a16fcd74733b4e3c6dc24729dd4 |
| institution | Directory Open Access Journal |
| issn | 2296-701X |
| language | English |
| last_indexed | 2024-03-08T15:51:59Z |
| publishDate | 2024-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Ecology and Evolution |
| spelling | doaj.art-c1949a16fcd74733b4e3c6dc24729dd42024-01-09T04:38:06ZengFrontiers Media S.A.Frontiers in Ecology and Evolution2296-701X2024-01-011110.3389/fevo.2023.13321161332116Understanding spatio-temporal variation of autumn phenology in temperate China from 1982 to 2018Shuai Wu0Shuai Wu1Wei Wu2Institute Of China Rural Studies, Central China Normal University, Wuhan, ChinaSchool of Public Administration, Central China Normal University, Wuhan, ChinaMining College, Guizhou University, Guiyang, Guizhou, ChinaLand surface phenology plays a crucial role in accurately parameterizing interactions between land ecosystems and the atmosphere. Changes in autumn phenology directly impact the length of vegetation growing season and year-to-year changes in carbon uptake. Previous studies have often focused solely on the end of growing season when characterizing autumn phenology, neglecting the onset and duration of autumn. Here, we extracted the annual autumn phenological metrics, i.e., the start of brown-down phase (SOB), the end of brown-down phase (EOB), and the length of brown-down phase (LOB), for temperate China from 1982 to 2018 based on our self-developed global LSP dataset. We conducted a comparative analysis of SOB, EOB, and LOB in the field of their spatial distribution, temporal trends, and performance on various categories of vegetated regions (i.e., forests, grasslands, croplands, and vegetated areas in urban lands (V_Urban)). The results showed a significant negative correlation between the timing of autumn phenological metrics and latitude in temperate China. Between 1982 and 2018, there were significant positive increasing trends in EOB and LOB in V_Urban, as well as in LOB in forests in temperate China. However, the annual mean SOB, EOB, and LOB did not show significant trends across the entire study area. At the local pixel scale, SOB, EOB, and LOB exhibited a combination of advanced and delayed trends within various vegetated categories. The trends of the same phenological metric were not uniform across these diverse vegetated regions. For instance, the majority of pixels with significant trends in SOB exhibited delayed trends in forests and croplands, while displaying advanced trends in grasslands and V_Urban. In this study, employing three metrics (SOB, EOB, and LOB) to describe autumn phenology enhances our understanding of the impacts of global climate change on ecosystems, offering a more comprehensive and detailed perspective. In the future, satellite-based monitoring and phenological modeling should contemplate incorporating additional potential phenological metrics.https://www.frontiersin.org/articles/10.3389/fevo.2023.1332116/fullautumn phenologythe start of brown-down phase (SOB)the end of brown-down phase (EOB)the length of brown-down phase (LOB)temporal trendstemperate China |
| spellingShingle | Shuai Wu Shuai Wu Wei Wu Understanding spatio-temporal variation of autumn phenology in temperate China from 1982 to 2018 Frontiers in Ecology and Evolution autumn phenology the start of brown-down phase (SOB) the end of brown-down phase (EOB) the length of brown-down phase (LOB) temporal trends temperate China |
| title | Understanding spatio-temporal variation of autumn phenology in temperate China from 1982 to 2018 |
| title_full | Understanding spatio-temporal variation of autumn phenology in temperate China from 1982 to 2018 |
| title_fullStr | Understanding spatio-temporal variation of autumn phenology in temperate China from 1982 to 2018 |
| title_full_unstemmed | Understanding spatio-temporal variation of autumn phenology in temperate China from 1982 to 2018 |
| title_short | Understanding spatio-temporal variation of autumn phenology in temperate China from 1982 to 2018 |
| title_sort | understanding spatio temporal variation of autumn phenology in temperate china from 1982 to 2018 |
| topic | autumn phenology the start of brown-down phase (SOB) the end of brown-down phase (EOB) the length of brown-down phase (LOB) temporal trends temperate China |
| url | https://www.frontiersin.org/articles/10.3389/fevo.2023.1332116/full |
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