Decreased Sensitivity of Grassland Spring Phenology to Temperature on the Tibetan Plateau
Spring phenology is a critical indicator to characterize vegetation dynamics and their responses to climate change. Spring phenology on the Tibetan Plateau (TP) has received extensive attentions as it has experienced one of the most rapid warmings. Warming-induced advancement of spring phenology has...
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10107767/ |
| _version_ | 1827927920879861760 |
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| author | Zhangkai Chen Rui Chen Yajie Yang Huiqin Pan Qiaoyun Xie Cong Wang Baodong Xu Gaofei Yin |
| author_facet | Zhangkai Chen Rui Chen Yajie Yang Huiqin Pan Qiaoyun Xie Cong Wang Baodong Xu Gaofei Yin |
| author_sort | Zhangkai Chen |
| collection | DOAJ |
| description | Spring phenology is a critical indicator to characterize vegetation dynamics and their responses to climate change. Spring phenology on the Tibetan Plateau (TP) has received extensive attentions as it has experienced one of the most rapid warmings. Warming-induced advancement of spring phenology has been revealed by many studies, however, the underlying mechanisms remain obscure. In this article, we derived the start of growing season (SOS) from the satellite solar-induced chlorophyll fluorescence (SIF) and investigated the spatial and temporal variations of SOS over grasslands on the TP during 2001–2020. The temperature sensitivity (St) of SOS was then analyzed, i.e., the slope of a linear regression between the advanced SOS and preseason air temperature. Results showed an average advanced trend of 0.29 days per decade of SOS, although not statistically significant. Spatially, grasslands in eastern TP showed an earlier trend of SOS whilst those in western TP showed a later trend of SOS. The spatial distribution of St was much more affected by precipitation and air temperature, i.e., a 1 mm decrease of precipitation and 1 °C warming incur a decrease in St of 0.02 and 0.54 day/°C, respectively. Temporally, St showed a significant decrease with an average speed of 0.14 day/°C per year during 2001–2020, and the climate controllers show a high spatial heterogeneity. These findings improved our understanding of grasslands spring phenology responses to warming and help us clarify future global water and energy cycles. |
| first_indexed | 2024-03-13T06:00:02Z |
| format | Article |
| id | doaj.art-4d8a3a1694fa48bfb441f973248758e9 |
| institution | Directory Open Access Journal |
| issn | 2151-1535 |
| language | English |
| last_indexed | 2024-03-13T06:00:02Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj.art-4d8a3a1694fa48bfb441f973248758e92023-06-12T23:00:29ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing2151-15352023-01-01164371438210.1109/JSTARS.2023.326990810107767Decreased Sensitivity of Grassland Spring Phenology to Temperature on the Tibetan PlateauZhangkai Chen0https://orcid.org/0000-0001-7577-1166Rui Chen1https://orcid.org/0000-0002-7991-4926Yajie Yang2https://orcid.org/0000-0002-6425-0653Huiqin Pan3Qiaoyun Xie4https://orcid.org/0000-0002-1576-6610Cong Wang5https://orcid.org/0000-0002-1193-6862Baodong Xu6https://orcid.org/0000-0002-2068-8610Gaofei Yin7https://orcid.org/0000-0002-9828-7139Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, ChinaFaculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, ChinaFaculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, ChinaFaculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, ChinaSchool of Engineering, The University of Western Australia, Perth, WA, AustraliaKey Laboratory for Geographical Process Analysis & Simulation of Hubei Province/School of Urban and Environmental Sciences, Central China Normal University, Wuhan, ChinaMacro Agriculture Research Institute, College of Resources and Environment, Huazhong Agricultural University, Wuhan, ChinaFaculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, ChinaSpring phenology is a critical indicator to characterize vegetation dynamics and their responses to climate change. Spring phenology on the Tibetan Plateau (TP) has received extensive attentions as it has experienced one of the most rapid warmings. Warming-induced advancement of spring phenology has been revealed by many studies, however, the underlying mechanisms remain obscure. In this article, we derived the start of growing season (SOS) from the satellite solar-induced chlorophyll fluorescence (SIF) and investigated the spatial and temporal variations of SOS over grasslands on the TP during 2001–2020. The temperature sensitivity (St) of SOS was then analyzed, i.e., the slope of a linear regression between the advanced SOS and preseason air temperature. Results showed an average advanced trend of 0.29 days per decade of SOS, although not statistically significant. Spatially, grasslands in eastern TP showed an earlier trend of SOS whilst those in western TP showed a later trend of SOS. The spatial distribution of St was much more affected by precipitation and air temperature, i.e., a 1 mm decrease of precipitation and 1 °C warming incur a decrease in St of 0.02 and 0.54 day/°C, respectively. Temporally, St showed a significant decrease with an average speed of 0.14 day/°C per year during 2001–2020, and the climate controllers show a high spatial heterogeneity. These findings improved our understanding of grasslands spring phenology responses to warming and help us clarify future global water and energy cycles.https://ieeexplore.ieee.org/document/10107767/Solar-induced chlorophyll fluorescence (SIF)spring phenologytemperature sensitivity (St)Tibetan Plateau (TP) |
| spellingShingle | Zhangkai Chen Rui Chen Yajie Yang Huiqin Pan Qiaoyun Xie Cong Wang Baodong Xu Gaofei Yin Decreased Sensitivity of Grassland Spring Phenology to Temperature on the Tibetan Plateau IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Solar-induced chlorophyll fluorescence (SIF) spring phenology temperature sensitivity (St) Tibetan Plateau (TP) |
| title | Decreased Sensitivity of Grassland Spring Phenology to Temperature on the Tibetan Plateau |
| title_full | Decreased Sensitivity of Grassland Spring Phenology to Temperature on the Tibetan Plateau |
| title_fullStr | Decreased Sensitivity of Grassland Spring Phenology to Temperature on the Tibetan Plateau |
| title_full_unstemmed | Decreased Sensitivity of Grassland Spring Phenology to Temperature on the Tibetan Plateau |
| title_short | Decreased Sensitivity of Grassland Spring Phenology to Temperature on the Tibetan Plateau |
| title_sort | decreased sensitivity of grassland spring phenology to temperature on the tibetan plateau |
| topic | Solar-induced chlorophyll fluorescence (SIF) spring phenology temperature sensitivity (St) Tibetan Plateau (TP) |
| url | https://ieeexplore.ieee.org/document/10107767/ |
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