Divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the Tibetan Plateau
Abstract Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing climate. However, the effects of different intensities of extreme climatic events on vegetation phenology remain poorly under...
Ausführliche Beschreibung
Autor*in: |
Sun, Mai [verfasserIn] |
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E-Artikel |
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Sprache: |
Englisch |
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2023 |
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Anmerkung: |
© Science China Press 2023 |
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Übergeordnetes Werk: |
Enthalten in: Science in China - Heidelberg : Springer, 1997, 66(2023), 10 vom: 18. Sept., Seite 2200-2210 |
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Übergeordnetes Werk: |
volume:66 ; year:2023 ; number:10 ; day:18 ; month:09 ; pages:2200-2210 |
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DOI / URN: |
10.1007/s11430-022-1156-1 |
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Katalog-ID: |
SPR053295153 |
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520 | |a Abstract Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing climate. However, the effects of different intensities of extreme climatic events on vegetation phenology remain poorly understood. Using a long-term solar-induced chlorophyll fluorescence dataset, we investigated the response of vegetation phenology to extreme temperatures and precipitation events of different intensities across the Tibetan Plateau (TP) from 2000 to 2018. We found that the effect of maximum temperature exposure days ($ T_{x} $ED) and minimum temperature exposure days ($ T_{n} $ED) on the start of the growing season (SOS) was initially delayed and shifted to advance along the increasing temperature gradients. However, the response of the end of the growing season (EOS) to $ T_{x} $ED and $ T_{n} $ED shifted from an advance to a delay with increasing temperature gradients until the temperature thresholds were reached, above which thresholds produced an unfavorable response to vegetation growth and brought the EOS to an early end. The corresponding maximum and minimum temperature thresholds were 10.12 and 2.54°C, respectively. In contrast, cumulative precipitation (CP) was more likely to advance SOS and delay EOS as the precipitation gradient increased, but the advance of SOS is gradually weakening. Four vegetation types (i.e., forest, shrubland, meadow, and steppe) showed similar trends in response to different climates, but the optimal climatic conditions varied between the vegetation types. Generally, meadow and steppe had lower optimal temperatures and precipitation than forest and shrubland. These findings revealed the divergent responses of vegetation phenology to extreme climate events of different intensities, implying that the SOS will continue to advance with warming, whereas the EOS may undergo a partial transformation from delayed areas to advanced areas with continued warming. | ||
650 | 4 | |a Vegetation phenology |7 (dpeaa)DE-He213 | |
650 | 4 | |a Extreme climates |7 (dpeaa)DE-He213 | |
650 | 4 | |a Optimal climate |7 (dpeaa)DE-He213 | |
650 | 4 | |a Solar-induced chlorophyll fluorescence |7 (dpeaa)DE-He213 | |
650 | 4 | |a Tibetan Plateau |7 (dpeaa)DE-He213 | |
700 | 1 | |a Li, Peng |4 aut | |
700 | 1 | |a Ren, Peixin |4 aut | |
700 | 1 | |a Tang, Jiayi |4 aut | |
700 | 1 | |a Zhang, Cicheng |4 aut | |
700 | 1 | |a Zhou, Xiaolu |4 aut | |
700 | 1 | |a Peng, Changhui |4 aut | |
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10.1007/s11430-022-1156-1 doi (DE-627)SPR053295153 (SPR)s11430-022-1156-1-e DE-627 ger DE-627 rakwb eng Sun, Mai verfasserin aut Divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the Tibetan Plateau 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Science China Press 2023 Abstract Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing climate. However, the effects of different intensities of extreme climatic events on vegetation phenology remain poorly understood. Using a long-term solar-induced chlorophyll fluorescence dataset, we investigated the response of vegetation phenology to extreme temperatures and precipitation events of different intensities across the Tibetan Plateau (TP) from 2000 to 2018. We found that the effect of maximum temperature exposure days ($ T_{x} $ED) and minimum temperature exposure days ($ T_{n} $ED) on the start of the growing season (SOS) was initially delayed and shifted to advance along the increasing temperature gradients. However, the response of the end of the growing season (EOS) to $ T_{x} $ED and $ T_{n} $ED shifted from an advance to a delay with increasing temperature gradients until the temperature thresholds were reached, above which thresholds produced an unfavorable response to vegetation growth and brought the EOS to an early end. The corresponding maximum and minimum temperature thresholds were 10.12 and 2.54°C, respectively. In contrast, cumulative precipitation (CP) was more likely to advance SOS and delay EOS as the precipitation gradient increased, but the advance of SOS is gradually weakening. Four vegetation types (i.e., forest, shrubland, meadow, and steppe) showed similar trends in response to different climates, but the optimal climatic conditions varied between the vegetation types. Generally, meadow and steppe had lower optimal temperatures and precipitation than forest and shrubland. These findings revealed the divergent responses of vegetation phenology to extreme climate events of different intensities, implying that the SOS will continue to advance with warming, whereas the EOS may undergo a partial transformation from delayed areas to advanced areas with continued warming. Vegetation phenology (dpeaa)DE-He213 Extreme climates (dpeaa)DE-He213 Optimal climate (dpeaa)DE-He213 Solar-induced chlorophyll fluorescence (dpeaa)DE-He213 Tibetan Plateau (dpeaa)DE-He213 Li, Peng aut Ren, Peixin aut Tang, Jiayi aut Zhang, Cicheng aut Zhou, Xiaolu aut Peng, Changhui aut Enthalten in Science in China Heidelberg : Springer, 1997 66(2023), 10 vom: 18. Sept., Seite 2200-2210 (DE-627)385614748 (DE-600)2142896-7 1862-2801 nnns volume:66 year:2023 number:10 day:18 month:09 pages:2200-2210 https://dx.doi.org/10.1007/s11430-022-1156-1 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 66 2023 10 18 09 2200-2210 |
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10.1007/s11430-022-1156-1 doi (DE-627)SPR053295153 (SPR)s11430-022-1156-1-e DE-627 ger DE-627 rakwb eng Sun, Mai verfasserin aut Divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the Tibetan Plateau 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Science China Press 2023 Abstract Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing climate. However, the effects of different intensities of extreme climatic events on vegetation phenology remain poorly understood. Using a long-term solar-induced chlorophyll fluorescence dataset, we investigated the response of vegetation phenology to extreme temperatures and precipitation events of different intensities across the Tibetan Plateau (TP) from 2000 to 2018. We found that the effect of maximum temperature exposure days ($ T_{x} $ED) and minimum temperature exposure days ($ T_{n} $ED) on the start of the growing season (SOS) was initially delayed and shifted to advance along the increasing temperature gradients. However, the response of the end of the growing season (EOS) to $ T_{x} $ED and $ T_{n} $ED shifted from an advance to a delay with increasing temperature gradients until the temperature thresholds were reached, above which thresholds produced an unfavorable response to vegetation growth and brought the EOS to an early end. The corresponding maximum and minimum temperature thresholds were 10.12 and 2.54°C, respectively. In contrast, cumulative precipitation (CP) was more likely to advance SOS and delay EOS as the precipitation gradient increased, but the advance of SOS is gradually weakening. Four vegetation types (i.e., forest, shrubland, meadow, and steppe) showed similar trends in response to different climates, but the optimal climatic conditions varied between the vegetation types. Generally, meadow and steppe had lower optimal temperatures and precipitation than forest and shrubland. These findings revealed the divergent responses of vegetation phenology to extreme climate events of different intensities, implying that the SOS will continue to advance with warming, whereas the EOS may undergo a partial transformation from delayed areas to advanced areas with continued warming. Vegetation phenology (dpeaa)DE-He213 Extreme climates (dpeaa)DE-He213 Optimal climate (dpeaa)DE-He213 Solar-induced chlorophyll fluorescence (dpeaa)DE-He213 Tibetan Plateau (dpeaa)DE-He213 Li, Peng aut Ren, Peixin aut Tang, Jiayi aut Zhang, Cicheng aut Zhou, Xiaolu aut Peng, Changhui aut Enthalten in Science in China Heidelberg : Springer, 1997 66(2023), 10 vom: 18. Sept., Seite 2200-2210 (DE-627)385614748 (DE-600)2142896-7 1862-2801 nnns volume:66 year:2023 number:10 day:18 month:09 pages:2200-2210 https://dx.doi.org/10.1007/s11430-022-1156-1 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 66 2023 10 18 09 2200-2210 |
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10.1007/s11430-022-1156-1 doi (DE-627)SPR053295153 (SPR)s11430-022-1156-1-e DE-627 ger DE-627 rakwb eng Sun, Mai verfasserin aut Divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the Tibetan Plateau 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Science China Press 2023 Abstract Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing climate. However, the effects of different intensities of extreme climatic events on vegetation phenology remain poorly understood. Using a long-term solar-induced chlorophyll fluorescence dataset, we investigated the response of vegetation phenology to extreme temperatures and precipitation events of different intensities across the Tibetan Plateau (TP) from 2000 to 2018. We found that the effect of maximum temperature exposure days ($ T_{x} $ED) and minimum temperature exposure days ($ T_{n} $ED) on the start of the growing season (SOS) was initially delayed and shifted to advance along the increasing temperature gradients. However, the response of the end of the growing season (EOS) to $ T_{x} $ED and $ T_{n} $ED shifted from an advance to a delay with increasing temperature gradients until the temperature thresholds were reached, above which thresholds produced an unfavorable response to vegetation growth and brought the EOS to an early end. The corresponding maximum and minimum temperature thresholds were 10.12 and 2.54°C, respectively. In contrast, cumulative precipitation (CP) was more likely to advance SOS and delay EOS as the precipitation gradient increased, but the advance of SOS is gradually weakening. Four vegetation types (i.e., forest, shrubland, meadow, and steppe) showed similar trends in response to different climates, but the optimal climatic conditions varied between the vegetation types. Generally, meadow and steppe had lower optimal temperatures and precipitation than forest and shrubland. These findings revealed the divergent responses of vegetation phenology to extreme climate events of different intensities, implying that the SOS will continue to advance with warming, whereas the EOS may undergo a partial transformation from delayed areas to advanced areas with continued warming. Vegetation phenology (dpeaa)DE-He213 Extreme climates (dpeaa)DE-He213 Optimal climate (dpeaa)DE-He213 Solar-induced chlorophyll fluorescence (dpeaa)DE-He213 Tibetan Plateau (dpeaa)DE-He213 Li, Peng aut Ren, Peixin aut Tang, Jiayi aut Zhang, Cicheng aut Zhou, Xiaolu aut Peng, Changhui aut Enthalten in Science in China Heidelberg : Springer, 1997 66(2023), 10 vom: 18. Sept., Seite 2200-2210 (DE-627)385614748 (DE-600)2142896-7 1862-2801 nnns volume:66 year:2023 number:10 day:18 month:09 pages:2200-2210 https://dx.doi.org/10.1007/s11430-022-1156-1 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 66 2023 10 18 09 2200-2210 |
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10.1007/s11430-022-1156-1 doi (DE-627)SPR053295153 (SPR)s11430-022-1156-1-e DE-627 ger DE-627 rakwb eng Sun, Mai verfasserin aut Divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the Tibetan Plateau 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Science China Press 2023 Abstract Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing climate. However, the effects of different intensities of extreme climatic events on vegetation phenology remain poorly understood. Using a long-term solar-induced chlorophyll fluorescence dataset, we investigated the response of vegetation phenology to extreme temperatures and precipitation events of different intensities across the Tibetan Plateau (TP) from 2000 to 2018. We found that the effect of maximum temperature exposure days ($ T_{x} $ED) and minimum temperature exposure days ($ T_{n} $ED) on the start of the growing season (SOS) was initially delayed and shifted to advance along the increasing temperature gradients. However, the response of the end of the growing season (EOS) to $ T_{x} $ED and $ T_{n} $ED shifted from an advance to a delay with increasing temperature gradients until the temperature thresholds were reached, above which thresholds produced an unfavorable response to vegetation growth and brought the EOS to an early end. The corresponding maximum and minimum temperature thresholds were 10.12 and 2.54°C, respectively. In contrast, cumulative precipitation (CP) was more likely to advance SOS and delay EOS as the precipitation gradient increased, but the advance of SOS is gradually weakening. Four vegetation types (i.e., forest, shrubland, meadow, and steppe) showed similar trends in response to different climates, but the optimal climatic conditions varied between the vegetation types. Generally, meadow and steppe had lower optimal temperatures and precipitation than forest and shrubland. These findings revealed the divergent responses of vegetation phenology to extreme climate events of different intensities, implying that the SOS will continue to advance with warming, whereas the EOS may undergo a partial transformation from delayed areas to advanced areas with continued warming. Vegetation phenology (dpeaa)DE-He213 Extreme climates (dpeaa)DE-He213 Optimal climate (dpeaa)DE-He213 Solar-induced chlorophyll fluorescence (dpeaa)DE-He213 Tibetan Plateau (dpeaa)DE-He213 Li, Peng aut Ren, Peixin aut Tang, Jiayi aut Zhang, Cicheng aut Zhou, Xiaolu aut Peng, Changhui aut Enthalten in Science in China Heidelberg : Springer, 1997 66(2023), 10 vom: 18. Sept., Seite 2200-2210 (DE-627)385614748 (DE-600)2142896-7 1862-2801 nnns volume:66 year:2023 number:10 day:18 month:09 pages:2200-2210 https://dx.doi.org/10.1007/s11430-022-1156-1 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 66 2023 10 18 09 2200-2210 |
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10.1007/s11430-022-1156-1 doi (DE-627)SPR053295153 (SPR)s11430-022-1156-1-e DE-627 ger DE-627 rakwb eng Sun, Mai verfasserin aut Divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the Tibetan Plateau 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Science China Press 2023 Abstract Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing climate. However, the effects of different intensities of extreme climatic events on vegetation phenology remain poorly understood. Using a long-term solar-induced chlorophyll fluorescence dataset, we investigated the response of vegetation phenology to extreme temperatures and precipitation events of different intensities across the Tibetan Plateau (TP) from 2000 to 2018. We found that the effect of maximum temperature exposure days ($ T_{x} $ED) and minimum temperature exposure days ($ T_{n} $ED) on the start of the growing season (SOS) was initially delayed and shifted to advance along the increasing temperature gradients. However, the response of the end of the growing season (EOS) to $ T_{x} $ED and $ T_{n} $ED shifted from an advance to a delay with increasing temperature gradients until the temperature thresholds were reached, above which thresholds produced an unfavorable response to vegetation growth and brought the EOS to an early end. The corresponding maximum and minimum temperature thresholds were 10.12 and 2.54°C, respectively. In contrast, cumulative precipitation (CP) was more likely to advance SOS and delay EOS as the precipitation gradient increased, but the advance of SOS is gradually weakening. Four vegetation types (i.e., forest, shrubland, meadow, and steppe) showed similar trends in response to different climates, but the optimal climatic conditions varied between the vegetation types. Generally, meadow and steppe had lower optimal temperatures and precipitation than forest and shrubland. These findings revealed the divergent responses of vegetation phenology to extreme climate events of different intensities, implying that the SOS will continue to advance with warming, whereas the EOS may undergo a partial transformation from delayed areas to advanced areas with continued warming. Vegetation phenology (dpeaa)DE-He213 Extreme climates (dpeaa)DE-He213 Optimal climate (dpeaa)DE-He213 Solar-induced chlorophyll fluorescence (dpeaa)DE-He213 Tibetan Plateau (dpeaa)DE-He213 Li, Peng aut Ren, Peixin aut Tang, Jiayi aut Zhang, Cicheng aut Zhou, Xiaolu aut Peng, Changhui aut Enthalten in Science in China Heidelberg : Springer, 1997 66(2023), 10 vom: 18. Sept., Seite 2200-2210 (DE-627)385614748 (DE-600)2142896-7 1862-2801 nnns volume:66 year:2023 number:10 day:18 month:09 pages:2200-2210 https://dx.doi.org/10.1007/s11430-022-1156-1 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 66 2023 10 18 09 2200-2210 |
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Divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the Tibetan Plateau Vegetation phenology (dpeaa)DE-He213 Extreme climates (dpeaa)DE-He213 Optimal climate (dpeaa)DE-He213 Solar-induced chlorophyll fluorescence (dpeaa)DE-He213 Tibetan Plateau (dpeaa)DE-He213 |
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divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the tibetan plateau |
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Divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the Tibetan Plateau |
abstract |
Abstract Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing climate. However, the effects of different intensities of extreme climatic events on vegetation phenology remain poorly understood. Using a long-term solar-induced chlorophyll fluorescence dataset, we investigated the response of vegetation phenology to extreme temperatures and precipitation events of different intensities across the Tibetan Plateau (TP) from 2000 to 2018. We found that the effect of maximum temperature exposure days ($ T_{x} $ED) and minimum temperature exposure days ($ T_{n} $ED) on the start of the growing season (SOS) was initially delayed and shifted to advance along the increasing temperature gradients. However, the response of the end of the growing season (EOS) to $ T_{x} $ED and $ T_{n} $ED shifted from an advance to a delay with increasing temperature gradients until the temperature thresholds were reached, above which thresholds produced an unfavorable response to vegetation growth and brought the EOS to an early end. The corresponding maximum and minimum temperature thresholds were 10.12 and 2.54°C, respectively. In contrast, cumulative precipitation (CP) was more likely to advance SOS and delay EOS as the precipitation gradient increased, but the advance of SOS is gradually weakening. Four vegetation types (i.e., forest, shrubland, meadow, and steppe) showed similar trends in response to different climates, but the optimal climatic conditions varied between the vegetation types. Generally, meadow and steppe had lower optimal temperatures and precipitation than forest and shrubland. These findings revealed the divergent responses of vegetation phenology to extreme climate events of different intensities, implying that the SOS will continue to advance with warming, whereas the EOS may undergo a partial transformation from delayed areas to advanced areas with continued warming. © Science China Press 2023 |
abstractGer |
Abstract Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing climate. However, the effects of different intensities of extreme climatic events on vegetation phenology remain poorly understood. Using a long-term solar-induced chlorophyll fluorescence dataset, we investigated the response of vegetation phenology to extreme temperatures and precipitation events of different intensities across the Tibetan Plateau (TP) from 2000 to 2018. We found that the effect of maximum temperature exposure days ($ T_{x} $ED) and minimum temperature exposure days ($ T_{n} $ED) on the start of the growing season (SOS) was initially delayed and shifted to advance along the increasing temperature gradients. However, the response of the end of the growing season (EOS) to $ T_{x} $ED and $ T_{n} $ED shifted from an advance to a delay with increasing temperature gradients until the temperature thresholds were reached, above which thresholds produced an unfavorable response to vegetation growth and brought the EOS to an early end. The corresponding maximum and minimum temperature thresholds were 10.12 and 2.54°C, respectively. In contrast, cumulative precipitation (CP) was more likely to advance SOS and delay EOS as the precipitation gradient increased, but the advance of SOS is gradually weakening. Four vegetation types (i.e., forest, shrubland, meadow, and steppe) showed similar trends in response to different climates, but the optimal climatic conditions varied between the vegetation types. Generally, meadow and steppe had lower optimal temperatures and precipitation than forest and shrubland. These findings revealed the divergent responses of vegetation phenology to extreme climate events of different intensities, implying that the SOS will continue to advance with warming, whereas the EOS may undergo a partial transformation from delayed areas to advanced areas with continued warming. © Science China Press 2023 |
abstract_unstemmed |
Abstract Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing climate. However, the effects of different intensities of extreme climatic events on vegetation phenology remain poorly understood. Using a long-term solar-induced chlorophyll fluorescence dataset, we investigated the response of vegetation phenology to extreme temperatures and precipitation events of different intensities across the Tibetan Plateau (TP) from 2000 to 2018. We found that the effect of maximum temperature exposure days ($ T_{x} $ED) and minimum temperature exposure days ($ T_{n} $ED) on the start of the growing season (SOS) was initially delayed and shifted to advance along the increasing temperature gradients. However, the response of the end of the growing season (EOS) to $ T_{x} $ED and $ T_{n} $ED shifted from an advance to a delay with increasing temperature gradients until the temperature thresholds were reached, above which thresholds produced an unfavorable response to vegetation growth and brought the EOS to an early end. The corresponding maximum and minimum temperature thresholds were 10.12 and 2.54°C, respectively. In contrast, cumulative precipitation (CP) was more likely to advance SOS and delay EOS as the precipitation gradient increased, but the advance of SOS is gradually weakening. Four vegetation types (i.e., forest, shrubland, meadow, and steppe) showed similar trends in response to different climates, but the optimal climatic conditions varied between the vegetation types. Generally, meadow and steppe had lower optimal temperatures and precipitation than forest and shrubland. These findings revealed the divergent responses of vegetation phenology to extreme climate events of different intensities, implying that the SOS will continue to advance with warming, whereas the EOS may undergo a partial transformation from delayed areas to advanced areas with continued warming. © Science China Press 2023 |
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Divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the Tibetan Plateau |
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The corresponding maximum and minimum temperature thresholds were 10.12 and 2.54°C, respectively. In contrast, cumulative precipitation (CP) was more likely to advance SOS and delay EOS as the precipitation gradient increased, but the advance of SOS is gradually weakening. Four vegetation types (i.e., forest, shrubland, meadow, and steppe) showed similar trends in response to different climates, but the optimal climatic conditions varied between the vegetation types. Generally, meadow and steppe had lower optimal temperatures and precipitation than forest and shrubland. 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