Temporal Changes in Coupled Vegetation Phenology and Productivity are Biome-Specific in the Northern Hemisphere

Wang, Lanhui; Fensholt, Rasmus

doi:10.3390/rs9121277

Cited by 23 publications

(9 citation statements)

References 77 publications

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“…Jeong et al [17] found that the SOS advanced by 5.2 days during the early period of 1982-1999 in the NH, but this magnitude reduced to only 0.2 days in the later period of 2000-2008. Meanwhile, Wang and Fensholt [18] reported that changes in the SOS were biome-specific in the NH (>30 • N) during 1982-2013, indicating complex relationships and interactions that are induced by ongoing climate change and increasingly intensive human disturbances. At the regional scale, SOS anomalies in high latitudes, including the Arctic and boreal ecosystems [19][20][21] and Europe [22][23][24], and middle latitudes, including eastern China [25] and the Tibetan Plateau [26][27][28], have been explored separately.…”

Section: Introductionmentioning

confidence: 99%

Distribution and Attribution of Earlier Start of the Growing Season over the Northern Hemisphere from 2001–2018

Chen

Yang

2022

Remote Sensing

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The start of the growing season (SOS) is a vital ecological indicator for climate change and the terrestrial ecosystem. Previous studies have reported that the SOS over the Northern Hemisphere (NH) has experienced remarkable changes in the past few decades. However, because of the different spatial and temporal coverages of existing SOS studies, a coherent and robust account for SOS changes in the NH has been lacking. Using satellite-retrieved vegetation-phenology datasets, ground observations, and several auxiliary datasets, this study evaluated the performance of the latest MODIS vegetation-dynamics dataset (MCD12Q2-C6) and explored the distribution and attribution of the SOS to climate change over the NH for the period 2001–2018. The validation results using the Chinese Ecosystem Research Network (CERN) and Lilac-leafing observations (Lilac) displayed that the MCD12Q2-C6 has a good performance in SOS monitoring over the NH mid-latitudes. Meanwhile, evidence from MCD12Q2-C6 pointed out that the SOS was advanced by 2.08 days on average over the NH during 2001–2018, especially for Europe, China, and Alaska, United States. In addition, detailed-sensitivity analysis showed that the increased surface air temperature (Ts) (−1.21 ± 0.34 days °C−1) and reduced snow-cover fraction (Sc) (0.62 ± 0.29 days%−1) were the key driving factors of the observed SOS changes over the NH during 2001–2018. Compared with Ts and Sc, the role of total precipitation (Pt) was minor in dominating the spring vegetation-phenology changes at the same period. The findings of this study contribute to our understanding of the responses of SOS to the competing changes of Ts, Pt, and Sc over the NH.

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Section: Introductionmentioning

confidence: 99%

Distribution and Attribution of Earlier Start of the Growing Season over the Northern Hemisphere from 2001–2018

Chen

Yang

2022

Remote Sensing

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“…Concepts like biomes (developed throughout this review and defined under Final remarks), ecozones, and formations have described such distributions at the regional and global scale due to the importance of this global scale for conservation biology (Chytrý et al 2020) and answering basic ecological questions (Mucina 2019). For example, the biome concept has been used to examine diversity-productivity (Madrigal-González et al 2020) and species-area (e.g., see Dengler et al 2020) relationships, quantify temporal dynamics (Wang and Fensholt 2017), model historical distributions and shifts following climate change (Rowland et al 2016),…”

Section: Introductionmentioning

confidence: 99%

Terrestrial biomes: a conceptual review

Hunter¹,

Franklin²,

Luxton³

et al. 2021

VCS

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Aims: We attempt to review the conceptualisation, science and classification of biomes and propose to limit the definition of a biome to potential natural vegetation as determined by general environmental variables. Results: Classifying the distribution and abundance of vegetation types on earth has been a central tenet of vegetation science since Humboldt’s classic studies in the early 1800s. While the importance of such classifications only grows in the wake of extreme changes, this review demonstrates that there are many fundamentally different approaches to define biomes, hitherto with limited efforts for unifying concepts among disciplines. Consequently, there is little congruence between the resulting maps, and widely used biome maps fail to delimit areas with consistent climate profiles. Conclusions: Gaps of knowledge are directly related to research avenues, and suggestions for defining and classifying biomes, as well as modelling their distributions, are provided. These suggestions highlight the primary importance of the climate, argue against using anthropogenic drivers to define biomes and stabilize the concept of biome to escape from the current polysemy. The last two decades have seen an emergence of new approaches, e.g., using satellite imagery to determine growth patterns of vegetation, leading to defining biomes based on the objective, observable qualities of the vegetation based on current reality.

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“…Jeong et al (2011 concluded that the SOS advanced by 5.2 d in the early period (1982)(1983)(1984)(1985)(1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999) but advanced by only 0.2 d in the later period (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008) over the NH. Wang and Fensholt (2017) reported that temporal changes in coupled vegetation phenology and productivity are biome-specific in the NH, which indicates complex relationships and interactions between vegetation phenology and productivity. At regional scales, vegetation phenology changes in Fennoscandia (Menzel and Fabian 1999, Bogaert et al 2002, Fu et al 2014 have been separately studied.…”

Section: Introductionmentioning

confidence: 99%

Observed earlier start of the growing season from middle to high latitudes across the Northern Hemisphere snow-covered landmass for the period 2001–2014

Chen

Yang

2020

Environ. Res. Lett.

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Vegetation phenology in spring has received much attention for its importance to terrestrial ecosystem carbon exchange and climate-biosphere interactions studies. Through control on surface water and heat balance, snow cover largely impacts on spring vegetation phenology. However, under the background of global warming and rapid reduction of spring snow cover extent across the Northern Hemisphere (NH), the responses of spring vegetation phenology have not been well documented. Using two satellite-derived land cover dynamic datasets and 420 in situ vegetation phenology observations from five filed datasets, this study evaluated the accuracy of satellite-derived vegetation phenology datasets and explored the changes of start of the growing season (SOS) across the NH snow-covered landmass for the period 2001-2014. Compared with MEaSUREs VIPPHEN, the MODIS SOS maps displayed higher accuracy in capture the real SOS climatology by validating with in situ observations (R 2 =0.67, bias=−3.99 d). Moreover, evidences from MODIS SOS maps pointed out that the SOS advanced by approximately 2.36 d in NH middle to high latitudes (43.5°N-70.0°N), but delayed by about 0.53 d in lower latitudes (33.0°N-43.5°N) from 2001 to 2014. The contrast SOS anomalies across the NH snow-covered landmass were further proved by changes in spring NDVI derived from GIMMS in the corresponding period. In addition, the observed changes in SOS were consistent with the spatiotemporal pattern of spring snow end date found in previous studies, indicating vegetation phenology changes should be taken into account in estimating the impacts of snow in climate-biosphere interactions studies.

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Temporal Changes in Coupled Vegetation Phenology and Productivity are Biome-Specific in the Northern Hemisphere

Cited by 23 publications

References 77 publications

Distribution and Attribution of Earlier Start of the Growing Season over the Northern Hemisphere from 2001–2018

Distribution and Attribution of Earlier Start of the Growing Season over the Northern Hemisphere from 2001–2018

Terrestrial biomes: a conceptual review

Observed earlier start of the growing season from middle to high latitudes across the Northern Hemisphere snow-covered landmass for the period 2001–2014

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