Slowdown of spring green-up advancements in boreal forests

Park, Hoonyoung; Jeong, Su‐Jong; Ho, Chang-Hoi; Park, Chang‐Eui; Kim, Jinwon

doi:10.1016/j.rse.2018.08.012

Cited by 45 publications

(38 citation statements)

References 57 publications

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“…The ERA5 data were harmonized to the spatial resolution of the LAI dataset using nearest-neighbor interpolation to ensure consistency in analyses (Park et al, 2018).…”

Section: Climate Reanalysis and Carbon Dioxide Concentrationsmentioning

confidence: 99%

“…RVG was expressed by a linear combination of the six variables using the above equation with an error term, ε(t an assumption of linearity (Park et al, 2018). We used the six environmental variables and linear decomposition to examine the long-term RVG trends and their causes in the regions in recent decades.…”

Section: Multivariable Linear Regressionmentioning

confidence: 99%

“…and spaceborne remote sensing of the continents (Badeck et al, 2004;Jeong et al, 2011;Park et al, 2018) have revealed that the beginning of growing seasons has advanced over the last few decades in the northern extratropics. In addition to earlier springs, vegetation maturity, that is, the peak of growing seasons, has advanced at northern mid-and high latitudes when compared to earlier decades (Gonsamo et al, 2018;Xu et al, 2016).…”

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confidence: 99%

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Accelerated rate of vegetation green‐up related to warming at northern high latitudes

Park

Jeong

Peñuelas

2020

Global Change Biology

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“…The ERA5 data were harmonized to the spatial resolution of the LAI dataset using nearest-neighbor interpolation to ensure consistency in analyses (Park et al, 2018).…”

Section: Climate Reanalysis and Carbon Dioxide Concentrationsmentioning

confidence: 99%

Section: Multivariable Linear Regressionmentioning

confidence: 99%

mentioning

confidence: 99%

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Accelerated rate of vegetation green‐up related to warming at northern high latitudes

Park

Jeong

Peñuelas

2020

Global Change Biology

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“…The delayed arrival of SOS and the earlier autumn senescence jointly control the shortening of the overall vegetation growing season over NEC. Recent studies have also suggested that the inherently short spring greenup period of northern vegetation will limit its ability to advance further [48,49]. On the other hand, the warming-induced drought stress in autumn will adversely affect the persistence of a delayed end of the growing season [48,49].…”

Section: Plant Phenological Changes Over Necmentioning

confidence: 99%

“…Recent studies have also suggested that the inherently short spring greenup period of northern vegetation will limit its ability to advance further [48,49]. On the other hand, the warming-induced drought stress in autumn will adversely affect the persistence of a delayed end of the growing season [48,49]. The slowing of the SOS advancement since the early 2000s has been well documented over some regions in the Northern Hemisphere, such as Siberia and the Tibetan Plateau [50,51].…”

Section: Plant Phenological Changes Over Necmentioning

confidence: 99%

Relative Contribution of Growing Season Length and Amplitude to Long-Term Trend and Interannual Variability of Vegetation Productivity over Northeast China

Zhou

2020

Forests

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In the context of global warming, the terrestrial ecosystem productivity over the Northern Hemisphere presents a substantially enhanced trend. The magnitude of summer vegetation maximum growth, known as peak growth, remains only partially understood for its role in regulating changes in vegetation productivity. This study aimed to estimate the spatiotemporal dynamics of the length of growing season (LOS) and maximum growth magnitude (MAG) over Northeast China (NEC) using a long-term satellite record of normalized difference vegetation index (NDVI) for the period 1982–2015, and quantifying their relative contribution to the long-term trend and inter-annual variability (IAV) of vegetation productivity. Firstly, the key phenological metrics, including MAG and start and end of growing season (SOS, EOS), were derived. Secondly, growing season vegetation productivity, measured as the Summary of Vegetation Index (VIsum), was obtained by cumulating NDVI values. Thirdly, the relative impacts of LOS and MAG on the trend and IAV in VIsum were explored using the relative importance (RI) method at pixel and vegetation cover type level. For the entire NEC, LOS, and MAG exhibited a slightly decreasing trend and a weak increasing trend, respectively, thus resulting in an insignificant change in VIsum. The temporal phases of VIsum presented a consistent pace with LOS, but changed asynchronously with MAG. There was an underlying cycle of about 10 years in the changes of LOS, MAG, and VIsum. At a regional scale, VIsum tended to maintain a rising trend in the northern coniferous forest and grassland in western and southern NEC. The spatial distribution of the temporal trends of LOS and MAG generally show a contrasting pattern, in which LOS duration is expected to shorten (negative trend) in the central cropland and in some southwestern grasslands (81.5% of the vegetated area), while MAG would increase (positive trend) in croplands, southern grasslands, and northern coniferous forests (16.5%). The correlation index for the entire NEC suggested that LOS was negatively associated with MAG, indicating that the extended vegetation growth duration would result in a lower growth peak and vice versa. Across the various vegetation types, LOS was a substantial factor in controlling both the trend and IAV of VIsum (RI = 75%). There was an opposite spatial pattern in the relative contribution of LOS and MAG to VIsum, where LOS dominated in the northern coniferous forests and in the eastern broadleaf forests, with MAG mainly impacting croplands and the western grasslands (RI = 27%). Although LOS was still the key factor controlling the trend and IAV of VIsum during the study period, this situation may change in the case peak growth amplitude gradually increases in the future.

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The important role of soil moisture in controlling autumn phenology of herbaceous plants in the Inner Mongolian steppe

Tao

Wang

et al. 2020

Land Degrad Dev

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Autumn phenology variation in temperate grassland is a direct indicator of land degradation, and a phenology‐based model has been used to simulate human‐induced land degradation. It is important to reveal how environmental factors influence autumn phenology of herbaceous plants. In this study, we examined the effects of temperature, photoperiod, and soil moisture on the leaf withering date (LWD) of four herbaceous species (Xanthium sibiricum, Plantago asiatica, Iris lactea, and Taraxacum mongolicum) at 15 sites in the Inner Mongolian steppe from 1981 to 2012. Then, we developed two process‐based models coupling the effects of the three factors based on an existing cold degree–days (CDD)‐based model for predicting the LWD of the four species. The new models showed better accuracy than CDD model during validation. The model structure and parameters suggested that soil moisture likely influenced LWD nonlinearly and presented a multiplicative interaction with temperature and photoperiod. In addition, photoperiod had divergent effects on the accumulation of cold temperature for different species and sites. For X. sibiricum, the photoperiod only determined the start of cold temperature accumulation. Considering the carryover effect of spring phenology did not improve model performance. Our study also showed that local adaptation of plants was commonly ignored when using same parameters in model calibration with observation data from multiple sites; however, model calibrations using site‐specific data were less stable, and the parameters could not be extrapolated across space. It will be necessary to establish a generalized regional model driven by both climatic and genotypic factors in future research.

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Slowdown of spring green-up advancements in boreal forests

Cited by 45 publications

References 57 publications

Accelerated rate of vegetation green‐up related to warming at northern high latitudes

Accelerated rate of vegetation green‐up related to warming at northern high latitudes

Relative Contribution of Growing Season Length and Amplitude to Long-Term Trend and Interannual Variability of Vegetation Productivity over Northeast China

The important role of soil moisture in controlling autumn phenology of herbaceous plants in the Inner Mongolian steppe

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