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Competition between biogeochemical drivers and land-cover changes determines urban greening or browning
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Li, Long (Nanjing University. International Institute for Earth System Science) ;
Zhan, Wenfeng (Nanjing University. International Institute for Earth System Science) ;
Ju, Weimin (Nanjing University. International Institute for Earth System Science) ;
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Zhu, Zaichun (Peking University. Peking University Shenzhen Graduate School) ;
Peng, Shushi (Peking University. Sino-French Institute for Earth System Science) ;
Zhu, Xiaolin (The Hong Kong Polytechnic University. Department of Land Surveying and Geo-Informatics) ;
Liu, Zihan (Nanjing University. International Institute for Earth System Science) ;
Zhou, Yuyu (Iowa State University. Department of Geological and Atmospheric Sciences) ;
Li, Jiufeng (Nanjing University. International Institute for Earth System Science) ;
Lai, Jiameng (Nanjing University. International Institute for Earth System Science) ;
Huang, Fan (Nanjing University. International Institute for Earth System Science) ;
Yin, Gaofei (Southwest Jiaotong University) ;
Fu, Yongshuo (Beijing Normal University) ;
Li, Manchun (Nanjing University) ;
Yu, Chao (Chinese Academy of Sciences. The Aerospace Information Research Institute)
Urban vegetation, a harbinger of future global vegetation change, is controlled by complex urban environments. The urban-rural gradient in vegetation greenness trends and their responses to biogeochemical drivers (e. [...]
2023 -  10.1016/j.rse.2023.113481
Remote sensing of environment, Vol. 287 (March 2023) , art. 113481
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12 p, 5.9 MB |
Radiation-constrained boundaries cause nonuniform responses of the carbon uptake phenology to climatic warming in the Northern Hemisphere
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Descals, Adrià (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Verger, Aleixandre (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Yin, Gaofei (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Filella, Iolanda (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Fu, Yongshuo H. (Beijing Normal University) ;
Piao, Shilong (Peking University) ;
Janssens, Ivan (University of Antwerp) ;
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Climatic warming has lengthened the photosynthetically active season in recent decades, thus affecting the functioning and biogeochemistry of ecosystems, the global carbon cycle and climate. Temperature response of carbon uptake phenology varies spatially and temporally, even within species, and daily total intensity of radiation may play a role. [...]
2023 - 10.1111/gcb.16502
Global change biology, Vol. 29, Issue 3 (February 2023) , p. 719-730
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Local interpretation of machine learning models in remote sensing with SHAP : the case of global climate constraints on photosynthesis phenology
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Descals, Adrià (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Verger, Aleixandre (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Yin, Gaofei (Southwest Jiaotong University. Faculty of Geosciences and Environmental Engineering) ;
Filella, Iolanda (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Data-driven models using machine learning have been widely used in remote-sensing applications such as the retrieval of biophysical variables and land cover classification. However, these models behave as a 'black box', meaning that the relationships between the input and predicted variables are hard to interpret. [...]
2023 - 10.1080/01431161.2023.2217982
International Journal of Remote Sensing, Vol. 44, issue 10 (2023) , p. 3160-3173
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8 p, 931.0 KB |
Aspect Matters : Unraveling Microclimate Impacts on Mountain Greenness and Greening
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Yin, Gaofei (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Xie, Jiangliu (Southwest Jiaotong University) ;
Ma, Dujuan (Southwest Jiaotong University) ;
Xie, Qiaoyun (The University of Western Australia) ;
Verger, Aleixandre (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Descals, Adrià (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Filella, Iolanda (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Mountains are vital ecosystems, yet predicting plant growth there is complex due to diverse microclimates on slopes. Equatorial-facing slopes (EFSs) are drier and warmer, and polar-facing slopes (PFSs) are wetter and colder, than their regional macroclimates. [...]
2023 - 10.1029/2023GL105879
Geophysical Research Letters, Vol. 50, Issue 24 (December 2023) , art. e2023GL105879
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18 p, 2.3 MB |
Validation of Sentinel-2, MODIS, CGLS, SAF, GLASS and C3S leaf area index products in maize crops
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Yu, Huinan (Southwest Jiaotong University. Faculty of Geosciences and Environmental Engineering) ;
Yin, Gaofei (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Liu, Guoxiang (Southwest Jiaotong University. Faculty of Geosciences and Environmental Engineering) ;
Ye, Yuanxin (Southwest Jiaotong University. Faculty of Geosciences and Environmental Engineering) ;
Qu, Yonghua (Chinese Academy of Sciences. Institute of Remote Sensing and Digital Earth) ;
Xu, Baodong (Huazhong Agricultural University. Macro Agriculture Research Institute) ;
Verger, Aleixandre (Centre de Recerca Ecològica i d'Aplicacions Forestals)
We proposed a direct approach to validate hectometric and kilometric resolution leaf area index (LAI) products that involved the scaling up of field-measured LAI via the validation and recalibration of the decametric Sentinel-2 LAI product. [...]
2021 - 10.3390/rs13224529
Remote sensing (Basel), Vol. 13, issue 22 (Nov. 2021) , art 4529
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9 p, 4.0 MB |
Evaluation and normalization of topographic effects on vegetation indices
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Chen, Rui (Southwest Jiaotong University) ;
Yin, Gaofei (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Liu, Guoxiang (Southwest Jiaotong University) ;
Li, Jing (Chinese Academy of Sciences. Institute of Remote Sensing and Digital Earth) ;
Verger, Aleixandre (Centre de Recerca Ecològica i d'Aplicacions Forestals)
The normalization of topographic effects on vegetation indices (VIs) is a prerequisite for their proper use in mountainous areas. We assessed the topographic effects on the normalized difference vegetation index (NDVI), the enhanced vegetation index (EVI), the soil adjusted vegetation index (SAVI), and the near-infrared reflectance of terrestrial vegetation (NIRv) calculated from Sentinel-2. [...]
2020 - 10.3390/rs12142290
Remote sensing (Basel), Vol. 12, Issue 14 (July 2020) , art. 2290
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10 p, 1.2 MB |
A broadband green-red vegetation index for monitoring gross primary production phenology
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Yin, Gaofei (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Verger, Aleixandre (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Descals, Adrià (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Filella, Iolanda (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
The chlorophyll/carotenoid index (CCI) is increasingly used for remotely tracking the phenology of photosynthesis. However, CCI is restricted to few satellites incorporating the 531nm band. This study reveals that the Moderate Resolution Imaging Spectroradiometer (MODIS) broadband green reflectance (band 4) is significantly correlated with this xanthophyll-sensitive narrowband (band 11) (R2 = 0:98, p < 0:001), and consequently, the broadband green-red vegetation index GRVI-computed with MODIS band 1 and band 4-is significantly correlated with CCI-computed with MODIS band 1 and band 11 (R2 = 0:97, p < 0:001). [...]
2022 - 10.34133/2022/9764982
Journal of Remote Sensing, Vol. 2022 (March 2022) , art. 9764982
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13 p, 8.2 MB |
Improved estimates of arctic land surface phenology using Sentinel-2 time series
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Descals, Adrià (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Yin, Gaofei (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Verger, Aleixandre (Centre de Recerca Ecològica i d'Aplicacions Forestals)
The high spatial resolution and revisit time of Sentinel-2A/B tandem satellites allow a potentially improved retrieval of land surface phenology (LSP). The biome and regional characteristics, however, greatly constrain the design of the LSP algorithms. [...]
2020 - 10.3390/rs12223738
Remote sensing (Basel), Vol. 12, Issue 22 (November 2020) , art. 3738
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14 p, 911.1 KB |
Divergent estimates of forest photosynthetic phenology using structural and physiological vegetation indices
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Yin, Gaofei (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Verger, Aleixandre (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Filella, Iolanda (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Descals, Adrià (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
The accurate estimation of photosynthetic phenology using vegetation indices (VIs) is important for measuring the interannual variation of atmospheric CO2 concentrations, but the relative performances of structural and physiological VIs remain unclear. [...]
2020 - 10.1029/2020GL089167
Geophysical Research Letters, Vol. 47, issue 18 (Sep. 2020) , e2020GL0891672020
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