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Seasonal co-variation of plant water storage, canopy greenness, and groundwater storage across the globe

Tian, Feng LU ; Wigneron, Jean-Pierre ; Ciais, Philippe ; Chave, Jérome ; Ogee, Jerome ; Peñuelas, Josep ; Ræbild, Anders ; Domec, Jean-Christophe ; Tong, Xiaoye and Brandt, Martin , et al. (2018) AGU (American Geophysical Union) Fall Meeting, 2018
Abstract
Plant water storage is fundamental to the functioning of terrestrial ecosystems by participating in plant metabolism, nutrient and sugar transport, and maintenance of the integrity of the hydraulic system of the plant. However, a global view of the size and dynamics of the water pools stored in plant tissues is still lacking. Here, we report global patterns of seasonal variations in ecosystem-scale plant water storage and their relationship with leaf phenology and groundwater variability, based on space-borne measurements of L-band vegetation optical depth. We find that seasonal variations in plant water storage are highly synchronous with leaf phenology for the boreal and temperate forests, but asynchronous for the tropical woodlands,... (More)
Plant water storage is fundamental to the functioning of terrestrial ecosystems by participating in plant metabolism, nutrient and sugar transport, and maintenance of the integrity of the hydraulic system of the plant. However, a global view of the size and dynamics of the water pools stored in plant tissues is still lacking. Here, we report global patterns of seasonal variations in ecosystem-scale plant water storage and their relationship with leaf phenology and groundwater variability, based on space-borne measurements of L-band vegetation optical depth. We find that seasonal variations in plant water storage are highly synchronous with leaf phenology for the boreal and temperate forests, but asynchronous for the tropical woodlands, where the seasonal development of plant water storage lags behind leaf area by up to 180 days. Contrasting patterns of the time lag between plant water storage and terrestrial groundwater storage are also evident in these ecosystems. A comparison of the water cycle components in seasonally dry tropical woodlands highlights the buffering effect of plant water storage on the seasonal dynamics of water supply and demand. Our results offer insights into ecosystem-scale plant water relations globally and provide a basis for an improved parameterization of eco-hydrological and Earth system models. (Less)
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organization
publishing date
type
Contribution to conference
publication status
published
subject
pages
1 pages
conference name
AGU (American Geophysical Union) Fall Meeting, 2018
conference location
Washington, United States
conference dates
2018-12-10 - 2018-12-14
language
English
LU publication?
yes
additional info
abstract #B51I-2065
id
cfb1ddcb-3c60-4b8d-9fb3-0a97199a8b7a
alternative location
https://ui.adsabs.harvard.edu/abs/2018AGUFM.B51I2065T/abstract
date added to LUP
2019-05-27 09:48:33
date last changed
2020-09-22 02:22:38
@misc{cfb1ddcb-3c60-4b8d-9fb3-0a97199a8b7a,
  abstract     = {Plant water storage is fundamental to the functioning of terrestrial ecosystems by participating in plant metabolism, nutrient and sugar transport, and maintenance of the integrity of the hydraulic system of the plant. However, a global view of the size and dynamics of the water pools stored in plant tissues is still lacking. Here, we report global patterns of seasonal variations in ecosystem-scale plant water storage and their relationship with leaf phenology and groundwater variability, based on space-borne measurements of L-band vegetation optical depth. We find that seasonal variations in plant water storage are highly synchronous with leaf phenology for the boreal and temperate forests, but asynchronous for the tropical woodlands, where the seasonal development of plant water storage lags behind leaf area by up to 180 days. Contrasting patterns of the time lag between plant water storage and terrestrial groundwater storage are also evident in these ecosystems. A comparison of the water cycle components in seasonally dry tropical woodlands highlights the buffering effect of plant water storage on the seasonal dynamics of water supply and demand. Our results offer insights into ecosystem-scale plant water relations globally and provide a basis for an improved parameterization of eco-hydrological and Earth system models.},
  author       = {Tian, Feng and Wigneron, Jean-Pierre and Ciais, Philippe and Chave, Jérome and Ogee, Jerome and Peñuelas, Josep and Ræbild, Anders and Domec, Jean-Christophe and Tong, Xiaoye and Brandt, Martin and Mialon, Arnaud and Rodriguez-Fernandez, Nemesio and Tagesson, Torbern and Al-Yaari, Amen and Kerr, Y. H. and Myneni, R. and Zhang, Wenmin and Ardö, Jonas and Fensholt, R.},
  language     = {eng},
  title        = {Seasonal co-variation of plant water storage, canopy greenness, and groundwater storage across the globe},
  url          = {https://ui.adsabs.harvard.edu/abs/2018AGUFM.B51I2065T/abstract},
  year         = {2018},
}