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

Author:
  • Feng Tian
  • Jean-Pierre Wigneron
  • Philippe Ciais
  • Jérome Chave
  • Jerome Ogee
  • Josep Peñuelas
  • Anders Ræbild
  • Jean-Christophe Domec
  • Xiaoye Tong
  • Martin Brandt
  • Arnaud Mialon
  • Nemesio Rodriguez-Fernandez
  • Torbern Tagesson
  • Amen Al-Yaari
  • Y. H. Kerr
  • R. Myneni
  • Wenmin Zhang
  • Jonas Ardö
  • R. Fensholt
Publishing year: 2018
Language: English
Pages:
Document type: Conference paper: abstract
Additional info: Abstract #B51I-2065

Abstract english

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.

Keywords

  • Physical Geography
  • Oceanography, Hydrology, Water Resources
  • Ecology

Other

AGU (American Geophysical Union) Fall Meeting, 2018
2018-12-10 - 2018-12-14
Washington, United States
Published
E-mail: jonas [dot] ardo [at] nateko [dot] lu [dot] se

Professor

Dept of Physical Geography and Ecosystem Science

+46 46 222 40 31

369

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Teaching staff

Dept of Physical Geography and Ecosystem Science

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Department of Physical Geography and Ecosystem Science
Lund University
Sölvegatan 12
S-223 62 Lund
Sweden

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