---
OA_place: publisher
OA_type: free access
_id: '22440'
abstract:
- lang: eng
  text: Large uncertainties on the sensitivity of Amazon forests to drought exist.
    Even though water stress should suppress photosynthesis and enhance tree mortality,
    a green‐up has been often observed during the dry season. This interplay between
    climatic forcing and forest phenology is poorly understood and inadequately represented
    in most of existing dynamic global vegetation models calling for an improved description
    of the Amazon seasonal dynamics. Recent findings on tropical leaf phenology are
    incorporated in the state‐of‐the‐art eco‐hydrological model Thetys & Chloris.
    The new model accounts for a mechanistic light‐controlled leaf development, synchronized
    dry‐season litterfall, and an age‐dependent leaf photosynthetic capacity. Simulation
    results from 32 sites in the Amazon basin over a 15‐year period successfully mimic
    the seasonality of gross primary productivity; evapotranspiration (ET); as well
    as leaf area index, leaf age, and leaf productivity. Representation of tropical
    leaf phenology reproduces the observed dry‐season greening, reduces simulated
    gross primary productivity, and does not alter ET, when compared with simulations
    without phenology. Tolerance to dry periods, with the exception of major drought
    events, is simulated by the model. Deep roots rather than leaf area index regulation
    mechanisms control the response to short‐term droughts, but legacy effects can
    exacerbate multiyear water stress. Our results provide a novel mechanistic approach
    to model leaf phenology and flux seasonality in the tropics, reconciling the generally
    observed dry‐season greening, ET seasonality, and decreased carbon uptake during
    severe droughts.
article_processing_charge: No
article_type: original
author:
- first_name: Gabriele
  full_name: Manoli, Gabriele
  last_name: Manoli
- first_name: Valeriy Y.
  full_name: Ivanov, Valeriy Y.
  last_name: Ivanov
- first_name: Simone
  full_name: Fatichi, Simone
  id: cf8e546b-a9b0-11f0-a43b-aa89ed1b56d6
  last_name: Fatichi
citation:
  ama: 'Manoli G, Ivanov VY, Fatichi S. Dry‐season greening and water stress in Amazonia:
    The role of modeling leaf phenology. <i>Journal of Geophysical Research: Biogeosciences</i>.
    2018;123(6):1909-1926. doi:<a href="https://doi.org/10.1029/2017jg004282">10.1029/2017jg004282</a>'
  apa: 'Manoli, G., Ivanov, V. Y., &#38; Fatichi, S. (2018). Dry‐season greening and
    water stress in Amazonia: The role of modeling leaf phenology. <i>Journal of Geophysical
    Research: Biogeosciences</i>. American Geophysical Union. <a href="https://doi.org/10.1029/2017jg004282">https://doi.org/10.1029/2017jg004282</a>'
  chicago: 'Manoli, Gabriele, Valeriy Y. Ivanov, and Simone Fatichi. “Dry‐season Greening
    and Water Stress in Amazonia: The Role of Modeling Leaf Phenology.” <i>Journal
    of Geophysical Research: Biogeosciences</i>. American Geophysical Union, 2018.
    <a href="https://doi.org/10.1029/2017jg004282">https://doi.org/10.1029/2017jg004282</a>.'
  ieee: 'G. Manoli, V. Y. Ivanov, and S. Fatichi, “Dry‐season greening and water stress
    in Amazonia: The role of modeling leaf phenology,” <i>Journal of Geophysical Research:
    Biogeosciences</i>, vol. 123, no. 6. American Geophysical Union, pp. 1909–1926,
    2018.'
  ista: 'Manoli G, Ivanov VY, Fatichi S. 2018. Dry‐season greening and water stress
    in Amazonia: The role of modeling leaf phenology. Journal of Geophysical Research:
    Biogeosciences. 123(6), 1909–1926.'
  mla: 'Manoli, Gabriele, et al. “Dry‐season Greening and Water Stress in Amazonia:
    The Role of Modeling Leaf Phenology.” <i>Journal of Geophysical Research: Biogeosciences</i>,
    vol. 123, no. 6, American Geophysical Union, 2018, pp. 1909–26, doi:<a href="https://doi.org/10.1029/2017jg004282">10.1029/2017jg004282</a>.'
  short: 'G. Manoli, V.Y. Ivanov, S. Fatichi, Journal of Geophysical Research: Biogeosciences
    123 (2018) 1909–1926.'
das_tickbox: '1'
date_created: 2026-07-27T12:30:23Z
date_published: 2018-06-01T00:00:00Z
date_updated: 2026-07-30T06:04:25Z
day: '01'
doi: 10.1029/2017jg004282
extern: '1'
fulldoi: https://doi.org/10.1029/2017jg004282
intvolume: '       123'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1029/2017JG004282
month: '06'
oa: 1
oa_version: Published Version
page: 1909-1926
publication: 'Journal of Geophysical Research: Biogeosciences'
publication_identifier:
  eissn:
  - 2169-8961
  issn:
  - 2169-8953
publication_status: published
publisher: American Geophysical Union
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Dry‐season greening and water stress in Amazonia: The role of modeling leaf
  phenology'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 123
year: '2018'
...