Publication Abstracts

Jiang et al. 2022

Jiang, Y., M. Yang, W. Liu, K. Mohammadi, and G. Wang, 2022: Eco-hydrological responses to recent droughts in tropical South America. Environ. Res. Lett., 17, no. 2, 024037, doi:10.1088/1748-9326/ac507a.

This study assesses the ecohydrological effects of recent meteorological droughts in tropical South America based on multiple sources of data, and investigates the possible mechanisms underlying the drought response and recovery of different ecohydrological systems. Soil drought response and recovery lag behind the meteorological drought, with delays longer in the dry region (Nordeste) than in the wet region (Amazonia), and longer in deep soil than in shallow soil. Evapotranspiration (ET) and vegetation in Nordeste are limited by water under normal conditions and decrease promptly in response to the onset of shallow soil drought. In most of the Amazon where water is normally abundant, ET and vegetation indices follow an increase-then-decrease pattern, increase at the drought onset due to increased sunshine and decrease when the drought is severe enough to cause a shift from an energy-limited regime to a water-limited regime. After the demise of meteorological droughts, ET and vegetation rapidly recover in Nordeste with the replenishment of shallow soil moisture (SM), but take longer to recover in southern Amazon due to their dependence on deep SM storage. Following severe droughts, the negative anomalies of ET and vegetation indices in southern Amazon tend to persist well beyond the end of soil drought, indicating drought-induced forest mortality that is slow to recover from. Findings from this study may have implications on the possibility of a future forest dieback as drought is projected to become more frequent and more severe in a warmer climate.

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BibTeX Citation

  author={Jiang, Y. and Yang, M. and Liu, W. and Mohammadi, K. and Wang, G.},
  title={Eco-hydrological responses to recent droughts in tropical South America},
  journal={Environ. Res. Lett.},

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RIS Citation

ID  - ji07300l
AU  - Jiang, Y.
AU  - Yang, M.
AU  - Liu, W.
AU  - Mohammadi, K.
AU  - Wang, G.
PY  - 2022
TI  - Eco-hydrological responses to recent droughts in tropical South America
JA  - Environ. Res. Lett.
VL  - 17
IS  - 2
SP  - 024037
DO  - 10.1088/1748-9326/ac507a
ER  -

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