Changes in the surface and atmospheric water budget due to projected Amazon deforestation: Lessons from a fully coupled model simulation

Wongchuig, Sly; Espinoza, Jhan Carlo; Condom, Thomas; Junquas, Clémentine; Sierra, Juan Pablo; Fita, L.; Sörensson, Anna A.; Polcher‬, Jan

doi:10.1016/j.jhydrol.2023.130082

Cited by 8 publications

(3 citation statements)

References 97 publications

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“…These events are taking place at a time when the Amazon rainforest is moving towards a "tipping point", especially those regions undergoing intense forest degradation and deforestation, characterized by a warming trend 3,4 , a lengthening of the dry season 5,7 and a decline of the Amazon carbon sink 1,8 . Both, climate change and Amazon deforestation, are considered as main drivers of this biophysical transition in Amazonia [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] .…”

Section: Conclusion and Final Commentsmentioning

confidence: 99%

“…High deforestation rates regionally affect the hydrological cycle in the Amazon basin [41][42][43] . Deforestation reduces the latent heat (evapotranspiration) and increases the sensible heat, contributing to the heating of the lower atmosphere and reducing the amount of water vapor in the atmosphere [33][34][35][36] . In addition, the hot and www.nature.com/scientificreports/ dry conditions favor the occurrence of anthropogenic large-scale fires 7,44 .…”

Section: Conclusion and Final Commentsmentioning

confidence: 99%

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The new record of drought and warmth in the Amazon in 2023 related to regional and global climatic features

Espinoza,

Jimenez,

Marengo

et al. 2024

Sci Rep

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In 2023 Amazonia experienced both historical drought and warm conditions. On October 26th 2023 the water levels at the port of Manaus reached its lowest record since 1902 (12.70 m). In this region, October monthly maximum and minimum temperature anomalies also surpassed previous record values registered in 2015 (+ 3 °C above the normal considering the 1981–2020 average). Here we show that this historical dry and warm situation in Amazonia is associated with two main atmospheric mechanisms: (i) the November 2022–February 2023 southern anomaly of vertical integrated moisture flux (VIMF), related to VIMF divergence and extreme rainfall deficit over southwestern Amazonia, and (ii) the June–August 2023 downward motion over northern Amazonia related to extreme rainfall deficit and warm conditions over this region. Anomalies of both atmospheric mechanisms reached record values during this event. The first mechanism is significantly correlated to negative sea surface temperature (SST) anomalies in the equatorial Pacific (November–February La Niña events). The second mechanism is significantly correlated to positive SST anomalies in the equatorial Pacific, related to the impacts of June–September El Niño on the Walker Circulation. While previous extreme droughts were linked to El Niño (warmer North Tropical Atlantic SST) during the austral summer (winter and spring), the transition from La Niña 2022–23 to El Niño 2023 appears to be a key climatic driver in this record-breaking dry and warm situation, combined to a widespread anomalous warming over the worldwide ocean.

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Section: Conclusion and Final Commentsmentioning

confidence: 99%

Section: Conclusion and Final Commentsmentioning

confidence: 99%

The new record of drought and warmth in the Amazon in 2023 related to regional and global climatic features

Espinoza,

Jimenez,

Marengo

et al. 2024

Sci Rep

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“…Over the past few decades, the five northwestern provinces and regions have achieved significant development in industry, agriculture, and urbanization [3]. However, this development often comes at the cost of sacrificing the environment and ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Evaluation and Coupled Coordinated Development Study of Water–Economic–Ecological Systems in the Five Northwestern Provinces of China

Shi,

Yang,

Wang

et al. 2023

Water

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The five northwestern provinces face numerous challenges in sustainable development, particularly water scarcity, economic imbalances, and ecological degradation. This study aims to deeply assess the region’s water resource conditions, the current status of economic development, and the health of the ecosystem while exploring the relationships and coupling mechanisms among them. Using the obstacle model, the research analyzes the primary barriers affecting these three significant factors in the region. The study further reveals a continually improving trend of coordinated development within the water–economic–ecological system in the five northwestern provinces of China, indicating that water usage per ten thousand GDP is the primary obstacle. This research enriches our understanding of the development in China’s five northwestern provinces and provides a theoretical foundation for achieving sustainable development.

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Seasonal types in homogeneous rainfall regions of the Amazon basin

Michot,

Corpetti,

Ronchail

et al. 2024

Intl Journal of Climatology

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Due to its size and geographical features, different average annual rainfall regimes co‐exist in the Amazon basin, with distinct year‐to‐year variability dependent on regions within the basin. In this study, we define and explain the seasonal regional types of annual regimes, that is, years with similar seasonal anomalies. Our work is based on a 205 rain gauge network distributed over five Amazonian countries, spanning a period over 30 years. Using a spectral clustering method, we identified seven sub‐regions within the basin in which annual rainfall regimes are spatially homogenous. For each sub‐domain, we estimated specific parameters that characterize the rainy season (onset and demise dates, sign and duration of rainfall anomalies). Finally, using spectral analysis we identified between two and four ‘seasonal type’ of precipitation in these seven sub‐domains. Most of these seasonal types are in phase with the large‐scale atmospheric circulation, which explains the temporal link with rainfall anomalies. The seasonal types result of the superposition of inter‐annual and intra‐seasonal variability whose factors are then difficult to identify and attribute. Part of the rainfall anomalies characterizing seasonal types is related to the inter‐annual variability of the sea surface temperature in the Atlantic or the Pacific oceans, especially in the northeast and southeast part of the Amazon basin, whereas in other parts, strong intra‐seasonal and local factors have a larger impact. The same sign and duration of anomalies do not concomitantly affect the various regions of the Amazon basin, confirming that one mode of variability does not homogeneously affect precipitation in different parts of the basin.

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Changes in the surface and atmospheric water budget due to projected Amazon deforestation: Lessons from a fully coupled model simulation

Cited by 8 publications

References 97 publications

The new record of drought and warmth in the Amazon in 2023 related to regional and global climatic features

The new record of drought and warmth in the Amazon in 2023 related to regional and global climatic features

Comprehensive Evaluation and Coupled Coordinated Development Study of Water–Economic–Ecological Systems in the Five Northwestern Provinces of China

Seasonal types in homogeneous rainfall regions of the Amazon basin

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