African rainforest moisture contribution to continental agricultural water consumption

Nyasulu, Maganizo Kruger; Fetzer, Ingo; Wang-Erlandsson, Lan; Stenzel, Fabian; Gerten, Dieter; Rockström, Johan; Falkenmark, Malin

doi:10.1016/j.agrformet.2023.109867

Cited by 7 publications

(2 citation statements)

References 72 publications

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“…The variation in seasonal rainfall significantly impacts forest net primary productivity, plant species' growth cycles, and overall ecosystem stability [2]. Moreover, the abundant precipitation in tropical forests profoundly affects ecological processes such as plant community structure, biodiversity, and forest productivity [3], and can even provide water resources for many surrounding agricultural areas [4]. An unprecedented drought swept through the Amazon rainforest in 2005.…”

Section: Introductionmentioning

confidence: 99%

Climate Seasonality of Tropical Evergreen Forest Region

Luo,

Sun,

Tan

2024

Water

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Climatic seasonality has lacked research attention in terms of global tropical forests, where it impacts vegetation productivity, biodiversity, and hydrological cycles. This study employs two methods—climatological anomalous accumulation (CAA) and potential evapotranspiration (PET) threshold—to detect the climatic seasonality of global tropical forests, including the onset and duration of wet seasons. Spatial clustering based on the length of the wet season is used to delineate smaller regions within the tropical forest areas to observe their precipitation patterns. The results show that these methods effectively reveal more homogeneous regions and their respective rainfall patterns. In particular, we found that the wet season in Amazon forests detected by the CAA method is more uniform in space than the PET threshold, but the global tropical forest regions divided by the CAA method on average contain more complex climates than the PET threshold. Moreover, the year-round abundant precipitation in Southeast Asia, which is strongly influenced by monsoons, presents challenges for wet season detection. Overall, this work provides an objective perspective for understanding the climatic seasonality changes in tropical forests and lays a scientific foundation for future forest management and the development of adaptation strategies to global climate change.

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Section: Introductionmentioning

confidence: 99%

Climate Seasonality of Tropical Evergreen Forest Region

Luo,

Sun,

Tan

2024

Water

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“…Among the social implications are variations in local and remote water provision; among the ecological implications are those on forest and biodiversity intactness. Some regions that are highly dependent on rainfed agriculture, such as Sub-Saharan Africa, might be heavily impacted by changes in terrestrial moisture recycling (Nyasulu et al, 2024). However, even though changes in terrestrial precipitation recycling seem to be strongly impacted by global warming, we can use insights on the changing moisture recycling patterns to influence 480 precipitation levels where they are most needed.…”

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Global terrestrial moisture recycling in Shared Socioeconomic Pathways

Staal,

Meijer,

Nyasulu

et al. 2024

Preprint

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Abstract. Many areas across the globe rely on upwind land areas for their precipitation supply through terrestrial precipitation recycling. Global warming and land-use changes may affect the future patterns of terrestrial precipitation recycling, but where and to which extent remains unclear. To study how the global patterns of precipitation recycling may change until the end of the 21st century we present a new forward-tracking version of the three-dimensional atmospheric moisture tracking model UTrack that is forced by output of the Norwegian Earth System model (NorESM2). We simulate global precipitation recycling in four Shared Socioeconomic Pathways (SSPs), which are internally consistent combinations of climate- and land-use scenarios used in the sixth phase of the Coupled Model Intercomparison Project. The scenarios range from mild to severe: SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5. We compare results for the middle of the century (2050–2059) and end of the century (2090–2099) with a 2015–2024 baseline. We similarly also calculate basin precipitation recycling for the 26 major river basins of the world. We find that the global terrestrial moisture recycling ratio decreases with the severity of the SSPs and estimate a decrease in this ratio of 2.1 % with every degree of global warming. However, we find differences among regions and river basins in trends in precipitation recycling and whether projected drying or wetting is mainly contributed by land or ocean. Our results give critical insight into the relative contributions of global warming and land use changes on global precipitation changes over the course of this century. In addition, our model paves the way for more detailed regional studies of future changes in terrestrial moisture recycling.

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Plant–Soil Interactions and Nutrient Cycling Dynamics in Tropical Rainforests

Zhao,

Riaz

2024

Environment, Climate, Plant and Vegetation Growth

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African rainforest moisture contribution to continental agricultural water consumption

Cited by 7 publications

References 72 publications

Climate Seasonality of Tropical Evergreen Forest Region

Climate Seasonality of Tropical Evergreen Forest Region

Global terrestrial moisture recycling in Shared Socioeconomic Pathways

Plant–Soil Interactions and Nutrient Cycling Dynamics in Tropical Rainforests

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