Moisture origins of the Amazon carbon source region
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Environmental Research Letters
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The southeastern Amazon has recently been shown to be a net carbon source, which is partly
caused by drying conditions. Drying depends on a number of factors, one of which is the land
cover at the locations where the moisture has originated as evaporation. Here we assess for the first
time the origins of the moisture that precipitates in the Amazon carbon source region, using
output from a Lagrangian atmospheric moisture tracking model. We relate vegetation productivity
in the Amazon carbon source region to precipitation patterns and derive land-cover data at the
moisture origins of these areas, allowing us to estimate how the carbon cycle and hydrological cycle
are linked in this critical part of the Amazon. We find that, annually, 13% of the precipitation in the
Amazon carbon source region has evaporated from that same area, which is half of its land-derived
moisture. We further find a moisture-recycling-mediated increase in gross primary productivity of
roughly 41 Mg carbon km−2 yr−1 within the Amazon carbon source region if it is fully forested
compared to any other land cover. Our results indicate that the parts of the Amazon forest that are
already a net carbon source, still help sustain their own biomass production. Although the most
degraded parts of the Amazon depend mostly on oceanic input of moisture, further degradation of
this region would amplify carbon losses to the atmosphere.
Como referenciar
STAAL, ARIE; KOREN, GERBRAND; TEJADA, GRACIELA; GATTI, LUCIANA V. Moisture origins of the Amazon carbon source region. Environmental Research Letters, v. 18, n. 4, p. 1-7, 2023. DOI: 10.1088/1748-9326/acc676. Disponível em: http://repositorio.ipen.br/handle/123456789/34102. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.