Deforestation in the Brazilian Amazon surged during the month of April, ending a streak of three consecutive months where forest clearing had been lower than the prior year. The rise in deforestation came despite a high-profile pledge from Brazilian President Jair Bolsonaro to rein in deforestation in Earth’s largest rainforest.

According to preliminary deforestation alert data released Friday by Brazil’s national space research institute INPE, deforestation in the Brazilian portion of the Amazon amounted to 581 square kilometres in April, a 43% increase over April 2020 and the highest April tally since 2018.

However, by INPE’s count, deforestation is still pacing behind last year’s rate: When measured since the start of the “deforestation year” — which begins August 1 — 4,640 square kilometres of rainforest has been lost, a decline of 15% for the nine-month period.

But the trend reported by INPE is not matched by data from Imazon, a Brazilian organisation that independently monitors deforestation. Imazon’s data shows eight straight months of rising deforestation: Through the end of March, Imazon puts forest loss as 33% above last year’s level.

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amazon deforestation april

The discrepancies between the systems can generally be chalked up to the different methodologies they use. And both systems generate “preliminary data” which is used primarily for tracking where deforestation is occurring on a near-real-time basis, rather than comprehensively documenting forest loss.

The annual assessment, which uses higher resolution imagery and measures loss between August 1 and July 31, is considered the official baseline. Using that approach, deforestation for the 2019-2020 year amounted to 11,088 square kilometres, the highest on record since 2008.

Deforestation has accelerated sharply since Bolsonaro took office January 1, 2019. Based on deforestation alert data, forest clearing during his administration to date is about 98% higher than the same period of time under his predecessor, and 206% higher than Dilma Rousseff’s first 16 months in office.

This article was originally published on Mongabay, written by Mongabay.com, and is republished here as part of an editorial partnership with Earth.Org.