Vast areas of forest in Canada and Russia were lost to fire in
2013, according
to new satellite data. But there were encouraging signs from
Indonesia, where the loss of forest cover fell to the lowest level in a decade.
Scientists from Global Forest Watch collated 400,000 images of the Earth’s
surface to map
the world’s forests down
to a resolution of 30 metres. Their findings showed that overall the world lost
18m hectares of forest in 2013.
Between 2011 and 2013 fires in the
boreal forests of Canada and
Russia accounted for almost a quarter of global forest losses. Some of this
will return, but northern forests are particularly slow to recover after fire.
Boreal forests are one of the world’s
great carbon sinks. But scientists predict that climate change will
cause them to burn more often and with greater intensity, unlocking
the carbon stored in the wood and soil. Already they
are burning more than at any point in the past 10,000 years.
Dr Nigel Sizer, study co-author and director of the forests
programme for the World Resources Institute (WRI), said the
increase of fires in northern forests had worrying implications for the
climate. “If global warming is leading to more fires in boreal forests, which
in turn leads to more emissions from those forests, which in turn leads to more
climate change. This is one of those positive feedback loops that should be of
great concern to policy makers.”
Dimitry Aksenov, the director of Russian
NGO Transparent World said: “In Russia, according to official statistics and to
experts, the dominant amount of fires are caused by humans.” As many as 90-95%
of fires in Russia are ignited by human interventions, he said. “This is very
different to North America.”
Forestry and oil and gas exploration have driven roads through
previously inaccessible forests, increasing the risk of fires.
Olga Gershenzon, founder of Russian
commercial satellite imagery company ScanEx who contributed to the data, said
forest management and fire prevention in Russia and Canada was in need of
improvement.
“This should be a clear call to action
to look closely at forest management in Russia and Canada in the face of
climate change. The massive tree cover loss shows there is much to be improved
in terms of monitoring and understanding the causes and types of forest fires.”
Around 70% of the Russian and Canadian
losses could be attributed to fire. The researchers said logging and pests
could also account for the increased loss of northern forests.
Brazil, the US and Indonesia rounded out the
five largest contributors to tree-cover loss between 2011 and 2013. But in a
sign that recent efforts to tackle deforestation may be working, Indonesian
forest losses bucked their recent trend by falling to their lowest level in a
decade in 2013.
WRI scientists said it was too early to
know whether the destruction
of the country’s rainforest was
coming under control. Recent forest preservation efforts have been bolstered by
mercurial market effects, such as a drop in palm oil prices, which have almost
halved since 2012. Additionally, many of Indonesia’s accessible
forest have already been cleared.
Because of the massive loss of its forests and peatlands,
Indonesia has become
the world’s third largest emitter of carbon dioxide. The new government
of Joko Widodo has made
stemming deforestation a major commitment.
Indonesia’s minister of environment and
forests Siti Nurbaya said the news was positive but didn’t amount to a
turnaround. “It is too early to say this is a definitive trend, and the
ministry is now examining how our numbers compare with this finding. If it
holds true, this could be a powerful indicator that Indonesia’s significant
investments in forest protection are paying off. We intend to take additional
steps to ensure these positive trends continue.”
Agustin Teras Narang, the governor of
Central Kalimantan province in Borneo said his region had seen its forests protected
through cooperation between local communities, regional and national government
and the UN’s REDD+ programme, which offers financial
incentives for forest protection.
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