Science Visualized Ecosystems

Online map tracks forest shifts from space

FOREST MAP  A new tool layers satellite images onto a Google map to show changes in forest cover.

M. Hansen et al/Science 2013

By Meghan Rosen

By layering more than 650,000 satellite images onto a Google map, researchers have created a new tool to track forest cover.

The online tool, described in the Nov. 15 Science, lets users walk through space and time, zooming from single plots to a global view. The big picture isn’t so pretty.

From 2000 to 2012, logging, fires, storms and other disturbances wiped out 2.3 million square kilometers of forest (red). Still, the maps reveal some bright spots: Brazil has cut back on clearing rainforests. And worldwide, 800,000 square kilometers of new forest have sprung up (blue) in the U.S. Southeast, Russia and elsewhere. Green marks areas unchanged over the period; purple marks areas with both losses and gains. 






BALTIC CYCLONE In 2011, a cyclone ripped through Finland’s forests. As the storm hurtled across the Russian border, winds gouged a gash in the forest more than 160 kilometers long (red). Satellite images reveal the cyclone’s path as well as differing logging practices in the countries. In Finland, small-scale logging leaves the land evenly speckled with trees (upper left). In Russia, increased logging has not yet reached the border region, which remains cloaked in green (lower right). M. Hansen et al/Science 2013
  
SUMATRA RAINFOREST After decades of clear-cutting and burning upland tropical rainforests, loggers and developers in Sumatra have started clearing lowland areas too. The map above highlights the advance of forest destruction into one area of the island’s east coast. A color gradient tracks forest losses by year, from yellow in 2000 to red in 2012. May of these forests are peatland swamps that could release vast stores of carbon after being cleared. M. Hansen et al/Science 2013

A version of this article appears in the December 14, 2013 issue of Science News.

About Meghan Rosen

Meghan Rosen is a staff writer who reports on the life sciences for Science News. She earned a Ph.D. in biochemistry and molecular biology with an emphasis in biotechnology from the University of California, Davis, and later graduated from the science communication program at UC Santa Cruz.

More Stories from Science News on Ecosystems

  1. Environment

    Landscape Explorer shows how much the American West has changed

    By Brianna Randall
  2. Animals

    This bird hasn’t been seen in 38 years. Its song may help track it down

    By Meghie Rodrigues
  3. Animals

    One mountain in Brazil is home to a surprising number of these parasitic wasps

    By Darren Incorvaia
  4. Plants

    On some Australian islands, sea level rise may be helping mangroves thrive

    By Darren Incorvaia
  5. Animals

    Fake fog, ‘re-skinning’ and ‘sea-weeding’ could help coral reefs survive

    By Darren Incorvaia
  6. Animals

    At the foot of a melting glacier in Peru, llamas helped revitalize the land

    By Saima S. Iqbal
  7. Life

    See the wonders of two newfound deep-sea coral reefs off the Galápagos

    By Erin Garcia de Jesús
  8. Life

    10 billion snow crabs have disappeared off the Alaskan coast. Here’s why

    By Jude Coleman

From the Nature Index

Paid Content