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Ecosystem Effects of Boreal Forest Fires

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Maps of derived metrics aggregated to 1 degree for (a) crown scorch, (b) vegetation combustion, and (c) total relative tree mortality (from Rogers et al., 2015, Supplementary Figure 4).

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A new data set characterizes the immediate and longer-term ecosystem changes from fires in the boreal forests of Northern Eurasia and North America.

Vegetation on Arctic Pingos

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A typical pingo, Prudhoe Bay, Alaska. This feature is 7 m high and has a basal diameter of 110 m (from Walker, 1990).

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A pingo is a mound of earth-covered ice found in the Arctic. A new data set provides vegetation data on 41 pingos in the North Slope of Alaska.

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Tree mortality due to fires and bark beetles

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Cumulative tree mortality due to (a) fires and (b) bark beetles from 2003-2012 on forestland in the western United States (from Berner et al., 2017, in review).

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Wildfire and bark beetles caused tree mortality, and decreased carbon storage, in areas of the western USA from 2003-2012.

Is the snow melting earlier?

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Mean snowmelt Day of Year (DOY) for the years 2001-2015 for North America. The DOY values for snowmelt timing were identified by observing the transition from snow-cover to no-snow for individual MODIS pixels throughout the annual melt period.

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A new time-series analysis of snow cover has identified the day of snowmelt in each MODIS pixel across North America in each year from 2001 - 2015.

Methane emissions from wetlands

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Global monthly 0.5-deg by 0.5-deg wetland methane emissions from (a) the full ensemble (2009-2010) and (b) extended ensemble (2001-2015). From Bloom et al. (2017).

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NASA's Carbon Monitoring System releases data characterizing monthly global methane emissions and uncertainty from wetlands.

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