CarbonTracker is a tool for modelling sources and sinks of carbon dioxide. Users can download the code, carbon dioxide data, and the tool's carbon flux estimates to conduct their own analyses or to help improve the system.

Climate change is a global phenomenon, affecting weather events around the world.

After some very cold weather this month, folks are likely wondering if the early chill is a harbinger of things to come this winter. "Not necessarily," explains Mike Halpert of NOAA's Climate Prediction Center in this week's ENSO blog post.

CFSv2 ensemble forecast Nino3.4 sea-surface temperature

The chance of an El Nino has dropped to about 65%. What led to this change in the forecast?

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