Mapping the world for climate sensitivity

The international team of researchers has used this method to map which areas are most sensitive to climate variability across the world.

“Based on the satellite data gathered, we can identify areas that, over the past 14 years, have shown high sensitivity to climate variability,” says researcher Alistair Seddon at the Department of Biology at the University of Bergen (UiB).

Their work was recently published in Nature.

Climate sensitivity aroung the world

The researchers have identified climate drivers of vegetation productivity on monthly timescales. They have found climate sensitivity in ecosystems around the globe.

“We have found ecologically sensitive regions with amplified responses to climate variability in the Arctic tundra, parts of the boreal forest belt, the tropical rainforest, alpine regions worldwide, steppe and prairie regions of central Asia and North and South America, forests in South America, and eastern areas of Australia,” says Seddon.

Creating a sensitivity index

The metric they have developed, the Vegetation Sensitivity Index (VSI), allows a more quantifiable response to climate change challenges and how sensitive different ecosystems are to short-term climate anomalies; for example a warmer June than on average, a cold December, a cloudy September, etc. The index supplements previous methods for monitoring and evaluating the condition of ecosystems.

“Our study provides a quantitative methodology for assessing the relative response rate of ecosystems – either natural ones or those with a strong anthropogenic footprint, to climate variability,” Seddon explains.

Satellite data

The researchers used satellite data from 2000 to 2013.

“First of all, the method identifies which climate related variables – such as temperature, water availability, and cloudiness – are important for controlling productivity in a given location,” says Seddon.

“Then we compare the variability in ecosystem productivity, which we also obtain from satellite data, against the variability in the important climate variables.”

VSI provides an additional vegetation metric that can be used to assess the status of ecosystems globally scale.

“This kind of information can be really useful for national-scale ecosystem assessments, like Nordic Nature,” Seddon states. “Even more interesting is that as satellite measurements continue and so as the datasets get longer, we will be able to recalculate our metric over longer time periods to investigate how and if ecosystem sensitivity to climate variability is changing over time.”

Scientific links

• Seddon et al. (2016): Sensitivity of global terrestrial ecosystems to climate variability. doi:10.1038/nature16986

External links

• Alistair Seddon's profile

Related content

What does the average Norwegian think about climate-related issues?

Using a new method, researchers discovered that so-called climate sceptics are more ambivalent about climate issues than previously assumed.

1.4 billion years old forces are causing climate change today

Scientists have found evidence that the same natural forces that are causing climate changes today made the climate turbulent 1.4 billion years ago.

Changing climate can change building standards

Roofs in Norway have to be built to hold up under heavy loads of snow. But a warmer climate and less snow might mean a change in building standards for roofs that have to be built to last a century.

Climate and intensive farming push European birds into decline

Bird populations in Europe both benefit and suffer from warmer temperatures, while many populations are in decline due to threats posed by intensive agriculture.