New Report Examines Bog Breathing to Monitor Peatland Restoration

A new report by NatureScot The University of Highlands and Islands Nottingham University and Forestry and Land Scotland examines #BogBreathing, using world leading satellite technology to monitor #peatland restoration sites in Scotland.

The report released on #BogDay used satellite technology to look at how these bogs breathe” and how it could help build a better picture of peatland conditions in Scotland.

The research uses Satellite Interferometric Synthetic Aperture Radar (InSAR), which can map the movement of the ground’s surface – a technique developed with University of Nottingham spinout company Terra Motion Ltd.

The key takeaways from the report include:

• Time series of peatland surface motion can be measured using InSAR
• Peatland surface motion is diagnostic of peatland condition
• Multi-annual velocity, peak timing, and amplitude, determined from the timeseries, can be used to produce automated peatland condition assessments
• The relative efficacy of different peatland restoration techniques can be quantified using InSAR measures of peatland surface motion.
• Areas with elevated risk of peatland instability can be detected using peatland surface motion.

By measuring the motion over time, the technique is able to assess the condition of the peatland and the effectiveness of different restoration techniques on a large-scale.

If developed on a national-scale, the method could provide a better estimate of the amount, distribution, condition and associated carbon inventories of peatlands in Scotland, and a means of assessing the impact of investment in peatland restoration.

It could also help to identify areas at high-risk of peat instability, fire and erosion, and highlight where urgent restoration action might be needed.

May Shirkhorshidi, NatureScot’s Peatland ACTION report manager, said: “Peatland restoration is a crucial nature-based solution to the twin crises of climate change and biodiversity loss, a key priority as we look towards the COP26 in Glasgow later this year.

“While in the early stages of development, we are excited about the long-term potential of this research, which could help Peatland ACTION to target priority areas for restoration and offer a scientifically-proven way of monitoring changes in peatland condition following restoration.

“This is a really interesting development for all the Peatland ACTION partners as it could help us evaluate the success of different restoration techniques – putting us in a better position to share this knowledge with others. Crucially it could allow us to do this more quickly and on a far larger scale across Scotland. We look forward to working with partners over the coming years to develop the concept further.”

Lead author Chris Marshall conducted the research while at Nottingham and subsequently with the Environmental Research Institute at North Highland College UHI, part of the University of the Highlands and Islands, where he is now a peatland scientist.

He said: “Bog breathing or peat surface motion gives a unique insight into the inner workings of the peatland including its landscape, hydrology and ecology, however the high frequency of ESA sentinel-1 imagery and developments in InSAR processing techniques allows us to monitor peatland condition at a scale unimaginable a decade ago allowing peatland restoration progress to be measured in real time.

“The techniques developed during this work are now being applied as part of a Leverhulme award to determine how resilient the Scotland’s peatlands are to extreme climate events such as wildfire, drought and extreme precipitation events, in order to guide management of these valuable ecosystems during this period of climatic change.” 

David Large, co-author and peatland specialist at the University of Nottingham, said: “This new tool allows us to see the landscape swell and contract in response to different environmental conditions. A healthy peatland is wet with lots of soft and spongy sphagnum mosses that swell and retain water. In contrast, drier peatlands are stiffer and unresponsive to the addition of water. The former moves like a beating heart, whereas a degraded peatland could be described as flatlining! 

“This technique is really exciting because it enhances our understanding of peatlands, allowing us to see what we would not ordinarily be able to with the naked eye, making our peatlands more accessible and ensuring restoration takes place in the right place. In the future, it has the potential to be used to monitor carbon emissions.”

You can read the full research report – Using peatland surface motion (bog breathing) to monitor Peatland Action sites.