A constellation of satellites will be flown this decade to try to pinpoint significant releases of climate-changing gases, in particular carbon dioxide and methane. The initiative is being led by an American non-profit organisation called Carbon Mapper.
It will use technology developed by the US space agency over the past decade.
The satellites – 20 or so – will be built and flown by San Francisco’s Planet company.
Planet operates today the largest fleet of Earth-observing spacecraft.
There are already quite a few satellites in the sky that monitor greenhouse gases, but the capability is far from perfect. Most of these spacecraft can sense the likes of methane over very large areas but have poor resolution at the local level, at the scale, say, of a leaking pipeline. And those systems that can capture this detail will lack the wide-area coverage and the timely return to a particular location. The Carbon Mapper project wants to fix this either-or-situation by flying multiple high-resolution (30m) sensors that can deliver a daily view, or better.
They will look for super-emitters – the actors responsible for large releases of greenhouse gases. These would include oil and gas infrastructure, or perhaps poorly managed landfills and large dairy factory facilities.
Often these emitters want to know they have a problem but just don’t have the data to take action. “What we’ve learned is that decision support systems that focus just at the level of nation states, or countries, are necessary but not sufficient. We really need to get down to the scale of individual facilities, and even individual pieces of equipment, if we’re going to have an impact across civil society,” explained Riley Duren, Carbon Mapper’s CEO and a research scientist at the University of Arizona…The aim is to put the satellite data in the hands of everyone, and with the necessary tools also to be able to understand and use that information….
Excerpt from Jonathan Amos Carbon Mapper satellite network to find super-emitters, Reuters, April 16, 2021