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Scientists Call for Better Greenhouse Gas Monitoring System
CU-Boulder Research Associate Melinda Marquis and National Oceanic and Atmospheric Administration scientist Pieter Tans, said that the need for improved regional greenhouse gas measurements is critical with atmospheric carbon dioxide concentrations now at 385 parts per million and rising.
They said while the present observation network can measure CO2 fluxes on a continental scale, charting regional emissions where significant mitigation efforts are underway needs a more densely populated network.
"The question is whether scientists in the United States and around the world have what they need to monitor regional fluxes in atmospheric carbon dioxide. Right now, they don't," said Marquis, a scientist at the Cooperative Institute for Research in Environmental Sciences, a joint institute of CU-Boulder and NOAA.
She said while CO2 levels are climbing by 2 parts per million annually, a rate expected to increase as China and India continue to industrialize, effective regional CO2 monitoring strategies are virtually nonexistent.
Scientists are limited in their ability to distinguish between distant and nearby carbon sources and 'sinks,' or storage areas, for example, by the accuracy of atmospheric transport models that reflect details of terrain, winds and the mixing of gases near observation sites.
"We are in uncharted territory as far as knowing how safe these high CO2 levels are for the Earth. Instead of tackling a very complex challenge with the equivalent of Magellan's maps, we need to use the equivalent of Google Earth," she said.
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