USGS scientists investigate soil CO2 flux, temperature, and plant vigor at the P

During November 4-6, an interdisciplinary group of USGS scientists, including an ecologist, a botanist, and volcano scientists, collected gas samples for chemical and isotopic analysis and made measurements of soil CO2 flux and soil temperature. The data will be used to create CO2 flux and temperature maps, which will be compared to earlier studies to assess change over the last several decades in the Puhimau thermal area within Hawai‘i Volcanoes National Park. USGS image by P. Nadeau.