CO2 production rate maxima in the deeper unsaturated zone of a semi-arid floodplain at Rifle, Colorado

Tetsu K Tokunaga1, Yongman Kim2, Jiamin Wan1, Wenming Dong3, Mark E Conrad4, Markus Bill5, Chad Hobson2, Kenneth Hurst Williams1 and Philip E Long6, (1)Lawrence Berkeley National Laboratory, Berkeley, CA, United States, (2)Lawrence Berkeley National Laboratory, Earth Science Divission, Berkeley, CA, United States, (3)Lawrence Berkeley National Laboratory, Energy Geoscience Division, Berkeley, United States, (4)Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, United States, (5)Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, CA, United States, (6)Lawrence Berkeley National Lab, Chelan, WA, United States