Japan Geoscience Union Meeting 2014

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Poster

Symbol A (Atmospheric, Ocean, and Environmental Sciences) » A-CG Complex & General

[A-CG36_30PO1] Science in the Arctic Region

Wed. Apr 30, 2014 6:15 PM - 7:30 PM Poster (3F)

Convener:*Saitoh Sei-Ichi(Faculty of Fisheries Sciences, Hokkaido University), Jun Inoue(National Instituteof Polar Resarch), Naomi Harada Naomi(Japan Agency for Marine-Earth Science and Technology), Rikie Suzuki(Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology)

6:15 PM - 7:30 PM

[ACG36-P14] Automatic measurement of gas emission/uptake of Alaskan permafrost soils

Seiichiro YONEMURA1, Masao UCHIDA2, *Miyuki KONDO2 (1.NIAES, 2.NIES)

Keywords:permafrost soil, Alaska, CO2, NO, laboratory experiment

The release of carbon from the decomposition of organic matters in permafrost soils are very important for the acceleration of global watming . We applied our dynamic system to Alaskan soils and measured temperature dependence of gas (CO2, CH4, N2O, NO, H2, CO) emission/uptake. The Four core samples were placed on petri-dishes which were put into chambers where temperature was controlled. CO2 emission from soils showed variations different from sample to sample. Even at -5C, CO2 emissions were observed. From the time series of CO2 emission rates, we estimated Q10 values. Q10 values were similar between 5-15C and 15 and 25C. Some soils also temperature-dependently emit NO, CO and N2O.