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Soil–Atmosphere Trace Gas Exchange in Semiarid and Arid Zones

^a CSIRO Marine and Atmospheric Research, P.B.1 Aspendale Victoria, Australia 3195 & CSIRO Marine and Atmospheric Research & Cooperative Research Centre for Greenhouse Accounting, P.B.1 Aspendale Victoria, Australia 3195
^b School of Applied Sciences and Engineering, Monash University-Gippsland, Northways Rd, Churchill Victoria, Australia 3142

View larger version (39K): [in this window] [in a new window]   Fig. 1. Schematic of the methane exchange between the atmosphere and soil in semiarid regions in the wet and the dry seasons showing different net exchange associated with different environmental conditions in the dry season. The vertical arrow on the right in each panel is the net contribution determined as the sum of the metanotrophic CH4 consumption and subterranean termite CH4 production within the soil.

View larger version (14K): [in this window] [in a new window]   Fig. 2. Schematic of the nitrogen transformations associated with the terrestrial nitrogen cycle and the production of nitrous oxide and nitric oxide.