Three dimensional soil organic matter distribution, accessibility and microbial respiration in macro-aggregates using osmium staining and synchrotron X-ray CT

microbial respiration in macro-aggregates using osmium staining and synchrotron X-ray CT Barry G Rawlins1, Joanna Wragg1, Christina Rheinhard2, Robert C Atwood2, Alasdair Houston3, R. Murray Lark1, and Sebastian Rudolph1 1British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK 2Diamond Light Source, Harwell Science & Innovation Campus, Chilton, OX11 0DE 3SIMBIOS, Abertay University, 40 Bell street, Dundee DD1 1HG, UK Correspondence to: Barry G Rawlins (bgr@bgs.ac.uk)