Ecosystem and soil respiration radiocarbon detects old carbon release as a fingerprint of warming and permafrost destabilization with climate change.

The permafrost region has accumulated organic carbon in cold and waterlogged soils over thousands of years and now contains three times as much carbon as the atmosphere. Global warming is degrading permafrost with the potential to accelerate climate change as increased microbial decomposition releases soil carbon as greenhouse gases. A 19-year time series of soil and ecosystem respiration radiocarbon from Alaska provides long-term insight into changing permafrost soil carbon dynamics in a warmer world.

Moisture stress limits radial mixing of non-structural carbohydrates in sapwood of trembling aspen.

Dynamics in non-structural carbohydrate (NSC) pools may underlie observed drought legacies in tree growth. We assessed how aridity influences the dynamics of different-aged NSC pools in tree sapwood at two sites with differing climate conditions ('wet' vs. 'dry') that also experienced widespread regional drought five years earlier.

An incubation method to determine the age of available nonstructural carbon in woody plant tissues.

Radiocarbon (∆14C) measurements of nonstructural carbon enable inference on the age and turnover time of stored photosynthate (e.g., sugars, starch), of which the largest pool in trees resides in the main bole.

A tris(alkyl)yttrium compound containing six beta-agostic Si-H interactions.

The new homoleptic rare earth compound [Y(C(SiHMe(2))(3))(3)] () is prepared in 82% yield by salt metathesis of YCl(3) and 3 equivalents of [KC(SiHMe(2))(3)] (); two beta-agostic Y(H-Si) interactions are observed for each C(SiHMe(2))(3) ligand in , giving six agostic interactions per yttrium(iii) center.