Our work addresses the predictability of carbon absorption by ecosystems across the globe, particularly in dry regions. We compare 3 different models, including a deep learning model that can learn from past environmental conditions, and show that this helps improve predictions. Still, challenges remain in dry areas due to varying vulnerabilities to drought. As drought conditions intensify globally, it's crucial to understand the varying impacts on ecosystem function.

This paper combines a literature review with a 1D Hg speciation and bioaccumulation model to assess how feeding strategy affects inorganic and methylmercury at the base of marine food webs. We find filter feeders have higher MeHg, while suspension feeders have very low MeHg, highlighting feeding strategy as a key driver of MeHg variability.

Carbon monoxide (CO) is an important indirect greenhouse gas, but its terrestrial sinks and sources are poorly understood. We present the first CO flux measurements using the eddy covariance method in an Arctic peatland. Our results show that CO fluxes are dominated by two processes: radiation-driven emissions and soil uptake. Dry peatland areas acted as CO sinks, while wetter areas were CO sources. Our findings suggest that current global models may underestimate Arctic CO emissions.

We use a 27-year eddy-resolving ocean-biogeochemical simulation to assess how mesoscale eddies modulate air–sea CO₂ fluxes in the Southern Ocean. Eddies act as persistent carbon sinks, with anticyclones showing enhanced carbon uptake efficiency. Mesoscale features account for ~10 % of the total carbon uptake in the Southern Ocean and about 1 % of the anomalous carbon uptake.

To shed light on the interactions between soil nitrogen (N) and carbon (C), we set up a model “experiment” in silico to test several hypothesized responses of decomposers to N. We found that decomposers were stimulated by N when decomposing high C:N detritus, but inhibited when decomposing low C:N, processed organic C. The consequence is that under exogenous N addition (e.g., contemporary N deposition), forests may accumulate light fraction C predominantly, at the expense of coarse detritus.