Climate & Carbon Sciences Program Research Area: The Carbon Cycle
Pathways of carbon cycling for plant allocation to leaves and roots. Belowground, plant C cascades through several reservoirs - live roots, dead roots, microbial biomass, and organic matter - each with their own mean residence times and respiratory losses. Some C is rapidly cycled in respiration or exudates. G/NPP = gross/net primary productivity; both gross and net are represented.
The Climate & Carbon Sciences Program of Lawrence Berkeley National Laboratory conducts active research on terrestrial, atmospheric, and oceanic dimensions of the global carbon cycle. Our primary goals are understanding and predicting ecosystem-climate feedbacks, atmospheric greenhouse gas concentrations, and the effect of climate change and land use on ecosystem processes. We also conduct research on advanced concepts in biological sequestration, applying the advanced light source to black carbon degradation and microbial genomics to new cyanobacteria products.
Highlights of our carbon cycle activities include:
adding methane biogeochemistry to the land surface model (CLM) used in the NCAR's CCSM (Community Climate System Model)
simulating high latitude abrupt climate change with robust physics and biogeochemistry
using natural abundance 14C to quantify fine root lifetimes and soil carbon turnover
completing one of the first top-down and bottom-up atmospheric carbon budgets
filling critical gaps in understanding the controls on soil carbon storage and turnover in order to enhance our ability to model the response of soils to climate change, land use change, and management.
New program directions include:
integrating multiple datastreams to create a regional testbed for coupled climate-carbon cycle models in the Southern Great Plains
developing a laboratory incubation testbed for evaluating decomposition of novel and potentially persistent compounds