A5065732138- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Oceanographic and Atmospheric Processes
- Hydrocarbon exploration and reservoir analysis
- Marine and coastal ecosystems
- Isotope Analysis in Ecology
- Climate variability and models
- Methane Hydrates and Related Phenomena
Imperial College London
2020-2024
Vegetation and soils are taking up approximately 30% of anthropogenic carbon dioxide emissions because small imbalances in large gross exchanges from productivity turnover that poorly constrained. We combined a new budget radiocarbon produced by nuclear bomb testing the 1960s with model simulations to evaluate cycling terrestrial vegetation. found most state-of-the-art vegetation models used Coupled Model Intercomparison Project underestimated accumulation biomass. Our findings, constraints...
ABSTRACT Radiocarbon observations (Δ 14 C) in dissolved inorganic carbon (DIC) of seawater provide useful information about ocean cycling and circulation. To deliver high-quality observations, the Laboratory Ion Beam Physics (LIP) at ETH-Zurich developed a new simplified method allowing rapid analysis radiocarbon DIC small samples, which is continually assessed by following internal quality controls. However, comparison with externally produced C measurements to better establish an...
Abstract Observations of oceanic transient tracers have indicated that the circulation in Southern Ocean has changed recent decades, potentially driven by changes external climate forcing. Here, we use CESM Large Ensemble to analyze two are affected ocean circulation: partial pressure chlorofluorocarbon‐12 (pCFC12) and idealized model tracer Ideal Age (IAGE) over 1991 2005 period. The small ensemble mean change IAGE suggests there been very little externally forced this period, contrast...
Abstract Anthropogenic perturbations from fossil fuel burning, nuclear bomb testing, and chlorofluorocarbon (CFC) use have created useful transient tracers of ocean circulation. The atmospheric 14 C/C ratio (∆ C) peaked in the early 1960s has decreased now to pre‐industrial levels, while CFC‐11 CFC‐12 concentrations 1990s 2000s, respectively, by 10%–20%. We present first analysis a decade new observations (2007 2018–2019) give comprehensive overview changes ∆ C CFC concentration since WOCE...