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In situ evaluation of air‐sea gas exchange parameterizations using novel conservative and volatile tracers
Measurements of air-sea gas exchange rates are reported from two deliberate tracer experiments in the southern North Sea during February 1992 and 1993. A conservative tracer, spores of the bacteriumExpand
Climatological mean and decadal change in surface ocean pCO2, and net seaair CO2 flux over the global oceans
A climatological mean distribution for the surface water pCO2 over the global oceans in non-El Nino conditions has been constructed with spatial resolution of 4° (latitude) ×5° (longitude) for aExpand
Evidence for slow mixing across the pycnocline from an open-ocean tracer-release experiment
THE distributions of heat, salt and trace substances in the ocean thermocline depend on mixing along and across surfaces of equal density (isopycnal and diapycnal mixing, respectively). MeasurementsExpand
Mixing of a tracer in the pycnocline
A patch of sulfur hexafluoride was released in May 1992 in the eastern North Atlantic on an isopycnal surface near 300 m depth and was surveyed over a period of 30 months as it dispersed across andExpand
The dynamics of a rapidly escaping atmosphere: Applications to the evolution of Earth and Venus
A simple, idealized model for the rapid escape of a hydrogen thermosphere provides some quantitative estimates for the energy-limited flux of escaping particles. The model assumes that the atmosphereExpand
Ocean acidification due to increasing atmospheric carbon dioxide
The oceans cover over two-thirds of the Earth’s surface. They play a vital role in global biogeochemical cycles, contribute enormously to the planet’s biodiversity and provide a livelihood forExpand
Biological homeostasis of the global environment: the parable of Daisyworld
A model of animaginary planet having a very simple biosphere, consisting of just two species of daisy of different colours, sketches out the elements of a biological feedback system which might help regulate the temperature of the earth. Expand
COPSE: a new model of biogeochemical cycling over Phanerozoic time
We present a new model of biogeochemical cycling over Phanerozoic time. This work couples a feedback-based model of atmospheric O2 and ocean nutrients (Lenton and Watson, 2000a, 2000b) with aExpand
Mesoscale Iron Enrichment Experiments 1993-2005: Synthesis and Future Directions
The findings of these 12 FeAXs reveal that iron supply exerts controls on the dynamics of plankton blooms, which in turn affect the biogeochemical cycles of carbon, nitrogen, silicon, and sulfur and ultimately influence the Earth climate system. Expand