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Download Profile: Changes in the Atmospheric Methane Concentration in the Arctic and Antarctic Regions for the Last...
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[Download this proceeding]Variations of the atmospheric CH4 concentration for the last 110 kyrs
were deduced from deep ice cores drilled at NGRIP, Greenland and Dome
Fuji, Antarctica. The CH4 concentration was higher in the Arctic than
in the Antarctica throughout the period. The interpolar difference of
the CH4 concentration was variable with time, showing that larger and
smaller differences appeared in warmer and colder periods,
respectively. In order to examine the CH4 concentration variations in
terms of its source strength, the CH4 data obtained from both cores
were analyzed using a three-box model. The results suggested that the
CH4 concentration variations during the last ice age were mainly caused
by changes in CH4 sources in northern middle and high latitudes. On the
other hand, the CH4 concentration variations during the Termination I
and the Holocene were expected to ascribe mainly to tropical CH4
sources.
Author: S. Aoki (aoki at mail dot tains dot tohoku dot ac dot jp)
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| Talk History | |
| Friday, September 30 | | · | Discussion Panel |
| · | Nitrogen Regulation of Carbon Sequestration in Terrestrial Ecosystems in Respons |
| · | The Role of Water Relations in Driving Grassland Ecosystem Responses to Rising A |
| · | Unraveling the Decline in High-latitude Surface Ocean Carbonate |
| Thursday, September 29 | | · | Hazards of Temperature on Food Availability in Changing Environments (HOT-FACE) |
| · | The Amazon and the Modern Carbon Cycle |
| · | New Coupled Climate-carbon Simulations from the IPSL Model |
| · | The Changing Carbon Cycle |
| · | What are the Most Important Factors for Climate-carbon Cycle Coupling? |
| · | CO2 Uptake of the Marine Biosphere |
| · | European-wide Reduction in Primary Productivity Caused by the Heat and Drought i |
| · | Persistence of Nitrogen Limitation over Terrestrial Carbon Uptake |
| · | Atmospheric CO2, Carbon Isotopes, the Sun, and Climate Change over the Last Mill |
| · | Proposing a Mechanistic Understanding of Atmospheric CO2 During the late Pleist |
| · | Greenhouse Gas (CO2, CH4) and Climate Evolution since 650 kyrs Deduced from Anta |
| Wednesday, September 28 | | · | (In and) Out of Africa: Estimating the Carbon Exchange of a Continent |
| · | Recent Shifts in Soil Dynamics on Growing Season Length, Productivity, and... |
| · | Interannual Variability in the Carbon Exchange Using an Ecosystem-fire Model |
| · | Photosynthesis and Respiration in Forests in Response to Environmental Changes |
| · | Seasonal and Interannual Variability in Net Ecosystem CO2 Exchange in Japan |
| · | Estimating Landscape-level Carbon Fluxes from Tower CO2 Mixing Ratio Measurement |
| · | Monitoring Effects in Climate and Fire Regime on Net Ecosystem Production |
| · | Radiative Forcing from a Boreal Forest Fire |
| · | The Influence of Soil and Water Management on Carbon Erosion and Burial |
| · | Spatial and Temporal Patterns of CO2, CH4, and N2O Fluxes in Ecosystems |
| · | Modeling the History of Terrestrial Carbon Sources and Sinks |
| · | The Age of Carbon Respired from Terrestrial Ecosystems |
| · | Discussion Panel |
| · | The Underpinnings of Land Use History |
| Tuesday, September 27 | | · | Regional CO2 Fluxes for North America Estimated from NOAA/CMDL Observatories |
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