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Evidence For A Widespread Climatic Anomaly At Around 9.2 Ka Before Present, Dominik Fleitmann, Manfred Mudelsee, Stephen J. Burns, Raymond S. Bradley, Jan Kramers, Albert Matter
Evidence For A Widespread Climatic Anomaly At Around 9.2 Ka Before Present, Dominik Fleitmann, Manfred Mudelsee, Stephen J. Burns, Raymond S. Bradley, Jan Kramers, Albert Matter
Raymond S Bradley
No abstract provided.
Proxy-Based Reconstructions Of Hemispheric And Global Surface Temperature Variations Over The Past Two Millennia, M. E. Mann, Z. Zhang, M. K. Hughes, Raymond S. Bradley, S. K. Miller, S. Rutherford, F. Ni
Proxy-Based Reconstructions Of Hemispheric And Global Surface Temperature Variations Over The Past Two Millennia, M. E. Mann, Z. Zhang, M. K. Hughes, Raymond S. Bradley, S. K. Miller, S. Rutherford, F. Ni
Raymond S Bradley
Following the suggestions of a recent National Research Council report [NRC (National Research Council) (2006) Surface Temperature Reconstructions for the Last 2,000 Years (Natl Acad Press, Washington, DC).], we reconstruct surface temperature at hemispheric and global scale for much of the last 2,000 years using a greatly expanded set of proxy data for decadal-to-centennial climate changes, recently updated instrumental data, and complementary methods that have been thoroughly tested and validated with model simulation experiments. Our results extend previous conclusions that recent Northern Hemisphere surface temperature increases are likely anomalous in a long-term context. Recent warmth appears anomalous for at least …
The Younger Dryas And The Sea Of Ancient Ice, Raymond S. Bradley, John H. England
The Younger Dryas And The Sea Of Ancient Ice, Raymond S. Bradley, John H. England
Raymond S Bradley
We propose that prior to the Younger Dryas period, the Arctic Ocean supported extremely thick multi-year fast ice overlain by superimposed ice and firn. We re-introduce the historical term paleocrystic ice to describe this. The ice was independent of continental (glacier) ice and formed a massive floating body trapped within the almost closed Arctic Basin, when sea-level was lower during the last glacial maximum. As sea-level rose and the Barents Sea Shelf became deglaciated, the volume of warm Atlantic water entering the Arctic Ocean increased, as did the corresponding egress, driving the paleocrystic ice towards Fram Strait. New evidence shows …
Climate Change Scenario For Costa Rican Montane Forests, A. V. Karmalkar, Raymond S. Bradley, H. F. Diaz
Climate Change Scenario For Costa Rican Montane Forests, A. V. Karmalkar, Raymond S. Bradley, H. F. Diaz
Raymond S Bradley
Tropical montane cloud forests are characterized by persistent immersion in clouds, an important source of moisture during the dry season. Future changes in temperature and precipitation could alter cloud cover at the vegetation level and seriously affect mountain ecosystems. A regional climate modeling study that focuses on changes in the distributions of temperature and precipitation in Costa Rica shows, in general, an increase in temperature and a decrease in precipitation under the A2 scenario. At high elevations, warming is amplified and future temperature distribution lies outside the range of present-day distribution. Compared to the Caribbean side, temperature changes are greater …