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A Suite Of Early Eocene (~ 55 Ma) Climate Model Boundary Conditions, N. Herold, J. Buzan, M. Seton, A. Goldner, J. A. M. Green, R. D. Muller, P. Markwick, M. Huber, Matthew Huber
A Suite Of Early Eocene (~ 55 Ma) Climate Model Boundary Conditions, N. Herold, J. Buzan, M. Seton, A. Goldner, J. A. M. Green, R. D. Muller, P. Markwick, M. Huber, Matthew Huber
New Hampshire EPSCoR
We describe a set of early Eocene (~ 55 Ma) climate model boundary conditions constructed in a self-consistent reference frame and incorporating recent data and methodologies. Given the growing need for uniform experimental design within the Eocene climate modelling community and the challenges faced in simulating the prominent features of Eocene climate, we make publicly available our data sets of Eocene topography, bathymetry, tidal dissipation, vegetation, aerosol distributions and river runoff. Major improvements in our boundary conditions over previous efforts include the implementation of the ANTscape palaeotopography of Antarctica, more accurate representations of the Drake Passage and Tasman Gateway, as …
Sources Of Uncertainty In Estimating Stream Solute Export From Headwater Catchments At Three Sites, Ruth D. Yanai, Naoko Tokuchi, John L. Campbell, Mark B. Green, Eiji Matsuzaki, Stephanie N. Laseter, Cindi L. Brown, Amey S. Bailey, Pilar Lyons, Carrie R. Levine, Donald C. Buso, Gene E. Likens, Jennifer D. Knoepp, Keitaro Fukushima
Sources Of Uncertainty In Estimating Stream Solute Export From Headwater Catchments At Three Sites, Ruth D. Yanai, Naoko Tokuchi, John L. Campbell, Mark B. Green, Eiji Matsuzaki, Stephanie N. Laseter, Cindi L. Brown, Amey S. Bailey, Pilar Lyons, Carrie R. Levine, Donald C. Buso, Gene E. Likens, Jennifer D. Knoepp, Keitaro Fukushima
New Hampshire EPSCoR
Uncertainty in the estimation of hydrologic export of solutes has never been fully evaluated at the scale of a small-watershed ecosystem. We used data from the Gomadansan Experimental Forest, Japan, Hubbard Brook Experimental Forest, USA, and Coweeta Hydrologic Laboratory, USA, to evaluate many sources of uncertainty, including the precision and accuracy of measurements, selection of models, and spatial and temporal variation. Uncertainty in the analysis of stream chemistry samples was generally small but could be large in relative terms for solutes near detection limits, as is common for ammonium and phosphate in forested catchments. Instantaneous flow deviated from the theoretical …
Climate Change And Forest Fires Synergistically Drive Widespread Melt Events Of The Greenland Ice Sheet, Kaitlin M. Keegan, Mary R. Albert, Joseph R. Mcconnell, Ian Baker
Climate Change And Forest Fires Synergistically Drive Widespread Melt Events Of The Greenland Ice Sheet, Kaitlin M. Keegan, Mary R. Albert, Joseph R. Mcconnell, Ian Baker
New Hampshire EPSCoR
In July 2012, over 97% of the Greenland Ice Sheet experienced surface melt, the first widespread melt during the era of satellite remote sensing. Analysis of six Greenland shallow firn cores from the dry snow region confirms that the most recent prior widespread melt occurred in 1889. A firn core from the center of the ice sheet demonstrated that exceptionally warm temperatures combined with black carbon sediments from Northern Hemisphere forest fires reduced albedo below a critical threshold in the dry snow region, and caused the melting events in both 1889 and 2012. We use these data to project the …
Changing Forest Water Yields In Response To Climate Warming: Results From Long-Term Experimental Watershed Sites Across North America, Irena F. Creed, Adam T. Spargo, Julia A. Jones, Jim M. Buttle, Mary B. Adams, Fred D. Beall, Eric G. Booth, John L. Campbell, Dave Clow, Kelly Elder, Mark B. Green, Nancy B. Grimm, Chelcy Miniat, Patricia Ramlal, Amartya Saha, Stephen Sebestyen, Dave Spittlehouse, Shannon Sterling, Mark W. Williams, Rita Winkler, Huaxia Yao
Changing Forest Water Yields In Response To Climate Warming: Results From Long-Term Experimental Watershed Sites Across North America, Irena F. Creed, Adam T. Spargo, Julia A. Jones, Jim M. Buttle, Mary B. Adams, Fred D. Beall, Eric G. Booth, John L. Campbell, Dave Clow, Kelly Elder, Mark B. Green, Nancy B. Grimm, Chelcy Miniat, Patricia Ramlal, Amartya Saha, Stephen Sebestyen, Dave Spittlehouse, Shannon Sterling, Mark W. Williams, Rita Winkler, Huaxia Yao
New Hampshire EPSCoR
Climate warming is projected to affect forest water yields but the effects are expected to vary. We investigated how forest type and age affect water yield resilience to climate warming. To answer this question, we examined the variability in historical water yields at long-term experimental catchments across Canada and the United States over 5-year cool and warm periods. Using the theoretical framework of the Budyko curve, we calculated the effects of climate warming on the annual partitioning of precipitation (P) into evapotranspiration (ET) and water yield. Deviation (d) was defined as a catchment's change in actual ET divided by P …
The Challenge Of Simulating The Warmth Of The Mid-Miocene Climatic Optimum In Cesm1, A. Goldner, N. Herold, Matthew Huber
The Challenge Of Simulating The Warmth Of The Mid-Miocene Climatic Optimum In Cesm1, A. Goldner, N. Herold, Matthew Huber
New Hampshire EPSCoR
The mid-Miocene climatic optimum (MMCO) is an intriguing climatic period due to its above-modern temperatures in mid-to-high latitudes in the presence of close-to-modern CO2 concentrations. We use the recently released Community Earth System Model (CESM1.0) with a slab ocean to simulate this warm period, incorporating recent Miocene CO2 reconstructions of 400 ppm (parts per million). We simulate a global mean annual temperature (MAT) of 18 °C, ~4 °C above the preindustrial value, but 4 °C colder than the global Miocene MAT we calculate from climate proxies. Sensitivity tests reveal that the inclusion of a reduced Antarctic ice sheet, an equatorial …
Gas Diffusivity And Permeability Through The Firn Column At Summit, Greenland: Measurements And Comparison To Microstructural Properties, A. C. Adolph, M. R. Albert
Gas Diffusivity And Permeability Through The Firn Column At Summit, Greenland: Measurements And Comparison To Microstructural Properties, A. C. Adolph, M. R. Albert
New Hampshire EPSCoR
The physical structure of polar firn plays a key role in the mechanisms by which glaciers and ice sheets preserve a natural archive of past atmospheric composition. This study presents the first measurements of gas diffusivity and permeability along with microstructural information measured from the near-surface firn through the firn column to pore close-off. Both fine- and coarse-grained firn from Summit, Greenland are included in this study to investigate the variability in firn caused by seasonal and storm-event layering. Our measurements reveal that the porosity of firn (derived from density) is insufficient to describe the full profiles of diffusivity and …
The Stewardship Network: New England Engagement Initiative Final Report, Molly Donovan, Malin Clyde, Ellen Snyder
The Stewardship Network: New England Engagement Initiative Final Report, Molly Donovan, Malin Clyde, Ellen Snyder
New Hampshire EPSCoR
No abstract provided.