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Articles 1 - 5 of 5
Full-Text Articles in Entire DC Network
The Influence Of Land Use And Climate Change On Forest Biomass And Composition In Massachusetts, Usa, J. R. Thompson, D. R. Foster, R. Scheller, David B. Kittredge
The Influence Of Land Use And Climate Change On Forest Biomass And Composition In Massachusetts, Usa, J. R. Thompson, D. R. Foster, R. Scheller, David B. Kittredge
David B. Kittredge
Land use and climate change have complex and interacting effects on naturally dynamic forest landscapes. To anticipate and adapt to these changes, it is necessary to understand their individual and aggregate impacts on forest growth and composition. We conducted a simulation experiment to evaluate regional forest change in Massachusetts, USA over the next 50 years (2010–2060). Our objective was to estimate, assuming a linear continuation of recent trends, the relative and interactive influence of continued growth and succession, climate change, forest conversion to developed uses, and timber harvest on live aboveground biomass (AGB) and tree species composition. We examined 20 …
Evaluating The Influence Of Disturbance And Climate On Red Spruce (Picea Rubens Sarg.) Community Dynamics At Its Southern Range Margin, Relena R. Ribbons
Evaluating The Influence Of Disturbance And Climate On Red Spruce (Picea Rubens Sarg.) Community Dynamics At Its Southern Range Margin, Relena R. Ribbons
Masters Theses 1911 - February 2014
Picea rubens(red spruce) populations experienced a synchronous rangewide decline in growth and vigor starting in the 1960’s, which was likely caused by climate change or environmental disturbances (e.g., acid deposition); However, it is yet unknown if populations continue to decline or have recovered. In the context of global warming, red spruce is a species of concern because it is at its southern continuous range margin in Massachusetts. This study uses tree-ring data coupled with population data from permanent plots to quantify the status of red spruce in Massachusetts. Tree cores were extracted from red spruce and used to examine …
Where Do We Stand On Global Warming?, Raymond S. Bradley
Where Do We Stand On Global Warming?, Raymond S. Bradley
Raymond S Bradley
Global temperatures have risen by ~0.8°C since the end of the 19th century. This increase has not been linear, as there have been periods when temperatures were stable for short periods before rising once again. The reasons for these changes in the rate of temperature rise are related to anthropogenic factors (sulphate aerosol pollution versus greenhouse gas inputs to the atmosphere) as well as to natural factors (volcanic eruptions, solar irradiance variations, El Ni.o/Southern Oscillation [ENSO] fluctuations, etc). Over the last decade or so, temperatures have not risen at the same rate as in previous decades, and this has led …
Natural Archives, Changing Climates, Raymond S. Bradley
Natural Archives, Changing Climates, Raymond S. Bradley
Raymond S Bradley
Climatic changes have occurred throughout human history, but instrumental measurements do not provide us with a very long perspective on climate variations. In many regions, instrumental records only extend back a century or two. To understand the longer-term variability of the climate system, we rely on natural archives— sediments, ice caps, peat bogs, cave deposits, banded corals and tree rings—in which a record of past changes in climate has been preserved. They are a treasure trove of the climatic and environmental history of the planet and provide information about factors that may have caused the climate to change, such as …
Local Actions, National Frameworks: A Dual-Scale Comparison Of Climate Adaptation Planning On Two Continents, Elisabeth M. Hamin, Nicole Gurran
Local Actions, National Frameworks: A Dual-Scale Comparison Of Climate Adaptation Planning On Two Continents, Elisabeth M. Hamin, Nicole Gurran
Elisabeth M. Hamin
This study explores emerging approaches to local climate change adaptation planning in the United States and Australia, and seeks to explain why some local authorities have begun to take action despite weak national and state level directives. We compare strategic documents from 13 local authorities across the two nations, representing the “first generation” of adaptation plans. Our focus is on potential explanations for early engagement in adaptation planning – size, location and risk level of the municipality, the existence of national or state mandates and access to supra local resources or support. We also explore the nature and type of …