Now showing items 1-10 of 13
Southern pine productivity: Effects of carbon dioxide increases and related predicted temperature and precipitation changes
Forest ecological forecasting results and decision support tools are now available to foresters in the southern United States.
On-the-Fly Massively Multitemporal Change Detection Using Statistical Quality Control Charts and Landsat Data
(Institute of Electrical and Electronics Engineers (IEEE), 2014-06)
One challenge to implementing spectral change detection algorithms using multitemporal Landsat data is that key dates and periods are often missing from the record due to weather disturbances and lapses in continuous ...
Analysis of Crop Phenology Using Time-Series MODIS Data and Climate Data
Understanding crop phenology is fundamental to agricultural production, management, planning and decision-making. In the continental United States, key phenological stages are strongly influenced by meteorological and ...
A model using marginal efficiency of investment to analyze carbon and nitrogen interactions in terrestrial ecosystems
(European Geosciences Union, 2014-09-12)
Carbon (C) and nitrogen (N) cycles are coupled in terrestrial ecosystems through multiple processes including photosynthesis, tissue allocation, respiration, N fixation, N uptake, and decomposition of litter and soil organic ...
Mining disturbances in Virginia's southwestern coalfield, 1984-2011
Coal mining has been taking place in southwestern Virginia's Appalachian coalfield for more than a century, and surface mining has been a common method of coal extraction since the 1960s. Coal surface mining creates a ...
USA PhotoMaps: a User Guide for Natural Resource Professionals and Educators
(Virginia Cooperative Extension, 2011-09-05)
USAPhotoMaps requires that you know how to operate a GPS unit and organize and collect field data associated with a GPS unit. This free software package enables you to download GPS waypoints (or tracks) from your GPS ...
Mapping Stable Nitrogen Isotopes Using Hyperspectral Imagery
As nitrogen deposition increases globally, ecosystem changes will occur. It is important to understand the growth response of different ecosystems and where nitrogen retention will occur. Stable isotopes of foliar nitrogen ...
Investigating Forest Conversion Across Several Scales of Urbanization in the Eastern United States
Urbanization in the United States has clearly impacted land cover, and land use and land cover change (LULCC) patterns. A great body of literature has addressed the negative results of increased sprawl and a supporting ...
Crowds for Clouds: Using an Internet Workforce to Interpret Satellite Images
A chronologically ordered sequence of satellite images can be used to learn how natural features of the landscape change over time. For example, we can learn how forests react to human interventions or climate change. ...