Earth Interactions: Recent submissions
Now showing items 201-220 of 424
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Long-Duration Drought Variability and Impacts on Ecosystem Services: A Case Study from Glacier National Park, Montana
(American Meteorological Society, 2006)Instrumental climate records suggest that summer precipitation and winter snowpack in Glacier National Park (Glacier NP), Montana, vary significantly over decadal to multidecadal time scales. Because instrumental records ... -
Analysis of Mean Climate Conditions in Senegal (1971–98)
(American Meteorological Society, 2006)This paper presents a GIS-based analysis of climate variability over Senegal, West Africa. It responds to the need for developing a climate atlas that uses local observations instead of gridded global analyses. Monthly ... -
Exploring the Sensitivity of the Australian Climate to Regional Land-Cover-Change Scenarios under Increasing CO2 Concentrations and Warmer Temperatures
(American Meteorological Society, 2006)The potential role of the impacts of land-cover changes (LCCs) in the Australian climate is investigated within the context of increasing CO2 concentrations and temperature. Specifically, it is explored if possible scenarios ... -
Evidence for the Postconquest Demographic Collapse of the Americas in Historical CO2 Levels
(American Meteorological Society, 2006)This article promotes the hypothesis that the massive demographic collapse of the native populations of the Americas triggered by the European colonization brought about the abandonment of large expanses of agricultural ... -
A Review of Current Investigations of Urban-Induced Rainfall and Recommendations for the Future
(American Meteorological Society, 2005)Precipitation is a key link in the global water cycle and a proxy for changing climate; therefore, proper assessment of the urban environment?s impact on precipitation (land use, aerosols, thermal properties) will be ... -
Transient Future Climate over the Western United States Using a Regional Climate Model
(American Meteorological Society, 2005)Regional climate models (RCMs) have improved our understanding of the effects of global climate change on specific regions. The need for realistic forcing has led to the use of fully coupled global climate models (GCMs) ... -
Effects of Different Treatments of Pasture Restoration on Soil Trace Gas Emissions in the Cerrados of Central Brazil
(American Meteorological Society, 2006)Planted pastures (mainly Brachiaria spp) are the most extensive land use in the cerrado (savannas of central Brazil) with an area of approximately 50 ? 106 ha. The objective of the study was to assess the effects of pasture ... -
Forest Understory Fire in the Brazilian Amazon in ENSO and Non-ENSO Years: Area Burned and Committed Carbon Emissions
(American Meteorological Society, 2006)Understory fires, which burn the floor of standing forests, are one of the most important types of forest impoverishment in the Amazon, especially during the severe droughts of El Niño?Southern Oscillation (ENSO) episodes. ... -
Parameterization of Canopy Structure and Leaf-Level Gas Exchange for an Eastern Amazonian Tropical Rain Forest (Tapajós National Forest, Pará, Brazil)
(American Meteorological Society, 2005)Carbon flux of Amazonian primary forest vegetation has been shown to vary both spatially and temporally. Process-based models are adequate tools to understand the basis of such variation and can also provide projections ... -
The Daily Cycle of Low-Frequency Elephant Calls and Near-Surface Atmospheric Conditions
(American Meteorological Society, 2005)Elephant low-frequency calls and atmospheric conditions that influence the transmission and detection of these calls were recorded at a fixed location over a period of about 3 weeks at the end of the dry season in the ... -
Surface Boundary Conditions for Mesoscale Regional Climate Models
(American Meteorological Society, 2005)This paper utilizes the best available quality data from multiple sources to develop consistent surface boundary conditions (SBCs) for mesoscale regional climate model (RCM) applications. The primary SBCs include 1) fields ... -
Validation of MODIS Active Fire Detection Products Derived from Two Algorithms
(American Meteorological Society, 2005)Fire influences global change and tropical ecosystems through its connection to land-cover dynamics, atmospheric composition, and the global carbon cycle. As such, the climate change community, the Brazilian government, ... -
Rapid Assessment of Annual Deforestation in the Brazilian Amazon Using MODIS Data
(American Meteorological Society, 2005)The Brazilian government annually assesses the extent of deforestation in the Legal Amazon for a variety of scientific and policy applications. Currently, the assessment requires the processing and storing of large volumes ... -
Development of Forest Structure and Leaf Area in Secondary Forests Regenerating on Abandoned Pastures in Central Amazônia
(American Meteorological Society, 2005)The area of secondary forest (SF) regenerating from pastures is increasing in the Amazon basin; however, the return of forest and canopy structure following abandonment is not well understood. This study examined the ... -
3-PG Productivity Modeling of Regenerating Amazon Forests: Climate Sensitivity and Comparison with MODIS-Derived NPP
(American Meteorological Society, 2006)Potential forest growth predicted by the Physiological Principles in Predicting Growth (3-PG) model was compared for forest and deforested areas in the Legal Amazon to assess potential differing regeneration associated ... -
Physical Landscape Correlates of the Expansion of Mechanized Agriculture in Mato Grosso, Brazil
(American Meteorological Society, 2005)Mechanized agriculture is rapidly expanding in the state of Mato Grosso, Brazil. In the past five years, land area planted with soybeans, the state?s principal crop, has increased at an average rate of 19.4% yr?1. Drivers ... -
Improving Regional Model Simulations with Precipitation Assimilation
(American Meteorological Society, 2005)Although large-scale atmospheric reanalyses are now providing physical, realistic fields for many variables, precipitation remains problematic. As shown in recent studies, using a regional model to downscale the global ... -
Monitoring Selective Logging in Tropical Evergreen Forests Using Landsat: Multitemporal Regional Analyses in Mato Grosso, Brazil
(American Meteorological Society, 2005)Selective logging degrades tropical forests. Logging operations vary in timing, location, and intensity. Evidence of this land use is rapidly obscured by forest regeneration and ongoing deforestation. A detailed study of ... -
Surface Soil Changes Following Selective Logging in an Eastern Amazon Forest
(American Meteorological Society, 2005)In the Brazilian Amazon, selective logging is second only to forest conversion in its extent. Conversion to pasture or agriculture tends to reduce soil nutrients and site productivity over time unless fertilizers are added. ... -
Assessment of Tropical Forest Degradation with Canopy Fractional Cover from Landsat ETM+ and IKONOS Imagery
(American Meteorological Society, 2005)Tropical forests are being subjected to a wide array of disturbances in addition to outright deforestation. Selective logging is one of the most common disturbances ongoing in the Amazon, which results in significant changes ...