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Filtering by: Funding statement This research was supported by the NASA Terrestrial Ecology Program (NNX09AL51G). Remove constraint Funding statement: This research was supported by the NASA Terrestrial Ecology Program (NNX09AL51G). Creator Kennedy, Robert E. Remove constraint Creator: Kennedy, Robert E.

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Improving estimates of forest disturbance by combining observations from Landsat time series with U.S. Forest Service Forest Inventory and Analysis data

Creator:

Schroeder, Todd A., Healey, Sean P., Moisen, Gretchen G., Frescino, Tracey S., Cohen, Warren B., Huang, Chengquan, Kennedy, Robert E., and Yang, Zhiqiang

Abstract:

With earth's surface temperature and human population both on the rise a new emphasis has been placed on monitoring changes to forested ecosystems the world over. In the United States the U.S. Forest Service Forest Inventory and Analysis (FIA) program monitors the forested land base with field data collected over...

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was several years ago. The magnitude of this difference is further highlighted by the cumulative
Assessing the Carbon Consequences of Western Juniper (Juniperus occidentalis) Encroachment Across Oregon, USA

Creator:

Campbell, John L., Kennedy, Robert E., Cohen, Warren B., and Miller, Richard F.

Abstract:

Our ability to assess the continental impacts of woody encroachment remains compromised by the paucity of studies quantifying regional encroachment rates. This knowledge gap is especially apparent when it comes to quantifying the impact of woody encroachment on large-scale carbon dynamics. In this study, we use a combination of aerial...

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encroachment remains compromised by the paucity of studies measuring large-scale Research was funded in part
Spatial and temporal patterns of forest disturbance and regrowth within the area of the Northwest Forest Plan

Creator:

Kennedy, Robert E., Yang, Zhiqiang, Cohen, Warren B., Pfaff, Eric, Braaten, Justin, and Nelson, Peder

Abstract:

Understanding fine-grain patterns of forest disturbance and regrowth at the landscape scale is critical for effective management, particularly in forests in western Washington, Oregon, and California, U.S., where the policy known as the Northwest Forest Plan (NWFP) was imposed in 1994 over > 8 million ha of forest in an...

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ending vertices (Fig. 3a). This magnitude was divided by the pre-disturbance cover value to create a
Using Landsat-derived disturbance and recovery history and lidar to map forest biomass dynamics

Creator:

Pflugmacher, Dirk, Cohen, Warren B., Kennedy, Robert E., and Yang, Zhiqiang

Abstract:

Improved monitoring of forest biomass and biomass change is needed to quantify natural and anthropogenic effects on the terrestrial carbon cycle. Landsat's temporal and spatial coverage, moderate spatial resolution, and long history of earth observations provide a unique opportunity for characterizing vegetation changes across large areas and long time scales....

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plot size. The predicted AGB surface was then smoothed with a mean filter using the same 3 by 3 window
Spatiotemporal dynamics of recent mountain pine beetle and western spruce budworm outbreaks across the Pacific Northwest Region, USA

Creator:

Meigs, Garrett W., Kennedy, Robert E., Gray, Andrew N., and Gregory, Matthew J.

Abstract:

Across the western US, the two most prevalent native forest insect pests are mountain pine beetle (MPB; Dendroctonus ponderosae; a bark beetle) and western spruce budworm (WSB; Choristoneura freemani; a defoliator). MPB outbreaks have received more forest management attention than WSB outbreaks, but studies to date have not compared their...

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polygons, the change also could have been driven by non-insect disturbance. To resolve this poten- tially
United States Forest Disturbance Trends Observed Using Landsat Time Series

Creator:

Masek, Jeffrey G., Goward, Samuel N., Kennedy, Robert E., Cohen, Warren B., Moisen, Gretchen G., Schleeweis, Karen, and Huang, Chengquan

Abstract:

Disturbance events strongly affect the composition, structure, and function of forest ecosystems; however, existing US land management inventories were not designed to monitor disturbance. To begin addressing this gap, the North American Forest Dynamics (NAFD) project has examined a geographic sample of 50 Landsat satellite image time series to assess...

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the sample frame. This was accomplished by ranking each sample by total forest area (based on a US
Using Landsat-derived disturbance history (1972–2010) to predict current forest structure

Creator:

Pflugmacher, Dirk, Cohen, Warren B., and Kennedy, Robert E.

Abstract:

Lidar is currently the most accurate method for remote estimation of forest structure, but it has limited spatial and temporal coverage. Conversely, Landsat data are more widely available, but exhibit a weaker relationship with structure under medium to high leaf area conditions. One potentially valuable means of enhancing the relationship...

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estimates of forest structure. The main objective of this study was to test and demonstrate the utility of
MeigsDoInsectOutbreaks.pdf

Creator:

Meigs, Garrett W., Zald, Harold S. J., Campbell, John L., Keeton, William S., and Kennedy, Robert E.

Abstract:

Understanding the causes and consequences of rapid environmental change is an essential scientific frontier, particularly given the threat of climate-and land use-induced changes in disturbance regimes. In western North America, recent widespread insect outbreaks and wildfires have sparked acute concerns about potential insect-fire interactions. Although previous research shows that insect...

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was supported in part by NASA Headquarters under the NASA Earth and Space Science Fellowship Program
Does wildfire likelihood increase following insect outbreaks in conifer forests?

Creator:

Meigs, Garrett W., Campbell, John L., Zald, Harold S. J., Bailey, John D., Shaw, David C., and Kennedy, Robert E.

Abstract:

Although there is acute concern that insect‐caused tree mortality increases the likelihood or severity of subsequent wildfire, previous studies have been mixed, with findings typically based on stand‐scale simulations or individual events. This study investigates landscape‐ and regional‐scale wildfire likelihood following outbreaks of the two most prevalent native insect pests...

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. Biondi. Copyright: � 2015 Meigs et al. This is an open-access article distributed under the terms of the
Regional dynamics of forest canopy change and underlying causal processes in the contiguous U.S.

Creator:

Schleeweis, Karen, Goward, Samuel N., Huang, Chengquan, Masek, Jeffrey G., Moisen, Gretchen, Kennedy, Robert E., and Thomas, Nancy E.

Abstract:

The history of forest change processes is written into forest age and distribution and affects earth systems at many scales. No one data set has been able to capture the full forest disturbance and land use record through time, so in this study, we combined multiple lines of evidence to...

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DISTURBANCE REGIONAL DYNAMICS 1039 was created by weighting the severity-confidence ranks, then summing

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Academic Affiliation

College of Forestry6
Forest Ecosystems and Society5
College of Earth, Ocean, and Atmospheric Sciences3

Creator

Kennedy, Robert E.[remove]17
Cohen, Warren B.11
Meigs, Garrett W.7
Campbell, John L.5
Yang, Zhiqiang5
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Current results range from 2011 to 2015

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2010-201915

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English [eng]15

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Attribution 3.0 United States3

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Article15

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In Copyright6

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