A5081604740- Plant Water Relations and Carbon Dynamics
- Fire effects on ecosystems
- Tree-ring climate responses
- Forest ecology and management
- Rangeland and Wildlife Management
- Forest Management and Policy
- Plant and animal studies
- Remote Sensing and LiDAR Applications
- Insect and Arachnid Ecology and Behavior
- Remote Sensing in Agriculture
- Atmospheric chemistry and aerosols
- Aeolian processes and effects
- Landslides and related hazards
- Meteorological Phenomena and Simulations
- Tree Root and Stability Studies
- Atmospheric aerosols and clouds
- Ecology and Vegetation Dynamics Studies
- Fire dynamics and safety research
- Evacuation and Crowd Dynamics
- Plant responses to elevated CO2
- Water Quality Monitoring Technologies
- Global Education and Multiculturalism
- Laser-induced spectroscopy and plasma
- Wind and Air Flow Studies
- Coastal and Marine Management
Oregon State University
2020-2024
Pacific Northwest Research Station
2020-2023
Rothamsted Research
2021
West Virginia University
2016-2018
University of Tennessee at Knoxville
2012
Abstract Wildfires devastated communities in Oregon and Washington September 2020, burning almost as much forest west of the Cascade Mountain crest (“the westside”) 2 weeks (~340,000 ha) previous five decades (~406,00 ha). Unlike dry forests interior western United States, temperate rain Pacific Northwest have experienced limited recent fire activity, debates surrounding what drove 2020 fires, management strategies to adapt similar future events, necessitate a scientific evaluation fires. We...
Abstract Fire is an integral natural disturbance in the moist temperate forests of Pacific Northwest United States, but future changes remain uncertain. regimes this climatically and biophysically diverse region are complex, typically climate limited. One challenge for interpreting potential conveying projection uncertainty. Using projections Energy Release Component (ERC) derived from 12 global models (GCM) that vary performance relative to region's contemporary climate, we simulated...
Abstract Forests account for a large portion of sequestered carbon, much which is stored as wood in trees. The rate carbon accumulation aboveground plant material, or net primary productivity ( aNPP ), quantifies annual to decadal variations forest sequestration. Permanent plots are often used estimate but usually not annually resolved and take many years develop long data set. Tree rings unique infrequently source measuring , benefit from fine spatial (individual trees) temporal (annual)...
Ecosystem models show divergent responses of the terrestrial carbon cycle to global change over next century. Individual model evaluation and multimodel comparisons with data have largely focused on individual processes at subannual decadal scales. Thus far, data-based evaluations emergent ecosystem climate CO2 multidecadal centennial timescales been rare. We compared sensitivity net primary productivity (NPP) temperature, precipitation, in ten sensitivities found tree-ring reconstructions...
Abstract The response of understory trees to climate variability is key understanding current and future forest dynamics. However, analyses climatic effects on tree growth have primarily focused the upper canopy, leaving dynamics unresolved. We analyzed differences in sensitivity based canopy position four common species ( Acer rubrum , Fagus grandifolia Quercus rubra Tsuga canadensis ) using information from 1,084 across eight sites northeastern United States. Effects varied, but were...
Abstract. How carbon (C) is allocated to different plant tissues (leaves, stem, and roots) determines how long C remains in biomass thus a central challenge for understanding the global cycle. We used diverse set of observations (AmeriFlux eddy covariance tower observations, estimates from tree-ring data, leaf area index (LAI) measurements) compare fluxes, pools, LAI data with those predicted by land surface model (LSM), Community Land Model (CLM4.5). ran CLM4.5 nine temperate (including...
Abstract Invasive annual grasses are a growing global concern because they facilitate larger and more frequent fires in historically fuel‐limited ecosystems. Forests of the western United States have remained relatively resistant to invasion by their subsequent impacts. However, where forests adjacent invaded areas, increased fire spread across ecotones could alter behavior ecosystem resilience. In Inland Northwest, USA, recent grass ventenata ( Ventenata dubia ) has fine fuel loads...
Abstract Background Wildfire is a major contemporary socio-ecological issue facing the people and natural resources of Southern California, prospect that warming climate could lead to higher probability fire in future cause for concern. However, connecting change projected burn complex. While most models generally show temperature increasing future, changes humidity precipitation are less certain, these interact generate projections climates sometimes, but not always, more conducive...
Summertime low clouds are common in the Pacific Northwest (PNW), but spatiotemporal patterns have not been characterized. We show first maps of cloudiness for western PNW and North Ocean using a 22-year satellite-derived record monthly mean frequency May through September supplemented by airport cloud base height observations. Domain-wide peaks midsummer is strongest over Pacific. Empirical orthogonal function (EOF) analysis identified four distinct modes: oceanic, terrestrial highlands,...
Coastal fog occurs along many of the world’s west coast continental environments. It is particularly consequential during summer when an increased frequency co-occurs with seasonal dryness characteristic most climate systems, for example, in Pacific North and South America, southwestern African coast, southern coastal Europe. Understanding formation effects has consequences disciplines, including physical (e.g., atmospheric science, oceanography), biological biogeography, ecophysiology),...
Abstract Bioacoustic methods play an increasingly important role for the detection of insects in a range surveillance and monitoring programmes. Weak‐flying evade because they do not yield sufficient audio information to capture wingbeat harmonic frequencies. These inaudible often pose significant threat food security as pests key agricultural crops worldwide. Automatic such is crucial future crop protection by providing critical assess risk need preventative measures. We describe...
In Southern California, the Santa Ana winds are famous for their role in spreading large wildfires during fall/winter season. Combined with California's complex topography, Anas create challenges modeling wind-fire relationships this region. Here, we assess heterogeneity of and non-Santa days, on days without large-fire ignitions, across a modern high-density observational network 30 meteorological stations. Wind speeds fire ignition (mean windspeed = 5.19 m/s) significantly higher than...
In 2023, 6,551 wildfires across Canada burned 184,961 km2 of the landscape—about 5% Canadian forests—emitting nearly 480 megatonnes carbon, with emissions leading to air quality warnings as far away Washington DC, USA. early June, index in New York City was over 400, and by mid-June, smoke plumes passed above Europe. As wildland fires increasing severity occur frequency, driven global climate change decades fire suppression, societies near from high-risk ecosystems face...