A5001016083- Plant Water Relations and Carbon Dynamics
- Atmospheric and Environmental Gas Dynamics
- Advanced Data Storage Technologies
- Aeolian processes and effects
- Parallel Computing and Optimization Techniques
- Soil Moisture and Remote Sensing
- Remote Sensing in Agriculture
- Distributed and Parallel Computing Systems
- Meteorological Phenomena and Simulations
- Soil and Unsaturated Flow
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Precipitation Measurement and Analysis
- Soil Carbon and Nitrogen Dynamics
- Rangeland and Wildlife Management
- Wind and Air Flow Studies
- Fire effects on ecosystems
- Solar Radiation and Photovoltaics
- Tree Root and Stability Studies
- Hydrology and Sediment Transport Processes
- Energy Load and Power Forecasting
- Climate variability and models
- Geothermal Energy Systems and Applications
- Environmental Impact and Sustainability
- Greenhouse Technology and Climate Control
- Infrastructure Resilience and Vulnerability Analysis
Washington State University
2010-2024
Agricultural Research Service
2010-2021
Southwest Watershed Research Center
2021
Washington State University Spokane
2020
Sandia National Laboratories
2001-2011
Iowa State University
2010-2011
National Technical Information Service
2011
Systems Research Institute
2011
Office of Scientific and Technical Information
2011
Sandia National Laboratories California
2003-2006
Large datasets of greenhouse gas and energy surface-atmosphere fluxes measured with the eddy-covariance technique (e.g., FLUXNET2015, AmeriFlux BASE) are widely used to benchmark models remote-sensing products. This study addresses one major challenges facing model-data integration: To what spatial extent do flux measurements taken at individual sites reflect model- or satellite-based grid cells? We evaluate footprints—the temporally dynamic source areas that contribute fluxes—and...
The ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) was launched to the International 29 June 2018 by National Aeronautics and Administration (NASA). primary science focus of ECOSTRESS is centered evapotranspiration (ET), which produced as Level-3 (L3) latent heat flux (LE) data products. These are generated from Level-2 land surface temperature emissivity product (L2_LSTE), in conjunction with ancillary atmospheric data. Here, we provide first validation...
Abstract There are no direct methods to evaluate calculated soil heat flux (SHF) at the surface ( G 0 ). Instead, validation and cross evaluation of for calculating usually rely on conventional calorimetric method or degree energy balance closure. However, there is uncertainty in itself, factors apart from also contribute nonclosure balance. Here we used a novel approach nine different SHF, including based analytical solutions diffusion equation. The SHF z ) measured by self‐calibrating...
Abstract The effects of large eddies on turbulence structures and flux transport were studied using data collected over a flat cotton field during the Energy Balance Experiment 2000 in San Joaquin Valley California August 2000. Flux convergence (FC; larger fluxes at 8.7 m than 2.7 m) divergence (FD) latent heat (LE) observed disturbed, unstable atmospheric surface layer, their magnitudes largely departed from prediction Monin‐Obukhov similarity theory. From our wavelet analysis, it was...
Effective measurement of seasonal variations in the timing and amount production is critical to managing spatially heterogeneous agroecosystems a changing climate. Although numerous technologies for such measurements are available, their relationships one another at continental extent unknown. Using data collected from across Long-Term Agroecosystem Research (LTAR) network other networks, we investigated correlations among key metrics representing primary production, phenology, carbon fluxes...
Parallel file subsystems in today's high-performance computers adopt many I/O optimization strategies that were designed for distributed systems. These strategies, instance client-side caching, treat each request process independently, due to the consideration clients are unlikely related with other a environment. However, it is inadequate apply such directly where most of requests come from processes work on same parallel applications. We believe caching could perform more effectively if...
Accurately quantifying surface energy budgets in croplands is essential for efficient water resource allocation and sustainable agricultural practices. However, the representativeness of eddy covariance (EC) measurements hilly fields remains less examined. In this study, we conducted an experiment employing three EC flux towers to assess consistency budget components across a field (~90 acres). The experimental was divided into zones, each equipped with tower positioned at its central...
Abstract The first phase of an atmospheric tracer experiment program, designated Project Sagebrush, was conducted at the Idaho National Laboratory in October 2013. purpose to reevaluate results classical field experiments short-range plume dispersion (e.g., Prairie Grass) using newer technologies that are available for measuring both turbulence levels and concentrations. All releases were during daytime with conditions ranging from neutral unstable. key finding values horizontal spread...
With the addition of nitrogen (N), agricultural soils are main anthropogenic source N2O, but high spatial and temporal variabilities make N2O emissions difficult to characterize at field scale. This study used flux-gradient measurements continuously monitor two fields under different management regimes in inland Pacific Northwest Washington State, USA. Automated 16-chamber arrays were also deployed each site; chamber monitoring results aided interpretation flux gradient results. The...
Understanding the carbon fluxes and dynamics from a broad range of agricultural systems has potential to improve our ability increase sequestration while maintaining crop yields. Short-term, single-location studies have limited applicability, but long-term data network many locations can provide broader understanding across gradients climate management choices. Here we examine eddy covariance measured dioxide (CO2) cropland sites United States Department Agriculture's Long-Term Agroecosystem...
Abstract The daytime and nighttime turbulence profiles within a weak‐wind forest canopy were investigated by using data collected temperate mixed conifer in northern Idaho, USA. Turbulence measurements made at three heights on single tower Douglas fir compared. Data split between the to determine relationships among local temperature gradient, wind direction, speed, levels. total flow field distributions vertical statistical determined for overnight periods observe how overall changed with...
Abstract Cropland is an important land cover influencing global carbon and water cycles. Variability of agricultural fluxes depends on crop species, management practices, soil characteristics, climatic conditions. In the context climate change, it critical to quantify long‐term effects these environmental drivers farming activities dynamics. Twenty site‐years covering a large precipitation gradient variety species practices were measured in inland Pacific Northwest using eddy covariance...
ABSTRACT In this study, we obtain the size distribution of voids as a three-parameter redshift-independent log-normal void probability function (VPF) directly from Cosmic Void Catalog (CVC). Although many statistical models distributions are based on counts in randomly placed cells, VPF that here is independent shape due to parameter-free finder CVC. We use three populations drawn CVC generated by Halo Occupation Distribution (HOD) Mocks, which tuned mock SDSS samples investigate...
Summary form only given. In order for I/O systems to achieve high performance in a parallel environment, they must either sacrifice client-side file caching, or keep caching and deal with complex coherency issues. The most common technique dealing cache multiclient environments uses locks bypass the cache. Aside from effectively disabling usage, locking is sometimes unavailable on larger systems. high-level abstraction layer of MPI allows us tackle additional information coordination without...
We investigate the Message Passing Interface Input/Output (MPI I/O) implementation issues for two overlapping access patterns: overlaps among processes within a single I/O operation and across sequence of operations. The former case considers whether atomicity can be obtained in regions. latter focuses on file consistency problem parallel machines with client-side caching enabled. Traditional solutions both problems use whole or byte-range locking to ensure exclusive regions bypass system...
Abstract A field study was conducted of flows in the Birch Creek Valley eastern Idaho. There is a distinct topographic constriction that creates two subbasins: an upper and lower valley. The data were classified into one three groups based on synoptic influence (weak/absent, high wind speeds, other evidence influence). Gap commonly developed downwind association with weak/absent group but also occurred suggesting potential for more diverse origins. In general, frequency strength gap appeared...
This study evaluated evapotranspiration (ET) estimated using the Earth Engine Evapotranspiration Flux (EEFlux), an automated version of widely used Mapping at High Spatial Resolution with Internalized Calibration (METRIC) model, via comparison ET measured eddy covariance flux towers two U.S. sites (St. John, WA, USA and Genesee, ID, USA) for years (2018 2019). Crops included spring wheat, winter pea, all grown under rainfed conditions. The performance indices daily EEFlux estimations...
NASA's Soil Moisture Active Passive satellite mission will use both an L-band radiometer and radar to produce global-scale measurements of soil moisture. backscatter is also sensitive the water content vegetation. We found that a moderate dew increased soybean canopy by 1 dB. Dew thus has potential add error observations