A5113709518- Soil Carbon and Nitrogen Dynamics
- Climate change and permafrost
- Interactive and Immersive Displays
- Advanced Malware Detection Techniques
- Soil Geostatistics and Mapping
- Network Security and Intrusion Detection
- Peatlands and Wetlands Ecology
- Bioenergy crop production and management
- Cryospheric studies and observations
- Atmospheric and Environmental Gas Dynamics
- Soil and Water Nutrient Dynamics
- Spam and Phishing Detection
- Geology and Paleoclimatology Research
- Biofuel production and bioconversion
- Advanced Data Storage Technologies
- Augmented Reality Applications
- Big Data and Business Intelligence
- Web Data Mining and Analysis
- Soil and Unsaturated Flow
- Usability and User Interface Design
- BIM and Construction Integration
- Geological Studies and Exploration
- Information Technology Governance and Strategy
- Blockchain Technology Applications and Security
- Manufacturing Process and Optimization
Sandia National Laboratories California
2020-2025
Joint BioEnergy Institute
2020-2025
Lawrence Berkeley National Laboratory
2010-2025
Sandia National Laboratories
2021-2025
Vellore Institute of Technology University
2020-2024
Argonne National Laboratory
2012-2021
Oak Ridge National Laboratory
2021
Los Alamos National Laboratory
2021
Office of Science
2016
University of California, Berkeley
2010-2011
Abstract. Soils and other unconsolidated deposits in the northern circumpolar permafrost region store large amounts of soil organic carbon (SOC). This SOC is potentially vulnerable to remobilization following warming thaw, but stock estimates were poorly constrained quantitative error lacking. study presents revised stocks, including uncertainty estimates, 0–3 m depth range soils as well for sediments deeper than 3 deltaic major rivers Yedoma Siberia Alaska. Revised are based on...
Abstract Soil, through its various functions, plays a vital role in the Earth's ecosystems and provides multiple ecosystem services to humanity. Pedotransfer functions (PTFs) are simple complex knowledge rules that relate available soil information properties variables needed parameterize processes. In this paper, we review existing PTFs document new generation of developed different disciplines Earth system science. To meet methodological challenges for successful application modeling,...
Heterogeneous environmental controls on permafrost region soil organic carbon stocks can now be quantified with spatial modeling.
Abstract. High-latitude terrestrial ecosystems are key components in the global carbon cycle. The Northern Circumpolar Soil Carbon Database (NCSCD) was developed to quantify stocks of soil organic (SOC) northern circumpolar permafrost region (a total area 18.7 × 106 km2). NCSCD is a geographical information system (GIS) data set that has been constructed using harmonized regional classification maps together with pedon from region. Previously, used calculate SOC storage reference depths 0–30...
Estimates of soil organic C (SOC) storage and their variability at various spatial scales are essential to better understand the global cycle, estimate sink capacity, identify effective sequestration strategies, quantify amount SOC sequestered during a specific period time. This study used geographically weighted regression (GWR) approach predict pool regional scale. The GWR considers varying relationships between environmental variables across area. range variogram observations was define...
The objective of this study was to predict and map SOC stocks at different depth intervals within the upper 1‐m using profile distribution functions ordinary kriging. These approaches were tested for state Indiana as a case study. A total 464 pedons representing 204 soil series obtained from National Soil Survey Center database. Another 48 samples collected better represent heterogeneity environmental variables. Two methods used model negative exponential functions. In Procedure A, describe...
Biofuels are widely touted as viable, albeit not straightforward, alternatives to petroleum-derived fuels. To best determine their utilization, many practitioners turn life-cycle assessment (LCA) ascertain the "environmental footprint". Although parameters such resource and land use, along with infrastructure, can be incorporated into LCA algorithms, have noted that methodological approach still needs careful attention. In this Feature, McKone et al. outline seven grand challenges need...
No‐till (NT) agriculture has been promoted as one of the optimal management practices that preserves soil and water, increases organic C (SOC) compared with conventional tillage (CT) practices. Information on SOC sequestration in NT systems, however, based measurements from surface (<30 cm) little is known about extent across entire 0‐ to 60‐cm profile. We conducted a regional study farming assess whole profile 12 contrasting but representative soils Midwestern United States, each within...
Afforestation (tree establishment on nonforested land) is a management option for increasing terrestrial C sequestration and mitigating rising atmospheric carbon dioxide because, compared to land uses, afforestation increases storage in aboveground pools. However, because ecosystems typically store most of their soils, impacts soil organic (SOC) are critical components ecosystem budgets. We applied synthesis methods identify the magnitude drivers SOC, temporal vertical distributions SOC...
Soils are Earth's largest terrestrial carbon (C) pool, and their responsiveness to land use management make them appealing targets for strategies enhance C sequestration. Numerous studies have identified practices that increase soil C, but inferences often based on limited data extrapolated over large areas. Here, we combine 15,000 observations from two national-level databases with remote sensing information address the impacts of reforestation sequestration in topsoils (uppermost mineral...
Abstract A reanalysis is a physically consistent set of optimally merged simulated model states and historical observational data, using data assimilation. High computational costs for modeled processes assimilation algorithms has led to Earth system specific products the atmosphere, ocean land separately. Recent developments include advanced uncertainty quantification generation biogeochemical ocean. Here, we review atmospheric oceanic reanalyzes, more in detail terrestrial reanalyzes. In...
Abstract. The direction and magnitude of soil organic carbon (SOC) changes in response to climate change depend on the spatial vertical distributions SOC. We estimated spatially resolved SOC stocks from surface C horizon, distinguishing active-layer permafrost-layer stocks, based geospatial analysis 472 profiles referenced environmental variables for Alaska. Total Alaska state-wide stock was be 77 Pg, with 61% active-layer, 27% permafrost, 12% non-permafrost soils. Prediction accuracy...
Abstract. An important feature of the Arctic is large spatial heterogeneity in active layer conditions, which generally poorly represented by global models and can lead to uncertainties predicting regional ecosystem responses climate feedbacks. In this study, we developed a spatially integrated modeling analysis framework combining field observations, local-scale ( ∼ 50 m resolution) thickness (ALT) soil moisture maps derived from low-frequency (L + P-band) airborne radar measurements,...
Spatial heterogeneity in environmental factors on the land surface moderates exchanges of water, energy, and greenhouse gases between atmosphere. However, appropriately representing this earth system models remains a critical scientific challenge. We used large dataset (n = 31) soil-forming factors, field observations soil organic carbon (SOC) 6213), machine-learning algorithm (Cubist) to analyze scaling behavior SOC across conterminous United States. found that various are significant...