A5039964575- Atmospheric and Environmental Gas Dynamics
- Plant Water Relations and Carbon Dynamics
- Meteorological Phenomena and Simulations
- Wind and Air Flow Studies
- Atmospheric chemistry and aerosols
- Climate variability and models
- Air Quality and Health Impacts
- Scientific Computing and Data Management
- Fluid Dynamics and Turbulent Flows
- Vehicle emissions and performance
- Ionosphere and magnetosphere dynamics
- Air Quality Monitoring and Forecasting
- Research Data Management Practices
- Distributed and Parallel Computing Systems
- Advanced Computational Techniques and Applications
- Atmospheric aerosols and clouds
- Remote Sensing in Agriculture
- Remote Sensing and LiDAR Applications
- Environmental Monitoring and Data Management
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Energy Load and Power Forecasting
- Flow Measurement and Analysis
- Geophysics and Gravity Measurements
- Fire effects on ecosystems
National Ecological Observatory Network
2014-2024
Battelle
2020-2023
Black Swift Technologies (United States)
2023
Battelle
2017-2022
Texas A&M University
2021
University of Wisconsin–Madison
2019
Laboratory for Atmospheric and Space Physics
2019
University of Michigan
2019
University of Georgia
2010-2015
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...
Abstract The Chequamegon Heterogeneous Ecosystem Energy-Balance Study Enabled by a High-Density Extensive Array of Detectors 2019 (CHEESEHEAD19) is an ongoing National Science Foundation project based on intensive field campaign that occurred from June to October 2019. purpose the study examine how atmospheric boundary layer (ABL) responds spatial heterogeneity in surface energy fluxes. One main objectives test whether lack balance closure measured eddy covariance (EC) towers related...
Abstract The National Ecological Observatory Network (NEON) is a multidecadal and continental-scale observatory with sites across the United States. Having entered its operational phase in 2018, NEON data products, software, services become available to facilitate research on impacts of climate change, land-use invasive species. An essential component are 47 tower sites, where eddy-covariance (EC) sensors operated determine surface–atmosphere exchange momentum, heat, water, CO 2 . EC...
Abstract. Large differences in instrumentation, site setup, data format, and operating system stymie the adoption of a universal computational environment for processing analyzing eddy-covariance (EC) data. This results limited software applicability extensibility addition to often substantial inconsistencies flux estimates. Addressing these concerns, this paper presents systematic development portable, reproducible, extensible EC achieved by adopting systems operation (DevOps) approach....
Abstract. Long-term tall-tower eddy-covariance (EC) measurements have been recently established in three European pilot cities as part of the ICOS-Cities project. We conducted a comparison EC software to ensure reliable generation interoperable flux estimates, which is prerequisite for avoiding methodological biases and improving comparability results. analyzed datasets covering 5 months collected from installations located urbanized areas Munich, Zurich, Paris. Fluxes sensible heat, latent...
Abstract. Continuous measurements of net ecosystem CO2 exchange (NEE) using the eddy-covariance method were made over an agricultural in southeastern US. During optimum environmental conditions, photosynthetically active radiation (PAR) was primary driver controlling daytime NEE, accounting for as much 67 to 89% variation NEE. However, soil water content became dominant factor limiting NEE-PAR response during peak growth stage. NEE significantly depressed when high PAR values coincided with...
The arboreal ecosystem is vitally important to global and local biogeochemical processes, the maintenance of biodiversity in natural systems, human health urban environments. ability collect samples, observations, data conduct meaningful scientific research similarly vital. primary methods modes access remain limited difficult. In an online survey, canopy researchers ( n = 219) reported a range challenges obtaining adequate including ∼10% who found it impossible procure what they needed....
Abstract. During March–June 2017 emissions of nitrogen oxides were measured via eddy covariance at the British Telecom Tower in central London, UK. Through use a footprint model expected simulated from spatially resolved National Atmospheric Emissions Inventory for and compared with emissions. These shown to underestimate during daytime by factor 1.48, but they agreed well overnight. Furthermore, underestimations mapped, areas around measurement site responsible differences inferred. It was...
Regional flux networks, including AmeriFlux, ICOS, NEON, and OzFlux, are now regularly generating updating FLUXNET data products for their sites. With that, availability is considerably expanded, with an increased number of sites addition recent site-years. Other improvements include continued extension variables metadata supported collected, deployment operationalization the jointly maintained ONEFlux pipeline, better integration network-level quality control processes, expansion adoption...
Core Ideas We present a semiautomated framework for large‐scale calibration of capacitance soil moisture sensors. Soil‐specific calibrations are needed accurate measurements in nearly all types. Transparent, traceable, and complete uncertainty estimates provided entire approach. Technological advances have allowed situ monitoring water content an automated manner. These advances, along with increase networks content, stress the need robust that ensures reliable. developed approach to make...
Abstract. Flux measurements of nitrogen oxides (NOx) were made over London using airborne eddy covariance from a low-flying aircraft. Seven low-altitude flights conducted Greater London, performing multiple overpasses across the city during eight days in July 2014. NOx fluxes region (GLR) exhibited high heterogeneity and strong diurnal variability, with central areas responsible for highest emission rates (20–30 mg m−2 h−1). Other high-emission included M25 orbital motorway. The complexity...
Single point eddy covariance measurements of the Earth’s surface energy budget frequently identify an imbalance between available and turbulent heat fluxes. While this lacks a definitive explanation, it is nevertheless persistent finding from single-site measurements; one with implications for atmospheric ecosystem models. This has led to push intensive field campaigns temporally spatially distributed sensors help causes balance non-closure. Here we present results Chequamegon Heterogeneous...
Abstract. The interpretation of flux measurements in nocturnal conditions is typically fraught with challenges. This paper reports on how the presence wave-like disturbances a time series, can lead to an overestimation turbulence statistics, errors when calculating stability parameter, erroneous estimation friction velocity u* used screen data, and turbulent calculations. Using series pressure signal from microbarograph, at AmeriFlux site are identified. removed during calculation statistics...
Abstract A quality management system is critical for ensuring that the data and services provided by an organization meet needs of its mission. With a mission to collect long‐term open‐access ecological better understand how US ecosystems are changing, National Ecological Observatory Network (NEON) highly standardized measurement network distributed across United States Puerto Rico collecting on biosphere interfaces with pedosphere, hydrosphere atmosphere. In order achieve high‐quality,...
Abstract. The observing system design of multidisciplinary field measurements involves a variety considerations on logistics, safety, and science objectives. Typically, this is done based investigator intuition designs prior measurements. However, there potential for considerable increases in efficiency, scientific success by integrating numerical simulations the process. Here, we present novel simulation–environmental response function (NS–ERF) approach to simulation experiments that aids...
Abstract. Global change research demands a convergence among academic disciplines to understand complex changes in Earth system function. Limitations related data usability and computing infrastructure, however, present barriers effective use of the tools needed for this cross-disciplinary collaboration. To address these barriers, we created computational platform that pairs meteorological site-level ecosystem characterizations from National Ecological Observatory Network (NEON) with...
Abstract The highly interactive and variable nature of scales space time featured in components the Earth system imparts enormous complexity to land‐atmosphere interactions. Here, we introduce an open special collection on Advances Scaling Modeling Land ‐ Atmosphere Interactions that features articles JGR : Biogeosciences , Atmospheres Journal Systems & Space Science . Collectively, these identify interactions across multiple processes, field experiments, long‐term observations,...
Abstract. Long-term tall-tower eddy-covariance (EC) measurements have been recently established in three European pilot cities as part of the ICOS-Cities project. We conducted a comparison EC software to ensure reliable generation interoperable flux estimates, which is prerequisite for avoiding methodological biases and improving comparability results. analyzed datasets covering five months collected from installations located urbanized areas Munich, Zurich, Paris. Fluxes sensible heat,...
Abstract. Sodar (SOund Detection And Ranging), eddy-covariance, and tower profile measurements of wind speed carbon dioxide were performed during 17 consecutive nights in complex terrain northern Taiwan. The scope the study was to identify causes for intermittent turbulence events analyze their importance nocturnal atmosphere–biosphere exchange as quantified with eddy-covariance measurements. If intermittency occurs frequently at a measurement site, then this process needs be order achieve...
Abstract The Earth's surface is heterogeneous at multiple scales owing to spatial variability in various properties. atmospheric responses these heterogeneities through fluxes of energy, water, carbon, and other scalars are scale‐dependent nonlinear. Although exchanges can be measured using the eddy covariance technique, widely used tower‐based measurement approaches suffer from spectral losses lower frequencies when typical averaging times. However, spatially resolved measurements such as...