A5052005314- Atmospheric and Environmental Gas Dynamics
- Plant Water Relations and Carbon Dynamics
- Meteorological Phenomena and Simulations
- Atmospheric chemistry and aerosols
- Flexible and Reconfigurable Manufacturing Systems
- Climate variability and models
- Fluid Dynamics and Turbulent Flows
- Wind and Air Flow Studies
- Radiation Effects in Electronics
- Air Quality and Health Impacts
- Climate change and permafrost
- Vehicle emissions and performance
- Cryospheric studies and observations
- Air Quality Monitoring and Forecasting
- Integrated Circuits and Semiconductor Failure Analysis
- Methane Hydrates and Related Phenomena
- Nutrition, Genetics, and Disease
- Radiation Detection and Scintillator Technologies
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Public Administration and Political Analysis
- Ion-surface interactions and analysis
- Particle Detector Development and Performance
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
University of Wisconsin–Madison
2017-2025
BioVentures (United States)
2024-2025
Friedrich-Alexander-Universität Erlangen-Nürnberg
2020-2025
National Ecological Observatory Network
2015-2024
Battelle
2017-2024
University of Lucerne
2024
Swiss Paraplegic Center
2019-2024
Swiss Paraplegic Research
2016-2024
Battelle
2021-2023
Chinese Academy of Sciences
2011-2020
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 Viable nature-based climate solutions (NbCS) are needed to achieve goals expressed in international agreements like the Paris Accord. Many NbCS pathways have strong scientific foundations and can deliver meaningful benefits but effective mitigation is undermined by with less certainty. Here we couple an extensive literature review expert elicitation on 43 find that at present most used pathways, such as tropical forest conservation, a solid basis for mitigation. However, experts...
Abstract The eddy covariance is a powerful technique to estimate the surface-atmosphere exchange of different scalars at ecosystem scale. EC method central component Integrated Carbon Observation System, monitoring network for greenhouse gases across European Continent. data processing sequence applied collected raw complex, and multiple robust options steps are often available. For System similar networks, standardisation methods essential avoid methodological biases improve comparability...
Abstract. The goal of this study is to characterize the sensible (H) and latent (LE) heat exchange for different land covers in heterogeneous steppe landscape Xilin River catchment, Inner Mongolia, China. Eddy-covariance flux measurements at 50–100 m above ground were conducted July 2009 using a weight-shift microlight aircraft. Wavelet decomposition turbulence data enables spatial discretization 90 measurements. For total 8446 observations during 12 flights, MODIS surface temperature (LST)...
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...
Nature-based Climate Solutions (NbCS) are managed alterations to ecosystems designed increase carbon sequestration or reduce greenhouse gas emissions. While they have growing public and private support, the realizable benefits unintended consequences of NbCS not well understood. At regional scales where policy decisions often made, estimated from soil tree survey data that can miss important sources sinks within an ecosystem, do reveal biophysical impacts for local water energy cycles. The...
Abstract Methane (CH 4 ) is a potent greenhouse gas with warming potential 84 times that of carbon dioxide (CO 2 over 20‐year period. Atmospheric CH concentrations have been rising since the nineteenth century but cause large increases post‐2007 disputed. Tropical wetlands are thought to account for ∼20% global emissions, African tropical understudied and their contribution uncertain. In this work, we use first airborne measurements sampled three wetland areas in Zambia derive emission...
Abstract. Mapping in-situ eddy covariance measurements of terrestrial land-atmosphere fluxes to the globe is a key method for diagnosing Earth system from data-driven perspective. We describe first global products (called X-BASE) newly implemented up-scaling framework, FLUXCOM-X. The X-BASE comprise estimates CO2 net ecosystem exchange (NEE), gross primary productivity (GPP) as well evapotranspiration (ET) and, time, novel fully transpiration product (ETT), at high spatial (0.05°) and...
Abstract. Mapping in situ eddy covariance measurements of terrestrial land–atmosphere fluxes to the globe is a key method for diagnosing Earth system from data-driven perspective. We describe first global products (called X-BASE) newly implemented upscaling framework, FLUXCOM-X, representing an advancement previous generation FLUXCOM terms flexibility and technical capabilities. The X-BASE are comprised estimates CO2 net ecosystem exchange (NEE), gross primary productivity (GPP),...
Abstract. The objective of this study is to assess the feasibility and quality eddy-covariance flux measurements from a weight-shift microlight aircraft (WSMA). Firstly, we investigate precision wind measurement (σu,v ≤ 0.09 m s−1, σw = 0.04 s−1), lynchpin calculations aircraft. From here, smallest resolvable changes in friction velocity (0.02 sensible- (5 W m−2) latent (3 heat are estimated. Secondly, seven-day flight campaign was performed near Lindenberg (Germany). Here compare wind,...
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. Extreme hydrometeorological conditions typically impact ecophysiological processes on land. Satellite-based observations of the terrestrial biosphere provide an important reference for detecting and describing spatiotemporal development such events. However, in-depth investigations ecological during extreme events require additional in situ observations. The question is whether density existing networks sufficient analysing events, what are expected event detection rates a given...
Arctic permafrost caps vast amounts of old, geologic methane (CH4) in subsurface reservoirs. Thawing opens pathways for this CH4 to migrate the surface. However, occurrence emissions and their contribution budget addition recent, biogenic is uncertain. Here we present a high-resolution (100 m × 100 m) regional (10,000 km²) flux map Mackenzie Delta, Canada, based on airborne data from July 2012 2013. We identify strong, likely solely where discontinuous. These peaks are 13 times larger than...
Abstract. Direct measurements of NOx, CO and aromatic volatile organic compound (VOC) (benzene, toluene, C2-benzenes C3-benzenes) flux were made for a central area Beijing using the eddy-covariance technique. Measurements during two intensive field campaigns in as part Air Pollution Human Health (APHH) project, first November–December 2016 second May–June 2017, to contrast wintertime summertime emission rates. There was little difference magnitude NOx between seasons (mean 4.41 mg m−2 h−1...
Abstract The computation of turbulent fluxes heat, momentum, and greenhouse gases requires measurements taken at high sampling frequencies. An important step in this process involves the detection removal sudden, short-lived variations that do not represent physical processes contaminate data (i.e., spikes). objective study is to assess performance several noteworthy despiking methodologies order provide a benchmark assessment recommendation most applicable high-frequency micrometeorological...
Abstract Despite the importance of high-latitude surface energy budgets (SEBs) for land-climate interactions in rapidly changing Arctic, uncertainties their prediction persist. Here, we harmonize SEB observations across a network vegetated and glaciated sites at circumpolar scale (1994–2021). Our variance-partitioning analysis identifies vegetation type as an important predictor SEB-components during Arctic summer (June-August), compared to other SEB-drivers including climate, latitude...
Volatile organic compounds (VOCs) originate from a variety of sources, and play an intrinsic role in influencing air quality. Some VOCs, including benzene, are carcinogens so directly affect human health, while others, such as isoprene, very reactive the atmosphere important formation secondary pollutants ozone particles. Here we report spatially-resolved measurements surface-to-atmosphere fluxes VOCs across London SE England made 2013 2014. High-frequency 3-D wind velocities VOC volume...
To date, direct validation of city-wide emissions inventories for air pollutants has been difficult or impossible. However, recent technological innovations now allow measurement pollutant fluxes from cities, comparison with inventories, which are themselves commonly used prediction current and future quality to help guide abatement strategies. Fluxes NO<sub>x</sub>were measured using the eddy-covariance technique an aircraft flying at low altitude over London. The highest were observed...
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. Low-level flights over tundra wetlands in Alaska and Canada have been conducted during the Airborne Measurements of Methane Emissions (AirMeth) campaigns to measure turbulent methane fluxes atmosphere. In this paper we describe instrumentation new calibration procedures for essential pressure parameters required turbulence sensing by aircraft that exploit suitable regular measurement flight legs without need dedicated patterns. We estimate accuracy mean wind measurements. show...