A5041708155- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Plant Water Relations and Carbon Dynamics
- Atmospheric Ozone and Climate
- Plant responses to elevated CO2
- Odor and Emission Control Technologies
- Climate variability and models
- Fire effects on ecosystems
- Air Quality Monitoring and Forecasting
- Meteorological Phenomena and Simulations
- Soil Carbon and Nitrogen Dynamics
- Spectroscopy and Laser Applications
- Peatlands and Wetlands Ecology
- Marine and environmental studies
- Carbon Dioxide Capture Technologies
- Water Quality Monitoring and Analysis
- Cryospheric studies and observations
- Remote Sensing in Agriculture
- Earth Systems and Cosmic Evolution
- Aquatic and Environmental Studies
- Spectroscopy and Chemometric Analyses
- thermodynamics and calorimetric analyses
- Science and Climate Studies
- Hydrology and Drought Analysis
- Calibration and Measurement Techniques
Wageningen University & Research
2016-2024
University of Groningen
2016-2024
Nanjing University
2023
Abstract. For the past decade, observations of carbonyl sulfide (OCS or COS) have been investigated as a proxy for carbon uptake by plants. OCS is destroyed enzymes that interact with CO2 during photosynthesis, namely carbonic anhydrase (CA) and RuBisCO, where CA more important one. The majority sources to atmosphere are geographically separated from this large plant sink, whereas sinks co-located in ecosystems. drawdown can therefore be related without added complication emissions...
Understanding climate controls on gross primary productivity (GPP) is crucial for accurate projections of the future land carbon cycle. Major uncertainties exist due to challenge in separating GPP and respiration from observations dioxide (CO 2 ) flux. Carbonyl sulfide (COS) has a dominant vegetative sink, plant COS uptake used infer through leaf relative (LRU) ratio CO fluxes. However, little known about variations LRU under changing environmental conditions different phenological stages....
We analysed gross primary productivity (GPP), total ecosystem respiration (TER) and the resulting net exchange (NEE) of carbon dioxide (CO 2 ) by terrestrial biosphere during summer 2018 through observed changes across Integrated Carbon Observation System (ICOS) network, inverse modelling, remote sensing. Highly correlated yet independently-derived reductions in from sun-induced fluorescence, vegetative near-infrared reflectance, GPP simulated Simple Biosphere model version 4 (SiB4) suggest...
Abstract. The uptake of carbonyl sulfide (COS) by terrestrial plants is linked to photosynthetic CO2 as these gases partly share the same pathway. Applying COS a photosynthesis tracer in models requires an accurate representation biosphere fluxes, but have not been extensively evaluated against field observations fluxes. In this paper, flux simulated Simple Biosphere Model, version 4 (SiB4), updated with latest mechanistic insights and site from different biomes: one evergreen needleleaf...
Abstract. Carbonyl sulfide (COS) has the potential to be used as a climate diagnostic due its close coupling biospheric uptake of CO2 and role in formation stratospheric aerosol. The current understanding COS budget, however, lacks sources, which have previously been allocated tropical ocean. This paper presents first attempt at global inverse modelling within 4-dimensional variational data-assimilation system TM5 chemistry transport model (TM5-4DVAR) comparison results with various...
Abstract. Land surface modellers need measurable proxies to constrain the quantity of carbon dioxide (CO2) assimilated by continental plants through photosynthesis, known as gross primary production (GPP). Carbonyl sulfide (COS), which is taken up leaves their stomates and then hydrolysed photosynthetic enzymes, a candidate GPP proxy. A former study with ORCHIDEE land model used fixed ratio COS uptake CO2 normalised respective ambient concentrations for each vegetation type (leaf relative...
Abstract. Soil is a major contributor to the biosphere–atmosphere exchange of carbonyl sulfide (COS) and carbon monoxide (CO). COS tracer with which quantify terrestrial photosynthesis based on coupled leaf uptake CO2, but such use requires separating soil flux, unrelated photosynthesis, from ecosystem uptake. For CO, significant natural sink that influences tropospheric CO budget. In boreal forest, magnitudes variabilities fluxes remain poorly understood. We measured hourly COS, CO2 over...
Abstract. For the past decade, observations of carbonyl sulfide (OCS or COS) have been investigated as a proxy for carbon uptake by plants. OCS is destroyed enzymes that interact with CO2 during photosynthesis, namely carbonic anhydrase (CA) and RuBisCO, where CA more important. The majority sources to atmosphere are geographically separated from this large plant sink, whereas sinks co-located in ecosystems. drawdown can therefore be related without added complication emissions comparable...
Abstract. The seasonality and interannual variability of terrestrial carbonyl sulfide (COS) fluxes are poorly constrained. We present the first easy-to-use parameterization for net COS forest sink based on longest existing eddy covariance record from a boreal pine forest, covering 32 months over 5 years. Fluxes hourly to yearly scales reported, with aim revealing controlling factors level variability. is photosynthetically active radiation, vapor pressure deficit, air temperature, leaf area...
Abstract We present a comparison of atmospheric transport model (ATM) simulations for carbonyl sulfide (COS), within the framework tracer intercomparison project “TransCom‐COS.” Seven ATMs participated in experiment and provided COS mixing ratios over years 2010–2018, using state‐of‐the‐art surface fluxes various components budget: biospheric sink, oceanic source, sources from fire industry. The main goal TransCom‐COS is to investigate impact uncertainty emission distribution simulating...
Abstract. Carbonyl sulfide (COS) has been proposed as a proxy for gross primary production (GPP), it is taken up by plants through comparable pathway CO2. COS diffuses into the leaf and undergoes an essentially one-way reaction in mesophyll cells, catalyzed enzyme carbonic anhydrase (CA), does not exit again. In order to use GPP, however, mechanisms of uptake its coupling CO2 need be well understood. Characterizing isotopic discrimination during plant can provide useful information on...
Abstract. Nighttime vegetative uptake of carbonyl sulfide (COS) can exist due to the incomplete closure stomata and light independence enzyme carbonic anhydrase, which complicates use COS as a tracer for gross primary productivity (GPP). In this study we derived nighttime fluxes in boreal forest (the SMEAR II station Hyytiälä, Finland; 61°51′ N, 24°17′ E; 181 m a.s.l.) from June November 2015 using two different methods: eddy-covariance (EC) measurements (FCOS-EC) radon-tracer method...
Abstract. Carbonyl sulfide (COS) has been suggested as a useful tracer for gross primary production it is taken up by plants in similar way CO2. To explore and verify the application of this novel tracer, highly desired to develop ability perform continuous high-precision situ atmospheric measurements COS In study we have tested quantum cascade laser spectrometer (QCLS) its suitability obtain accurate The instrument capable simultaneously measuring COS, CO2, CO H2O after including weak...
Abstract. Carbonyl sulfide (COS) has the potential to be used as a climate diagnostic due its close coupling biospheric uptake of CO2 and role in formation stratospheric aerosol. The current understanding COS budget, however, lacks sources, which have previously been allocated tropical ocean. This paper presents first attempt global inverse modelling within 4-Dimensional variational data-assimilation system TM5 chemistry transport model (TM5-4DVAR) comparison results with independent...
Abstract. Separating the components of ecosystem-scale carbon exchange is crucial in order to develop better models and future predictions terrestrial cycle. However, there are several uncertainties unknowns related current photosynthesis estimates. In this study, we evaluate four different methods for estimating at a boreal forest ecosystem scale, which two based on dioxide (CO2) flux measurements carbonyl sulfide (COS) measurements. The CO2-based use traditional partitioning artificial...
In the literature, no consensus can be found on exact form of universal funtions Monin-Obukhov similarity theory (MOST) for structure parameters temperature, $${C_T}^2$$ , and humidity, $${C_q}^2$$ dissipation rate turbulent kinetic energy, $$\varepsilon $$ . By combining 11 datasets applying data treatment with spectral filtering error-weighted curve-fitting we first derived robust MOST functions $${C_T}^2, {C_q}^2$$ that cover a large stability range both unstable stable conditions....
Abstract. Carbonyl sulfide (COS) flux measurements with the eddy covariance (EC) technique are becoming popular for estimating gross primary productivity. To compare COS across sites, we need standardized protocols data processing. In this study, analyze how various processing steps affect calculated and they differ from carbon dioxide (CO2) steps, provide a method gap-filling fluxes. Different methods determining time lag between mixing ratio vertical wind velocity (w) resulted in maximum...
Abstract. Carbonyl sulfide (COS) is a useful tracer to estimate gross primary production (GPP) because it shares part of the uptake pathway with CO2. COS taken up in plants through hydrolysis, catalyzed by enzyme carbonic anhydrase (CA), but not released. The Simple Biosphere model version 4 (SiB4) simulates leaf using conductance approach. SiB4 applies temperature response RuBisCo (used for photosynthesis) simulate uptake, CA might respond differently temperature. We introduce new function...
Abstract. We present the CarbonTracker Europe High-Resolution (CTE-HR) system that estimates carbon dioxide (CO2) exchange over at high resolution (0.1 × 0.2∘) and in near real time (about 2 months' latency). It includes a dynamic anthropogenic emission model, which uses easily available statistics on economic activity, energy use, weather to generate emissions with profiles spatial temporal (0.1×0.2∘, hourly). Hourly net ecosystem productivity (NEP) calculated by Simple Biosphere model...
Abstract. Carbonyl sulfide (COS), a trace gas in our atmosphere that leads to the formation of aerosols stratosphere, is largely taken up by terrestrial ecosystems. Quantifying biosphere uptake COS could provide useful quantity estimate gross primary productivity (GPP). Some sources and sinks still contain large uncertainties, several top-down estimates budget point an underestimation sources, especially tropics. We extended inverse model TM5-4DVAR assimilate Michelson Interferometer for...
Boreal forests absorb a significant amount of atmospheric CO2 through gross primary production (GPP), representing about 20% the global GPP. However, direct observations GPP over whole boreal region are not available as plant photosynthetic rate cannot be measured at scales larger than leaf scale. At large scales, Land Surface Models (LSMs) can simulate but lack measurements makes it challenging to evaluate and improve representation in LSMs. In addition, highly sensitive environmental...
Abstract. Nighttime vegetative uptake of carbonyl sulfide (COS) can exist due to the incomplete closure stomata and light-independence enzyme carbonic anhydrase, which complicates use COS as a tracer for gross primary productivity (GPP). In this study we derived nighttime fluxes in boreal forest (the SMEAR II station Hyytiälä, Finland; 61°51′ N, 24°17′ E, 181 m ASL) from June November 2015 using two different methods: eddy-covariance (EC) measurements (FCOS-EC) radon-tracer method (FCOS-Rn)....
Abstract. Carbonyl sulfide (COS) flux measurements with the eddy covariance (EC) technique are growing in popularity recent development using COS to estimate gross photosynthesis at ecosystem scale. Flux data intercomparison would benefit from standardized protocols for processing. In this study, we analyze how various processing steps affect final and provide a method gap-filling fluxes. Different methods determining lag time between mixing ratio vertical wind velocity (w) resulted maximum...
Abstract. Carbonyl sulfide (COS) is a promising tracer for the estimation of terrestrial ecosystem gross primary production (GPP). However, understanding its non-GPP-related sources and sinks, e.g., anthropogenic soil also critical to success approach. Here we infer regional sinks COS using continuous in situ mole fraction profile measurements along 60 m tall Lutjewad tower (1 a.s.l.; 53∘24′ N, 6∘21′ E) Netherlands. To identify potential that caused observed enhancements fractions at...