A5021566327- Plant Water Relations and Carbon Dynamics
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Fire effects on ecosystems
- Atmospheric Ozone and Climate
- Rangeland Management and Livestock Ecology
- Cryospheric studies and observations
- Hydrology and Watershed Management Studies
- Atmospheric chemistry and aerosols
- Methane Hydrates and Related Phenomena
- Climate change and permafrost
- Tree-ring climate responses
- Peatlands and Wetlands Ecology
- Remote Sensing in Agriculture
- Remote Sensing and LiDAR Applications
- Radiation Therapy and Dosimetry
- Marine and coastal ecosystems
- Rangeland and Wildlife Management
- Geophysics and Gravity Measurements
- Land Use and Ecosystem Services
- Plant responses to elevated CO2
- Ecology and Vegetation Dynamics Studies
- Meteorological Phenomena and Simulations
- Radioactive Decay and Measurement Techniques
- Plant Ecology and Soil Science
Lund University
2014-2024
Skåne University Hospital
2021
Getinge (Sweden)
2021
Google (United States)
2020
University of Bayreuth
2011-2015
Abstract. Freshwaters bring a notable contribution to the global carbon budget by emitting both dioxide (CO2) and methane (CH4) atmosphere. Global estimates of freshwater emissions traditionally use wind-speed-based gas transfer velocity, kCC (introduced Cole Caraco, 1998), for calculating diffusive flux with boundary layer method (BLM). We compared CH4 CO2 fluxes from BLM two other velocities (kTE kHE), which include effects water-side cooling besides shear-induced turbulence, simultaneous...
The Nordic region was subjected to severe drought in 2018 with a particularly long-lasting and large soil water deficit Denmark, Southern Sweden Estonia. Here, we analyse the impact of on carbon fluxes 11 forest ecosystems different composition: spruce, pine, mixed deciduous. We assess by estimating difference (anomaly) between year reference without drought. Unexpectedly, evaporation only slightly reduced during compared at two sites while it increased or nearly unchanged all other sites....
Risk assessment of pesticide impacts on remote ecosystems makes use model-estimated degradation in air. Recent studies suggest these rates to be overestimated, questioning current regulation. Here, we investigated the concentrations 76 pesticides Europe at 29 rural, coastal, mountain, and polar sites during agricultural application season. Overall, 58 were observed European atmosphere. Low spatial variation 7 suggests continental-scale atmospheric dispersal. Based free tropospheric air...
Abstract. To investigate the energy, matter and reactive non-reactive trace gas exchange between atmosphere a spruce forest in German mountain region, two intensive measuring periods were conducted at FLUXNET site DE-Bay (Waldstein-Weidenbrunnen) September/October 2007 June/July 2008. They part of project "ExchanGE processes mountainous Regions" (EGER). Beyond brief description experiment, main focus paper concerns coupling trunk space, canopy above-canopy atmosphere. Therefore, relevant...
Abstract. The Tibetan Plateau has a significant role with regard to atmospheric circulation and the monsoon in particular. Changes between closed plant cover open bare soil are one of striking effects land use degradation observed unsustainable range management or climate change, but experiments investigating changes surface properties processes together feedbacks rare have not been undertaken world's two largest alpine ecosystems, steppe Kobresia pygmaea pastures Plateau. We connected...
The Tibetan Plateau plays an important role in the global water cycle and is strongly influenced by climate change. While energy matter fluxes have been more intensely studied over land surfaces, a large proportion of lakes either neglected or parameterised with simple bulk approaches. Therefore, turbulent were measured wet grassland shallow lake single eddy-covariance complex at shoreline Nam Co basin summer 2009. Footprint analysis was used to split observations according underlying...
Abstract. The Integrated Carbon Observation System (ICOS) is a pan-European research infrastructure which provides harmonized and high-precision scientific data on the carbon cycle greenhouse gas budget. All stations have to undergo rigorous assessment before being labeled, i.e., receiving approval join network. In this paper, we present labeling process for ICOS atmosphere network through 23 that were labeled between November 2017 2019. We describe steps, as well quality controls, used...
Agriculture is one of the major sources global greenhouse gas emissions, and faces challenges such as erosion, nutrient leakage, reliance on external inputs like seeds fertilizers. These issues are largely driven by cultivation annual crops with shallow roots intensive soil disturbance. Perennial crops, intermediate wheatgrass (IWG), could offer a sustainable alternative reducing input dependency through deep extensive no-till requirements. This study focuses IWG, producing grain Kernza,...
Leaf area index (LAI) is a key ecological indicator for describing the structure of canopies and modelling energy exchange between atmosphere biosphere. While LAI forest overstory can be accurately assessed over large spatial scales via remote sensing, understory (LAIu) still largely ignored in studies ecosystem due to fact that it often too complex destructively sampled or approximated by other site parameters. Additionally, so far only few attempts have been made retrieve because dense...
Abstract. Information about forest background reflectance is needed for accurate biophysical parameter retrieval from canopies (overstory) with remote sensing. Separating under- and overstory signals would enable more modeling of carbon energy fluxes. We retrieved values the normalized difference vegetation index (NDVI) understory multi-angular Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional distribution function (BRDF)/albedo data (gridded 500 m daily Collection 6...
Abstract. We present a novel high-resolution inverse modelling system (“FLEXVAR”) based on FLEXPART-COSMO back trajectories driven by COSMO meteorological fields at 7 km×7 km resolution over the European COSMO-7 domain and four-dimensional variational (4DVAR) data assimilation technique. FLEXVAR is coupled offline with global TM5-4DVAR to provide background mole fractions (“baselines”) consistent observations assimilated in TM5-4DVAR. have applied for of CH4 emissions 2018 using 24 stations...
Abstract. This paper introduces a surface model with two soil-layers for use in high-resolution circulation that has been modified an extrapolated temperature, to be used the calculation of turbulent fluxes. A quadratic temperature profile based on layer mean and base is assumed each extended surface. The tested at sites Tibetan Plateau near Nam Co Lake during four days 2009 Monsoon season. In comparison two-layer without explicit estimate, there greatly reduced delay diurnal flux cycles...
Abstract. The Tibetan Plateau has a significant role with regard to atmospheric circulation and the monsoon in particular. Changes between closed plant cover open bare soil are one of striking effects land use degradation observed unsustainable range management or climate change, but experiments coupling changes surface properties processes feedbacks rare have not been undertaken world's two largest alpine ecosystems, steppe Kobresia pygmaea pastures plateau. We coupled measurements...
Abstract. Freshwaters bring a notable contribution to the global carbon budget by emitting both dioxide (CO2) and methane (CH4) atmosphere. Global estimates of freshwater emissions traditionally use wind speed based gas transfer coefficient, kCC, for calculating diffusive flux with boundary layer method (BLM). We compared CH4 CO2 fluxes from BLM kCC two other coefficients (kTE kHE), that include effects water-side cooling besides shear-induced turbulence, simultaneous eddy covariance (EC)...
Abstract Kobresia pastures in the eastern Tibetan highlands occupy 450000 km 2 and form world’s largest pastoral alpine ecosystem. The main constituent is an endemic dwarf sedge, pygmaea , which forms a lawn with durable turf cover anchored by felty root mat, occurs from 3000 m to nearly 6000 a.s.l. existence functioning of this unique ecosystem its have not yet been explained against backdrop natural anthropogenic factors, thus origin, drivers, vulnerability or resilience remain largely...
Abstract. An inverse study of atmospheric methane (CH4) estimated regional and sectoral emission contributions to the unprecedented surge growth rate for 2020–2022. Three analyses, which used only surface observations, aircraft satellite (GOSAT) consistently suggested notable increases in tropics (15° S–10° N) (10–18 Tg CH4 yr−1) northern low-latitudes (10–35° (ca. 20 yr−1), latter likely contributed from 2020. The increase is attributed emissions South Asia (6–7 Southeast (5 abruptly...