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[ID: 306] Validation for Land Surface Temperature, Aerosol Optical Depth and Water Vapour Sentinel-3 products (LAW)
PI: Emma Dodd
The LAW project is focused on strengthening the validation of three important satellite derived datasets, including Land Surface Temperature product SL_2_LST. LAW aims to provide a more extensive and systematic validation of this Sentinel 3 LST product by extending the current network of measurements to currently non-validated biomes and regions. We aim to do this by deploying appropriate instrumentation to measure LST in situ to extend the current network of measurements in locations such as ICOS Svartberget ATC.
[ID: 305] Hg Ostergarnsholm
PI: Wei Zhu
Air-sea exchange of gaseous elemental mercury (Hg0) is not well constrained, even though it is a major component of the global Hg cycle. Lack of Hg0 flux measurements to validate parameterizations of the Hg0 transfer velocity contributes to this uncertainty. We measured the Hg0 flux on the Baltic Sea coast using micrometeorological methods (two gradient-based and relaxed eddy accumulation (REA)) as well as a gas exchange model. We found that coastal waters were typically supersaturated with Hg0 (mean ± 1 = 13.5 ± 3.5 ng m-3; ca. 10 % of total Hg) compared to the atmosphere (1.3 ± 0.2 ng m-3). The Hg0 flux calculated using the gas exchange model ranged from 0.1 – 1.3 ng m-2 h-1 (10th and 90th percentile) over the course of the campaign (May 10 – June 20, 2017) and showed a distinct diel variation. The mean coastal Hg0 fluxes determined with the two gradient-based approaches and REA were 0.3, 0.5 and 0.6 ng m-2 h-1, respectively. In contrast, the mean open sea Hg0 flux measured with REA was larger (6.3 ng m-2 h-1). The open sea Hg0 flux indicated a stronger wind speed dependence for the transfer velocity of Hg0 compared to commonly used parameterizations. Although based on a limited data set, we suggest that the wind speed dependence of the Hg0 transfer velocityis more in line with gases that have a lower water solubility than CO2 (e.g. O2). More land-based Hg0 flux measruements using direct micrometerological methods could significantly improve our understanding of air-sea Hg exchange.
[ID: 304] gödsling av gran och tallplantor
Försöket läggs ut på fyra lokaler i Götaland, en gradient i bördighet ska eftersträvas för att se om effekten av gödsling skiljer sig åt på olika lokaler. Tre olika gödselmedel testas , dessutom planteras en ogödslad kontrollplanta. Tall-och granplantor ingår i försöket som ska ska följas under tre års tid.
Försöket är ett uppdrag åt ICL och är ska följas under en växtsäsong. Granplantor ska förses med olika varianter av sk. 'slow-release' gödningsmedel av olika varianter. Lokalen finns i Jätsberg strax söder om Växjö
[ID: 302] Föryngringsinventering Södra
PI: Martin Ahlström
Uppföljning av föryngringsresultat i Götaland. Stickprovsundersökning. Cirka 60 lokaler ingår i inventeringen.
[ID: 300] LifePlan
PI: Johan Westin
Poor understanding of biodiversity and its drivers due to 1) lack of relevant data 2) complex processes underlying the biodiversity dynamics and lack of tools for converting the data that we have into a true understanding of the processes behind them. The aim with LIFEPLAN is to overcome both these hurdles by bringing together the key expertise needed to generate and interpret Big Ecological Data for a global synthesis of biotic patterning across our planet uniting community ecology, methods for automated species recognition, and Bayesian statistics for immense data. The LIFEPLAN venture will generate a well-standardized global data for a substantial proportion of all species. Such standardization is achieved through semi-automated methods, producing comparable data independent of the exact expertise of the person or team conducting the sampling. Based on a recent revolution in sampling methodology, such a sampling design is now finally achievable.
[ID: 299] Studying the impact of N fertilization on the CO2 and CH4 exchanges of a boreal nutrient-poor mire
PI: Järvi Järveoja
The overarching goal of the project is to obtain an in-depth understanding of the peatland C cycle response to increased N input using an automated chamber system established on natural, moss and bare peat plots. More specifically, this set up will enable to study the effects of N fertilization on the individual carbon dioxide (CO2) and methane (CH4) exchanges and their various underlying component fluxes.
[ID: 298] The landscape-atmosphere-industry greenhouse gas budget of forest biomass production: Does sustainable forestry result in negative emissions?
PI: Matthias Peichl
The main goal of this project is to develop an integrated estimate of the landscape-atmosphere-industry greenhouse gas budget for a managed forest landscape (i.e. Krycklan) in boreal Sweden. This will be based on a landscape-scale GHG flux estimate using tall tower eddy-covariance and stream discharge measurements, >500 forest inventory plots, and a life cycle assessment of forest product emissions.
[ID: 297] Gleon DOM seasons
PI: Andrew Tanentzap
Dissolved organic matter (DOM) is central to the functioning of lakes, but its molecular composition remains a “blackbox” at large spatial and temporal scales. This project aims to understand how the origin and composition of DOM varies through time using ultra-high-resolution mass spectrometry and its association with biogeochemical data collected from high-frequency sensors (e.g. dissolved oxygen, chlorophyll a, fDOM/CDOM). We are interested in collecting surface water samples at a monthly interval for 1 year from the deepest point in your study lakes. We will process all samples using a standardized protocol and make data freely available for reuse on a cloud server. Sampling will run between Jan 2021 and Dec 2021 with standardized consumables.
[ID: 296] 2405 Peltovaara
PI: Fredrik Sjödin
Syftet med försöket är att studera föryngringsmetoder i svåra klimatlägen. Försöket utgörs av en huvudlokal i Pelttovaara och en referenslokal i Kissavaara. Klimatmätningar har utförts i anslutning till försökslokalerna. Försöket markbereddes med harv och högläggare. Planterades med tall (3 provenienser), gran (3 provenienser), contortatall, svartgran, vitgran och rysk lärk på sydväst- och nordostsluttning samt på krönet av 478 m höga Peltovaara, på gränsen till Ätnarova försökspark. Försöket anlades av Claes Fries, Inst f Skogsskötsel, SLU Umeå.
[ID: 295] 1477 Flakaliden snow depth measurements
PI: Ulla Nylander
Data from snow depth measurements at Flakaliden experimental site. Measurements at three different areas: in the forest stand (on going, start 1988), close to the climate station (on going, start 2008) and in a clear-cut area (1991-1998).
[ID: 294] Inside the black box: assessing the stability of the greenhouse gases storage in northern peatland.
PI: Audrey Campeau
Sweden is dotted with thousands of peatlands, acting as localized reservoirs of soil organic carbon and its decomposition end-products; carbon dioxide (CO2) and methane (CH4), two potent greenhouse gases (GHG). The stability of this vast GHG storage is critical to limit the current growth in atmospheric climate forcing. This project sets out to assess the stability of the GHG storage within two contrasting peatlands types, a northern poor fen (Degerö Stormyr - Sweden) and an ombrotrophic bog (Mer Bleue- Canada). This will be achieved through the use of new sensor technology, allowing to continuously measure CO2 concentrations at different depths across vertical peat profiles. The preliminary data reveals rapid sequential losses in CO2 concentrations, from the surface down to 1.5m depth at Degerö Stormyr. These losses reoccur every year at the same period, mostly in autumn, when the thermal stratification of the peat profile is removed by surface cooling. The estimated loss of CO2 from the catotelm during those events is sufficiently large to neutralize the peatland’s annual C sink. These results indicate that the hydrological and physical processes controlling the storage and transport of GHG in the catotelm have not been well understood. This raises concerns regarding the stability of the GHG storage in northern peatlands, which appear far more dynamic than currently assumed.