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Latent heat exchange in the boreal and arctic biomes

In this study latent heat flux (E) measurements made at 65 boreal and arctic eddy-covariance (EC) sites were analyses by using the Penman-Monteith equation. Sites were stratified into nine different ecosystem types: harvested and burnt forest areas, pine forests, spruce or fir forests, Douglas-fir forests, broadleaf deciduous forests, larch forests, wetlands, tundra and natural grasslands. The Pen

Improving operational land surface model canopy evapotranspiration in Africa using a direct remote sensing approach

Climate change is expected to have the greatest impact on the world's economically poor. In the Sahel, a climatically sensitive region where rain-fed agriculture is the primary livelihood, expected decreases in water supply will increase food insecurity. Studies on climate change and the intensification of the water cycle in sub-Saharan Africa are few. This is due in part to poor calibration of mo

Thermal adaptation of net ecosystem exchange

Thermal adaptation of gross primary production and ecosystem respiration has been well documented over broad thermal gradients. However, no study has examined their interaction as a function of temperature, i.e. the thermal responses of net ecosystem exchange of carbon (NEE). In this study, we constructed temperature response curves of NEE against temperature using 380 site-years of eddy covarianc

Short-term effects of thinning, clear-cutting and stump harvesting on methane exchange in a boreal forest

Forest management practices can alter soil conditions, affecting the consumption and production processes that control soil methane (CH4) exchange. We studied the short-term effects of thinning, clear-cutting and stump harvesting on the CH4 exchange between soil and atmosphere at a boreal forest site in central Sweden, using an undisturbed plot as the control. Chambers in combination with a highpr

Heat storage in forest biomass improves energy balance closure

Temperature measurements in trunks and branches in a mature ca. 100 years-old mixed pine and spruce forest in central Sweden were used to estimate the heat storage in the tree biomass. The estimated heat flux in the sample trees and data on biomass distributions were used to scale up to stand level biomass heat fluxes. The rate of change of sensible and latent heat storage in the air layer below t

Evaluation of MODIS gross primary productivity for Africa using eddy covariance data

MOD17A2 provides operational gross primary production (GPP) data globally at 1 km spatial resolution and 8-day temporal resolution. MOD17A2 estimates GPP according to the light use efficiency (LUE) concept assuming a fixed maximum rate of carbon assimilation per unit photosynthetically active radiation absorbed by the vegetation (epsilon(max)). Minimum temperature and vapor pressure deficit derive

A Surface Temperature Initiated Closure (STIC) for surface energy balance fluxes

The use of Penman-Monteith (PM) equation in thermal remote sensing based surface energy balance modeling is not prevalent due to the unavailability of any direct method to integrate thermal data into the PM equation and due to the lack of physical models expressing the surface (or stomatal) and boundary layer conductances (g(S) and g(B)) as a function of surface temperature. Here we demonstrate a

Thermal optimality of net ecosystem exchange of carbon dioxide and underlying mechanisms.

• It is well established that individual organisms can acclimate and adapt to temperature to optimize their functioning. However, thermal optimization of ecosystems, as an assemblage of organisms, has not been examined at broad spatial and temporal scales. • Here, we compiled data from 169 globally distributed sites of eddy covariance and quantified the temperature response functions of net ecosys

Energy exchange and water budget partitioning in a boreal minerogenic mire

This study investigated patterns and controls of the seasonal and inter-annual variations in energy fluxes (i.e., sensible heat, H, and latent heat, lambda E) and partitioning of the water budget (i.e., precipitation, P; evapotranspiration, ET; discharge, Q; and soil water storage, Delta S) over five years (2001-2005) in a boreal oligotrophic fen in northern Sweden based on continuous eddy covaria

Differentiating moss from higher plants is critical in studying the carbon cycle of the boreal biome.

The satellite-derived normalized difference vegetation index (NDVI), which is used for estimating gross primary production (GPP), often includes contributions from both mosses and vascular plants in boreal ecosystems. For the same NDVI, moss can generate only about one-third of the GPP that vascular plants can because of its much lower photosynthetic capacity. Here, based on eddy covariance measur

Climate control of terrestrial carbon exchange across biomes and continents

Understanding the relationships between climate and carbon exchange by terrestrial ecosystems is critical to predict future levels of atmospheric carbon dioxide because of the potential accelerating effects of positive climate-carbon cycle feedbacks. However, directly observed relationships between climate and terrestrial CO2 exchange with the atmosphere across biomes and continents are lacking. H

Relation between Seasonally Detrended Shortwave Infrared Reflectance Data and Land Surface Moisture in Semi-Arid Sahel

In the Sudano-Sahelian areas of Africa droughts can have serious impacts on natural resources, and therefore land surface moisture is an important factor. Insufficient conventional sites for monitoring land surface moisture make the use of Earth Observation data for this purpose a key issue. In this study we explored the potential of using reflectance data in the Red, Near Infrared (NIR), and Shor

Soil surface CO2 efflux measurements in Norway spruce forests: Comparison between four different sites across Europe - from boreal to alpine forest

Extensive measurements of soil surface (including vegetation cover) CO2 efflux were carried out on 80 positions at four different forest sites (Sweden, Germany, Czech Republic and Italy) using a closed dynamic chamber technique. The period of measurement was 4-5 consecutive days per site. Two approaches were used to analyze the measured data, the Q(10) parameter and the Arrhenius relationship. Bas

Terrestrial Gross Carbon Dioxide Uptake: Global Distribution and Covariation with Climate

Terrestrial gross primary production (GPP) is the largest global CO2 flux driving several ecosystem functions. We provide an observation-based estimate of this flux at 123 +/- 8 petagrams of carbon per year (Pg C year(-1)) using eddy covariance flux data and various diagnostic models. Tropical forests and savannahs account for 60%. GPP over 40% of the vegetated land is associated with precipitatio

Joshua darrach - thesis

The Role of Youth in Climate Negotiations The Role of Youth in Climate Negotiations: An exploratory study into the effects of constituency status on youth participation in the UNFCCC By: Joshua Darrach josh.darrach@me.com Supervised by: Kimberly Nicholas kimberly.nicholas@lucsus.lu.se Lund University Center for Sustainability Studies Geocentrum 1, Sölvegatan 10 P.O. Box 170, SE‐221 00 LUND, Sweden

https://www.lumes.lu.se/sites/lumes.lu.se/files/joshua_darrach_-_thesis.pdf - 2026-06-22

Protokoll bs 20150408

Bibl io tekss tyrel sen Närvarande Ledamöter Eva Wiberg prorektor, stf. ordförande Björn Bergenståhl professor, Lunds Tekniska Högskola Gudrun Edgren professor, medicinska fakulteten Christofer Edling prodekan, samhällsvetenskapliga fakulteten Jan-Åke Nilsson professor, naturvetenskapliga fakulteten Vilhelm Persson prefekt, juridiska fakulteten Angelica Kauntz studeranderepresentant (t o m punkt 2

https://www.lub.lu.se/sites/lub.lu.se/files/protokoll_bs_20150408.pdf - 2026-06-22

Karss girts

LUND UNIVERSITYMASTER'S PROGRAMME IN ENVIRONMENTALSCIENCE P.O. Box 170. Stora Algatan 4 . SE-221 00. Lund, Sweden Tel: +46462220470. Fax: +46462220475 Lu NOS E-mail: lumes@envir.Iu.se. http://www.Iumes.lu.se UNIVERSITET An evaluation of environmentalloads from wastewater treatment in Latvia MadonaCaseStudy Master' s Thesis By Girts Karss Melnsila 18-20, LV 1047 Riga, Latvia Tel: +371 7610189 Email

https://www.lumes.lu.se/sites/lumes.lu.se/files/karss_girts.pdf - 2026-06-22

Bilaga Sommarpunktrutterna 2024

1 Bilaga till Svensk Fågeltaxerings årsrapport för 2024 Sommarpunktrutterna Inom Svensk Fågeltaxering drivs flera olika delprogram för att så många av våra fågelarter som möjligt skall kunna följas. En stor mängd övergripande information om Svensk Fågeltaxerings verksamhet presenteras i en årsrapport. I denna bilaga till årsrapporten redovisas grundläggande information om ett av våra delprogram –

https://www.fageltaxering.lu.se/sites/fageltaxering.lu.se/files/2025-04/Bilaga%20Sommarpunktrutterna%202024.pdf - 2026-06-22

Granslos nr1 e-version

Transnationella rörelser Gränsløs nr 1 2012 | Centrum för danmarksstudier issn 2001-4961 Transnationella rörelser Gränsløs nr 1 2012 | Centrum för danmarksstudier Gränsløs tidskrift för studier av öresundsreGionens historia, kultur oCh samhällsliv issn 2001-4961 3Gränsløs Innehållsförteckning 5 introduktion Fredrik Nilsson 15 spränGninGen av amalthea Fredrik Nilsson 31 i köpenhamn var den feminist

https://www.cors.lu.se/sites/cors.lu.se/files/granslos_nr1_e-version.pdf - 2026-06-22