Search results

The measured net ecosystem exchange (NEE) of CO2 between the ecosystem and the atmosphere reflects the balance between gross CO2 assimilation [gross primary production (GPP)] and ecosystem respiration (R-eco). For understanding the mechanistic responses of ecosystem processes to environmental change it is important to separate these two flux components. Two approaches are conventionally used: (1)

Alkyl glycosides were synthesised from starch and alcohols using Aspergillus oryzae a-amylase as catalyst. In the degradation of starch by a-amylase, the alcohols competed with water as glycosyl acceptors. In the reaction with methanol, methyl maltoside and methyl maltotrioside were the main alcoholysis products. Conversion of 45 g/1 starch in 30% methanol resulted in a product mixture containing

Exchange of non-CO2 trace gases between the land surface and the atmosphere plays an important role in atmospheric chemistry and climate. Recent studies have highlighted its importance for interpretation of glacial-interglacial ice-core records, the simulation of the pre-industrial and present atmosphere, and the potential for large climate-chemistry and climate-aerosol feedbacks in the coming cen

Data from four soil profiles studied through pollen and macroscopic charcoal analyses were used to identify specific palynological assemblages associated with a traditional land-use system documented in the Eastern Ligurian Apennines (NW Italy) between the 18th and early 20th century, concerning a cyclical use of grey alder plots for temporary cultivations involving to the use of controlled fire.

We present an evaluation of a nested high-resolution Goddard Earth Observing System (GEOS)-Chem chemistry transport model simulation of tropospheric chemistry over tropical South America. The model has been constrained with two isoprene emission inventories: (1) the canopy-scale Model of Emissions of Gases and Aerosols from Nature (MEGAN) and (2) a leaf-scale algorithm coupled to the Lund-Potsdam-

We investigated if coarse-resolution satellite data from the MODIS sensor can be used for regional monitoring of insect disturbances in Fennoscandia. A damage detection method based on z-scores of seasonal maximums of the 2-band Enhanced Vegetation Index (EVI2) was developed. Time-series smoothing was applied and Receiver Operating Characteristics graphs were used for optimisation. The method was

One of the major concerns regarding climate change in high latitudes is the potential feedback from greenhouse gases (GHG) being released from thawing peat soils. In this paper we show how vegetational patterns and associated GHG fluxes in subarctic palsa (peat mounds with a permanently frozen core) mires can be linked to climate, based on field observations from fifteen palsa sites distributed in

This paper discusses the effects of vegetation cover and soil parameters on the climate change projections of a regional climate model over the Arctic domain. Different setups of the land surface model of the regional climate model HIRHAM were realized to analyze differences in the atmospheric circulation caused by (1) the incorporation of freezing/thawing of soil moisture, (2) the consideration o

Bästa resultat får du om du öppnar den här PDF-portföljen i Acrobat X eller Adobe Reader X eller senare. Hämta Adobe Reader nu! http://www.adobe.com/go/reader_download_se Postadress Box 117, 221 00 Lund Besöksadress Sangatan 1 Telefon 046-222 70 32, Växel 046-222 00 00 E-post tim.ekberg@rektor.lu.se Webbadress www.lu.se Avdelning Planer ing Tim Ekberg Revidering av arbetsordning för riskutskottet

https://www.lu.se/sites/www.lu.se/files/protokoll-bilagor-us-200612.pdf - 2026-05-20

C:\Brenes_Diego.pdf.prn.pdf Private Sector Participation in the Water Industry - Who benefits and who loses? Diego Brenes e-mail: diego.brenes.745@student.lu.se Supervisor: Tareq Emtairah e-mail: tareq.emtairah@iiiee.lu.se Lund University International Master’s Programme in Environmental Science Graduation Thesis 19 November 2002 1 Abstract Water provision is one of the critical problems for human

https://www.lumes.lu.se/sites/lumes.lu.se/files/brenes_diego.pdf - 2026-05-20

Recent evidence shows that warm semi-arid ecosystems are playing a disproportionate role in the interannual variability and greening trend of the global carbon cycle given their mean lower productivity when compared with other biomes (Ahlström et al. 2015 Science, 348, 895). Using multiple observations (land-atmosphere fluxes, biomass, streamflow and remotely sensed vegetation cover) and two state

https://www.staff.lu.se/support-and-tools/it-mail-and-telephony/it-support-error-reporting-and-advice - 2026-05-20

The term “Holocene temperature conundrum” refers to the inconsistencies between proxy-based reconstructions and transient model simulations, and it challenges our understanding of global temperature evolution during the Holocene. Climate reconstructions indicate a cooling trend following the Holocene Thermal Maximum, while model simulations indicate a consistent warming trend due to ice-sheet retr

As the climate warms, the timing of plant phenology around the world is changing in response. Herbarium records offer a wealth of data that can be used to analyze phenological trends over time. While much research has been done on early spring flowering species, there is still a dearth of knowledge of climate change effects on summer and autumn flowering species. This study uses herbarium data to

To this day, the question of what factors drive economic development and catching-up remains deeply controversial in growth literature. The concept of social capability provides a useful framework to investigate the relationship of the parallel processes of transformation, inclusion, autonomy and accountability with economic performance. Nevertheless, there are few attempts to quantify social capa

Klimatet och klimatförändringen är för många abstrakt. Något man förstår vikten av men har svårt att intuitivt greppa. Kort och gott så är klimatet en generell bild av vädret över en längre period, vanligtvis sett över 30 år. Ett klimatscenario målar den globala klimatbilden, och observationer tyder på att vi globalt är i linje med det mest pessimistiska framtida klimatscenario, där kännbara föränThe European Corn Borer (ECB) has the potential to markedly reduce the yield from corn plants and in turn affect the economy of farmers. The human world population is increasing and there is consequently an increased number of mouths to feed on a limited area, the Earth, and this makes this an important topic to study. It is thus important to find out whether the ECB likely will be an important pe

Predicted responses of transpiration to elevated atmospheric CO2 concentration (eCO2) are highly variable amongst process-based models. To better understand and constrain this variability amongst models, we conducted an intercomparison of 11 ecosystem models applied to data from two forest free-air CO2 enrichment (FACE) experiments at Duke University and Oak Ridge National Laboratory. We analysed