Essays about: "Atmospheric concentrations of CO2 and CH4."

Found 3 essays containing the words Atmospheric concentrations of CO2 and CH4..

1. 1. Improvement of Pt-based catalyst supported on CeZrO2 used for the high-temperature water-gas shift reaction

   University essay from Lunds universitet/Kemiteknik (CI)

   Author : Milda Grikainyte; [2022]
   Keywords : Water-gas shift; catalyst; chemical engineering; Chemistry;

   Abstract : The iron-chromium (Fe/Cr) catalyst is used for high-temperature water-gas shift (HT WGS) reaction. A major concern using the Fe/Cr catalyst is that it contains hexavalent chromium (Cr+6) which is a potent carcinogen causing health and environmental issues. READ MORE

3. 2. Rhizosphere Priming and Methane Oxidation in Agricultural Soil - Effect of Land Use on Atmospheric Concentrations of CO2 and CH4 and Climate Change

   University essay from Lunds universitet/Miljövetenskaplig utbildning

   Author : Esben Øster Mortensen; [2017]
   Keywords : The Priming Effect; Rhizosphere; Methane Oxidation; Land Use; Agriculture; Soil Ecology; Microorganisms; Climate Change; Atmospheric concentrations of CO2 and CH4.; Earth and Environmental Sciences; Biology and Life Sciences; Agriculture and Food Sciences;

   Abstract : Rhizosphere interactions have high influence on the fluxes of carbon to and from terrestrial ecosystems. One very important part of the rhizosphere interactions is the rhizosphere priming effect (RPE) which is defined as changes in the decomposition rate of soil organic matter (SOM) in response to labile organic carbon input from plant roots. READ MORE

4. 3. The effects of managed ruminants grazing on the global carbon cycle and greenhouse gas forcing

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Jakob Lagerstedt; [2006]
   Keywords : ruminants; ecological modeling; carbon cycle; geography; physical geography; LPJ-DGVM; C ; Earth and Environmental Sciences;

   Abstract : Populärvetenskaplig sammanfattning: Kolcykeln är enkelt uttryckt den globala balansräkningen av kolets (C) förflyttning genom olika sfärer såsom mellan atmosfären och biosfären, således är kolcykeln av stor betydelse för mänsklighetens existens. Exempelvis har atmosfäriska koncentrationer av koldioxid (CO2) och metan (CH4) ökat de senaste 200 hundra åren på grund av mänskliga aktiviteter (till stor del en förflyttning av kol från olika sfärer till atmosfären direkt eller indirekt via olika mekanismer såsom t. READ MORE