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Pertti J Martikainen - One of the best experts on this subject based on the ideXlab platform.
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miCrobial respiration in arCtiC upland and peat soils as a sourCe of atmospheriC Carbon dioxide
Ecosystems, 2014Co-Authors: Christina Biasi, Simo Jokinen, Maija E Marushchak, Kai Hamalainen, Tatiana Trubnikova, M Oinonen, Pertti J MartikainenAbstract:Knowledge on soil miCrobial respiration (SMR) rates and thus soil-related CO2 losses from ArCtiC soils is vital beCause of the CruCial importanCe of this eCosystem within the global Carbon (C) CyCle and Climate system. Here, we measured SMR from various habitats during the growing season in Russian subarCtiC tundra by applying two different approaChes: 14C partitioning approaCh and root trenChing. The variable habitats enCompassed peat and mineral soils, bare and vegetated surfaCes and inCluded both dry and moist ones. The field experiment was Complemented by laboratory studies to measure bioavailability of soil Carbon and identify sourCes of CO2. DifferenCes in bioavailability of soils, measured in the laboratory as basal soil respiration rates, were generally greater than inter-site differenCes in SMR rates measured in situ, suggesting seCondary Constraints at field Conditions, suCh as soil C Content. There was a tendenCy towards lower SMR in vegetated peat plateaus Compared to upland mineral tundra (on average 137 vs. 185 g CO2 m−2 growing season−1, respeCtively), but no signifiCant differenCes were found. Surprisingly, the bare surfaCes (peat CirCles) with 3500-year-old C at the surfaCe exhibited about the largest SMR among all sites as shown by both methods. This was related to the general development of peat plateaus in the region, and uplifting of deeper peat with High C Content to the surfaCe during the genesis of peat CirCles. This observation is partiCularly relevant for deComposition of deeper peat in vegetated peat plateaus, where soil material similar to the bare surfaCes Can be found. The data indiCate that the large stoCks of C stored in permafrost peatlands are prinCipally available for deComposition despite old age.
Kai Hamalainen - One of the best experts on this subject based on the ideXlab platform.
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miCrobial respiration in arCtiC upland and peat soils as a sourCe of atmospheriC Carbon dioxide
Ecosystems, 2014Co-Authors: Christina Biasi, Simo Jokinen, Maija E Marushchak, Kai Hamalainen, Tatiana Trubnikova, M Oinonen, Pertti J MartikainenAbstract:Knowledge on soil miCrobial respiration (SMR) rates and thus soil-related CO2 losses from ArCtiC soils is vital beCause of the CruCial importanCe of this eCosystem within the global Carbon (C) CyCle and Climate system. Here, we measured SMR from various habitats during the growing season in Russian subarCtiC tundra by applying two different approaChes: 14C partitioning approaCh and root trenChing. The variable habitats enCompassed peat and mineral soils, bare and vegetated surfaCes and inCluded both dry and moist ones. The field experiment was Complemented by laboratory studies to measure bioavailability of soil Carbon and identify sourCes of CO2. DifferenCes in bioavailability of soils, measured in the laboratory as basal soil respiration rates, were generally greater than inter-site differenCes in SMR rates measured in situ, suggesting seCondary Constraints at field Conditions, suCh as soil C Content. There was a tendenCy towards lower SMR in vegetated peat plateaus Compared to upland mineral tundra (on average 137 vs. 185 g CO2 m−2 growing season−1, respeCtively), but no signifiCant differenCes were found. Surprisingly, the bare surfaCes (peat CirCles) with 3500-year-old C at the surfaCe exhibited about the largest SMR among all sites as shown by both methods. This was related to the general development of peat plateaus in the region, and uplifting of deeper peat with High C Content to the surfaCe during the genesis of peat CirCles. This observation is partiCularly relevant for deComposition of deeper peat in vegetated peat plateaus, where soil material similar to the bare surfaCes Can be found. The data indiCate that the large stoCks of C stored in permafrost peatlands are prinCipally available for deComposition despite old age.
Christina Biasi - One of the best experts on this subject based on the ideXlab platform.
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miCrobial respiration in arCtiC upland and peat soils as a sourCe of atmospheriC Carbon dioxide
Ecosystems, 2014Co-Authors: Christina Biasi, Simo Jokinen, Maija E Marushchak, Kai Hamalainen, Tatiana Trubnikova, M Oinonen, Pertti J MartikainenAbstract:Knowledge on soil miCrobial respiration (SMR) rates and thus soil-related CO2 losses from ArCtiC soils is vital beCause of the CruCial importanCe of this eCosystem within the global Carbon (C) CyCle and Climate system. Here, we measured SMR from various habitats during the growing season in Russian subarCtiC tundra by applying two different approaChes: 14C partitioning approaCh and root trenChing. The variable habitats enCompassed peat and mineral soils, bare and vegetated surfaCes and inCluded both dry and moist ones. The field experiment was Complemented by laboratory studies to measure bioavailability of soil Carbon and identify sourCes of CO2. DifferenCes in bioavailability of soils, measured in the laboratory as basal soil respiration rates, were generally greater than inter-site differenCes in SMR rates measured in situ, suggesting seCondary Constraints at field Conditions, suCh as soil C Content. There was a tendenCy towards lower SMR in vegetated peat plateaus Compared to upland mineral tundra (on average 137 vs. 185 g CO2 m−2 growing season−1, respeCtively), but no signifiCant differenCes were found. Surprisingly, the bare surfaCes (peat CirCles) with 3500-year-old C at the surfaCe exhibited about the largest SMR among all sites as shown by both methods. This was related to the general development of peat plateaus in the region, and uplifting of deeper peat with High C Content to the surfaCe during the genesis of peat CirCles. This observation is partiCularly relevant for deComposition of deeper peat in vegetated peat plateaus, where soil material similar to the bare surfaCes Can be found. The data indiCate that the large stoCks of C stored in permafrost peatlands are prinCipally available for deComposition despite old age.
Khaerunissa Herni - One of the best experts on this subject based on the ideXlab platform.
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CARBON DIOXIDE EMISSION FACTOR ESTIMATION FROM INDONESIAN COAL
'Puslitbang tekMIRA', 2018Co-Authors: Damayanti Retno, Khaerunissa HerniAbstract:Climate Change will beCome the priority for the air quality management. It foCuses more on Carbon dioxide emission. Indonesia whiCh has power generation dominated by Coal Combustion is expeCted to develop the national CO2 emission faCtor. Due to the High variation in Indonesia Coal rank and its growing magnitude in CO2 emission Caused by the future Coal-fired power plant development, the CharaCteristiC emission value beComes an important ConCern. The method used in this study is developed from the IPCC Guidelines for Energy. The Conversion unit plays an important role in the CalCulation method. The result shows that the Higher in C Content, the lower in its CO2 emission faCtor. It means that Coal Classified as High C Content or High heating value will produCe low Carbon dioxide emission faCtor. The average CO2 emission faCtor obtained in Indonesian Coal is 99,718 kg CO2/TJ with an average value of Carbon Content 27.2 kg C/GJ, and NCV equal to 19.8 TJ/Gg. Coal rank is Categorized as lignite to subbituminous or bituminous
M Oinonen - One of the best experts on this subject based on the ideXlab platform.
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miCrobial respiration in arCtiC upland and peat soils as a sourCe of atmospheriC Carbon dioxide
Ecosystems, 2014Co-Authors: Christina Biasi, Simo Jokinen, Maija E Marushchak, Kai Hamalainen, Tatiana Trubnikova, M Oinonen, Pertti J MartikainenAbstract:Knowledge on soil miCrobial respiration (SMR) rates and thus soil-related CO2 losses from ArCtiC soils is vital beCause of the CruCial importanCe of this eCosystem within the global Carbon (C) CyCle and Climate system. Here, we measured SMR from various habitats during the growing season in Russian subarCtiC tundra by applying two different approaChes: 14C partitioning approaCh and root trenChing. The variable habitats enCompassed peat and mineral soils, bare and vegetated surfaCes and inCluded both dry and moist ones. The field experiment was Complemented by laboratory studies to measure bioavailability of soil Carbon and identify sourCes of CO2. DifferenCes in bioavailability of soils, measured in the laboratory as basal soil respiration rates, were generally greater than inter-site differenCes in SMR rates measured in situ, suggesting seCondary Constraints at field Conditions, suCh as soil C Content. There was a tendenCy towards lower SMR in vegetated peat plateaus Compared to upland mineral tundra (on average 137 vs. 185 g CO2 m−2 growing season−1, respeCtively), but no signifiCant differenCes were found. Surprisingly, the bare surfaCes (peat CirCles) with 3500-year-old C at the surfaCe exhibited about the largest SMR among all sites as shown by both methods. This was related to the general development of peat plateaus in the region, and uplifting of deeper peat with High C Content to the surfaCe during the genesis of peat CirCles. This observation is partiCularly relevant for deComposition of deeper peat in vegetated peat plateaus, where soil material similar to the bare surfaCes Can be found. The data indiCate that the large stoCks of C stored in permafrost peatlands are prinCipally available for deComposition despite old age.