2012
Kammer, A., Schmidt, M.W.I., Hagedorn, F., (2012) Decomposition pathways of 13C-depleted leaf litter in forest soils of the Swiss Jura. Biogeochemistry, 108, 396-411.
Hiltbrunner, D., Schulze, S., Hagedorn, F., Schmidt, M.W.I., Zimmermann, S., (2012) Cattle trampling alters soil properties and changes soil microbial communities in a Swiss subalpine pasture. Geoderma, 170, 369-377.
2011
Yarnes, C., Santos, F., Singh, N., Abiven, S., Schmidt, M.W.I., Bird, J.A., (2011) Stable isotopic analysis of pyrogenic organic matter in soils by liquid chromatography isotope-ratio mass spectrometry of benzene polycarboxylic acids. Rapid Communications in Mass Spectrometry, 25, 3723-3731.
Schneider M.P.W., Lehmann J., Schmidt M.W.I. (2011): Charcoal quality does not change over a century in a tropical agro-ecosystem. Soil Biology and Biochemistry 43, 1992-1994.
Abiven S., Hengartner, P., Schneider, M.P.W., Singh, N., Schmidt, M.W.I. (2011) Pyrogenic carbon soluble fraction is larger and more aromaticin aged charcoal than in fresh charcoal Soil Biology and Biochemistry. doi:10.1016/j.soilbio.2011.03.027
Abiven S., Heim A., Schmidt M.W.I. (2011) Lignin content and chemical characteristics in maize and wheat vary between plant organs and growth stages: consequences for assessing lignin dynamics in soil. Plant and Soil, published online. DOI: 10.1007/s11104-011-0725-y.
Schneider, M.P.W., Smittenberg, R.H., Dittmar, T., Schmidt, M.W.I., (2011) Comparison of gas and liquid chromatography for the determination of benzenepolycarboxylic acids as molecular tracers of black carbon. Organic Geochemistry, 42(3), 275-282.
2010
Kindler, R., Siemens, J., Kaiser, K., Walmsley, D.C., Bernhofer, C., Buchmann, N., Cellier, P., Elbers, J., Eugster, W., Gleixner, G., Grünwald, T., Heim, A., Ibrom, A., Jans, W., Jones, S.K., Jones, M., Klumpp, K., Kutsch, W., Steenberg Larsen, K., Lehuger, S., Loubet, B., McKenzie, R., Moors, E., Osborne, B., Pilegaard, K., Rebmann, C., Saunders, M., Schmidt, M.W.I., Seyfferth, J., Skiba, U., Soussana, J.-F., Sutton, M.A., Tefs, C., Vowinckel, B., Zeeman, M.J., Kaupenjohann, M., 2010. Dissolved carbon leaching is a major component of net ecosystem carbon balances. Dissolved carbon leaching from soil is a crucial component of the net ecosystem carbon balance. Global Change Biology 17 (2) 1167-1185. DOI: 10.1111/j.1365-2486.2010.02282.x.
Schneider M. P. W., Hilf M., Vogt U.F., Schmidt M. W. I. 2010. The benzene polycarboxylic acid (BPCA) pattern of wood pyrolyzed between 200°C and 1000°C. Organic Geochemistry, 41, 1082-1088.
Eckmeier E., Egli M., Schmidt M.W.I., Schlumpf N., Nötzli M., Minikus-Stary N., Hagedorn F. 2010. Preservation of fire-derived carbon compounds and sorptive stabilisation promote the accumulation of organic matter in black soils of the Southern Alps. Geoderma, 159(1-2), 147-155.
Heim A., Hofmann A., Schmidt M.W.I. 2010. Forest-derived lignin biomarkers in an Australian Oxisol decrease substantially after 90 years of pasture. Organic Geochemistry 41 (11) 1219-1224.
Joos O., Hagedorn F., Heim A., Gilgen A. K., Schmidt M. W. I., Siegwolf. R. T. W. Buchmann, N. Summer drought reduces total and litter-derived soil CO2 effluxes in temperate grassland – clues from a 13C litter addition experiment. Biogeosciences 7, 1031-1041.
2009
Eckmeier E., van den Borg K., Schmidt M. W. I., Gerlach R. 2009. Dating charred soil organic matter - comparison of radiocarbon ages from macrocharcoals and chemically separated charcoal carbon. Radiocarbon, 51 (2) 437-443.
Hofmann, A., Heim, A., Gioacchini, P., Miltner, A., Gehre, M., Schmidt, M.W.I. 2009. Mineral fertilization did not affect decay of old lignin and SOC in a 13C-labeled arable soil over 36 years. Biogeosciences 6, 1139-1148. http://direct.sref.org/1726-4189/bg/2009-6-1139
Heim A., Wehrli L., Eugster W., Schmidt M. W. I. 2009. Effects of sampling design on the probability to detect soil carbon stock changes at the Swiss CarboEurope site Lägeren. Geoderma 149, 347-354.
Heim A., Moser N., Blum H., Schmidt M. W. I. How far do experimentally elevated CO2 levels reach into the surrounding? – An example using the 13C label of soil organic matter as an archive. Global Change Biology 15, 1598-1602. DOI 10.1111/j.1365-2486.2009.01843.x.
Hofmann A., Heim A. , Christensen B. T., Miltner A., Gehre M., Schmidt M. W. I.. 2009. Lignin dynamics in two 13C-labelled arable soils during 18-year years. European Journal of Soil Science. 60(2), 250-257.
2008
Joos O., Saurer M., Heim A., Hagedorn F., Schmidt M. W. I., Siegwolf. R. T. W. 2008. Can we use CO2 concentrations determined by continous-flow isotope ratio mass spectrometry from small samples for the Keeling plot approach? Rapid Communications in Mass Spectrometry 22, 4029-4034.
Hammes K., Torn M.S., Lapenas A. G., Schmidt M. W. I. 2008. Centennial black carbon turnover observed in a Russia steppe soil. Biogeosciences 5, 1339-1350. http://direct.sref.org/1726-4189/bg/2008-5-1339
Hammes K., Skjemstad J. O., Smernik R., Schmidt M. W. I. 2008. Characterisation and evaluation of reference materials for black carbon analyses using elemental composition, colour, BET surface area and 13C NMR spectroscopy. Applied Geochemisrt. 23, 2113-2122. (10.1016/j.apgeochem.2008.04.023)
Smernik R., Eckmeier E., Schmidt M. W. I. 2008 Comparison of solid-state 13C NMR spectra of soil organic matter from an experimental burning site acquired at two field strengths. Australian Journal of Soil Research 46, 122-127.
Wiesenberg G. L. B., Schwarzbauer J., Schmidt M. W. I., Schwark L. 2008. Plant and soil lipid modification under elevated atmospheric CO2 conditions: II. Stable carbon isotopic values (d13C). Organic Geochemistry, 39, 103-117.
Wiesenberg G. L. B., Schmidt M. W. I., Schwark L. 2008. Plant and soil lipid modifications under elevated atmospheric CO2 conditions: I. Lipid distribution patterns Organic Geochemistry 39, 91-102.
Marschner B., Brodowski S., Dreves A., Gleixner G., Grootes P. M., Hamer U., Heim A., Jandl G., Jih R., Kaiser K., Kalbitz K., Kramer C, Leinweber P., Rethemeyer J., Schmidt M. W. I., Schwark L., Wiesenberg G. L. B. 2008. How relevant is recalcitrance for the stabilization of organic matter in soils? Journal of Soil Science and Plant Nutrition 171, 91-110.
2007
SCHMIDT M. W. I., MASIELLO C. A. 2007. Interdisciplinary intercomparison of black carbon analysis in soil and sediment. EOS 88 (35), 344 (pdf 60 kB).
HEIM A., SCHMIDT M.W.I. 2007. Lignin is preserved in the fine silt fraction of an arable Luvisol. Organic Geochemistry 38. 2001-2011 (pdf 180 kB).
HAMMES K., SCHMIDT M. W. I., SMERNIK R. J., CURRIE L. A., BALL W. P., NGUYEN T. H., LOUCHOUARN P., HOUEL S., GUSTAFSSON Ö., ELMQUIST M., CORNELISSEN G., SKJEMSTAD J. O., MASIELLO C. A., SONG J., PENG P., MITRA S., DUNN J. C., HATCHER P.G., HOCKADAY W. C., SMITH D. M., CHRISTOPH HARTKOPF-FRÖDER M, AXEL BÖHMER M, LÜER B. HUEBERT B. J., AMELUNG W., BRODOWSKI S., HUANG L., ZHANG W., GSCHWEND P. M., FLORES-CERVANTES X., LARGEAU C., ROUZAUD J.-N., RUMPEL C., GUGGENBERGER G., KAISER K., RODIONOV A., GONZALEZ-VILA F. J., GONZALEZ-PEREZ J. A., DE LA ROSA J. M., MANNING D. A.C., LÓPEZ-CAPÉL E., DING L. 2007. Comparison of quantification methods to measure fire-derived (black/elemental) carbon in soils and sediments using reference materials from soil, water, sediment and the atmosphere. Global Biogeochemical Cycles 21 (3). dx.doi.org/10.1029/2006GB002914 (pdf 310 kB).
ECKMEIER E., GERLACH R., SKJEMSTAD J. O., EHRMANN O. , SCHMIDT M. W. I. . 2007. Only small changes in soil organic carbon and charcoal concentrations found one year after experimental slash-and-burn in a temperate deciduous forest. Biogeosciences 4, 377-383, 2007 (pdf 1916 KB).
ZIMMERMANN M., LEIFELD J., ABIVEN, S. SCHMIDT M. W. I. & FUHRER J.. 2007. Sodium hypochlorite separates an older soil organic matter faraction than HCl. Geoderma 139, 171-179 (pdf 600 kB).
ECKMEIER E., RÖSCH M., EHRMANN O., SCHMIDT M. W. I., SCHIER W., GERLACH, R 2007. Conversion of biomass to charcoal and the carbon mass balance from a slash-and-burn experiment in a temperate deciduous forest. Holocene 17, 539-542 (pdf 200 kB).
HAJDAS I., SCHLUMPF N., MINIKUS-STARY N., HAGEDORN F., ECKMEIER E., , SCHOCH. W., BURGA C., BONANI G., SCHMIDT M. W. I., CHERUBINI P. 2007. Radiocarbon ages of soil charcoals from the Southern Alps, Ticino, Switzerland, Nuclear Instruments and Methods in Physics Research B 259, 398-402. (pdf 350 kB).
ECKMEIER E., GERLACH R., GEHRT E., SCHMIDT M. W. I. Pedogenesis of Central European Chernozems. Geoderma 39, 288-299 pdf (710kB).
HEIM A., SCHMIDT M. W. I. 2007. Lignin turnover in arable soil and grassland analysed with two different labelling approaches. European Journal of Soil Science 58, 599-608. doi: 10.1111/j.1365-2389.2006.00848.pdf (212 kB).
2006
PRESTON C. M., SCHMIDT M. W. I. 2006. Black (pyrogenic) carbon: a synthesis of current knowledge and uncertainties with special consideration of boreal regions. Biogeoscience 3, 397-420 (pdf 1.2 MB).
HAMMES K., SMERNIK R. J., SKJEMSTAD J. O., HERZOG A., VOGT U. F., SCHMIDT M. W. I. 2006. Synthesis and characterisation of laboratory-charred grass straw (Oryza sativa) and chestnut wood (Castanea sativa) as reference materials for black carbon quantification. Organic Geochemistry 37, 1629-1633. pdf (372 kB)
ZIMMERMANN M., LEIFELD J., SCHMIDT M. W. I., FUHRER J. 2006. Measured soil organic matter fractions can be related to pools in the Roth-C model. European Journal of Soil Science. doi: 10.1111/j.1365-2389.2006.00855.x pdf (246 kB).
GERLACH R., BAUMEWERD-SCHMIDT H., VAN DEN BORG K., ECKMEIER E., SCHMIDT M. W. I. 2006. Prehistoric alteration of soil in the Lower Rhine Basin, Northwest Germany – archaeological, 14C and geochemical evidence. Geoderma 136, 38-50 pdf (450 kB).
SMERNIK RJ. , SCHWARK L. SCHMIDT M. W. I. 2006. Assessing the quantitative reliability of solid-state 13C NMR spectra of kerogen across a gradient of thermal maturity. Solid State Nuclear Magnetic Resonance 29, 312-321. pdf (259 kB).
WIESENBERG G. L. B., SCHWARK L., SCHMIDT M. W. I. 2006. Extractable lipid contents and colour in particle-size separates and bulk arable soils. European Journal of Soil Science. 57, 634-643, doi: 10.1111/j.1365-2389.2005.00754.x. pdf (819 kB).
2005
SCHMIDT M. W. I., GLEIXNER G. 2005. Carbon and nitrogen isotopic composition of bulk soils, particle size fractions and organic material after treatment with 10 % hydrofluoric acid. European Journal of Soil Science 56, 407-416 pdf (214 kB).
CZIMCZIK C. I., SCHMIDT M.W.I., SCHULZE E.-D. 2005. Effects of increasing fire frequency on black carbon, and organic matter in Podzols of Siberian Scots pine forests. European Journal of Soil Science 56, 417-428 pdf (260 kB).
2004
WIESENBERG G. L. B., SCHWARZBAUER J., SCHMIDT M. W. I., SCHWARK L. 2004. Sources and turnover rates of soil organic matter derived from n-alkane / n-carboxylic acid composition and C-isotope signatures. Organic Geochemistry 35,1371-1390 pdf (380 kB)
WIESENBERG G. L. B., SCHWARK L., SCHMIDT M. W. I. 2004. Improved automated extraction and separation procedure for soil lipid analysis. European Journal of Soil Science 55 (2) pdf (2.3 MB).
SCHMIDT M. W. I. 2004. Carbon budget in the black. Nature 427, 305-306 pdf (326 kb)
2003
SCHMIDT M. W. I., MASIELLO C. A., SKJEMSTAD J. O. 2003. Final Recommendations for reference materials in black carbon analysis. EOS 84 (52), 582-583 pdf (56 kB).
MÜLLER-BÖKER U., HAEBERLI W., ELSASSER H. BRASSEL K., ITTEN K., SCHMIDT M. W. I., WEIBEL, R. 2003. Earth in accelerated change: Habitats in the 21. century. Geographica Helvetica 58, 184-196. pdf (2.8MB)
CZIMCZIK C. I., PRESTON C. M., SCHMIDT M.W.I., SCHULZE E.-D. 2003. How surface fire in Siberian Scots pine forests affects soil organic carbon in the forest floor: Stocks, molecular structure, and conversion to black carbon (charcoal) Global Biogeochemical Cycles 17 (1) 1020 1-14 (doi: 10.1029 / 2002GB 0019 56, 2003) pdf (270 kB)
2002
SCHMIDT M. W. I., SKJEMSTAD J. O., JÄGER C. 2002. Carbon isotope geochemistry and nano-morphology of soil black carbon: Black Chernozemic soils in Central Europe originate from ancient biomass burning. Global Biogeochemical Cycles 16 (4), 1123 (doi:10.1029/2002GB001939). pdf (370 kB)
CZIMCZIK C. I., PRESTON C. M., SCHMIDT M.W.I., WERNER R. A., SCHULZE E.-D. 2002. Effects of charring on mass, organic carbon and stable carbon isotope composition of wood. Organic Geochemistry 33, 1207-1233. pdf (290 kB)
SCHMIDT M. W. I., KÖGEL-KNABNER I. 2002. Organic matter in particle-size fractions from A and B horizons of a Haplic Alisol. European Journal of Soil Science 52, 383-392. pdf (150 kB)
2001
SCHMIDT M. W. I., SKJEMSTAD J. O., KÖGEL-KNABNER I. 2001. Charred organic matter a major component of German Chernozems. In: Understanding and Managing Organic Matter in Soils, Sediments, and Waters. (Eds. Swift R. S., Spark K. M.) International Humic Substances Society, Australia and New Zealand Chapters. 289-295.
GLEIXNER G., CZIMCZIK C. I., KRAMER C., LÜKHER B., SCHMIDT M.W.I. 2001. Plant compounds and their turnover and stability as soil organic matter. In: Global Biogeochemical Cycles in the Climate System (Eds. Schulze E.-D., Harrison S. P., Heimann, M., Holland, E. A., Lloyd J., Prentice I. C., Schimel D.) Academic Press, San Diego, 201-215. pdf (2.6 MB)
SCHMIDT M. W. I., SKJEMSTAD J. O., CZIMCZIK C. I., GLASER B., PRENTICE K. M., GELINAS Y., KUHLBUSCH T. A. J. 2001. Comparative analysis of black carbon in soils. Global Biogeochemical Cycles 15, 163-167. pdf (777 kB)
2000
SCHMIDT M. W. I., NOACK A. G. 2000. Black carbon in soils and sediments: Analysis, distribution, implications, and current challenges. Global Biogeochemical Cycles 14, 777-794. pdf (8.5 MB)
SCHMIDT M. W. I., KNICKER H., KÖGEL-KNABNER I. 2000. Organic matter accumulating in Aeh and Bh horizons of a Podzol - chemical characterization in primary organo-mineral associations. Organic Geochemistry 31, 727-734.pdf (160 kB)
SCHMIDT M. W. I., KNICKER H., HATCHER P. G., KÖGEL-KNABNER I. 2000. Airborne contamination of forest soils by carbonaceous particles from industrial coal processing. Journal of Environmental Quality 29, 768-777. pdf (470 kB)
KNICKER H., SCHMIDT M. W. I., KÖGEL-KNABNER I. 2000. Nature of organic nitrogen in fine par-ticle size separates of soils of highly industrialized areas as revealed by NMR spectroscopy. Soil Biology and Biochemistry 32, 241-252. pdf (525 kB)
1999
SCHMIDT M. W. I., RUMPEL C., KÖGEL-KNABNER I. 1999. Particle size fractionation of soil comprising coal and combusted particles. European Journal of Soil Science, 50, 515-522. pdf (200 kB)
SCHMIDT M. W. I., SKJEMSTAD J. O., GEHRT, E., KÖGEL-KNABNER I. 1999. Charred organic carbon in German chernozemic soils. European Journal of Soil Science, 50, 351-365.pdf (600 kB)
SCHMIDT M. W. I., RUMPEL C., KÖGEL-KNABNER I. 1999. Evaluation of an ultrasonic dispersion procedure to isolate primary organomineral complexes from soils. European Journal of Soil Science 50, 87-94.pdf (270 kB)
KNICKER H., SCHMIDT M. W. I., KÖGEL-KNABNER I. 1999. The structure of organic nitrogen in particle size fractions determined by 15N CPMAS NMR. In: Effect of Mineral-Organic-Microorganism Interactions on Soil and Freshwater Environments. (Eds. Berthelin J., Huang P. M., Bollag J.-M., Andreux F.) Kluwer / Plenum, New York, 143-149.
1993-1998
SCHMIDT M. W. I. 1998. Organic matter in natural soils and in soils contaminated by atmospheric organic particles from coal processing industries. 140 p. Shaker, Aachen.
SCHMIDT M. W. I., KNICKER H., HATCHER P. G., KÖGEL-KNABNER I. 1997. Does ultrasonic dispersion and homogenization by ball milling change the chemical structure of organic matter in geochemical samples? a CPMAS 13C NMR study with lignin. Organic Geochemistry 26, 491-496.pdf (385 kB)
SCHMIDT M. W. I., KNICKER H., HATCHER P. G., KÖGEL-KNABNER I. 1997. Improvement of 13C and 15N CPMAS NMR spectra of bulk soils, particle size fractions and organic material by treatment with hydrofluoric acid (10%). European Journal of Soil Science 48, 319-328 pdf (900 kB)
SCHMIDT M. W. I., KNICKER H., HATCHER P. G., KÖGEL-KNABNER I. 1996. Impact of brown coal dust on the organic matter of particlesize fractions of a Mollisol. Organic Geochemistry 25, 29-39.pdf (770 kB)
SCHMIDT M. W. I., KÖGEL-KNABNER I. 1995. Bedeutung der Struktur organischer Sorbenten für die Bindung hydrophober organischer Umweltchemikalien. Zeitschrift für Geologische Wissenschaften 23, 211-218.
SCHMIDT M. W. I., TÜSELMANN H. 1993. Jamgod - agrarökologische und sozioökonomische Untersuchung eines zentralindischen Dorfes. In: Geoökologie - Beiträge zur Anwendung und Forschung (Eds. Hütter M., Reinirkens P.), Brockmeyer Verlag, Bochum, 165-174.