Otto Klemm
© (c) privat

Prof. Dr. Otto Klemm

Professor für Klimatologie
Heisenbergstr. 2
48149 Münster, Germany
Raum 535
Tel.: +49 251 83 33921
Fax: +49 251 83 38338

Sprechstunden: Di, 10 - 12 Uhr und nach Vereinbarung
evtl. Änderungen: siehe Aktuelles

  • Artikel - peer review (ISI)


    • Kohler, F.K., Schaller, C., Klemm, O. (2022) Quantification of Urban Methane Emissions: A Combination of Stationary with Mobile Measurements. Atmosphere 13, 1596.

    • Ehrnsperger, L., Klemm, O. (2022) Air pollution in an urban street canyon: Novel insights from highly resolved traffic information and meteorology. Atmospheric Environment X 13, 100151,

    • Schaller, C., Hofer, B., Klemm, O. (2022) Greenhouse gas exchange of a NW German peatland, 18 years after rewetting. Journal of Geophysical Research - Biogeosciences.

    • Klemm, O., Ahrens, A., Arnswald, M., Bethke, R., Berger,D.F., Blankenhaus, K., Blauth, L., Breuer, B., Buchholz, S., Burek, F., Ehrnsperger, L., Funken, S., Henninger, E., Hohl, J., Jöllenbeck, N., Kirgasser, P., Kuhls, M., Paas, B., Roters, L.A., Schaller, C., Schlüter, H. (2022) The Impact of Traffic and Meteorology on Urban Particle Mass and Particle Number Concentrations: Student-Led Studies Using Mobile Measurements before, during, and after the COVID-19 Pandemic Lockdowns. Atmosphere 13, 62.


    • Esders, E.M., Klemm, O., Breuer, B., Lai, Y-J., Yu, J.-C., Lai, I-L. (2021) Use of a flexible chamber to measure stem respiration. Trees 35, 319-323.
    • Baumberger, M., Breuer, B., Lai, Y.-J., Gabyshev, D., Klemm, O., (2021) Bidirectional Turbulent Fluxes of Fog at a Subtropical Montane Cloud Forest Covering a Wide Size Range of Droplets. Boundary-Layer Meteorology,
    • Breuer, B., Klemm, O., Lai, Y-J, Lin, P-H, Meyer, H., Nieberding, F., Song, Q-H (2021) Up and down: Bidirectional fluxes of fog droplets at two subtropical mountain forest sites, Journal of Hydrology 601, 126491
    • Fritz, J., Meyer, H., Tseng, W., Lin, N.-H., Klemm, O. (2021) Covariation of droplet size distribution and air humidity in fog: A methodological approach. Journal of Hydrology 594,
    • Biehl, J., Paas, B., Klemm, O (2021) Ventilation of a Mid-Size City under Stable Boundary Layer Conditions: A Simulation Using the LES Model PALM. Atmosphere 401;
    • Wiedenhaus, H., Ehrnsperger, L., Klemm, Strauss, H. (2021) Stable 15N isotopes in fine and coarse urban particulate matter. Aerosol Science & Technology 55, 859-870.


    • Ehrnsperger, L., Klemm, O. (2020) Source Apportionment of Urban Ammonia and its Contribution to Secondary Particle Formation in a Mid-size European City. Aerosol and Air Quality Research
    • Maneke-Fiegenbaum, F., Heupel Santos, S., Klemm, O., Yu, J.-C., Chiang, P.N., Lai, Y.-J. (2020) Carbon Dioxide Fluxes of a Young Deciduous Afforestation Under the Influence of Seasonal Precipitation Patterns and Frequent Typhoon Occurrence. Journal of Geophysical Research: Biogeosciences DOI: 10.1029/2020JG005996
    • Mühlig, A., C., Klemm, O., Gonçalves, F.L.T. (2020) Fog, Temperature and Air Quality Over the Metropolitan Area of São Paulo: a Trend Analysis from 1998 to 2018. Water Air Soil Pollut 231:535.
    • Gabyshev, D.N., Fedorets, A.A., Klemm, O. (2020) Condensational Growth of Water Droplets in an External Electric Field at Different Temperatures. Aerosol Science & Technology, DOI: 10.1080/02786826.2020.1804522
    • Carreras, H., Ehrnsperger, L., Klemm, O., Paas, B. (2020) Cyclists’ exposure to air pollution: in situ evaluation with a cargo bike platform. Environ Monit Assess (2020) 192: 470.
    • Segalin, B., Fornaro, A., Kumar, P., Klemm, O., Andrade, M.F., Trezza, B.M., Busse, A., Filho, W.J., Gonçalves, F.L.T. (2020) Chemical Composition of Quasi-ultrafine Particles and their Sources in Elderly Residences of São Paulo Megacity. Aerosol and Air Quality Research 20, 1002–1015. doi: 10.4209/aaqr.2019.09.0462
    • Goulier,L., Paas ,B., Ehrnsperger, L., Klemm, O. (2020) Modelling of Urban Air Pollutant Concentrations with Artificial Neural Networks Using Novel Input Variables. International Journal of Environmental Research and Public Health 17, 2025.
    • Paas, B., Zimmermann, T., Klemm, O. (2020) Analysis of a turbulent wind field in a street canyon: Good agreement between LES model results and data from a mobile platform. Meteorologische Zeitschrift (Contrib. Atm. Sci.), PrePub DOI 10.1127/metz/2020/1006
    • Giuffrida, L., Lokys, H.L., Klemm, O. (2018) Assessing the effect of weather on human outdoor perception using Twitter. /International Journal of Biometeorology/ doi: 10.1007/s00484-018-1574-7


    • Berger, S., Braeckevelt, E., Blodau, C., Burger, M., Goebel, M., Klemm, O., Knorr, K.-H., Wagner-Riddle, C. (2019) A 1-year greenhouse gas budget of a peatland exposed to long-term nutrient infiltration and altered hydrology: high carbon uptake and methane emission. Environ Monit Assess 191, 533
    • Gabyshev, D.N., Fedorets, A.A., Aktaev, N.E., Klemm, O., Andreev, S.N. (2019) Acceleration of the condensational growth of water droplets in an external electric field. Journal of Aerosol Science;
    • Meyer, H., Deventer, M.J., Zhao, J, Klemm, O. (in press) CO2 emissions from cities: Indirect budget approach versus direct flux measurement. Meteorologische Zeitschrift (Contrib. Atm. Sci.), Vol. 28, No. 5, 379–387, DOI 10.1127/metz/2019/0869
    • Maurer, M., Klemm, O., Lokys, H.L., Lin, N.-H. (2019) Trends of Fog and Visibility in Taiwan: Climate Change or Air Quality Improvement? Aerosol and Air Quality Research 19, 896–910. DOI: 10.4209/aaqr.2018.04.0152


    • Maneke-Fiegenbaum, F., Klemm, O., Lai, Y.-J., Hung, C.-Y., Yu, J-C. (2018) Carbon exchange between the atmosphere and a subtropical evergreen mountain forest in Taiwan. /Advances in Meteorology, /
    • Nieberding, F., Breuer, B., Braeckevelt, E., Klemm, O.,Song, Q., Zhang, Y. (2018) Fog Water Chemical Composition on Ailaoshan Mountain, Yunnan Province, SW China. /Aerosol and Air Quality Research/, 18, 37-48 doi: 10.4209/aaqr.2017.01.0060


    • El-Madany, T.S., Niklasch, K., Klemm, O. (2017) Stomatal and non-stomatal turbulent deposition flux of ozone to a managed peatland. Atmosphere 8 (9), 175. doi:10.3390/atmos8090175
    • Philipp, K., Juang, J.-Y., Deventer, M.J., Klemm, O. (2017) Methane Emissions from a Subtropical Grass Marshland, Northern Taiwan. Wetlands, in print
    • Peitzmeier, C., Loschke, C., Wiedenhaus, H., Klemm, O. (2017) Real-world vehicle emissions as measured by in situ analysis of exhaust plumes. Environmental Science and Pollution Research, in print
    • Song, Q.-H., Braeckevelt, E., Zhang, Y.-P., Sha, L.-Q., Zhou,W.-J., Liu, Y-T., Wu,,C.-S., Lu, Z-Y., Klemm, O. (2017) Evapotranspiration from a primary subtropical evergreen forest in Southwest China. Ecohydrology e1826,


    • Fleischer E., Khashimov I., Hölzel N., Klemm O. (2016) Carbon exchange fluxes over peatlands in Western Siberia: Possible feedback between land-use change and climate change. Science of the Total Environment 545–546, 424–433.
    • C. Stader, M.J. Deventer, O. Klemm, C. Achten (2016) Turbulent transport of particle-bound PAHs: A feasibility study combining GC-APLI-MS and eddy covariance. Atmospheric Pollution Research 7, 603-610. DOI: 10.1016/j.apr.2016.02.005

    • T.S. El-Madany, J.B. Walk, M.J. Deventer, D.T. Degefie, S.-C. Chang, J.-Y. Juang, F. Griessbaum, O. Klemm (2016) Canopy- atmosphere interactions under foggy condition - size-resolved fog droplet fluxes and their implications. Journal of Geophysical Research – Biogeosciences 121, 796-808. DOI: 10.1002/2015JG003221


    • Klemm, O., Tseng, W.-T., Lin. C.-C., Klemm, K.I., Lin, N.-H. (2015) pH Control in Fog and Rain in East Asia: Temporal Advection of Clean Air Masses to Mt. Bamboo, Taiwan. Atmosphere, 6, 1785-1800. DOI:10.3390/atmos6111785
    • Klemm, O. Lin, N.-H. (2015) What Causes Observed Fog Trends: Air Quality or Climate Change?  Aerosol and Air Quality Research 16, 1131-1142. DOI: 10.4209/aaqr.2015.05.0353

    • Simon, S. Klemm, O., El-Madany, T., Walk, J., Amelung, K., Lin, P.-H., Chang, S.-C., Lin, N.-H., Engling, G., Hsu, S.-C., Wey, T.-H., Wang, Y.-N., Lee, Y.-C. (2015)  Chemical composition of fog water at four sites in Taiwan. Aerosol and Air Quality Research 16, 618-631. DOI: 10.4209/aaqr.2015.03.0154

    • Deventer, M.J., Held, A., El-Madany, T.-S., Klemm, O. (2015) Size-resolved eddy covariance fluxes of nucleation to accumulation mode aerosol particles over a coniferous forest.Agricultural and Forest Meteorology 214-215, 328-340, DOI: 10.1016/j.agrformet.2015.08.261

    • Fleischer, E., Bölter, J., Klemm, O. (2015) Summer Evapotranspiration near Tyumen, Western Siberia: A Comparison between Eddy Covariance and Penman Method Formulations. Hydrological Processes 29, 4498-4513. DOI: 10.1002/hyp.10517

    • Degefie, D.T., El-Madany, T.-S., Held, M., Hejkal, J., Hammer, E., Dupont, J.-C., Haeffelin, M., Fleischer, E., Klemm, O. (2015) Fog chemical composition and its feedback to fog water fluxes, water vapor fluxes and microphysics in the evolution of two events near Paris. Atmospheric Research 164, 328-338. DOI: 10.1016/j.atmosres.2015.05.002

    • Deventer, M.J.; El-Madany, T.; Griessbaum, O.; Klemm, O. (2015): One-year measurement of size-resolved particle fluxes in an urban area. Tellus B 2015, 67, 25531, DOI: 10.3402/tellusb.v67.25531
    • Degefie, T.D., El-Madany, T., Hejkal, J., Held, M., Dupont, J.-C., Haeffelin, M., Klemm, O. (2015) Microphysics and energy and water fluxes of various fog types at SIRTA, France, Atmospheric Research 151, 162-175. DOI: 10.1016/j.atmosres.2014.03.016


    • Degefie, D.T., Fleischer, E., Klemm, O., Soromotin, A.V., Soromotina, O.V., Tolstikov, A.V.,  Abramov,  N.V. (2014) Climate Extremes in South Western Siberia: Past and Future. Stochastic Environmental Research and Risk Assessment. DOI:  10.1007/s00477-014-0872-9
    • El-Madany, T.S., Duarte, H.F., Durden, D.J., Paas, B., Deventer, M.J., Juang, J.-Y., Leclerc, M.Y., Klemm, O.  (2014) Low-level jets and above canopy drainage as causes for turbulent exchange in the nocturnal boundary layer. Biogeosciences, 11, 4507-4519. DOI: 10.5194/bg-11-4507-2014,
    • Chu, H.-S., Chang, S.-C., Klemm, O., Lai, C.-W., Lin, Y.-Z., Wu, C.-C., Lin, J.-Y., Jiang, J.-Y., Chen, J., Gottgens, J. F., Hsia, Y.-J. (2014) Does canopy wetness matter? Evapotranspiration from a subtropical montane cloud forest in Taiwan. Hydrological Processes 28, 1190-1214. DOI: 10.1002/hyp.9662


    • Gerharz, L.E., Klemm, O., Broich, A.V., Pebesma, E. (2013) Spatio-temporal modelling of individual exposure to air pollution. Atmospheric Environment 64, 56-65. DOI: 10.1016/j.atmosenv.2012.09.069
    • Deventer, M.J., Griessbaum, F., Klemm, O. (2013) Size-resolved flux measurement of sub-micrometer particles over an urban area. Meteorologische Zeitschrift 6. DOI: 10.1127/0941-2948/2013/0441 Download
    • Nickel, C., Kaminski, H., Hellack, B., Quass, U., John, A., Klemm, O., Kuhlbusch, T.A.J., (2013) Size Resolved Particle Number Emission Factors of Motorway Traffic Differentia­ted between Heavy and Light Duty Vehicles. Aerosol and Air Quality Research 13, 450–461. DOI: 10.4209/aaqr.2012.07.0187


    • Büns, C., Klemm, O., Wurzler, S., Hebbinghaus, H., Steckelbach, I., Friesel, J., Ebel, A., Friese, E., Jakobs, H., Memmesheimer, M. (2012) Comparison of four years of air pollution data with a mesoscale model. Atmospheric Research 118, 404-417. DOI: 10.1016/j.atmosres.2012.07.009
    • Broich, A.V., Gerharz, L.E., Klemm, O. (2012) Personal Monitoring of Exposure to Particulate Matter with a High Temporal Resolution. Environmental Science and Pollution Research 19, 2959-2972. DOI: 10.1007/s11356-012-0806-3
    • Klemm, O., Schemenauer, R.S., Lummerich, A., Cereceda, P., Marzol, V., Corell, D., van Heerden, J., Reinhard, D., Gherezghiher, T., Olivier, J., Osses, P., Sarsour, J., Frost, E., Estrela, M.J., Valiente, J.A., Fessehaye, G.M. (2012) Fog as a Fresh-Water Resource: Overview and Perspectives. AMBIO 41, 221-234. DOI: 10.1007/s13280-012-0247-8 Download


    • Gonser, S., Klemm, O., Griessbaum, F., Chang, S.-C., Chu, H.-S., Hsia, Y.-J. (2011) The Relation Between Humidity and Liquid Water Content in Fog: An Experimental Approach. Pure and Applied Geophysics 169, 821-833. DOI: 10.1007/s00024-011-0270-x Download
    • Beuck, H., Quass, U., Klemm, O., Kuhlbusch, T. (2011) Assessment of sea salt and mineral dust contributions to PM10 in NW Germany using tracer models and Positive Matrix Factorization. Atmospheric Environment 45, 5813-5821 Download
    • Langner, C. & Klemm, O. (2011) A Comparison of model performance between AERMOD and AUSTAL2000. Journal of the Air & Waste Management Association 61, 640-646. DOI: 10.3155/1047-3289.61.6.640
    • Kroll, A., Gietl, J.K., Wiesmüller, G.A., Günsel, A., Wohlleben, W., Schnekenburger, J., & Klemm, O. (2011) In Vitro Toxicology of Ambient Particulate Matter: Correlation of Cellular Effects with Particle Size and Components. Environmental Toxicology, DOI: 10.1002/tox.20699


    • Griessbaum, F., Moat, B.I., Narita, Y., Yelland, M. J., Klemm, O. & Uematsu, M. (2010) Uncertainties in wind speed dependent CO2 transfer velocities due to airflow distortion at anemometer sites on ships. Atmospheric Chemistry and Physics 10, 5123-5133, doi:10.5194/acp-10-5123-2010. Copyright: ACP, Download
    • Dahlkoetter, F., Griessbaum, F., Schmidt, A. & Klemm, O. (2010) Direct measurement of CO2 and particle emissions from an urban area. Meteorologische Zeitschrift 19, 565-575. DOI: 10.1127/0941-2948/2010/0492.  Copyright: E.Schweizerbart, Download
    • Klemm, O., Ziemba, L. D., Griffin, R. J., Sive, B.C., Whitlow, S. Carpenter, K., Klemm, K.I. & Talbot, R. (2010) A detailed aerosol particle plume analysis. J. Geophys. Res. 115, D21211 doi: 10.1029/2010JD014153
    • Sträter, E., Westbeld, A. & Klemm, O. (2010) Pollution in coastal fog at Alto Patache, Northern Chile. Environ. Sci. Poll. Res. 17, 1563-1573


    • Westbeld, A., Klemm, O., Griessbaum, F., Sträter, E., Larrain, H., Osses, P. & Cereceda, P. (2009) Fog deposition to a Tillandsia carpet in the Atacama Desert. Annales Geophysicae 27, 3571-3576. Download
    • Mildenberger, K., Beiderwieden, E., Hsia, Y.-J. & Klemm, O. (2009) CO2 and water vapor fluxes above a subtropical mountain cloud forest (Taiwan) - the effect of light conditions and fog. Agricultural and Forest Meteorology 149, 1730-1736. Copyright: SienceDirect
    • Gerharz, L.E., Krüger, A. & Klemm, O. (2009) Applying indoor and outdoor modeling techniques to estimate individual exposure to PM2.5 from personal GPS profiles and diaries: A pilot study. Science of the Total Environment 407, 5184-5193. Copyright: ScienceDirect
    • Gietl, J. K. & Klemm, O. (2009) Source identification of size-segregated aerosol in Münster, Germany, by factor analysis. Aerosol Science and Technology 43, 828-837. Copyright: Taylor & Francis
    • Gietl, J. K. & Klemm, O. (2010) Analysis of traffic and meteorology on airborne particulate matter in Münster, NW Germany. Journal of the Air and Waste Management Association 59, 809-818.
    • Harsch, N., Brandenburg, M. & Klemm, O. (2009) Large Scale Iysimeter site St. Arnold, Germany: analysis of 40 years of precipitation, leachate and evapotranspiration. Hydrology and Earth System Science 13, 305-317


    • Gietl, J.K. & Klemm, O. (2008) Analysis of traffic and meteorology on airborne particulate matter in Münster, NW Germany. Journal of the Air and Waste Management Association, in press. Copyright: AWMA
    • Harsch, N., Brandenburg, M. & Klemm, O. (2008) Large-scale lysimeter site St. Arnold, Germany: analysis of 40 years of precipitation, leachate and evapotranspiration. Hydrolology and Earth System Sciences 13, 305-317. Copyright: HESS, Download
    • Schmidt, A. & Klemm, O. (2008) Direct determination of highly size-resolved turbulent particle fluxes with the disjunct eddy covariance method and a 12 – stage electrical low pressure impactor. Atmospheric Chemistry and Physics 8, 7405–7417. Copyright: ACP, Download
    • Gietl, J.K., Tritscher, T. & Klemm, O. (2008) Size-segregated analysis of PM10 at two sites, urban and rural, in Münster (Germany) using five-stage Berner type impactors. Atmospheric Environment 42, 5721-5727.
    • Beiderwieden, E., Wolff, V., Hsia, Y.-J. & Klemm, O. (2008) It goes both ways: Measurements of simultaneous evapotranspiration and fog droplet deposition at a montane cloud forest. Hydrological Processes 22, 4181-4189. Copyright: InterScience, Download
    • Katata, G., Nagai, H., Wrzesinsky, T., Klemm, O., Eugster, W. & Burkard, R. (2008) Development of a Land Surface Model Including Cloud Water Deposition on Vegetation. Journal of Applied Meteorology and Climatology 47, 2129–2146. Copyright: AMS
    • Klemm, O., Wrzesinsky, T., Gerchau, J. & Grießbaum, F. (2008) A collector for fog water and interstitial aerosol. Journal of Atmospheric and Oceanic Technology 25, 335-340. Copyright: AMS
    • Schmidt, A., Wrzesinsky, T. & Klemm, O. (2008) Gap Filling and Quality Assessment of CO2 and Water Vapour Fluxes above an Urban Area with Radial Basis Function Neural Networks. Boundary-Layer Meteorology 126, 389-413. Copyright: Springer


    • Beiderwieden, E., Schmidt, A., Hsia, Y.-J., Chang, S.-C., Wrzesinsky, T. & Klemm, O. (2007) Nutrient input through occult and wet deposition into a subtropical montane cloud forest. Water, Air & Soil Pollution 186, 273-288.
    • Beiderwieden, E., Klemm, O. & Hsia, Y.-J. (2007) The impact of fog on the energy budget of a subtropical cypress forest in Taiwan. Taiwan Journal of Forest Science 22, 227-239.
    • Gocht, T., Klemm, O. & Grathwohl, P. (2007) Long-term atmospheric bulk deposition of polycyclic aromatic hydrocarbons (PAHs) in rural areas of Southern Germany. Atmospheric Environment 41, 1315-1327. Copyright: Elsevier, Download
    • Held, A., Niessner, R., Bosveld, F., Wrzesinsky, T. & Klemm, O. (2007) Evaluation and Application of an Electrical Low Pressure Impactor in Disjunct Eddy Covariance Aerosol Flux Measurements. Aerosol Science and Technology 41, 510-519.
    • Klemm, O. & Wrzesinsky, T. (2007) Fog Deposition Fluxes of Water and Ions to a Mountainous Site in Central Europe. Tellus B 59, 705-714.


    • Fischer, G., Frohne, T., Gerharz, L., Hildebrandt, M., Klemm, O., Mildenberger, K., Nording, C., Rehberger, I., Schiffer, M. & Voulkoudis, C. S. (2006) Veränderungen des NO / NO2- Verhältnisses in Nordrhein-Westfalen (1984–2004) und mögliche Ursachen. Z Umweltchem Ökotox 18, 155-163. Copyright: Ecomed, Download
    • Held, A., Nowak, A., W., Wiedensohler, A. & Klemm, O. (2006) Field measurements and size-resolved model simulations of turbulent particle transport to a forest canopy. Journal of Aerosol Science 37, 786-798. Copyright:  Elsevier, Download
    • Held, A. & Klemm, O. (2006) Direct measurement of turbulent particle exchange with a twin CPC eddy covariance system. Atmospheric Environment 40, 91-102. Copyright: Elsevier, Download
    • Forkel, R., Klemm, O., Graus, M., Rappenglück, B., Stockwell, W.R., Grabmer, W., Held, A., Hansel, A. & Steinbrecher, R. (2006) Trace gas exchange and gas phase chemistry in a Norway spruce forest: A study with a coupled 1-dimensional canopy atmospheric chemistry emission model. Atmospheric Environment 40, 28-42. Copyright: Elsevier
    • Klemm, O., Chang, S.-C. & Hsia, Y.-J. (2006) Energy Fluxes at a Subtropical Mountain Cloud Forest. Forest Exology and Management 224, 5-10. Copyright: Elsevier
    • Ganzeveld, L., Klemm, O., Rappenglück, B. & Valverde-Canossa, J. (2006) Evaluation of Meteorological Parameters over a Coniferous Forest in a Single-Column Chemistry-Climate Model. Atmospheric Environment 40, 21-27. Copyright: Elsevier
    • Klemm, O., Held, A., Forkel, R. Gasche, R., Kanter, H.-J., Rappenglück, B., Steinbrecher, R., Müller, K., Plewka, A., Cojocariu, C., Kreuzwieser, J., Valverde-Canossa, J., Schuster, G., Moortgat, G.K., Graus, M. & Hansel, A. (2006) Experiments on forest/atmosphere exchange: Climatology and fluxes during two summer campaigns in NE Bavaria. Atmospheric Environment 40, 3-20. Copyright: Elsevier, Download
    • Valverde-Canossa, J., Ganzeveld, L., Rappenglück, B., Steinbrecher, R., Klemm, O., Schuster, G. & Moortgart, G.K. (2006) First measurements of H2O2 and organic peroxides surface fluxes by the relaxed eddy-accumulation technique. Atmospheric Environment 40, 55-67. Copyright: Elsevier


    • Beiderwieden, E., Wrzesinsky, T. & Klemm, O. (2005) Chemical characterization of fog and rain collected at the eastern Andes cordillera. Hydrology and Earth System Sciences 9, 185-191. Download
    • Klemm, O., Wrzesinsky, T. & Scheer, C. (2005) Fog water flux at a canopy top: Direct measurement versus one-dimensional model. Atmospheric Environment 39, 5375-5386. Copyright: Elsevier, Download
    • Vogt, E., Held, A. & Klemm, O. (2005) Sources and concentrations of gaseous and particulate reduced nitrogen in the city of Münster (Germany). Atmospheric Environment 39, 7393-7402. Copyright: Elsevier, Download


    • Held, A., Nowak, A., Birmili, W., Wiedensohler, A., Forkel, R. & Klemm, O. (2004) Observations of particle formation and growth in a mountainous forest region in central Europe. Journal of Geophysical Research 109, D23204, doi:10.1029/2004JD005346. Copyright: AGU, Download
    • Huang, J.-H. & Klemm, O. Atmospheric speciation of ionic organotin, organolead and organomercury compounds in NE Bavaria (Germany). Atmospheric Environment 38, 5013-5023. Copyright: Elsevier, Download
    • Pryor, S.C. & Klemm, O. (2004) Experimentally derived estimates of nitric acid dry deposition velocity and viscous sub-layer resistance at a conifer forest. Atmospheric Environment 38, 2769-2777. Copyright: Elsevier, Download


    • Held, A., Hinz, K.-P., Trimborn, A., Spengler, B. & Klemm, O. (2003) Towards direct measurement of turbulent vertical fluxes of compounds in atmospheric aerosol particles. Geophysical Research Letters 30, doi:10.1029/2003GL017854. Copyright: AGU, Download
    • Schröter, M., Obermeier, A., Brüggemann, D., Plechschmidt, M. & Klemm, O. (2003) Remote monitoring of air pollutant emissions from pouint sources by a mobile LIDAR/Sodar system. Journal of the Air and Waste Management Association 53, 716-723.


    • Burkard, R., Eugster, W., Wrzesinsky, T. & Klemm, O. (2002) Vertical divergences of fogwater fluxes above a spruce forest. Atmospheric Research 64, 133-145. Copyright: Elsevier, Download
    • Held, A., Klemm, O., Hinz, K.-P., Trimborn, P. & Spengler, B. (2002) Chemical classes of atmospherric aerosol particles at a rural site in Central Europe during winter. Journal Aerosol Sciences 33, 581-594. Copyright: Elsevier, Download
    • Held, A., Wrzesinsky, T., Mangold, A., Gerchau, J. & Klemm, O. (2002) Atmospheric phase distribution of oxidized and reduced nitrogen at a forest ecosystem research site. Chemosphere 48, 697-706. Copyright: Elsevier, Download
    • Klemm, O., Milford, C., Sutton, M. A., van Putten, E. & Spindler, G. (2002) A climatology of leaf surface wetness. Theoretical and Applied Climatology 71, 107-117. Copyright: Springer, Download
    • Schröter, M., Obermeier, A., Brüggemann, D. & Klemm, O. (2002) Application of Ground-Based Lidar for Studies of the Dynamics of Ozone in a Mountainous Basin. Environmental Science & Pollution Research 9, 381-384. Copyright: Ecomed, Download
    • Thalmann, E., Burkard, R., Wrzesinsky, T., Eugster, W. & Klemm, O. (2002) Ion fluxes from fog and rain to an agricultural and a forest ecosystem in Europe. Atmospheric Research 64, 147-158. Copyright: Elsevier, Download


    • Foken, T., Wichura, B., Klemm, O., Gerchau, J., Winterhalter, M. & Weidinger, T. (2001) Micrometeorological conditions during the total solar eclipse of August 11, 1999. Meteorologische Zeitschrift 10, 171-178. Copyright: Bornträger, Download
    • Klemm, O. (2001) Local and Regional Ozone: A Students' Study Project. Journal of Chemical Education 78, 1641-1646. Copyright: JCE, Download
    • Klemm, O. & Mangold, A. (2001) Ozone Deposition at a Forest Site in NE Bavaria. Water, Air and Soil Pollution 1, 223-232. Copyright: Kluwer, Download
    • Römpp, A., Fricke, W., Klemm, O. & Frank, H. (2001) Haloacetates in Fog and Rain. Environmental Science Technology 35, 1294-1298. Reprint auf Anfrage, doi:10.1021/es0012220


    • Klemm, O., Stockwell, W. R., Schlager, H. & Krautstrunk, M. (2000) NOxor VOC Limitation in East German Ozone Plumes? Journal of Atmospheric Chemistry 35, 1-18. Reprint auf Anfrage, doi:10.1023/A:1006237921920
    • Krautstrunk, M., Neumann-Hauf, G., Schlager, H., Klemm, O., Beyrich, F., Corsmeier, U., Kalthoff, N. & Kotzian, M. (2000) An experimental study on the planetary boundary layer transport of air pollutants over East Germany. Atmospheric Environment  34, 1247-1266. Reprint auf Anfrage, doi:10.1016/S1352-2310(99)00124-7
    • Wrzesinsky, T. & Klemm, O. (2000) Summertime Fog Chemistry at a Mountainous Site in Central Europe. Atmospheric Environment 34, 1487-1496. Copyright: Elsevier, Download


    • Klemm, O. & Lange, H. (1999) Trends of Air Pollution in the Fichtelgebirge Mountains, Bavaria. Environmental Science & Pollution Research 6, 193-199. Copyright: Ecomed, Download


    • Klemm, O., Stockwell, W. R., Schlager, H. & Ziereis, H. (1998) Measurements of Nitrogen Oxides from Aircraft in the Northeast Atlantic Flight Corridor. Journal of Geophysical Research D 103/31, 217-229. doi:10.1029/98JD02624
    • Klemm, O. & Ziomas, I. C. (1998) Urban Emissions Measured with Aircraft. Journal of the Air and Waste Management Association 48, 16-25.
    • Klemm, O., Ziomas, I. C., Balis, D., Suppan, P., Slemr, J., Romero, R. & Vyras, L. G. (1998) A summer air-pollution study in Athens, Greece. Atmospheric Environment 32, 2071-2087.  doi:10.1016/S1352-2310(97)00424-X
    • Melas, D., Ziomas, I.C., Klemm, O. & Zerefos, C.S. (1998) Flow dynamics in the Athens area under moderate large-scale ambient winds. Atmospheric Environment 32, 2209-2222.  doi:10.1016/S1352-2310(97)00436-6
    • Melas, D., Ziomas, I.C., Klemm, O. & Zerefos, C.S. (1998) Anatomy of the sea breeze circulation in the Athens area under weak large-scale ambient winds. Atmospheric Environment 32, 2223-2237.  doi:10.1016/S1352-2310(97)00420-2
    • Schumann, U., Schlager, H., Arnold, F., Baumann, R., Haschberger, P. & Klemm, O. (1998) Dilution of aircraft exhaust plumes at cruise altitudes. Atmospheric Environment 32, 3097-3103.  doi:10.1016/S1352-2310(97)00455-X
    • Svensson, G. & Klemm, O. (1998) Aircraft measurements and model simulations of the air quality in Athens, Greece. Atmospheric Environment 32, 2269-2290.  doi:10.1016/S1352-2310(97)00428-7
    • Ziomas, I.C., Tzoumaka, P., Balis, D., Melas, D., Zerefos, C. & Klemm, O. (1998) Ozone episodes in Athens, Greece: A modelling approach using data from the MEDCAPHOT-TRACE. Atmospheric Environment 32, 2313-2321.  doi:10.1016/S1352-2310(97)00414-7


    • Kossmann, M., Vogel, H., Vogel, B., Vögtlin, R., Corsmeier, U., Fiedler, F., Klemm, O. & Schlager, H. (1996) The composition and vertical distribution of volantile organic compounds in southwestern Germany, eastern France and northern Switzerland during the TRACT Campaign in September 1992. Physics and Chemistry of the Earth 21, 429-433.
    • Klemm, O. (1996) Five years of aircraft measurements of air pollution in a heavily industrialized region in eastern Germany. Meteorologische Zeitschrift, N.F. 5, 221-223.
    • Klemm, O., Hahn, M. K. & Giehl, H. (1996) Airborne, continuous measurement of carbon monoxide in the lower troposphere. Environmental Science and Technology 30, 115-120.
    • Beyrich, F., Acker, K., Kalaß, D., Klemm, O., Möller, D., Schaller, E., Werhahn, J. & Weisensee, U. (1996) Boundary layer structure and photochemical pollution in the Harz Mountains - An observational study. Atmospheric Environment 30, 1271-1281.


    • Kambezidis, H. D., Melas, D., Moussiopoulos, N., Walmsley, J. L., Bornstein, R. B., Klemm, O., Asimakopoulos, D. N. & Schiermeier, F. A. (1995) NATO/CCMS pilot study workshop on air pollution transport and diffusion over coastal urban areas. Atmospheric Environment 29, 3713-3718.
    • Klemm, O., Werhahn, J., Schaller, E., Schlager, H. & Krautstrunk, M. (1995) Characterization of ozone plumes in eastern Germany. Geophysical Research Letters 22, 2021-2024.


    • Klemm, O. & Schaller, E. (1994) Aircraft measurement of pollutant fluxes across the borders of eastern Germany. Atmospheric Environment 28, 2847-2860.
    • Klemm, O., Talbot, R. W., Fitzjarrald, D. R., Klemm, K. I. & Lefer, B. L. (1994) Low- to mid troposheric profiles and biosphere/troposphere fluxes of acidic gases in the summertime Canadian taiga. Journal of Geophysical Research 99, 1687-1698.
    • Klemm, O., Bachmeier, A. S., Talbot, R. W. & Klemm, K. I. (1994) Fog chemistry at the New England coast. Influence of air mass history. Atmospheric Environment 28, 1181-1188.
    • Lefer, B. L., Talbot, R. W., Harriss, R. C., Bradshaw, J. D., Sandholm, S. T., Olson, J. O., Sachse, G. W., Collins, J., Shimpham, M. A., Blake, D. R., Klemm, K. I., Klemm, O., Gorzelska, K. & Barrick, J. (1994) Enhancement of acidic gases in biomass burning impacted air masses over Canada. Journal of Geophysical Research 99, 1721-1738.
    • Gorzelska, K., Talbot, R. W., Klemm, K. I., Lefer, B., Klemm, O., Gregory, G. L., Anderson, B. & Barrie, L. A. (1994) Chemical composition of the atmospheric aerosol in the troposphere over the Hudson Bay lowlands and Quebec-Labrador regions of Canada. Journal of Geophysical Research 99, 1863-1885.
    • Talbot, R. W., Bradshaw, J. D., Sandholm, S. T., Singh, H. B., Sachse, G. W., Collins, J., Gregory, G. L., Anderson, B., Blake, D., Barrick, J., Browell, E. V., Klemm, K. I., Lefer, B. L., Klemm, O., Gorzelska, K., Olson, J., Herlth, D., & O'Hara, D. (1994) Summertime distribution and relations of reactive nitrogen species and NOy compounds in the troposphere over Canada. Journal of Geophysical Research 99, 1863-1885.
    • Sandholm, S. T., Olson, J., Bradshaw, J. D., Talbot, R. W., Singh, H. B., Gregory, G. L., Blake, D., Anderson, B., Sachse, G. W., Barrick, J., Collin, J., Klemm, K. I., Lefer, B., Klemm, O., Gorzeska, K., Herlth, D. & O'Hara, D. (1994) Summertime partitioning and budget of NOy compunds in the troposphere over Alaska and Canada: ABLE-3B. Journal of Geophysical Research 99, 1837-1861.


    • Pfeiffer, S., Klemm, O., Pecher, K. & Hollerung, R. (1992) Redox Measurements in Aqueous Solutions - A theoretical approach to data interpretation, based on electrode kindetics. Journal of Contaminant Hydrology 10, 1-18.
    • Klemm, O., Talbot, R. W. & Klemm, K. I. (1992) Sulfur dioxide in coastal New England fog. Atmospheric Environment 26A, 2063-2075.


    • Klemm, O. & Pfeiffer, S. (1991) The use of silver ion buffers for calibrating a pH2S electrode cell. International Journal of Environmental Analytical Chemistry 45, 245-255.
    • Klemm, O. & Talbot, R. W. (1991) A sensitive method for measuring atmospheric concentrations of sulfur dioxide. Journal of Atmospheric Chemistry 13, 325-341.


    • Ludwig, J. & Klemm, O. (1990) Acidity of size-fractionated aerosol particles. Water, Air, and Soil Pollution 49, 35-50
    • Klemm, O. (1990) Acid neutralization of leaf surfaces: A call for a standard unit. Environmental and Experimental Botany 30, 35-41.


    • Peters, K. & Klemm, O. (1989) Acid fraction: A simple and useful measure in rain scavenging studies. Atmospheric Environment 23, 1157-1162.


    • Ludwig, J. & Klemm, O. (1988) Organic acids in different size classes of atmospheric particulate material. Tellus 40B, 340-347.


    • Verhoeven, W., Herrmann, R., Eiden, R. & Klemm, O. (1987) A comparison of the chemical composition of fog and rainwater collected in the Fichtelgebirge, F. R. of Germany, and the South Island of New Zealand. Theoretical and Applied Climatology 38, 210-221.
    • Hantschel, R. & Klemm, O. (1987) Characterization of weak acidity in selected precipitation samples from a forest ecosystem. Tellus 39B, 354-362.
    • Klemm, O., Riederer, M. & Frevert, T. (1987) pH-response on leaves and isolated cuticles of Hedera helix L. after wetting with artificial rainwater. Environmental and Experimental Botany 27, 349-355.


    • Frevert, T. & Klemm, O. (1985) Wie verändern sich pH-Werte im Regen- und Nebelwasser beim Abtrocknen von Pflanzenoberflächen? Archives for Meteorology, Geophysics, and Bioclimatology B 34, 75-81.


  • Forschungsschwerpunkte


































    • Klimatologie
    • Lufthygiene
    • Mikrometeorologie
    • Aerosolpartikel
    • Nebelforschung


































  • Curriculum Vitae (Kurzfassung)


    seit 10/2002 Professor für Klimatologie an der Universität Münster
    1996 Habilitation
    04/1996 - 09/2002 Wissenschaftlicher Angestellter und Oberassistent, Universität Bayreuth, Bayreuther Institut für Terrestrische Ökosystemförschung (BITÖK)
    09/1991 - 03/1996 Wissenschaftlicher Angestellter, Leiter der Arbeitsgruppe Flugzeugmessungen, und freier Mitarbeiter, Fraunhofer-Institut für Atmosphärische Umweltforschung (IFU) Garmisch-Partenkirchen
    08/1989 - 08/1991 Visiting Research Assistant Professor, University of New Hampshire, USA
    05/1989 - 08/1989 Research Scientist, College of Marine Studies, University of Delaware, USA
    1988 Promotion zum Dr. rer. nat.
    03/1984 - 07/1987 Wissenschaftlicher Angestellter und Doktorand, Universität Bayreuth
    10/1978 - 02/1984 Studium der Geoökologie, Abschluss Diplom


In the space of one hundred and seventy-six years the Lower Mississippi has shortened itself two hundred and fourty-two miles. That is an average of a trifle over one mile and a third per year. Therefore, any calm person, who is not blind or idiotic, can see that in the Old Olitic Silurian Period, just a million years ago next November, the Lower Mississippi River was upward of one million three hundred thousand miles long, and stuck out over the Gulf of Mexico like a fishing rod. And by the same token any person can see that seven hundred and forty-two years from now the Lower Mississippi will be only a mile and three-quarters long, and Cairo and New Orleans will have joined their streets together, and be plodding comfortably along under a single mayor and a mutual board of alderman. There is something fascinating about science. One gets such wholesome returns of conjecture out of a trifling investment of fact.
Mark Twain, Life on the Mississippi, 1896