since 2024: Professor, Department of Atmospheric Sciences, National Central University (NCU), Taiwan
2002 – 2024: Professor for Climatology, University of Münster, Germany
1996 - 2002 Senior Research Scientist, Bayreuth Institute for Ecosystem Research (BITÖK), University of Bayreuth, Germany
1996: Habilitation, University of Bayreuth, Germany
1991 - 1996 Fraunhofer-Institute for Atmospheric Environmental Research (now KIT-IFU), Garmisch-Partenkirchen, Germany, Atmospheric Chemistry Aircraft Research
1989 -1991 Visiting Research Assistant Professor, University of New Hampshire, USA
1989: Research Scientist, College of Marine Studies, University of Delaware, USA
1988: Dr. rer. nat., University of Bayreuth, Germany
1987 – 1988: compulsory social service
1984 – 1987: PhD student, University of Bayreuth, Germany
1978 – 1984 Studies of Geoökologie (Environmental Sciences), University of Bayreuth, Germany, Diplom (equivalent to MSc degree)
期刊著作Publications:
WALI; E., TASUMI, M., KLEMM, O. (2024) Estimation of Evapotranspiration in South Eastern Afghanistan Using the GCOM-C Algorithm on the Basis of Landsat Satellite Imagery. Hydrology 11(7), 95; https://doi.org/10.3390/hydrology11070095
BREUER, B, LIN, N-H, TSENG, W, LAI, Y-J, KLEMM, O. (2023) Short Sampling Periods: A New Setup to Evaluate the Change in the Chemical Composition of Fog at High Time Resolution. Tellus B: Chemical and Physical Meteorology, 75, 33–46. DOI: https://doi.org/10.16993/tellusb.35
FORNER, J., SCHALLER, C., KLEMM, O. (2023) Methane Emission from a Small Lake after Artificially Created Ebullition. Wetlands 43, 41. https://link.springer.com/article/10.1007/s13157-023-01685-4
KOHLER, F.K., SCHALLER, C., KLEMM, O. (2022) Quantification of Urban Methane Emissions: A Combination of Stationary with Mobile Measurements. Atmosphere 13, 1596. https://doi.org/10.3390/atmos13101596
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, https://doi.org/10.1016/j.aeaoa.2022.100151
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. https://doi.org/10.3390/atmos13010062
SCHALLER, C., HOFER, B., KLEMM, O. (2022) Greenhouse gas exchange of a NW German peatland, 18 years after rewetting. Journal of Geophysical Research: Biogeosciences ttps://doi.org/10.1029/2020JG005960
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. https://doi.org/10.1007/s00468-020-02009-3
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, https://doi.org/10.1007/s10546-021-00654-w
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 https://doi.org/10.1016/j.jhydrol.2021.126491
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, https://doi.org/10.1016/j.jhydrol.2020.125934
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; https://doi.org/10.3390/atmos12030401
WIEDENHAUS, H., EHRNSPERGER, L., KLEMM, O., STRAUSS, H. (2021) Stable 15N isotopes in fine and coarse urban particulate matter. Aerosol Science & Technology, 55, 859-870. https://doi.org/ 10.1080/02786826.2021.1905150
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 https://doi.org/10.4209/aaqr.2020.07.0404
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. https://doi.org/10.1007/s11270-020-04902-6
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 192, 470. doi.org/10.1007/s10661-020-08443-7
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 https://doi.org/10.3390/ijerph17062025
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.), 30, 45- 57 DOI: 10.1127/metz/2020/1006
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. https://doi.org/10.1007/s10661-019-7639-1
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, 135, 103-112. doi.org/10.1016/j.jaerosci.2019.06.002
MEYER, H., DEVENTER, M.J., ZHAO, J, KLEMM, O. (2019) 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, doi.org/10.1155/2018/9287249
GIUFFRIDA, L., LOKYS, H.L., KLEMM, O. (2020) Assessing the effect of weather on human outdoor perception using Twitter. International Journal of Biometeorology 64, 205-216. doi: 10.1007/s00484-018-1574-7.
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, 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, doi 10.1007/s13157-017-0947-8
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, 23279–23289 DOI 10.1007/s11356-017-9941-1
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, doi.org/10.1002/eco.1826
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. DOI: 10.1016/j.scitotenv.2015.12.073
EL-MADANY, T.-S., WALK, J.B., DEVENTER, M.J., DEGEFIE, D.T., CHANG, S,-C., JUANG, J.-Y., GRIESSBAUM, F., KLEMM, O. (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
STADER, C., DEVENTER, M.J., KLEMM, O., ACHTEN, C. (2016) Turbulent transport of particle-bound PAHs: A feasibility study combining GC-APLI-MS and eddy covariance. Atmospheric Pollution Research 7, 603-610. https://doi.org/10.1016/j.apr.2016.02.005
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, 2016 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. https://doi.org/10.1016/j.agrformet.2015.08.261
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, 164–165, 328–338. http://dx.doi.org/10.1016/j.atmosres.2015.05.002
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. https://doi.org/10.1002/hyp.10517
DEVENTER, M.J., EL-MADANY, T.-S., GRIESSBAUM, F., KLEMM, O. (2015) One-year measurement of size-resolved particle fluxes in an urban area. Tellus B, 67, 25531, http://dx.doi.org/10.3402/tellusb.v67.25531
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.
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: doi:10.5194/bg-11-4507-2014
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. http://dx.doi.org/10.1016/j.atmosres.2014.03.016
DEVENTER, M.J., GRIESSBAUM, F., KLEMM, O. (2013) Size-resolved flux measurement of sub-micrometer particles over an urban area. Meteorologische Zeitschrift 6, 729 - 737. DOI: 10.1127/0941-2948/2013/0441
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 Differentia¬ted between Heavy and Light Duty Vehicles. Aerosol and Air Quality Research 13, 450–461. doi: 10.4209/aaqr.2012.07.0187
EL-MADANY, T.S., GRIESSBAUM, F., FRATINI, G., JUANG, J.-Y., CHANG, S.-C., KLEMM, O., (2013) Comparison of sonic anemometer performance under foggy conditions. Agricultural and Forest Meteorology 173, 63-73. doi.org/10.1016/j.agrformet.2013.01.005
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.org/10.1016/j.atmosenv.2012.09.069
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
BENDIX, J., EUGSTER, W. KLEMM, O. (2011): FOG – BOON OR BANE? Erdkunde 65, 228-232.
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. https://doi.org/10.1007/s13280-012-0247-8
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. DOI: 10.1016/j.atmosenv.2011.07.010
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
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
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
DAHLKÖTTER, 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
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 https://doi.org/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. DOI: 10.1007/s11356-010-0343-x
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. Atmos. Chem. Phys. 10, 5123–5133, doi:10.5194/acp-10-5123-2010
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. DOI: 10.5194/angeo-27-3571-2009
EL-MADANY, T., GEIß, H., SCHMIDT, A. & KLEMM, O. (2009) Regionalization of turbulent fluxes by combining aircraft measurements with footprint analysis. Biogeosciences Discuss. 6, 7017-7051. https://doi.org/10.5194/bgd-6-7017-2009
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. doi:10.1016/j.agrformet.2009.06.004
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. DOI: 10.1016/j.scitotenv.2009.06.006
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. DOI: 10.1080/02786820902953923
GIETL, J.K. & KLEMM, O. (2009) Analysis of traffic and meteorology on airborne particulate matter in Münster, NW Germany. Journal of the Air and Waste Management Association 59, 809-818. https://doi.org/10.3155/1047-3289.59.7.809
HARSCH, N., BRANDENBURG, M. & KLEMM, O. (2009) Large-scale lysimeter site St. Arnold, Germany: analysis of 40 years of precipitation, leachate and evapotranspiration. Hydrology and Earth System Sciences 13, 305-317. https://doi.org/10.5194/hess-13-305-2009
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. https://doi.org/10.5194/acp-8-7405-2008
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. DOI: 10.1016/j.atmosenv.2008.03.001
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. https://doi.org/10.1002/hyp.7017
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. https://doi.org/10.1175/2008JAMC1758.1
SCHMIDT, A., WRZESINSKY, T. & KLEMM, O. (2007) 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. DOI: 10.1007/s10546-007-9249-7
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. DOI: 10.1007/s11270-007-9483-0
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. DOI: 10.1007/s11270-007-9483-0
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. https://doi.org/10.1175/2007JTECHA987.1
KLEMM, O. & WRZESINSKY, T. (2007) Fog deposition fluxes of water and ions to a mountainous site in Central Europe. Tellus B 59, 705-714. DOI: 10.1111/j.1600-0889.2007.00287.x
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. https://doi.org/10.1080/02786820701227719
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. DOI: 10.1016/j.atmosenv.2006.09.036
FISCHER, G., FROHNE, T., GERHARZ, L., HILDEBRANDT, H., 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. UWSF – Z Umweltchem Ökotox 18, 155-163.
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, S55-S67. https://doi.org/10.1016/j.atmosenv.2006.03.038
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, S3-S20. https://doi.org/10.1016/j.atmosenv.2006.01.060
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, S21-S27. https://doi.org/10.1016/j.atmosenv.2006.01.061
KLEMM, O., CHANG, S.-C. & HSIA, Y.-J. (2006) Energy Fluxes at a Subtropical Mountain Cloud Forest. Forest Ecology and Management 224, 5-10. https://doi.org/10.1016/j.foreco.2005.12.003
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, S28-S42. https://doi.org/10.1016/j.atmosenv.2005.11.070
HELD, A. & KLEMM, O. (2006) Direct measurement of turbulent particle exchange with a twin CPC eddy covariance system. Atmospheric Environment 40, S92-S102. https://doi.org/10.1016/j.atmosenv.2005.09.092
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. https://doi.org/10.1016/j.atmosenv.2005.09.012
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. DOI: 10.1016/j.jaerosci.2005.06.005
KLEMM, O., WRZESINSKY, T. & SCHEER, C. (2005) Fog water flux at a canopy top: Direct meas¬ure¬ment versus one-dimensional model. Atmospheric Environment 39, 5375-5386. https://doi.org/10.1016/j.atmosenv.2005.05.041
BEIDERWIEDEN, E., WRZESINSKY, T. & KLEMM, O. (2005) Chemical characterization of fog and rain water collected at the eastern Andes cordillera. Hydrology and Earth System Sciences 9, 185-191. https://doi.org/10.5194/hess-9-185-2005
HELD, A., NOWAK, A., BIRMILI, W., WIEDENSOHLER, A., FORKEL, R. & KLEMM, O. (2004) Obser¬vations of particle formation and growth in a mountainous forest region in central Europe. Journal of Geophysical Research 109, D23204. doi:10.1029/2004JD005346
HUANG, J.-H. & KLEMM, O. (2004) Atmospheric speciation of ionic organotin, organolead and organomercury compounds in NE Bavaria (Germany). Atmospheric Environment 38, 5013-5023. DOI: 10.1016/j.atmosenv.2004.06.015
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. DOI: 10.1016/j.atmosenv.2004.02.038
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.
SCHRÖTER, M., OBERMEIER, A., PLECHSCHMIDT, M., BRÜGGEMANN, D. & KLEMM, O. (2003) Remote Monitoring of Air Pollutant Emissions from Point Sources by a Mobile Lidar/Sodar System. Journal of the Air and Waste Management Association 53, 716-723. doi: 10.1080/10473289.2003.10466213
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. DOI: 10.1016/S0169-8095(02)00087-X
BURKARD, R., EUGSTER, W., WRZESINSKY, T. & KLEMM, O. (2002) Vertical divergences of fogwater fluxes above a spruce forest. Atmospheric Research 64, 133-145. DOI: 10.1016/S0169-8095(02)00086-8
HELD, A., WRZESINSKY, T., MANGOLD, A., GERCHAU, J. & KLEMM, O. (2002) Atmospheric phase distribution of oxidized and reduced nitrogen at a forest ecosystem site. Chemosphere 48, 697-706. DOI: 10.1016/s0045-6535(02)00124-8
SCHRÖTER, M., OBERMEIER, A., BRÜGGEMANN, D. & KLEMM, O. (2002) Application of a ground–based Lidar for the study of the dynamics of ozone in a mountainous basin. Environ¬mental Science and Pollution Research 9, 381-384. https://doi.org/10.1007/BF02987586
HELD, A., HINZ, K.-P., TRIMBORN, A., SPENGLER, B. & KLEMM, O. (2002) Chemical classes of atmospheric aerosol particles at a rural site in Central Europe during winter. Journal of Aerosol Science 33, 581–594. DOI: 10.1016/S0021-8502(01)00195-1
KLEMM, O. (2001): Local and regional ozone: a student study project. Journal of Chemical Education 78, 1641–1646. DOI: 10.1021/ed078p1641
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. HTTPS://DOI.ORG/10.1007/S704-002-8211-5
KLEMM, O. & MANGOLD, A. (2001) Ozone deposition at a forest site in NE Bavaria. Water, Air, and Soil Pollution: Focus 1, 223–232. https://doi.org/10.1023/A:1013167408114
ÖMPP, A., FRICKE, W., KLEMM, O. & FRANK, H. (2001) Haloacetates in Fog and Rain. Environmental Science and Technology 35, 1294–1298. https://doi.org/10.1021/es0012220
FOKEN, T., WICHURA, B., KLEMM, O., GERCHAU, J., WINTERHALTER, M. & WEIDINGER, T. (2000) Micrometeorological conditions during the total solar eclipse of August 11, 1999. Meteorologische Zeitschrift, N.F. 10, 171–178. DOI: 10.1127/0941-2948/2001/0010-0171
WRZESINSKY, T. & KLEMM, O. (2000) Summertime fog chemistry at a mountainous site in Central Europe. Atmospheric Environment 34, 1487–1496. https://doi.org/10.1016/S1352-2310(99)00348-9
KLEMM, O., STOCKWELL, W.R., SCHLAGER, H. & KRAUTSTRUNK, M. (2000) NOx or VOC limitation in East German ozone plumes? Journal of Atmospheric Chemistry 35, 1–18. https://doi.org/10.1023/A:1006237921920
KLEMM, O. & LANGE, H. (1999) Trends of Air Pollution in the Fichtelgebirge mountains, Bavaria. Environ¬mental Science and Pollution Research 4, 193–199. https://doi.org/10.1007/BF02987325
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. https://doi.org/10.1016/S1352-2310(99)00124-7
KLEMM, O. & ZIOMAS, I.C. (1998) Urban emissions measured with aircraft. Journal of the Air and Waste Management Association 48, 16–25. DOI: 10.1080/10473289.1998.10463672
KLEMM, O., ZIOMAS, I.C., BALIS, D., SUPPAN, P., SLEMR, J., ROMERO, R. & VYRAS, L. (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. https://doi.org/10.1016/S1352-2310(97)00420-2
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 MED-CA¬PHOT-TRACE. Atmos¬pheric Environment 32, 2313–2321. doi.org/10.1016/S1352-2310(97)00414-7
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 103, 31217–31229. doi.org/10.1029/98JD02624
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.org/10.1016/S1352-2310(97)00455-X
KOßMANN, M., VOGEL, H., VOGEL, B., VÖGTLIN, R., CORSMEIER, U., FIEDLER, F., KLEMM, O. & SCHLAGER, H. (1996) The composition and vertical distribution of volatile 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. doi.org/10.1016/S0079-1946(97)81137-8
KLEMM, O. (1996) Five years of aircraft measurements of air pollution in a heavily indus¬tri¬a¬liz¬ed region in eastern Germany. Meteorologische Zeitschrift, N.F. 5, 221–233. DOI: 10.1127/metz/5/1996/221
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. doi.org/10.1021/es950145j
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 Moun¬tains - An observational study. Atmospheric Environment 30, 1271–1281. doi.org/10.1016/1352-2310(95)00408-4
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 work¬shop on air pollution transport and diffusion over coastal urban areas. Atmospheric Environ¬ment 29, 3713–3718. doi.org/10.1016/1352-2310(95)00132-I
KLEMM, O., WERHAHN, J., SCHALLER, E., SCHLAGER, H. & KRAUTSTRUNK, M. (1995) Charac¬te¬ri¬za¬ti¬on of ozone plumes in eastern Germany. Geophysical Research Letters 22, 2021–2024. doi.org/10.1029/95GL01322
KLEMM, O. & SCHALLER, E. (1994) Aircraft measurement of pollutant fluxes across the borders of eastern Germany. Atmospheric Environment 28, 2847 –2860. doi.org/10.1016/1352-2310(94)90085-X
KLEMM, O., TALBOT, R.W., FITZJARRALD, D.R., KLEMM, K.I. & LEFER, B.L. (1994) Low- to mid-tropo¬spheric profiles and biosphere/troposphere fluxes of acidic gases in the summertime Canadian taiga. Journal of Geophysical Research 99, 1687–1698. doi.org/10.1029/93JD01754
KLEMM, O., BACHMEIER, A.S., TALBOT, R.W. & KLEMM, K.I. (1994) Fog chemistry at the New Eng¬land coast: Influence of air mass history. Atmospheric Environment 28, 1181–1188. 10.1016/1352-2310(94)90295-X
LEFER, B.L., TALBOT, R.W., HARRISS, R.C., BRADSHAW, J.D., SANDHOLM, S.T., OLSON, J.O., SACHSE, G.W., COLLINS, J., SHIPHAM, 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. doi:10.1029/93jd02091
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 Geo¬phys¬ical Research 99, 1763–1779. doi.org/10.1029/93JD02090
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 in the troposphere over Canada. Journal of Geophysical Research 99, 1863–1885. doi:10.1029/93JD01841
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., GORZELSKA, K., HERLTH, D. & O'HARA, D. (1994) Summertime partitioning and budget of NOy compounds in the troposphere over Alaska and Canada: ABLE-3B. Journal of Geo¬physical Research 99, 1837–1861. doi.org/10.1029/93JD02458
PEIFFER, S., KLEMM, O., PECHER, K. & HOLLERUNG, R. (1992) Redox Measurements in Aqueous Solutions - A theoretical approach to data interpretation, based on electrode kinetics. Journal of Contaminant Hydrology 10, 1–18. 10.1016/0169-7722(92)90041-C
KLEMM, O., TALBOT, R.W. & KLEMM, K.I. (1992) Sulfur dioxide in coastal New England fog. Atmo¬spheric Environment 26A, 2063–2075. 10.1016/0960-1686(92)90091-X
KLEMM, O. & PEIFFER, S. (1991) The use of silver ion buffers for calibrating a pH2S elec¬trode cell. International Journal of Environmental Analytical Chemistry 45, 245–255. doi.org/10.1080/03067319108027390
KLEMM, O. & TALBOT, R.W. (1991) A sensitive method for measuring atmospheric concentra¬tions of sulfur dioxide. Journal of Atmospheric Chemistry 13, 325–342. doi.org/10.1007/BF00057750
LUDWIG, J. & KLEMM, O. (1990) Acidity of size-fractionated aerosol particles. Water, Air, and Soil Pollution 49, 35–50. doi.org/10.1007/BF00279508
KLEMM, O. (1990) Acid neutralization of leaf surfaces: A call for a standard unit. Environ¬men¬¬tal and Experimental Botany 30, 35–41. DOI:10.1016/0098-8472(90)90006-P
PETERS, K. & KLEMM, O. (1989) Acid fraction: A simple and useful measure in rain scavenging studies. Atmospheric Environment 23, 1157–1162. doi.org/10.1016/0004-6981(89)90317-X
LUDWIG, J. & KLEMM, O. (1988) Organic acids in different size classes of atmospheric particulate material. Tellus 40B, 340–347. doi.org/10.1111/j.1600-0889.1988.tb00108.x
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 Ger-many, and the South
Island of New Zealand. Theoretical and Applied Climatology 38, 210–221. doi.org/10.1007/BF00867414
HANTSCHEL, R. & KLEMM, O. (1987) Characterization of weak acidity in selected pre-cipita¬tion samples from a forest ecosystem. Tellus 39B, 354–362. DOI: 10.1111/j.1600-0889.1987.tb00198.x
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. doi.org/10.1016/0098-8472(87)90045-1
FREVERT, T. & KLEMM, O. (1985) Wie verändern sich pH-Werte im Regen- und Nebel-wass¬er beim Abtrocknen von Pflanzenoberflächen? Archives for Meteorology, Geo-phys¬ics, and Bioclimatology B 34, 75–81. doi.org/10.1007/BF02275676