@article{Vetter, author = {Vetter, Mark}, title = {Simulating water temperatures and stratification of a pre-alpine lake with a hydrodynamic model}, series = {Hydrological Processes}, volume = {28}, journal = {Hydrological Processes}, number = {3}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-20702}, pages = {1450 -- 1464}, abstract = {We report on the calibration of the one-dimensional hydrodynamic lake model Dynamic Reservoir Simulation Model to simulate the water temperature conditions of the pre-alpine Lake Ammersee (southeast Germany) that is a representative of deep and large lakes in this region. Special focus is given to the calibration in order to reproduce the correct thermal distribution and stratification including the time of onset and duration of summer stratification. To ensure the application of the model to investigate the impact of climate change on lakes, an analysis of the model sensitivity under stepwise modification of meteorological input parameters (air temperature, wind speed, precipitation, global radiation, cloud cover, vapour pressure and tributary water temperature) was conducted. The total mean error of the calibration results is -0.23 °C, the root mean square error amounts to 1.012 °C. All characteristics of the annual stratification cycle were reproduced accurately by the model. Additionally, the simulated deviations for all applied modifications of the input parameters for the sensitivity analysis can be differentiated in the high temporal resolution of monthly values for each specific depth. The smallest applied alteration to each modified input parameter caused a maximum deviation in the simulation results of at least 0.26 °C. The most sensitive reactions of the model can be observed through modifications of the input parameters air temperature and wind speed. Hence, the results show that further investigations at Lake Ammersee, such as coupling the hydrodynamic model with chemo-dynamic models to assess the impact of changing climate on biochemical conditions within lakes, can be carried out using Dynamic Reservoir Simulation Model.}, language = {en} } @article{Vetter, author = {Vetter, Mark}, title = {Using the General Lake Model (GLM) to simulate water temperatures and ice cover of a medium-sized lake}, series = {Environmental Earth Sciences}, volume = {76}, journal = {Environmental Earth Sciences}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-20710}, abstract = {Thermal dynamics of lakes has a key role in chemical and biological processes in lakes including nutrient distributions and phytoplankton growth. Applications of hydrodynamic models to lakes can provide insights into possible future alterations in thermal dynamics induced by climate change. In this study we present the calibration and validation of the newest version of the open-source hydrodynamic model GLM (General Lake Model) to the dimictic Lake Ammersee, located in south-east Germany. The simulation of lake water temperatures for the calibration period revealed an overall root mean square error of 0.65 °C and a mean error of 0.08 °C. The seasonal stratification pattern and the annual thermal structure of this dimictic lake were reproduced by the model. The model simulated the presence of winter ice cover for the only year out of eight years simulated, when ice cover was observed. Elevated lake water temperatures were also reproduced in model simulations during a period in 2003 of unusually high air temperatures. Statistical analysis of the model calibration results for Lake Ammersee indicates a fit comparable to, or better than most other well-established hydrodynamic models and provides an opportunity for continuous simulations through periods of ice cover. Our results indicate a major improvement of GLM compared with earlier model versions and demonstrate the applicability of GLM for limnophysical studies, particularly for altered forcing conditions such as climate change.}, language = {en} } @article{Vetter, author = {Vetter, Mark}, title = {Future alterations of thermal characteristics in a medium-sized lake simulated by coupling a regional climate model with a lake model}, series = {Climate Dynamics}, volume = {44}, journal = {Climate Dynamics}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-20723}, pages = {371 -- 384}, abstract = {Regional climate models (RCM) provide site-specific meteorological data at a suitable spatial resolution for the estimation of future climate-driven changes in aquatic ecosystems. In this study, we used meteorological data from the RCM weather-situation-based regionalization method (WETTREG), available for Germany, to force a one-dimensional hydrodynamic lake model to simulate climate-induced changes on the summer thermal stratification of Lake Ammersee in southern Germany. In comparison to the period of 2002-2010, an extension by 22 days of the summer stratification period was simulated for 2042-2050. Further, a vertical shift in the position of metalimnion and thermocline within the lake was not detected, but a slight increase in the metalimnion thickness during mid-summer of 1 m was simulated. Along with these changes in stratification patterns, warming for the epilimnion water temperatures during summer stratification and for the entire water body in winter were simulated for the future. By contrast the hypolimnion temperatures are simulated to decrease during the summer stratification. In addition to simulating future limno-physical aspects, the investigation demonstrates that the RCM data of the WETTREG projection are suitable for conducting climate change impact studies.}, language = {en} } @book{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Quantitative Bestimmung lokaler thermischer Eigenschaften in polykristallinem Diamant}, publisher = {K{\"o}ster}, address = {Berlin}, language = {de} } @inproceedings{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Radiometrie im UV und IR}, address = {Berlin}, language = {de} } @inproceedings{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Modernste Radiometrie und Photometrie}, address = {Berlin}, language = {de} } @inproceedings{HartmannAnhaltHollandt, author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and Hollandt, J{\"o}rg}, title = {Nearly as hot as the sun: High-temperature fixed-points for radiation thermometry and radiometry}, address = {St. Paul (USA)}, language = {en} } @inproceedings{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Photometrie und Radiometrie}, address = {Berlin}, language = {de} } @inproceedings{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Legal metrology on clinical thermometers in the European Union}, address = {Tokyo (Japan)}, language = {en} } @inproceedings{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Radiation thermometry at PTB}, address = {Tokyo (Japan)}, language = {en} } @inproceedings{HartmannReichling, author = {Hartmann, J{\"u}rgen and Reichling, M.}, title = {Complete Characterisation of local thermal heat transfer in high quality chemical vapour deposited diamond}, address = {Rom (Italien)}, language = {en} } @inproceedings{HartmannReichling, author = {Hartmann, J{\"u}rgen and Reichling, M.}, title = {Microscopic heat transfer in high quality polycrystalline diamond}, address = {Ustron (Polen)}, language = {en} } @inproceedings{HarrerDotterweichHartmannetal., author = {Harrer, S. and Dotterweich, C. and Hartmann, J{\"u}rgen and Zink, M. and Schnitzler, Tim and Ebert, Hans-Peter and Hemberger, Frank}, title = {Paraffine als Phasenwechselmaterialen in der elektrischen Isolierung von Hochspannungsbauteilen}, language = {de} } @inproceedings{HartmannThomasMaetal., author = {Hartmann, J{\"u}rgen and Thomas, R. and Ma, C.K. and Steel, A. and Hill, K.}, title = {Bilateral comparison of the local realizations of the ITS-90 between the Silver point and 1700 °C using vacuum Tungsten-strip lamps as transfer standards between NRC and PTB}, series = {Proceedings of Tempmeko 2004}, booktitle = {Proceedings of Tempmeko 2004}, editor = {Zvizdic, D.}, address = {Zagrep}, pages = {1069 -- 1073}, language = {en} } @inproceedings{HartmannTaubertFriedrichetal., author = {Hartmann, J{\"u}rgen and Taubert, Dieter Richard and Friedrich, R. and Sperfeld, P. and Hollandt, J{\"o}rg}, title = {Long-Term Stability of the Spectral Responsivity of Filter Radiometers at the PTB}, series = {Proceedings of Tempmeko 2004}, booktitle = {Proceedings of Tempmeko 2004}, editor = {Zvizdic, D.}, address = {Zagrep}, pages = {977 -- 982}, language = {en} } @inproceedings{HartmannIshiiFukuzakietal., author = {Hartmann, J{\"u}rgen and Ishii, J. and Fukuzaki, T. and McEvoy, H.C. and Simpson, R. and Machin, Graham and Gutschwager, B. and Hollandt, J{\"o}rg}, title = {A comparison of the blackbody cavities for infrared ear thermometers of NMIJ, NPL, and PTB}, series = {Proceedings of Tempmeko 2004}, booktitle = {Proceedings of Tempmeko 2004}, editor = {Zvizdic, D.}, address = {Zagrep}, pages = {1093 -- 1098}, language = {en} } @inproceedings{GutschwagerSchillerHartmannetal., author = {Gutschwager, B. and Schiller, S. and Hartmann, J{\"u}rgen and Hollandt, K.}, title = {A lens-free InGaAs transfer radiation thermometer with an extended calibration range above 960 °C}, series = {Proceedings of Tempmeko 2004}, booktitle = {Proceedings of Tempmeko 2004}, editor = {Zvizdic, D.}, address = {Zagrep}, pages = {605 -- 610}, language = {en} } @inproceedings{HartmannTaubertFischer, author = {Hartmann, J{\"u}rgen and Taubert, Dieter Richard and Fischer, Joachim}, title = {Measurements of T-T90 down to Zinc point temperatures with absolute filter radiometry}, series = {Proceedings of Tempmeko 2001}, booktitle = {Proceedings of Tempmeko 2001}, editor = {Fellmuth, B. and Seidel, J. and Scholze, G.}, publisher = {VDI Verlag}, address = {Berlin}, pages = {377 -- 382}, language = {en} } @inproceedings{HartmannReichling, author = {Hartmann, J{\"u}rgen and Reichling, M.}, title = {W{\"a}rmetransport in Kristalliten von CVD-Diamantschichten}, series = {Fr{\"u}hjahrstagung der Deutschen Physikalischen Gesellschaft}, booktitle = {Fr{\"u}hjahrstagung der Deutschen Physikalischen Gesellschaft}, number = {5}, address = {M{\"u}nster}, pages = {616 -- 616}, language = {de} } @inproceedings{HartmannReichling, author = {Hartmann, J{\"u}rgen and Reichling, M.}, title = {Der Einfluß von Korngrenzen auf die thermische Leitf{\"a}higkeit von CVD-Diamantschichten}, series = {Fr{\"u}hjahrstagung der Deutschen Physikalischen Gesellschaft}, booktitle = {Fr{\"u}hjahrstagung der Deutschen Physikalischen Gesellschaft}, number = {5}, pages = {6 -- 6}, language = {de} } @inproceedings{HartmannZaengleinKnoppetal., author = {Hartmann, J{\"u}rgen and Z{\"a}nglein, Marc and Knopp, Kevin and Lenski, Philipp and Ochs, Dennis and Arduini, Mariacarla and Hemberger, Frank and Vidi, Stephan and Manara, Jochen}, title = {Experimentierplattform f{\"u}r dynamische Materialuntersuchung}, address = {Berlin}, language = {de} } @inproceedings{HartmannKnoppLenskietal., author = {Hartmann, J{\"u}rgen and Knopp, Kevin and Lenski, Philipp and Ochs, Dennis and Z{\"a}nglein, Marc and Arduini, Mariacarla and Hemberger, Frank and Vidi, Stephan and Manara, Jochen and M{\"u}ller, Michael and M{\"o}ller, F.}, title = {Thermophysikalische Charakterisierung von W{\"a}rmed{\"a}mmschichten}, address = {Berlin}, language = {de} } @techreport{HartmannTaubertFischer, author = {Hartmann, J{\"u}rgen and Taubert, Dieter Richard and Fischer, Joachim}, title = {Measurements of T-T90 down to Zinc point temperatures with absolute filter radiometry}, address = {Paris (Frankreich)}, language = {en} } @inproceedings{EdlerGorgievaHartmannetal., author = {Edler, F. and Gorgieva, M. and Hartmann, J{\"u}rgen and Wagner, M.}, title = {Comparison of different methods for the determination of undisturbed surface temperature}, series = {Proceedings of Tempmeko 2001}, booktitle = {Proceedings of Tempmeko 2001}, editor = {Fellmuth, B. and Seidel, J. and Scholze, G.}, publisher = {VDI Verlag}, address = {Berlin}, pages = {1105 -- 1110}, language = {en} } @inproceedings{HartmannRothMoritzetal., author = {Hartmann, J{\"u}rgen and Roth, U. and Moritz, W. and Reichling, M.}, title = {Optimised strategies for thermal re-activation of LaF3/Pt-sensors based on photothermal characterisation}, series = {Photoacoustic and Photothermal Phenomena}, booktitle = {Photoacoustic and Photothermal Phenomena}, editor = {Scudieri, F. and Bertolotti, M.}, address = {Woodbury (New York)}, pages = {398 -- 400}, language = {en} }