TY - JOUR A1 - Verma, Meetu A1 - Denker, Carsten A1 - Balthasar, H. A1 - Kuckein, Christoph A1 - González Manrique, Sergio Javier A1 - Sobotka, M. A1 - Gonzalez, N. Bello A1 - Hoch, S. A1 - Diercke, Andrea A1 - Kummerow, Philipp A1 - Berkefeld, T. A1 - Collados Vera, M. A1 - Feller, A. A1 - Hofmann, A. A1 - Kneer, F. A1 - Lagg, A. A1 - Löhner-Böttcher, J. A1 - Nicklas, H. A1 - Pastor Yabar, A. A1 - Schlichenmaier, R. A1 - Schmidt, D. A1 - Schmidt, W. A1 - Schubert, M. A1 - Sigwarth, M. A1 - Solanki, S. K. A1 - Soltau, D. A1 - Staude, J. A1 - Strassmeier, Klaus G. A1 - Volkmer, R. A1 - von der Lühe, O. A1 - Waldmann, T. T1 - Horizontal flow fields in and around a small active region The transition period between flux emergence and decay JF - Polymers N2 - Context. The solar magnetic field is responsible for all aspects of solar activity. Thus, emergence of magnetic flux at the surface is the first manifestation of the ensuing solar activity. Aims. Combining high-resolution and synoptic observations aims to provide a comprehensive description of flux emergence at photospheric level and of the growth process that eventually leads to a mature active region. Methods. The small active region NOAA 12118 emerged on 2014 July 17 and was observed one day later with the 1.5-m GREGOR solar telescope on 2014 July 18. High-resolution time-series of blue continuum and G-band images acquired in the blue imaging channel (BIC) of the GREGOR Fabry-Perot Interferometer (GFPI) were complemented by synoptic line-of-sight magnetograms and continuum images obtained with the Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamics Observatory (SDO). Horizontal proper motions and horizontal plasma velocities were computed with local correlation tracking (LCT) and the differential affine velocity estimator (DAVE), respectively. Morphological image processing was employed to measure the photometric and magnetic area, magnetic flux, and the separation profile of the emerging flux region during its evolution. Results. The computed growth rates for photometric area, magnetic area, and magnetic flux are about twice as high as the respective decay rates. The space-time diagram using HMI magnetograms of five days provides a comprehensive view of growth and decay. It traces a leaf-like structure, which is determined by the initial separation of the two polarities, a rapid expansion phase, a time when the spread stalls, and a period when the region slowly shrinks again. The separation rate of 0.26 km s(-1) is highest in the initial stage, and it decreases when the separation comes to a halt. Horizontal plasma velocities computed at four evolutionary stages indicate a changing pattern of inflows. In LCT maps we find persistent flow patterns such as outward motions in the outer part of the two major pores, a diverging feature near the trailing pore marking the site of upwelling plasma and flux emergence, and low velocities in the interior of dark pores. We detected many elongated rapidly expanding granules between the two major polarities, with dimensions twice as large as the normal granules. KW - Sun: photosphere KW - Sun: magnetic fields KW - techniques: image processing KW - methods: data analysis Y1 - 2016 U6 - https://doi.org/10.1051/0004-6361/201628380 SN - 1432-0746 VL - 596 PB - EDP Sciences CY - Les Ulis ER - TY - JOUR A1 - Gonzalez Manrique, Sergio Javier A1 - Kuckein, Christoph A1 - Pastor Yabar, A. A1 - Collados Vera, M. A1 - Denker, Carsten A1 - Fischer, C. E. A1 - Gömöry, P. A1 - Diercke, Andrea A1 - Gonzalez, N. Bello A1 - Schlichenmaier, R. A1 - Balthasar, H. A1 - Berkefeld, T. A1 - Feller, A. A1 - Hoch, S. A1 - Hofmann, A. A1 - Kneer, F. A1 - Lagg, A. A1 - Nicklas, H. A1 - Orozco Suarez, D. A1 - Schmidt, D. A1 - Schmidt, W. A1 - Sigwarth, M. A1 - Sobotka, M. A1 - Solanki, S. K. A1 - Soltau, D. A1 - Staude, J. A1 - Strassmeier, Klaus G. A1 - Verma, Meetu A1 - Volkmer, R. A1 - von der Lühe, O. A1 - Waldmann, T. T1 - Fitting peculiar spectral profiles in He I 10830 angstrom absorption features JF - Astronomische Nachrichten = Astronomical notes N2 - The new generation of solar instruments provides better spectral, spatial, and temporal resolution for a better understanding of the physical processes that take place on the Sun. Multiple-component profiles are more commonly observed with these instruments. Particularly, the He i 10830 triplet presents such peculiar spectral profiles, which give information on the velocity and magnetic fine structure of the upper chromosphere. The purpose of this investigation is to describe a technique to efficiently fit the two blended components of the He i 10830 triplet, which are commonly observed when two atmospheric components are located within the same resolution element. The observations used in this study were taken on 2015 April 17 with the very fast spectroscopic mode of the GREGOR Infrared Spectrograph (GRIS) attached to the 1.5-m GREGOR solar telescope, located at the Observatorio del Teide, Tenerife, Spain. We apply a double-Lorentzian fitting technique using Levenberg-Marquardt least-squares minimization. This technique is very simple and much faster than inversion codes. Line-of-sight Doppler velocities can be inferred for a whole map of pixels within just a few minutes. Our results show sub-and supersonic downflow velocities of up to 32 km s(-1) for the fast component in the vicinity of footpoints of filamentary structures. The slow component presents velocities close to rest. (C) 2016 WILEY-VCH Verlag GmbH& Co. KGaA, Weinheim KW - Sun: chromosphere KW - methods: data analysis KW - techniques: spectroscopic KW - line: profiles Y1 - 2016 U6 - https://doi.org/10.1002/asna.201512433 SN - 0004-6337 SN - 1521-3994 VL - 337 SP - 1057 EP - 1063 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Verma, Meetu A1 - Denker, Carsten A1 - Böhm, F. A1 - Balthasar, H. A1 - Fischer, C. E. A1 - Kuckein, Christoph A1 - Gonzalez, N. Bello A1 - Berkefeld, T. A1 - Collados Vera, M. A1 - Diercke, Andrea A1 - Feller, A. A1 - Gonzalez Manrique, Sergio Javier A1 - Hofmann, A. A1 - Lagg, A. A1 - Nicklas, H. A1 - Orozco Suarez, D. A1 - Pator Yabar, A. A1 - Rezaei, R. A1 - Schlichenmaier, R. A1 - Schmidt, D. A1 - Schmidt, W. A1 - Sigwarth, M. A1 - Sobotka, M. A1 - Solanki, S. K. A1 - Soltau, D. A1 - Staude, J. A1 - Strassmeier, Klaus G. A1 - Volkmer, R. A1 - von der Lühe, O. A1 - Waldmann, T. T1 - Flow and magnetic field properties in the trailing sunspots of active region NOAA 12396 JF - Astronomische Nachrichten = Astronomical notes N2 - Improved measurements of the photospheric and chromospheric three-dimensional magnetic and flow fields are crucial for a precise determination of the origin and evolution of active regions. We present an illustrative sample of multi-instrument data acquired during a two-week coordinated observing campaign in August 2015 involving, among others, the GREGOR solar telescope (imaging and near-infrared spectroscopy) and the space missions Solar Dynamics Observatory (SDO) and Interface Region Imaging Spectrograph (IRIS). The observations focused on the trailing part of active region NOAA 12396 with complex polarity inversion lines and strong intrusions of opposite polarity flux. The GREGOR Infrared Spectrograph (GRIS) provided Stokes IQUV spectral profiles in the photospheric Si i.1082.7 nm line, the chromospheric He I lambda 1083.0 nm triplet, and the photospheric Ca I lambda 1083.9 nm line. Carefully calibrated GRIS scans of the active region provided maps of Doppler velocity and magnetic field at different atmospheric heights. We compare quick-look maps with those obtained with the " Stokes Inversions based on Response functions" (SIR) code, which furnishes deeper insight into the magnetic properties of the region. We find supporting evidence that newly emerging flux and intruding opposite polarity flux are hampering the formation of penumbrae, i.e., a penumbra fully surrounding a sunspot is only expected after cessation of flux emergence in proximity to the sunspots. (C) 2016 WILEY-VCH Verlag GmbH& Co.KGaA, Weinheim KW - Sun: magnetic fields KW - sunspots KW - methods: data analysis KW - techniques: polarimetric KW - techniques: spectroscopic Y1 - 2016 U6 - https://doi.org/10.1002/asna.201612447 SN - 0004-6337 SN - 1521-3994 VL - 337 SP - 1090 EP - 1098 PB - Wiley-VCH CY - Weinheim ER - TY - BOOK A1 - Andrea, Almut A1 - Kiesant, Knut A1 - Palm, Mathias A1 - Schmidt, Bernhard T1 - Adel verpflichtet - Johann Georg III. von Ribbeck (1639 - 1703) zum 300. Todestag : Beiträge zum Kolloquium in Groß Glienicke 2003 T3 - Die Thurneysser-Reihe : Aus Berlin-Brandenburgs Geschichte Y1 - 2007 SN - 3-939176-27-3 VL - 2 PB - Leonhard-Thurneysser-Verl. CY - Berlin [u.a.] ER - TY - JOUR A1 - Schröder, Astrid A1 - Grimm, Angela A1 - Schulz, Petra A1 - Heide, Judith A1 - Frank, Ulrike A1 - Wahl, Michael A1 - Lampe, Leonie A1 - Fieder, Nora A1 - Krajenbrink, Trudy A1 - Nickels, Lyndsey A1 - Bykova, Ksenia A1 - Wilzek, Alexa A1 - van den Engl-Hoek, Lenie A1 - Huckabee, Maggie-Lee A1 - Balzer, Julia A1 - Ebert, Susanne A1 - Kaps, Hella A1 - Matteschk, Maria A1 - Tzschöckel, Katharina Andrea A1 - Dressel, Katharina A1 - Kröger, Bernd J. A1 - Diwoky, Laura Cassandra A1 - Breitenstein, Sarah A1 - Bruno, Giulia A1 - Lassotta, Romy A1 - Adani, Flavia A1 - Ferchland, Lisa A1 - Baatz, Charlotte A1 - Netzebandt, Jonka A1 - Heyde, Cornelia J. A1 - Cleland, Joanne A1 - Scobbie, James M. A1 - Roxburgh, Zoe A1 - Schmidt, Jessica ED - Adelt, Anne ED - Yetim, Özlem ED - Otto, Constanze ED - Fritzsche, Tom T1 - Spektrum Patholinguistik Band 10. Schwerpunktthema: Panorama Patholinguistik: Sprachwissenschaft trifft Sprachtherapie N2 - Das 10. Herbsttreffen Patholinguistik mit dem Schwerpunktthema »Panorama Patholinguistik: Sprachwissenschaft trifft Sprachtherapie« fand am 19.11.2016 in Potsdam statt. Das Herbsttreffen wird seit 2007 jährlich vom Verband für Patholinguistik e.V. (vpl) durchgeführt. Der vorliegende Tagungsband beinhaltet die vier Hauptvorträge zum Schwerpunktthema sowie Beiträge zu den Kurzvorträgen »Patholinguistik im Fokus« und der Posterpräsentationen zu weiteren Themen aus der sprachtherapeutischen Forschung und Praxis. N2 - The Tenth Autumn Meeting Patholinguistics (Herbsttreffen Patholinguistik) with its main topic »Panorama Patholinguistics: Linguistics meets speech/language therapy« took place in Potsdam on November 19 2016. This annual meeting has been organised since 2007 by the Association for Patholinguistics (Verband für Patholinguistik e.V./vpl). The present proceedings contain the four keynote talks on the main topic as well as contributions from the short talks in the section »Patholinguistics in Focus« and from the poster session covering a broad range of areas in speech/language therapy research and practice. T3 - Spektrum Patholinguistik - 10 KW - Patholinguistik KW - Sprachtherapie KW - Spracherwerb KW - Aphasie KW - Schluckstörungen KW - Lese-Rechtschreibschwierigkeiten KW - patholinguistics KW - speech/language therapy KW - language acquisition KW - ahasia KW - dysphagia KW - dyslexia Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-397019 SN - 978-3-86956-404-3 SN - 1866-9085 SN - 1866-9433 IS - 10 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - THES A1 - Schmidt, Andrea T1 - Der Beitrag der Immunhistochemie zum histopathologischen Grading beim Mammakarzinom Y1 - 1994 ER - TY - JOUR A1 - Mueller, K. A1 - Raila, Jens A1 - Altenkamp, Rainer A1 - Schmidt, D. A1 - Dietrich, R. A1 - Hurtienne, Andrea A1 - Wink, M. A1 - Krone, O. A1 - Brunnberg, Leo A1 - Schweigert, Florian J. T1 - Concentrations of retinol, 3,4-didehydroretinol, and retinyl esters in plasma of free-ranging birds of prey JF - Journal of animal physiology and animal nutrition N2 - This study investigated vitamin A compounds in the plasma of healthy free-ranging Central European raptors with different feeding strategies. Plasma samples of nestlings of white-tailed sea eagle [white-tailed sea eagle (WTSE), Haliaeetus albicilla) (n = 32), osprey (Pandion haliaetus) (n = 39), northern goshawk (Accipiter gentilis) (n = 25), common buzzard (Buteo buteo) (n = 31), and honey buzzard (Pernis apivorus) (n = 18) and adults of WTSE (n = 10), osprey (n = 31), and northern goshawk (n = 45) were investigated with reversed-phase-high-performance liquid chromatography (RP-HPLC). In WTSE, northern goshawks and common buzzards retinol were the main plasma component of vitamin A, whilst in ospreys and honey buzzards, 3,4-didehydroretinol predominated. The median of the retinol plasma concentration in the nestlings group ranged from 0.12 to 3.80 mu M and in the adult group from 0.15 to 6.13 mu M. Median plasma concentrations of 3,4-didehydroretinol in nestlings ranged from 0.06 to 3.55 mu M. In adults, northern goshawks had the lowest plasma concentration of 3,4-didehydroretinol followed by WTSE and ospreys. The plasma of all investigated species contained retinyl esters (palmitate, oleate, and stearate). The results show considerable species-specific differences in the vitamin A plasma concentrations that might be caused by different nutrition strategies. KW - birds of prey KW - plasma KW - retinol KW - 3,4-didehydroretinol KW - retinyl esters Y1 - 2012 U6 - https://doi.org/10.1111/j.1439-0396.2011.01219.x SN - 0931-2439 VL - 96 IS - 6 SP - 1044 EP - 1053 PB - Wiley-Blackwell CY - Hoboken ER - TY - JOUR A1 - Müller, Kerstin E. A1 - Altenkamp, Rainer A1 - Raila, Jens A1 - Schmidt, Daniel A1 - Dietrich, Robert A1 - Hurtienne, Andrea A1 - Wink, Michael A1 - Krone, Oliver A1 - Brunnberg, Leo A1 - Schweigert, Florian J. T1 - Plasma concentration of alpha-tocopherol in different free-ranging birds of prey JF - European journal of wildlife research N2 - In this study, we investigated the alpha-tocopherol plasma concentrations in healthy free-ranging nestlings of the white-tailed sea eagle (Haliaeetus albicilla) (n=32), osprey (Pandion haliaetus) (n=39), northern goshawk (Accipiter gentilis) (n=25), common buzzard (Buteo buteo) (n=31), and honey buzzard (Pernis apivorus) (n=18) as well as of free-ranging adults of the white-tailed sea eagle (n=10), osprey (n=31), and northern goshawk (n=45). alpha-Tocopherol plasma concentrations were determined by reverse-phase high-performance liquid chromatography. alpha-Tocopherol plasma concentrations in nestlings of osprey, white-tailed sea eagle, and northern goshawk did not differ significantly amongst the species, but the common buzzard and honey buzzard nestlings had significantly lower alpha-tocopherol plasma concentrations than nestlings of the other species (both P<0.001). Adult male ospreys and white-tailed sea eagles had significantly higher alpha-tocopherol concentrations compared to adult females (both P<0.005). Adult ospreys and northern goshawks had significantly higher alpha-tocopherol plasma concentrations compared to their nestlings (both P<0.001). In adult female northern goshawks, plasma concentrations of alpha-tocopherol increased significantly before egg laying (P<0.001). These results demonstrate alpha-tocopherol plasma concentrations in birds of prey to be species specific and influenced by age and reproductive status. KW - alpha-Tocopherol KW - Birds of prey KW - Plasma concentration Y1 - 2011 U6 - https://doi.org/10.1007/s10344-011-0516-z SN - 1612-4642 VL - 57 IS - 5 SP - 1043 EP - 1049 PB - Springer CY - New York ER - TY - JOUR A1 - Ramezani Ziarani, Maryam A1 - Bookhagen, Bodo A1 - Schmidt, Torsten A1 - Wickert, Jens A1 - de la Torre, Alejandro A1 - Deng, Zhiguo A1 - Calori, Andrea T1 - A model for the relationship between rainfall, GNSS-derived integrated water vapour, and CAPE in the eastern central Andes JF - Remote Sensing N2 - Atmospheric water vapour content is a key variable that controls the development of deep convective storms and rainfall extremes over the central Andes. Direct measurements of water vapour are challenging; however, recent developments in microwave processing allow the use of phase delays from L-band radar to measure the water vapour content throughout the atmosphere: Global Navigation Satellite System (GNSS)-based integrated water vapour (IWV) monitoring shows promising results to measure vertically integrated water vapour at high temporal resolutions. Previous works also identified convective available potential energy (CAPE) as a key climatic variable for the formation of deep convective storms and rainfall in the central Andes. Our analysis relies on GNSS data from the Argentine Continuous Satellite Monitoring Network, Red Argentina de Monitoreo Satelital Continuo (RAMSAC) network from 1999 to 2013. CAPE is derived from version 2.0 of the ECMWF’s (European Centre for Medium-Range Weather Forecasts) Re-Analysis (ERA-interim) and rainfall from the TRMM (Tropical Rainfall Measuring Mission) product. In this study, we first analyse the rainfall characteristics of two GNSS-IWV stations by comparing their complementary cumulative distribution function (CCDF). Second, we separately derive the relation between rainfall vs. CAPE and GNSS-IWV. Based on our distribution fitting analysis, we observe an exponential relation of rainfall to GNSS-IWV. In contrast, we report a power-law relationship between the daily mean value of rainfall and CAPE at the GNSS-IWV station locations in the eastern central Andes that is close to the theoretical relationship based on parcel theory. Third, we generate a joint regression model through a multivariable regression analysis using CAPE and GNSS-IWV to explain the contribution of both variables in the presence of each other to extreme rainfall during the austral summer season. We found that rainfall can be characterised with a higher statistical significance for higher rainfall quantiles, e.g., the 0.9 quantile based on goodness-of-fit criterion for quantile regression. We observed different contributions of CAPE and GNSS-IWV to rainfall for each station for the 0.9 quantile. Fourth, we identify the temporal relation between extreme rainfall (the 90th, 95th, and 99th percentiles) and both GNSS-IWV and CAPE at 6 h time steps. We observed an increase before the rainfall event and at the time of peak rainfall—both for GNSS-integrated water vapour and CAPE. We show higher values of CAPE and GNSS-IWV for higher rainfall percentiles (99th and 95th percentiles) compared to the 90th percentile at a 6-h temporal scale. Based on our correlation analyses and the dynamics of the time series, we show that both GNSS-IWV and CAPE had comparable magnitudes, and we argue to consider both climatic variables when investigating their effect on rainfall extremes. KW - Global Navigation Satellite System (GNSS) KW - GNSS-integrated water vapour KW - convective available potential energy (CAPE) KW - extreme rainfall KW - TRMM Y1 - 2021 U6 - https://doi.org/10.3390/rs13183788 SN - 2072-4292 VL - 13 IS - 18 PB - MDPI CY - Basel ER - TY - GEN A1 - Ramezani Ziarani, Maryam A1 - Bookhagen, Bodo A1 - Schmidt, Torsten A1 - Wickert, Jens A1 - de la Torre, Alejandro A1 - Deng, Zhiguo A1 - Calori, Andrea T1 - A model for the relationship between rainfall, GNSS-derived integrated water vapour, and CAPE in the eastern central Andes T2 - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe N2 - Atmospheric water vapour content is a key variable that controls the development of deep convective storms and rainfall extremes over the central Andes. Direct measurements of water vapour are challenging; however, recent developments in microwave processing allow the use of phase delays from L-band radar to measure the water vapour content throughout the atmosphere: Global Navigation Satellite System (GNSS)-based integrated water vapour (IWV) monitoring shows promising results to measure vertically integrated water vapour at high temporal resolutions. Previous works also identified convective available potential energy (CAPE) as a key climatic variable for the formation of deep convective storms and rainfall in the central Andes. Our analysis relies on GNSS data from the Argentine Continuous Satellite Monitoring Network, Red Argentina de Monitoreo Satelital Continuo (RAMSAC) network from 1999 to 2013. CAPE is derived from version 2.0 of the ECMWF’s (European Centre for Medium-Range Weather Forecasts) Re-Analysis (ERA-interim) and rainfall from the TRMM (Tropical Rainfall Measuring Mission) product. In this study, we first analyse the rainfall characteristics of two GNSS-IWV stations by comparing their complementary cumulative distribution function (CCDF). Second, we separately derive the relation between rainfall vs. CAPE and GNSS-IWV. Based on our distribution fitting analysis, we observe an exponential relation of rainfall to GNSS-IWV. In contrast, we report a power-law relationship between the daily mean value of rainfall and CAPE at the GNSS-IWV station locations in the eastern central Andes that is close to the theoretical relationship based on parcel theory. Third, we generate a joint regression model through a multivariable regression analysis using CAPE and GNSS-IWV to explain the contribution of both variables in the presence of each other to extreme rainfall during the austral summer season. We found that rainfall can be characterised with a higher statistical significance for higher rainfall quantiles, e.g., the 0.9 quantile based on goodness-of-fit criterion for quantile regression. We observed different contributions of CAPE and GNSS-IWV to rainfall for each station for the 0.9 quantile. Fourth, we identify the temporal relation between extreme rainfall (the 90th, 95th, and 99th percentiles) and both GNSS-IWV and CAPE at 6 h time steps. We observed an increase before the rainfall event and at the time of peak rainfall—both for GNSS-integrated water vapour and CAPE. We show higher values of CAPE and GNSS-IWV for higher rainfall percentiles (99th and 95th percentiles) compared to the 90th percentile at a 6-h temporal scale. Based on our correlation analyses and the dynamics of the time series, we show that both GNSS-IWV and CAPE had comparable magnitudes, and we argue to consider both climatic variables when investigating their effect on rainfall extremes. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1172 KW - Global Navigation Satellite System (GNSS) KW - GNSS-integrated water vapour KW - convective available potential energy (CAPE) KW - extreme rainfall KW - TRMM Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-523256 SN - 1866-8372 IS - 1172 ER -