@article{MTMT:33071926, title = {Local temperature calibration of carbonate-water oxygen isotope fractionation and clumped isotopes (?47) in a karstic freshwater limestone environment}, url = {https://m2.mtmt.hu/api/publication/33071926}, author = {Palcsu, László and Túri, Marianna and Futó, István and Kovács, János and Szabó, Péter and Orsovszki, Judit and Temovski, Marjan and Rinyu, László}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {21}, unique-id = {33071926}, issn = {1029-7006}, abstract = {Oxygen isotope ratios of carbonates are widely used as palaeoclimate indicators since isotope fractionation between the carbonate and the water phase is temperature dependent. The available empirical equationsare reliable for deposits which are precipitated under isotopic equilibrium. However, in many cases, precipitation of abiotic carbonate sediments (flowstones, freshwater limestones, travertines, tufas, etc.) can occur with fast CO2 degassing, which tends to result in a kinetic fractionation of isotope compositions. In karst environments, freshwater limestone is precipitated from cold spring waters as the creek is flowing and the dissolved CO2 is released from the water. This process creates tufa deposits. Our aim is to investigate the suitability of the tufa deposits as a palaeoclimate archive, even if kinetic fractionation plays a significant role during carbonate formation. In Mecsek Mts, Hungary, tufa deposits can be found in karst valleys. We have chosen a karst spring of constant annual temperature of 10.3 ?C. As the water is flowing away from the spring, it is heated up or cooled down by the ambient air, so the annual temperature variation is increasing with the distance from the spring. In 2015, glass plates, as well as temperature loggers, were placed in the water downstream from the spring along with a 200 m long section, so that carbonate could be precipitated onto the glass surface. In 3-4 weeks the glass plates are replaced. Daily average temperatures of the water vary between 0 and 25.6 ?C, while temperatures averaged to the sampling periods vary between 0.8 and 20.1 ?C. The first ? 18Ocarb and clumped isotope results show a significant temperature dependence, although the equations are shifted from those that are reliable to equilibrium circumstances. However, both ? 18Ocarb-T and ?47-T relationships seem to be significant and therefore applicable to the old tufa layers for reconstructing palaeotemperatures.}, year = {2019}, eissn = {1607-7962}, pages = {8493}, orcid-numbers = {Szabó, Péter/0000-0003-0827-3583} } @article{MTMT:31888908, title = {Increasing bed-to-surface transfer of topographical variations affects the distribution of surface lakes on the Greenland Ice Sheet after 2100}, url = {https://m2.mtmt.hu/api/publication/31888908}, author = {Ignéczi, Ádám and Sole, Andrew and Livingstone, Stephen and Ng, Felix and Clark, Chris}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {21}, unique-id = {31888908}, issn = {1029-7006}, year = {2019}, eissn = {1607-7962}, orcid-numbers = {Ignéczi, Ádám/0000-0003-1529-8383} } @article{MTMT:31373161, title = {Mineralogy and nano-structure of modern dolomite in Lake Neusiedl, Austria}, url = {https://m2.mtmt.hu/api/publication/31373161}, author = {Meister, P and Pósfai, Mihály and Pekker, Péter and Molnár, Zsombor and Neuhuber, S and Demény, Attila and Gieger, S and Frisia, S}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {21}, unique-id = {31373161}, issn = {1029-7006}, year = {2019}, eissn = {1607-7962}, orcid-numbers = {Pósfai, Mihály/0000-0001-9355-3533; Pekker, Péter/0000-0002-0463-0742; Molnár, Zsombor/0000-0002-9836-3488; Demény, Attila/0000-0003-0522-9018} } @article{MTMT:31364898, title = {Oxygen isotope ratio measurements on bioapatite samples prepared from mammal tissues: method development at ICER Centre}, url = {https://m2.mtmt.hu/api/publication/31364898}, author = {Kiss, Gabriella Ilona and Túri, Marianna and Futó, István and Kovács, János and Szabó, Péter and Palcsu, László}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {21}, unique-id = {31364898}, issn = {1029-7006}, year = {2019}, eissn = {1607-7962}, orcid-numbers = {Kovács, János/0000-0001-7742-5515; Szabó, Péter/0000-0003-0827-3583} } @article{MTMT:31286066, title = {Geochemical and physical changes of CEM I and II cement paste samples treated in acetic acid solutions of pure or simulated granitic pore wCEM I and IIater}, url = {https://m2.mtmt.hu/api/publication/31286066}, author = {Szabó-Krausz, Zsuzsanna and Kósa, Zsuzsanna and Török, Ákos and Szabó, Csaba and Falus, György}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {21}, unique-id = {31286066}, issn = {1029-7006}, keywords = {Acetic Acid; Physical changes; geochemical changes; CEM I and II}, year = {2019}, eissn = {1607-7962}, orcid-numbers = {Szabó-Krausz, Zsuzsanna/0000-0002-4454-8700; Kósa, Zsuzsanna/0000-0001-7142-903X; Török, Ákos/0000-0002-5394-4510; Szabó, Csaba/0000-0002-1580-6344} } @article{MTMT:31177143, title = {Inversion of ducted VLF transmitter signals observed in the plasmasphere}, url = {https://m2.mtmt.hu/api/publication/31177143}, author = {Koronczay, Dávid and Lichtenberger, János and Hospodarsky, G.}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {21}, unique-id = {31177143}, issn = {1029-7006}, year = {2019}, eissn = {1607-7962}, orcid-numbers = {Koronczay, Dávid/0000-0001-5733-6021; Lichtenberger, János/0000-0001-9175-9255} } @article{MTMT:30944635, title = {Traces of the Late Eocene – Early Oligocene volcanic activity in the Buda Hills (Transdanubian Range, Hungary): link to the volcanism along the Periadriatic – Mid-Hungarian – Sava-Vardar zone}, url = {https://m2.mtmt.hu/api/publication/30944635}, author = {Farics, Éva and Dunkl, I. and Józsa, Sándor and Haas, János and Kovács, János}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {21}, unique-id = {30944635}, issn = {1029-7006}, year = {2019}, eissn = {1607-7962}, orcid-numbers = {Józsa, Sándor/0000-0001-8219-0044; Haas, János/0000-0003-0929-8889; Kovács, János/0000-0001-7742-5515} } @article{MTMT:30927812, title = {Assessing flare productivity from sunspot data}, url = {https://m2.mtmt.hu/api/publication/30927812}, author = {Ludmány, András and Baranyi, Tünde and Muraközy, Judit}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {21}, unique-id = {30927812}, issn = {1029-7006}, abstract = {The solar flare forecast techniques are usually based on magnetogram data, they mostly consider a solar active region as a whole an disregard its temporal variation. These techniques are also applicabl to sunspot data but besides the global treatment the most detaile Debrecen sunspot databases make also possible to scrutinize the interna structure and dynamics of the solar active regions. This means th identification of the subdomains of strongest horizontal gradients o the magnetic field and to track them with a temporal resolution of 1. hours. The detailed data allow to make flare forecast for different tim periods ahead, i.e. for the next couple of hours and days and with lowe reliability for the next rotation. These procedures make possible versatile system of flare forecast techniques. The program is supporte by ESA.}, year = {2019}, eissn = {1607-7962}, orcid-numbers = {Muraközy, Judit/0000-0001-6920-259X} } @article{MTMT:30923523, title = {Twisted flux rope interactions in the solar wind}, url = {https://m2.mtmt.hu/api/publication/30923523}, author = {Vörös, Zoltán and E., Yordanova}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {21}, unique-id = {30923523}, issn = {1029-7006}, year = {2019}, eissn = {1607-7962} } @article{MTMT:30917094, title = {Stellar CMEs from an observational point of view}, url = {https://m2.mtmt.hu/api/publication/30917094}, author = {Leitzinger, Martin and Odert, Petra and Vida, Krisztián and Koller, Florian and Veronig, Astrid and Korhonen, Heidi and Guenther, Eike and Hanslmeier, Arnold and Temmer, Manuela and Dissauer, Karin and Greimel, Robert and Kriskovics, Levente and Lammer, Helmut}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {21}, unique-id = {30917094}, issn = {1029-7006}, abstract = {Stellar activity is mainly characterized by the high energy phenomena such as outbreaks of radiation (flares) and sporadic expulsions o particles into the astrosphere termed coronal mass ejections (CMEs) Both phenomena are known to cause space weather in our solar system. O stars, flares and their parameters are well determined, in contrast t CMEs; their parameters are still not determined statistically. Bot phenomena may have severe effects on planetary atmospheres and, i addition, stellar CMEs may play an important role in stellar mass an angular momentum loss and therefore in stellar evolution. Flares ar directly detectable from photometric observations, whereas the detectio of CMEs requires different observational methods. CMEs have differen signatures in different wavelength regimes. Most of the stellar CME were detected so far using the method of Doppler-shifted Balmer flu which is accessible via spectroscopic measurements. Severa observational programs have been carried out and are planned for th future, including new observations and archival data. Also severa attempts to detect stellar CMEs via radio emission have been carried ou in the past decades. Finally, the X-ray regime may provide a valuabl data pool to look for so-called dimmings, well-known from the Sun, whic are closely related to CMEs and which are detectable in X-ray ligh curves. So far stellar CMEs have been detected rarely and only a handfu of distinct events is known, mainly for dMe stars. We report on past ongoing and future campaigns of stellar CMEs on F-, G-, K-, and M-typ pre- and main-sequence stars.}, year = {2019}, eissn = {1607-7962}, pages = {EGU2019-6786} }