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97 results on '"Hruska, Jakub"'

5. Mg, Ca and Sr isotope dynamics in a small forested catchment underlain by paragneiss: The role of geogenic, atmospheric, and biogenic sources of base cations

Author

Novak, Martin, Holmden, Chris, Andronikov, Alexandre V., Erban Kochergina, Yulia V., Kirchner, James W., Paces, Tomas, Kachlik, Vaclav, Veselovsky, Frantisek, Hruška, Jakub, Laufek, Frantisek, Koubova, Magdalena, Stepanova, Marketa, Prechova, Eva, Sebek, Ondrej, Curik, Jan, Tesar, Miroslav, Fottova, Daniela, Andronikova, Irina E., and Komarek, Arnost

Published
2024
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8. Observed and expected changes in wildfire-conducive weather and fire events in peri-urban zones and key nature reserves of the Czech Republic

Author

Trnka, Mirek, Balek, Jan, Možný, Martin, Cienciala, Emil, Čermák, Petr, Semerádová, Daniela, Jurečka, František, Hlavinka, Petr, Štěpánek, Petr, Farda, Aleš, Skalák, Petr, Beranová, Jana, Chuchma, Filip, Zahradníček, Pavel, Janouš, Dalibor, Žalud, Zdeněk, Dubrovský, Martin, Kindlmann, Pavel, Křenová, Zdeňka, Fischer, Milan, Hruška, Jakub, and Brázdil, Rudolf

Published
2020

22. Magic Modeling of Long-Term Lake Water and Soil Chemistry at Abborrträsket, Northern Sweden

Author

Krám, Pavel, Laudon, Hjalmar, Bishop, Kevin, Rapp, Lars, Hruška, Jakub, Satake, Kenichi, editor, Shindo, Junko, editor, Takamatsu, Takejiro, editor, Nakano, Takanori, editor, Aoki, Shigeru, editor, Fukuyama, Tsutomu, editor, Hatakeyama, Shiro, editor, Ikuta, Kazukamasa, editor, Kawashima, Munetsugu, editor, Kohno, Yoshihisa, editor, Kojima, Satoru, editor, Murano, Kentaro, editor, Okita, Toshiichi, editor, Taoda, Hiroshi, editor, Tsunoda, Kinichi, editor, and Tsurumi, Makoto, editor

Published
2001
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23. Relationship Between Norway Spruce Status and Soil Water Base Cations/Aluminum Ratios in the Czech Republic

Author

Hruška, Jakub, Cudlín, Pavel, Krám, Pavel, Satake, Kenichi, editor, Shindo, Junko, editor, Takamatsu, Takejiro, editor, Nakano, Takanori, editor, Aoki, Shigeru, editor, Fukuyama, Tsutomu, editor, Hatakeyama, Shiro, editor, Ikuta, Kazukamasa, editor, Kawashima, Munetsugu, editor, Kohno, Yoshihisa, editor, Kojima, Satoru, editor, Murano, Kentaro, editor, Okita, Toshiichi, editor, Taoda, Hiroshi, editor, Tsunoda, Kinichi, editor, and Tsurumi, Makoto, editor

Published
2001
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35. Catchment Runoff in Industrial Areas Exports Legacy Pollutant Zinc from the Topsoil Rather than Geogenic Zn

Author

Andronikov, Alexandre V., primary, Novak, Martin, additional, Oulehle, Filip, additional, Chrastny, Vladislav, additional, Sebek, Ondrej, additional, Andronikova, Irina E., additional, Stepanova, Marketa, additional, Sipkova, Adela, additional, Hruska, Jakub, additional, Myska, Oldrich, additional, Chuman, Tomas, additional, Veselovsky, Frantisek, additional, Curik, Jan, additional, Prechova, Eva, additional, and Komarek, Arnost, additional

Published
2021
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38. Controls on δ26Mg variability in three Central European headwater catchments characterized by contrasting bedrock chemistry and contrasting inputs of atmospheric pollutants

Author

Novak, Martin, primary, Farkas, Juraj, additional, Kram, Pavel, additional, Hruska, Jakub, additional, Stepanova, Marketa, additional, Veselovsky, Frantisek, additional, Curik, Jan, additional, Andronikov, Alexandre V., additional, Sebek, Ondrej, additional, Simecek, Martin, additional, Fottova, Daniela, additional, Bohdalkova, Leona, additional, Prechova, Eva, additional, Koubova, Magdalena, additional, and Vitkova, Hyacinta, additional

Published
2020
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39. Magnesium and calcium isotope systematics in a headwater catchment underlain by amphibolite: Constraints on Mg–Ca biogeochemistry in an atmospherically polluted but well-buffered spruce ecosystem (Czech Republic, Central Europe)

Author

Novak, Martin, primary, Holmden, Chris, additional, Farkas, Juraj, additional, Kram, Pavel, additional, Hruska, Jakub, additional, Curik, Jan, additional, Veselovsky, Frantisek, additional, Stepanova, Marketa, additional, Kochergina, Yulia V., additional, Erban, Vojtech, additional, Andronikov, Alexandre, additional, Sebek, Ondrej, additional, Koubova, Magdalena, additional, Bohdalkova, Leona, additional, and Vitkova, Hyacinta, additional

Published
2020
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41. Trends and patterns in surface water chemistry in Europe and North America between 1990 and 2016, with particular focus on changes in land use as a confounding factor for recovery

Author

Garmo, Øyvind Aaberg, Kaste, Øyvind, Arle, Jens, Austnes, Kari, de Wit, Heleen, Fölster, Jens, Houle, Daniel, Hruska, Jakub, Indriksone, Iveta, Monteith, Don, Rogora, Michaela, Sample, James Edward, Steingruber, Sandra, Stoddard, John L., Talkop, Reet, Trodd, Wayne, Ulańczyk, Rafał Piotr, and Vuorenmaa, Jussi

Subjects
Acidification, surface water acidification, ICP Waters, Matematikk og naturvitenskap: 400 [VDP], Mathematics and natural scienses: 400 [VDP], Forsuring, Luftforurensning, Air pollution, Trender, sense organs, Trends, skin and connective tissue diseases
Abstract

Main Author Øyvind Garmo The report presents trends in sulphate, nitrate, chloride, base cations, ANC (acid neutralising capacity), pH and DOC at circa 500 ICP Waters sites in Europe and North America for the period 1990-2016. Time series were analysed for trends in annual median values, annual extreme values and change points, that indicate years with sudden changes in trend or level. Also provided is a brief overview of possible implications of land use change for recovery of acidified surface waters. Norwegian Environment Agency (Miljødirektoratet), United Nations Economic Commission for Europe

Published
2020

44. Regional assessment of the current extent of acidification of surface waters in Europe and North America

Author

Austnes, Kari, Aherne, Julian, Arle, Jens, Čičendajeva, Marina, Couture, Suzanne, Fölster, Jens, Garmo, Øyvind Aaberg, Hruska, Jakub, Monteith, Don, Posch, Max, Rogora, Michaela, Sample, James Edward, Skjelkvåle, Brit Lisa, Steingruber, Sandra, Stoddard, John L., Ulańczyk, Rafał, Van Dam, Herman, Velasco, Manuel Toro, Vuorenmaa, Jussi, Wright, Richard Frederic, and de Wit, Heleen

Subjects
Europe and North America, Matematikk og naturvitenskap: 400 [VDP], Mathematics and natural scienses: 400 [VDP], Forsuring av overflatevann, Luftforurensning, Air pollution, Surface water acidification, Europa og Nord Amerika, Geographical extent, Geografisk utbredelse
Abstract

Project manager Kari Austnes The current status of surface water acidification related to air pollution in Europe and North America has been assessed using country reports, monitoring data, critical loads and exceedance data, acid sensitivity and deposition maps, and data reported under the European Commission’s Water Framework Directive (WFD). Acidification is still observed in many countries, but the extent and severity vary. Maps of acid sensitivity and deposition suggest that surface water acidification is present in regions and countries for which no data or reports were delivered for the current assessment. Existing national monitoring varies in the ability to assess the spatial extent of acidification and the recovery responses of acidified sites. The monitoring requirements under the European Union’s National Emission Ceilings Directive are expected to reverse the recent decline in the number of monitoring sites observed in some countries. The information reported under the WFD is currently of limited value in assessing the extent of acidification of surface waters in Europe. Chemical recovery in response to reductions in acid deposition can be slow, and biological recovery can lag severely behind. Despite large and effective efforts across Europe and North America to reduce surface water acidification, air pollution still constitutes a threat to freshwater ecosystems. Norwegian Environment Agency (Miljødirektoratet) United Nations Economic Commission for Europe (UNECE)

Published
2018

45. Controls on δ26Mg variability in three Central European headwater catchments characterized by contrasting bedrock chemistry and contrasting inputs of atmospheric pollutants.

Author

Novak, Martin, Farkas, Juraj, Kram, Pavel, Hruska, Jakub, Stepanova, Marketa, Veselovsky, Frantisek, Curik, Jan, Andronikov, Alexandre V., Sebek, Ondrej, Simecek, Martin, Fottova, Daniela, Bohdalkova, Leona, Prechova, Eva, Koubova, Magdalena, and Vitkova, Hyacinta

Subjects
BEDROCK, MAGNESIUM isotopes, FOREST declines, POLLUTANTS, INDUSTRIAL pollution, FORESTED wetlands
Abstract

Magnesium isotope ratios (26Mg/24Mg) can provide insights into the origin of Mg pools and fluxes in catchments where Mg sources have distinct isotope compositions, and the direction and magnitude of Mg isotope fractionations are known. Variability in Mg isotope compositions was investigated in three small, spruce-forested catchments in the Czech Republic (Central Europe) situated along an industrial pollution gradient. The following combinations of catchment characteristics were selected for the study: low-Mg bedrock + low Mg deposition (site LYS, underlain by leucogranite); high-Mg bedrock + low Mg deposition (site PLB, underlain by serpentinite), and low-Mg bedrock + high Mg deposition (site UDL, underlain by orthogneiss). UDL, affected by spruce die-back due to acid rain, was the only investigated site where dolomite was applied to mitigate forest decline. The δ26Mg values of 10 catchment compartments were determined on pooled subsamples. At LYS, a wide range of δ26Mg values was observed across the compartments, from -3.38 ‰ (bedrock) to -2.88 ‰ (soil), -1.48% (open-area precipitation), -1.34 ‰ (throughfall), -1.19 ‰ (soil water), -0.99 ‰ (xylem), -0.95 ‰ (needles), -0.82 ‰ (bark), -0.76 ‰ (fine roots), and -0.76 ‰ (runoff). The δ26Mg values at UDL spanned 1.32 ‰ and were thus less variable, compared to LYS. Magnesium at PLB was isotopically relatively homogeneous. The δ26Mg systematics was consistent with geogenic control of runoff Mg at PLB. Mainly atmospheric/biological control of runoff Mg was indicated at UDL, and possibly also at LYS. Our sites did not exhibit the combination of low-δ26Mg runoff and high-δ26Mg weathering products (secondary clay minerals) reported from several previously studied sites. Six years after the end of liming at UDL, Mg derived from dolomite was isotopically undetectable in runoff. [ABSTRACT FROM AUTHOR]

Published
2020
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47. Proceedings of the 29th Task Force meeting of the ICP Waters Programme in Český Krumlov, Czech Republic 1st –3rd October, 2013 (ICP Waters report 117/2014)

Author

de Wit, Heleen, Wathne, Bente Margrethe, Hruska, Jakub, and de Wit, Heleen - Project manager

Subjects
Luftforurensning / Air pollution, Matematikk og naturvitenskap: 400 [VDP], Mathematics and natural scienses: 400 [VDP], Miljøovervåkning / Environmental monitoring, Ferskvann / Freshwater, Internasjonalt samarbeid / International cooperation
Abstract

The report contains Proceedings of the 29th Task Force meeting of the ICP Waters Programme in Český Krumlov, Czech Republic, October 1 – 3, 2013, including national contributions from Armenia, Canada, the Czech Republic, Italy, Norway and Russia and Switzerland Norwegian Environment Agency (Mildir) United Nations Economic Commission for Europe (UNECE)

Published
2014

48. Contrasting vulnerability of drained tropical and high-latitude peatlands to fluvial loss of stored carbon

Author

Evans, Chris D., Page, Susan E., Jones, Tim, Moore, Sam, Gauci, Vincent, Laiho, Raija, Hruska, Jakub, Allott, Tim E.H., Billett, Michael F., Tipping, Ed, Freeman, Chris, Garnett, Mark H., Evans, Chris D., Page, Susan E., Jones, Tim, Moore, Sam, Gauci, Vincent, Laiho, Raija, Hruska, Jakub, Allott, Tim E.H., Billett, Michael F., Tipping, Ed, Freeman, Chris, and Garnett, Mark H.

Abstract

Carbon sequestration and storage in peatlands rely on consistently highwater tables. Anthropogenic pressures including drainage, burning, land conversion for agriculture, timber, and biofuel production, cause loss of peat-forming vegetation and exposure of previously anaerobic peat to aerobic decomposition. This can shift peatlands from net CO2 sinks to large CO2 sources, releasing carbon held for millennia. Peatlands also export significant quantities of carbon via fluvial pathways, mainly as dissolved organic carbon (DOC). We analyzed radiocarbon (14C) levels of DOC in drainage water from multiple peatlands in Europe and Southeast Asia, to infer differences in the age of carbon lost from intact and drained systems. In most cases, drainage led to increased release of older carbon from the peat profile but withmarked differences related to peat type. Very low DOC-14C levels in runoff from drained tropical peatlands indicate loss of very old (centuries to millennia) stored peat carbon. High-latitude peatlands appearmore resilient to drainage; 14Cmeasurements from UK blanket bogs suggest that exported DOC remains young (<50 years) despite drainage. Boreal and temperate fens and raised bogs in Finland and the Czech Republic showed intermediate sensitivity. We attribute observed differences to physical and climatic differences between peatlands, in particular, hydraulic conductivity and temperature, as well as the extent of disturbance associated with drainage, notably land use changes in the tropics. Data from the UK Peak District, an area where air pollution and intensive land management have triggered Sphagnum loss and peat erosion, suggest that additional anthropogenic pressures may trigger fluvial loss of much older (>500 year) carbon in high-latitude systems. Rewetting at least partially offsets drainage effects on DOC age.

Published
2014

49. Assessing Recovery from Acidification of European Surface Waters in the Year 2010: Evaluation of Projections Made with the MAGIC Model in 1995

Author

Helliwell, Rachel C., primary, Wright, Richard F., additional, Jackson-Blake, Leah A., additional, Ferrier, Robert C., additional, Aherne, Julian, additional, Cosby, Bernard J., additional, Evans, Christopher D., additional, Forsius, Martin, additional, Hruska, Jakub, additional, Jenkins, Alan, additional, Kram, Pavel, additional, Kopáček, Jiri, additional, Majer, Vladimir, additional, Moldan, Filip, additional, Posch, Maximilian, additional, Potts, Jacqueline M., additional, Rogora, Michela, additional, and Schöpp, Wolfgang, additional

Published
2014
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