Výsledky vyhledávání - "Rutgers v. d. Loeff, Michiel"

Dating Deep-Sea Sediments with 230Th-Excess

Autor: Geibert, Walter, Stimac, Ingrid, Rutgers v. d. Loeff, Michiel, Kuhn, Gerhard

Publikováno v: EPIC3Goldschmidt Conference 2019, Barcelona, 2019-08-18-2019-08-23Barcelona

We present a dating method for deep-sea sediments that is independent from the presence of microfossils, carbonates or ash layers. In analogy to the constant-rate-of-supply (CRS) model for excess 210Pb, we use the natural radionuclide 230Th (half-lif

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______999::5975ada9ba34e9d89178b9d8b89dc29e
https://hdl.handle.net/10013/epic.b4184af9-cb9e-4343-85c7-6a0090f80b53

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The moisture effect on 223Ra and 224Ra measurements using Mn-cartridges

Autor: Paiva, Mariele, Rutgers v. d. Loeff, Michiel

Publikováno v: EPIC3Goldschmidt Conference, Paris, 2017-08-13-2017-08-18

Important processes in the ocean can be evaluated with radioactive nuclides, including radium isotopes. An approach for quantifying radium isotopes in seawater with in-situ pumps has been developed in advance of the GEOTRACES program [1]. Precise mea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______999::39c4e7de8d11f62bd341437dcde13cfe
https://hdl.handle.net/10013/epic.51633

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231Pa and 230Th in the Arctic Ocean 1991-2015: Changes in the Eurasian and Makarov Basins

Autor: Valk, Ole, Gdaniec, Sandra, Rutgers v. d. Loeff, Michiel, Geibert, Walter, Smethie, William, Moran, Bradley, Lepore, Kate, Edwards, Robert, Lu, Yanbin, Rijkenberg, Micha J.A.

Publikováno v: EPIC3Goldschmidt 2017, Paris, 2017-08-13-2017-08-20Paris

230Th and 231Pa are produced in sea water by radioactive decay of Uranium isotopes (234U, 235U). Both are particle reactive and are scavenged onto settling particles. As 230Th is more particle reactive than 231Pa, their distribution in the water colu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______999::f7628a60ada9149ab128b7c38740f18c
https://hdl.handle.net/10013/epic.51653

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Recent Circulation Changes at Intermediate Depths (Upper Polar Deep Water) in the Beaufort Gyre Inferred from Water Column Distribution of 230Th

Autor: Rutgers v. d. Loeff, Michiel, Francois, R., Moran, S. B., Lepore, K., Edwards, R. L., Lu, Yanbin

Publikováno v: EPIC3AGU Ocean Sciences Meeting, New Orleans, 2016-02-21-2016-02-26

Surface water circulation in the Arctic Ocean is known to vary with time in response to the Arctic Oscillation. Clear recent changes have been documented in the freshwater budget (Rabe et al., 2011) and in the penetration of 129I (Karcher et al., 201

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______999::72ccf82c0dabec1811df8bc2a256c24d
https://hdl.handle.net/10013/epic.47418

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Carbon export fluxes and export efficiency in the central Arctic during the record sea-ice minimum in 2012. A joint 234Th/238U and 210Po/210Pb study

Autor: Roca-Martí, Montserrat, Puigcorbé, Viena, Rutgers v. d. Loeff, Michiel, Katlein, Christian, Fernández Méndez, Mar, Peeken, Ilka, Masque, Pere

Publikováno v: EPIC3Journal of Geophysical Research-Oceans, Wiley, 121(7), pp. 5030-5049, ISSN: 0148-0227

The Arctic sea-ice extent amounted to its record minimum to date in September 2012. Sea-ice decline increases the absorption of solar energy in the Arctic Ocean, affecting primary production and plankton community. How this will modulate the sinking

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______999::bc4da67fd1d37b5fa7ce8580a49bc625
https://hdl.handle.net/10013/epic.48556

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GEOTRACES Intercalibration of 230Th, 232Th, 231Pa and prospects for 10Be

Autor: Anderson, R. F., Fleisher, M. Q., Robinson, L. F., Edwards, L. R., Hoff, J. A., Moran, S. B., Rutgers v. d. Loeff, Michiel, Thomas, A., Roy-Barman, M., Francois, R.

Publikováno v: EPIC3Limnology and Oceanography: Methods, 10, pp. 179-213

Nineteen labs representing nine nations participated in the GEOTRACES intercalibration initiative that determined concentrations of 232Th, 230Th, 231Pa or 10Be in seawater, suspended particles or sediments. Results generally demonstrated good agreeme

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______999::5902a7c11a322c280c1d12a21d15393c
https://hdl.handle.net/10013/epic.39150

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Shelf-basin exchange times of Arctic surface waters estimated from 228Th/228Ra disequilibrium

Autor: Rutgers v. d. Loeff, Michiel, Cai, Pinghe, Stimac, Ingrid, Bauch, D., Hanfland, Claudia, Roeske, Tobias, Moran, S. B.

Publikováno v: Journal of Geophysical Research: Oceans, 117 (C3). C03024.
EPIC3Journal of Geophysical Research-Oceans., 117(C03024)

The Trans Polar Drift is strongly enriched in 228Ra accumulated on the wide Arctic shelves with subsequent rapid off-shore transport. We present new data of Polarstern expeditions to the central Arctic and to the Kara and Laptev Seas. Because 226Ra a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::997f96dd4712fd8081f704db05fa35c5
http://oceanrep.geomar.de/14071/

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Distribution of 230Thxs and 231Paxs in sediment particle classes of opal-rich and carbonate-rich sediments

Autor: Kretschmer, Sven, Kusch, Stephanie, Geibert, W., Rutgers v. d. Loeff, Michiel, Mollenhauer, Gesine

Publikováno v: EPIC3European Geoscience Union, General Assembly 2009.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______999::03542767a944aa47c1e007e796e1d54c
https://hdl.handle.net/10013/epic.32543

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Distribution of 230Th, 10Be and 231Pa in sediment particle classes

Autor: Kretschmer, Sven, Geibert, W., Schnabel, C., Rutgers v. d. Loeff, Michiel, Mollenhauer, Gesine

Publikováno v: EPIC318. Annual V.M. Goldschmidt Conference, July 13th-18th 2008, Vancouver, Canada.

The 230Thxs-normalization method is a widely used tool for the calculation of vertical fluxes to marine sediments, correcting for the influence of lateral sediment transport. However, the strong particle surface reactivity of thorium may lead to a gr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______999::ec0e7ab86e95b64a41ec18a9d4c741bd
https://hdl.handle.net/10013/epic.30921

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Silica accumulation rates in surface sediments of the Southern Ocean corrected for sediment redistribution

Autor: Geibert, W., Rutgers v. d. Loeff, Michiel, Usbeck, Regina, Gersonde, Rainer, Kuhn, Gerhard, Seeberg-Elverfeldt, J.

Publikováno v: EPIC3presentation at EGU Wien.-29. April 2005., 25

Sediment redistribution at the seafloor is a widespread process in marine environments. In the last years, increasing evidence has been found that sedimentary budgets for silica and other components may be strongly biased by sediment focussing. The n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______999::695c0bd2ec49a054d8640fe554814834
https://hdl.handle.net/10013/epic.22310

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