Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Monika Segl"'
Autor:
Christoph Spötl, Christian Mühlinghaus, Andrea Schröder-Ritzrau, Daniela Polag, Denis Scholz, Monika Segl, Augusto Mangini
Publikováno v:
Chemical Geology. 279:31-39
In recent years, stalagmites have become important archives for paleoclimate. Several studies applying carbon and oxygen isotopes of stalagmites show a simultaneous increase of δ 13 C and δ 18 O along individual growth layers, which is interpreted
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4712df4c6537bff621de6ab8ddb3d36c
https://doi.org/10.1016/j.chemgeo.2010.09.016
https://doi.org/10.1016/j.chemgeo.2010.09.016
Publikováno v:
Deep Sea Research Part I: Oceanographic Research Papers. 49:377-394
Temporal changes in δ 15 N values of sinking particles collected with sediment traps in the Benguela upwelling regime off southwest Africa mirrored variations in the input of inorganic nitrogen to the surface water. Reductions in δ 15 N (to as low
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0082515296c03977e66fac5be33155b7
https://doi.org/10.1016/s0967-0637(01)00055-3
https://doi.org/10.1016/s0967-0637(01)00055-3
Autor:
Ch. Hemleben, R. Siman-Tov, Dieter Meischner, Ahuva Almogi-Labin, Monika Segl, Gerhard Schmiedl
Publikováno v:
Marine Micropaleontology. 40:295-319
Benthic and selected planktic foraminifera and stable isotope records were determined in a piston core from the Gulf of Aden, NW Arabian Sea that spans the last 530 ka. The benthic foraminifera were grouped into four principal assemblages using Q-mod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e55cb8e5cc1d2ee013fd1374ab4dfb1
https://doi.org/10.1016/s0377-8398(00)00043-8
https://doi.org/10.1016/s0377-8398(00)00043-8
Publikováno v:
Paleoceanography. 13:447-458
To reconstruct paleoceanographic changes in the eastern Mediterranean during the last 330,000 years, we studied benthic foraminifera in a piston core from the Ionian Sea. The fauna exhibits large fluctuations in foraminiferal number, diversity, and s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cbebe40730d5447f29018ffe71de532
https://doi.org/10.1029/98pa01864
https://doi.org/10.1029/98pa01864
Publikováno v:
Geo-Marine Letters. 18:58-65
Bulk δ15N values in surface sediment samples off the southwestern coast of Africa were measured to investigate the biogeochemical processes occurring in the water column. Nitrate concentrations and the degree of utilization of the nitrate pool are t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be42f05917daa23a4a6b08762ac9e676
https://doi.org/10.1007/s003670050052
https://doi.org/10.1007/s003670050052
Publikováno v:
Paleoceanography. 12:604-614
The δ15N records of two sediment cores from the Angola Basin have been used to investigate past changes in nutrient utilization in the surface waters of this highly productive region. Low 15N/14N ratios in the cores (from >3000 m water depth) genera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ee9f8104b33aeb90b12ca5c170ad8e8
https://doi.org/10.1029/97pa00819
https://doi.org/10.1029/97pa00819
Publikováno v:
Paleoceanography. 12:568-576
Planktonic foraminifera recovered from two cores in the northern Benguela upwelling system reveal a history of rapid events with a variability at sub-Milankovitch frequencies during the last 140 kyr. The “cold-water” planktonic foraminifer, left
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f5412852584612368d0b0c06d2110e6
https://doi.org/10.1029/97pa00823
https://doi.org/10.1029/97pa00823
Publikováno v:
Rapid Communications in Mass Spectrometry. 19:3086-3088
In order to produce CO2 for stable isotope analyses (delta(18)O and delta(13)C), carbonate samples are commonly digested in phosphoric acid. The acid recipe here presented is based on phase shifting crystalline orthophosphoric acid of pro-analysis qu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9859301c7d05c1730f5f001b6d61a0cc
https://doi.org/10.1002/rcm.2159
https://doi.org/10.1002/rcm.2159
Autor:
Peter J Müller, Ralph R Schneider, Jürgen Pätzold, Gerold Wefer, Monika Segl, M Elizabeth Holmes
Publikováno v:
Marine Geology. 134:1-12
Sedimentary δ15N contains a record of biogeochemical processes occurring in the water column. Stable nitrogen isotopes were measured in the bulk sedimentary matter of 18 surface sediment samples collected in three transects in the eastern Angola Bas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d943414631613d4dd6f84e5b3f06567
https://doi.org/10.1016/0025-3227(96)00031-x
https://doi.org/10.1016/0025-3227(96)00031-x
Publikováno v:
Geologische Rundschau. 85:536-545
We discuss geochemical proxies, reflecting processes of primary productivity, CaCO3 dissolution, and sediment redistribution in a piston core (RNDB 74P) from the Ontong Java Plateau. Due to the shallow water depth, biogenic carbonate is well preserve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eaf31b72227c9bfd651fb6738e247e2d
https://doi.org/10.1007/bf02369008
https://doi.org/10.1007/bf02369008