Zobrazeno 1 - 10
of 125
pro vyhledávání: '"V. Liebetrau"'
Autor:
D. L. Arévalo-Martínez, A. Haroon, H. W. Bange, E. Erkul, M. Jegen, N. Moosdorf, J. Schneider von Deimling, C. Berndt, M. E. Böttcher, J. Hoffmann, V. Liebetrau, U. Mallast, G. Massmann, A. Micallef, H. A. Michael, H. Paasche, W. Rabbel, I. Santos, J. Scholten, K. Schwalenberg, B. Szymczycha, A. T. Thomas, J. J. Virtasalo, H. Waska, B. A. Weymer
Publikováno v:
Biogeosciences, Vol 20, Pp 647-662 (2023)
For millennia, humans have gravitated towards coastlines for their resource potential and as geopolitical centres for global trade. A basic requirement ensuring water security for coastal communities relies on a delicate balance between the supply an
Externí odkaz:
https://doaj.org/article/0ebe6ec7372e4782a644e9466bbde836
Autor:
R. C. Xie, F. A. C. Le Moigne, I. Rapp, J. Lüdke, B. Gasser, M. Dengler, V. Liebetrau, E. P. Achterberg
Publikováno v:
Biogeosciences, Vol 17, Pp 4919-4936 (2020)
The eastern boundary region of the southeastern Pacific Ocean hosts one of the world's most dynamic and productive upwelling systems with an associated oxygen minimum zone (OMZ). The variability in downward export fluxes in this region, with strongly
Externí odkaz:
https://doaj.org/article/041326c6c0c94b75aa73d0f3bdd3ed4f
Publikováno v:
Biogeosciences, Vol 16, Pp 3565-3582 (2019)
Here we present a comprehensive attempt to correlate aragonitic Na∕Ca ratios from Desmophyllum pertusum (formerly known as Lophelia pertusa), Madrepora oculata and a caryophylliid cold-water coral (CWC) species with different seawater parameters su
Externí odkaz:
https://doaj.org/article/fa943fdd0ddb4155add0b8c6b4ba7422
Autor:
S. Geilert, C. Hensen, M. Schmidt, V. Liebetrau, F. Scholz, M. Doll, L. Deng, A. Fiskal, M. A. Lever, C.-C. Su, S. Schloemer, S. Sarkar, V. Thiel, C. Berndt
Publikováno v:
Biogeosciences, Vol 15, Pp 5715-5731 (2018)
Magmatic sill intrusions into organic-rich sediments cause the release of thermogenic CH4 and CO2. Pore fluids from the Guaymas Basin (Gulf of California), a sedimentary basin with recent magmatic activity, were investigated to constrain the link
Externí odkaz:
https://doaj.org/article/5a23248be221470d9ff79209dc71004f
Autor:
A. W. Dale, S. Sommer, U. Lomnitz, I. Montes, T. Treude, V. Liebetrau, J. Gier, C. Hensen, M. Dengler, K. Stolpovsky, L. D. Bryant, K. Wallmann
Publikováno v:
Biogeosciences, Vol 12, Iss 5, Pp 1537-1559 (2015)
Carbon cycling in Peruvian margin sediments (11 and 12° S) was examined at 16 stations, from 74 m water depth on the middle shelf down to 1024 m, using a combination of in situ flux measurements, sedimentary geochemistry and modelling. Bottom water
Externí odkaz:
https://doaj.org/article/5156412c72c348dc9a17b01ce7ad18b8
Publikováno v:
Biogeosciences, Vol 11, Iss 23, Pp 7077-7095 (2014)
In this study, we explore the correlation of I/Ca ratios in three calcitic and one aragonitic foraminiferal species. I/Ca ratios are evaluated as possible proxies for changes in ambient redox conditions across the Peruvian oxygen minimum zone to the
Externí odkaz:
https://doaj.org/article/533382e14c7c4aff980ecca12ad72b7b
The influence of seawater pH on U / Ca ratios in the scleractinian cold-water coral Lophelia pertusa
Autor:
J. Raddatz, A. Rüggeberg, S. Flögel, E. C. Hathorne, V. Liebetrau, A. Eisenhauer, W.-Chr. Dullo
Publikováno v:
Biogeosciences, Vol 11, Iss 7, Pp 1863-1871 (2014)
The increasing pCO2 in seawater is a serious threat for marine calcifiers and alters the biogeochemistry of the ocean. Therefore, the reconstruction of past-seawater properties and their impact on marine ecosystems is an important way to investigate
Externí odkaz:
https://doaj.org/article/6ad13f1a42b346a2b5fc9cfc84a0a7d8
Publikováno v:
Biogeosciences, Vol 11, Iss 2, Pp 507-523 (2014)
The forearc of the convergent margin offshore Costa Rica is a region characterized by strong advection of methane-charged fluids causing the formation of ubiquitous cold seeps (mounds). Presented here are the first measurements of microbial anaerobic
Externí odkaz:
https://doaj.org/article/d15b20906799401eb5ae4a9f18f4e46b
Publikováno v:
Biogeosciences, Vol 9, Iss 1, Pp 341-359 (2012)
In this study we present an initial dataset of Mn/Ca and Fe/Ca ratios in tests of benthic foraminifera from the Peruvian oxygen minimum zone (OMZ) determined with SIMS. These results are a contribution to a better understanding of the proxy potential
Externí odkaz:
https://doaj.org/article/97855378fd4042b89f1519171b180731
Publikováno v:
Biogeosciences, Vol 5, Iss 3, Pp 731-738 (2008)
Methane-related carbonates from Hydrate Ridge typically show several macroscopically distinguishable mineral phases, namely whitish aragonite, lucent aragonite, and gray micrite. The relationship of these phases to particular microorganisms or biogeo
Externí odkaz:
https://doaj.org/article/697452f94eb64544863568a55f614bad