{"id":890,"date":"2021-06-17T13:51:40","date_gmt":"2021-06-17T13:51:40","guid":{"rendered":"https:\/\/andrea-koschinsky.org\/?page_id=890"},"modified":"2025-10-02T13:01:47","modified_gmt":"2025-10-02T13:01:47","slug":"charlotte-kleint","status":"publish","type":"page","link":"https:\/\/andrea-koschinsky.org\/pt\/alumni\/charlotte-kleint\/","title":{"rendered":"Dr. Charlotte Kleint (Scientific Fellow)"},"content":{"rendered":"

Senior Scientist at MARUM<\/a><\/h4>\n\n\n
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Research Interests:<\/em><\/strong><\/p>\n\n\n\n

Fluid geochemistry of deep-sea and shallow-marine hydrothermal vent systems, stabilization of hydrothermally derived metals (e.g. Fe), trace metal geochemistry and trace metal cycling in the ocean, organic and inorganic stabilization of metals in the ocean<\/p>\n\n\n\n

Processes controlling the elemental composition of Fe-Mn deposits, selective leaching (bioleaching) of Fe-Mn nodules, ecological effects of deep-sea mining<\/p>\n\n\n\n

Research coordination (cruises, proposals, workshops etc.)<\/p>\n\n\n\n

Research project: <\/strong><\/em>Transport and speciation of hydrothermally derived metals from different island arc systems and mid-ocean ridges<\/em><\/p>\n\n\n\n

Iron (Fe) and e.g. zinc (Zn) represent limited but essential micronutrients within the marine biogeochemical cycle in most oceans. For many years, hydrothermal vents were neglected as sources of dissolved metals into the oceans.<\/p>\n\n\n\n

However, ongoing research has shown that Fe is introduced to the world oceans and stabilized at elevated concentrations by hydrothermal venting, potentially transported thousands of kilometers away from its original source into the distal oceans, thereby contributing to the global oceanic metal budget. This is due to both inorganic (e.g. as sulfide nanoparticles) as well as organic complexation by small metal chelating molecules \u2013  so called organic ligands.<\/p>\n\n\n\n

Island arc hydrothermalism occurs at much shallower water depths than hydrothermalism at mid-ocean ridges. Hence, dissolved stabilized bioactive trace metals may be transported into the photic zone, the area of highest primary production rates in the ocean.  There, hydrothermally derived metals may serve as essential micronutrients (Fe and Zn) or potential toxins (Al or Cu) to marine organisms, such as phytoplankton.<\/p>\n\n\n\n

Island arc hydrothermalism has not gained much attention thus far. In our projects related to RV SONNE cruises into the SW Pacific, SO253 (Kermadec Arc) and  SO263 (Tonga Arc), we show that the role of this process in the oceans\u2019 biogeochemical cycle of metals and the metals\u2019 bioavailability may have been underestimated to date.<\/p>\n\n\n\n

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Projects<\/strong><\/p>\n\n\n\n

2026 – 2032\u00a0\u00a0\u00a0 Cluster of Excellence, University of Bremen, MARUM <\/strong>(DFG)<\/p>\n\n\n\n

The Ocean Floor – Earth’s Uncharted Interface – Part 2<\/p>\n\n\n\n

2019 – 2025\u00a0\u00a0\u00a0\u00a0 Cluster of Excellence, University of Bremen, MARUM <\/strong>(DFG)<\/p>\n\n\n\n

The Ocean Floor – Earth’s Uncharted Interface
<\/strong><\/p>\n\n\n\n

Research Unit “REACTOR”, Theme 3: Processes and dynamics of vents and seeps<\/strong><\/p>\n\n\n\n

https:\/\/www.marum.de\/en\/The-Ocean-Floor.html<\/a><\/p>\n\n\n\n

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2018 – 2020     TONGARIFT<\/strong> (BMBF)<\/p>\n\n\n\n

active participation as fluid chemistry leader in RV SONNE (SO 263) reserach cruise to the Tonga Island Arc, SW Pacific, June 2018 (Suva-Suva); <\/strong>(Chief scientist K. Haase, Univ. Erlangen; co-PIs: W. Bach, Univ. Bremen, and A. Koschinsky, Jacobs University Bremen); ROV QUEST, CTD, TV grab, rock corer<\/p>\n\n\n\n

Blog from the cruise:
https:\/\/www.jacobs-university.de\/ships-log-sonne-so263<\/a><\/p>\n\n\n\n

2016 – 2019     HYDROTHERMADEC<\/strong> (BMBF)<\/p>\n\n\n\n

active participation in RV SONNE  (SO 253) research cruise to the Kermadec Island Arc, SW Pacific, Dec. 2016 \u2013 Jan. 2017 (Noum\u00e9a-Auckland); <\/strong>(Chief Scientist: A. Koschinsky, Jacobs University Bremen); ROV QUEST, CTD, trace metal free CTD, clean container, in-situ pumps<\/p>\n\n\n\n

Blog and video from the cruise:
http:\/\/geschichten.ptj.de\/so253-en<\/a><\/p>\n\n\n\n

https:\/\/www.bmbf.de\/SharedDocs\/Videos\/de\/bmbf\/7\/73\/7393_expedition-sonne.html<\/a><\/p>\n\n\n\n

2015 – 2017     FLUM <\/strong>(BMBF)<\/p>\n\n\n\n

Active participation in RV SONNE (SO 240) research cruise to the Clarion Clipperton Zone, Central Pacific, May 2015 (Manzanillo-Manzanillo); <\/strong>(Chief scientist T. Kuhn, BGR Hannover; co-PIs: A. Koschinsky, Jacobs University Bremen, S. Kasten, AWI Bremerhaven, and H. Villinger, Uni Bremen); CTD, MUC, piston corer, gravity corer, dregde<\/p>\n\n\n\n

2013 – 2015     COVOLVE<\/strong> (BMBF)<\/p>\n\n\n\n

Active participation in RV SONNE (SO 229) research cruise to the New Hebrides Island Arc, Vanuatu, June 2013 (Townsville-Noum\u00e9a); <\/strong>(Chief scientist K. Haase, Univ. Erlangen; co-PIs: U. Schwarz-Schampera, BGR Hannover, and A. Koschinsky, Jacobs University Bremen); ROV KIEL 6000, TV grab, CTD<\/p>\n\n\n\n

All projects related to hydrothermal vent fluids are carried out in collaboration with Dr. Dieter Garbe-Sch\u00f6nberg<\/a> (Univ. Kiel) and his ICP-MS laboratory.<\/p>\n\n\n\n

Further previous investigations of shallow hydrothermal vents haven taken place in collaboration with the working group of Dr. Solveig B\u00fchring<\/a> (Univ. Bremen) at Milos<\/strong> (Mediterranean), Iceland<\/strong>, and Dominica<\/strong> (Caribbean).<\/p>\n\n\n\n

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Publications:<\/em><\/strong><\/p>\n\n\n\n

https:\/\/scholar.google.com\/citations?user=b6DO6t0AAAAJ&hl=de<\/a><\/p>","protected":false},"excerpt":{"rendered":"

Senior Scientist at MARUM Research Interests: Fluid geochemistry of deep-sea and shallow-marine hydrothermal vent systems, stabilization of hydrothermally derived metals (e.g. Fe), trace metal geochemistry and trace metal cycling in the ocean, organic and inorganic stabilization of metals in the<\/p>","protected":false},"author":4,"featured_media":0,"parent":851,"menu_order":24,"comment_status":"closed","ping_status":"closed","template":"","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"footnotes":""},"class_list":["post-890","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/pages\/890","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/comments?post=890"}],"version-history":[{"count":21,"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/pages\/890\/revisions"}],"predecessor-version":[{"id":3715,"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/pages\/890\/revisions\/3715"}],"up":[{"embeddable":true,"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/pages\/851"}],"wp:attachment":[{"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/media?parent=890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}