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Dr. Arne Leider

Name:

Dr. Arne Leider

Department:

Organic Paleobiogeochemistry (MPI-Jena/MARUM) (see new adress at IW3)

Job:

Research Scientist

Room:

MARUM I / 2710

Phone:

+49  421 218 - 65822

E-Mail:

e-mail address

 

Present adress

IW3
Room 1290
Am biologischen Garten 2
28359 Bremen

Phone: +49 421 218 - 65822
E-mail: e-mail address

Research interests

  • Organic Geochemistry (Lipid Biomarkers)
  • Precambrian molecular and isotope geochemistry
  • Biogeochemistry
  • Geobiology
  • Paleoenvironmental Sciences
  • Isotope Geochemistry (compound specific stable carbon and hydrogen isotopes)
  • Multiproxy calibrations and applications

 

Current research

PhD Project

Lipid biomarker proxies:Calibration and application at the southern Italian shelf (Central Mediterranean)

 

My PhD-project is part of the “Multidisciplinary study of continental/ocean climate dynamics using high-resolution records from the eastern Mediterranean” (MOCCHA), which is incorporated into the EUROCORES Program and explores two sites in the Mediterranean for future IODP proposals. A near-coastal site at the Gallipoli shelf (Gulf of Taranto, S Italy) and a deep anoxic basin site in the mid Ionian Sea provide marine records suitable for high resolution climate reconstruction with better than 4-yrs resolution for at least the last 4000 years. The program investigates a suite of organic and inorganic chemical parameters, foraminiferal isotopes and elemental composition as well as palynological composition of the samples.
The near-coastal site at the Gallipoli shelf revealed high-frequency 11-year and centennial-scale cyclicity in the sediment based on stable carbon and oxygen isotope profiles of planktic foraminifera and alkenone based Sea Surface Temperatures, suggesting a relation to solar forcing. The multidisciplinary approach of MOCCHA aims at the calibration and development of current and new terrestrial and oceanic paleo-climate-related proxies and their application to older units.

The main aspects of the PhD project are:

1. Analysis of specific lipid biomarkers based on a network of surface sediment samples from the SW Adriatic Sea and the Gulf of Taranto obtained during CAPPUCCINO cruise 2006. The aim is to tune biomarker related proxies which integrate recent conditions such as Sea Surface Temperature, algal ecology, changes in land-sea interaction, hydrology and transport. Identification and quantification will be achieved by performance of GC-MS, –FID and HPLC-MS protocols. Source classification will be obtained using compound specific stable isotopic composition analysis of carbon and hydrogen (GC-IRMS). Temperature proxies that will be compared are the alkenone based UK’37 and tetraether lipid based TEX86 index. Terrestrial derived organic matter will be analysed using long-chained n-alkanes, lignins and applying the recently presented BIT index.

2. Application of the above mentioned proxies to time slices of the Holocene. The aim of this study is a lipid-based environmental reconstruction to further unravel the climate dynamics and forcing in this region. As an overlook the main features of the second part of this project, based on high-resolution analysis, are:

• temperature reconstruction of key cores

• lipid-based reconstruction of changes in the marine community

• lipid-based reconstruction of land-sea interactions on basis of profiles and n-alkane stable isotope analysis


Ship expeditions

10/2008 - 11/2008DOPPIO Cruise on RV Pelagia (MOCCHA Project): Lissabon – Heraklion; Mediterranean Sea & Anoxic brine basins

Other activities

01/2008 - 03/2012PhD student within the EuroMARC Program of the European Science Foundation (ESF), Project: „Multidisciplinary study of continental/ocean climate dynamics using high-resolution records from the eastern Mediterranean (MOCCHA)”
09/2009ESF EuroMARC Award for best phd-students oral presentation: "New insights: Biomolecular proxies and recent environmental conditions along the southern Italian shelf" during 2nd EuroMARC Conference, September 14-16 2009, Presqu'ile de Giens, France
03/2008 - 03/2012PhD student within Bremen International Graduate School for Marine Sciences ‘Global Change in the Marine Realm (GLOMAR)', Research Area C, Marine Ecology and Biogeochemistry
08/2006 - 01/2007„Research Student“ within the framework of the European Graduate College ‘Proxies in Earth History’ (EUROPROX), Project 6, Organic Geochemistry, Department of Geosciences, University of Bremen, Germany
 
Imprint | © marum | This page was last updated by: Dr. Arne Leider. Date: 06-05-2013, 11:19 AM 58