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Polarsternexpedition ANT-XXIX/6; 8. Juni - 12. August 2013; Kapstadt-Punta Arenas
Ziel der Expedition: Ein interdisziplinäres Forschungsprogramm in Atmosphäre, Meereis, Ozean und Ökosystem im antarktischen Winter, um die physikalischen und biogeochemischen Eigenschaften und Prozesse während der Wachstumsphase des Meereises besser zu verstehen. Fahrt war die erste antarktische Winterexpedition seit dem Jahr 2006. (Kurs wie im Winterexperiment 1992) 


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AWI sea-ice physicists are working on the sea ice, while the wind is acclerating and the snow drift is increasing.

Polarsternexpedition ANT-XXIX/6; 8. June - 12. August 2013; Cape Town -Punta Arenas (Chile); The aim of the cruise is to carry out an interdisciplinary research programm on atmosphere, sea ice, ocean, and ecosystem during winter to obtain an understanding of physical and biogeochemical properties and processes during the sea ice growth season. It was the first Antarctic winter expedition since the year 2006.


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      • // Science
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      • // AMIN

      AMIN

      Acoustic sea bed classification of the North Sea – Sediment dynamics in the farshore environments

      Measurement and evaluation of bedforms, sediment distributions, and biogenic surface structures are the initial steps to understand the dynamic processes of marine benthic ecosystems. The knowledge of active and dynamic sediment processes (especially net sediment transport) is important for the early detection of large-scale hydrographic changes, and subsequently climate change.
      For area-wide predictions of seabed sediment characteristics, new approaches and classification methods using the acoustic backscatter appearance of the seafloor, have been developed during the last years. However, the data comparison and application of commercial devices to other study areas are limited. In this regard, acoustic catalogues as well as standardized processing—mosaicking and data blending routines are necessary. Hence, acoustic catalogue, and data processing and measurement routines have been established by the project "WIMO" for the shallow coastal regions of the German North Sea.
      Similar procedures have been developed for distant and deeper water areas in the “AMIN Project”, and in the comprehensive project entitled "Development of standardized procedures for the area wide mapping of grain size distributions in the economic zone of the German North Sea and Baltic Sea" of the Federal Maritime and Hydrographic Agency (BSH).
      In May 2016, a guideline for “Seafloor Mapping in German Marine waters Using High-Resolution Sonars” was published by BSH and its partners: AWI, Christian-Albrechts-University Kiel (Institute of Geosciences), the Senckenberg-Institut am Meer Wilhelmshaven (Marine Sedimentology), and the Leibnitz-Institute for Baltic Sea Research Warnemünde (Marine Geology).
      The products of the area-wide hydroacoustic sediment distribution mapping (including hard substrates) are more detailed and accurate than existing maps (e.g. Figge 1981). They provide valuable information for offshore decision-making (i.e. fisheries management and marine engineering) or for marine detection (i.e. biotope mapping or environmental monitoring). The sediment distribution maps are available on the GeoSeaPortal of the BSH.

      Contact: Dr. Rune Michaelis, Dr. Christian Hass

       

      Related research papers:

      Michaelis, R., Hass, H.C., Mielck, F., Papenmeier, S., Sander, L., Ebbe, B., Gutow, L., Wiltshire, K.H. (2019). Hard-substrate habitats in the German Bight (South-Eastern North Sea) observed using drift videos. Journal of Sea Research 144, 78-84. DOI: 10.1016/j.seares.2018.11.009.

      Michaelis, R., Hass, H.C., Mielck, F., Papenmeier, S., Sander, L., Gutow, L., Wiltshire, K.H. (2019). Epibenthic assemblages of hard-substrate habitats in the German Bight (south-eastern North Sea) described using drift videos. Continental Shelf Research, 175: 30-41. DOI: 10.1016/j.csr.2019.01.011.

      Michaelis, R., Hass, H.C., Papenmeier, S., Wiltshire, K.H. (2019). Automated Stone Detection on Side-Scan Sonar Mosaics Using Haar-Like Features. Geosciences 9(5), 216. DOI: 10.3390/geosciences9050216.

      Papenmeier, S., Darr, A., Feldens, P., Michaelis, R. (2020): Hydroacoustic Mapping of Geogenic Hard Substrates: Challenges and Review of German Approaches. Geosciences, 10, 100. DOI: 10.3390/geosciences10030100.

      Papenmeier, S., Galvez, D., Günther, C.-P., Pesch, R., Propp, C., Hass, H. Ch., Schuchardt, B., Zeiler, M. (2020): Winnowed gravel lag deposits between sandbanks in the German North Sea. In: Peter T. Harris and Elaine Baker: Seafloor geomorphology as benthic habitat. GeoHab Atlas of seafloor geomorphic features and benthic habitats. 2nd Edition. Elsevier. p.451-460. DOI: 10.1016/B978-0-12-814960-7.00025-7.

      Papenmeier, S., Hass, H.C. (2018). Detection of stones in marine habitats combining simultaneous hydroacoustic surveys. Geosciences, 8 (8), 279. DOI: https://doi.org/10.3390/geosciences8080279

      Last update: 24.04.2020
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