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  4. Report and preliminary results of R/V POSEIDON cruise POS539, Varna (Bulgaria) - Varna (Bulgaria) November 6 - November 21, 2019
 
Zitierlink DOI
10.26092/elib/349

Report and preliminary results of R/V POSEIDON cruise POS539, Varna (Bulgaria) - Varna (Bulgaria) November 6 - November 21, 2019

Veröffentlichungsdatum
2020-10-29
Autoren
Milucka, Jana  
Graf, Jon  
Marchant, Hannah  
Kitzinger, Katharina  
von Arx, Jan Niccolo  
Wendt, Jenny  
Decker, Charlotte  
Elling, Felix J.  
Gande, Darjan  
Stock, Lennart  
Ruhland, Götz  
Zusammenfassung
The R/V POSEIDON cruise POS539 took place in the northwestern basin of the Black Sea (42°30’N to 44°N and 29°E to 31°E). The overarching aim of the campaign was to obtain sediment and water samples, including suspended particle material, from the various redox zones of the Black Sea. The campaign lasted between November 6th and November 21st 2019 and the collected samples were taken in order to investigate the activity and physiology of microorganisms involved in the conversion of nitrogen compounds and degradation of organic carbon under various oxygen conditions. The main topics of the cruise were: (a) to quantify the contribution of archaeal nitrifiers to the nitrogen and carbon cycles, b) to measure the production and consumption of the powerful greenhouse gases CH4 and N2O, c) to record palaeoenvironmental changes in high resolution, and d) to describe the complexity and identity of biopolymers. For this, water and sediment samples were retrieved from 10 discrete shelf and slope stations. First, ‘deep water’ transect was conducted, which included three stations with water depths over 2000 m. The second perpendicular transect encompassed stations that gradually transitioned from the deep parts of the slope towards the shelf (ca. 80 m depth). Additionally, two stations were setup north and south of the shelf transect, respectively, for paleoceanographic studies. Throughout the cruise the weather conditions were overwhelmingly good, only towards the end of the campaign gusty winds of 7 Bft were recorded. The recorded oceanographic conditions were in agreement with the expected water properties at all stations. Station activities were completed on November 20th at 14:00 local board time. On November 21st at 10:30 local time, R/V POSEIDON reached the port of Varna, Bulgaria, thus concluding the POS539 expedition. Analyses and results from the samples and experiments will provide a basis for our understanding of the microbial control on the carbon and nitrogen cycle of the Black Sea.
Schlagwörter
Black Sea

; 

biogeochemistry

; 

paleoceanography

; 

microbiology

; 

polysaccharides

; 

greenhouse gases

; 

nitrification
Institution
Universität Bremen  
Fachbereich
Fachbereich 05: Geowissenschaften (FB 05)  
Institute
Marum – Zentrum für Marine Umweltwissenschaften  
Dokumenttyp
Artikel/Aufsatz
Zeitschrift/Sammelwerk
Berichte aus dem MARUM und dem Fachbereich Geowissenschaften der Universität Bremen  
Band
325
Startseite
1
Endseite
30
Seitenzahl
34
Zweitveröffentlichung
Nein
Lizenz
http://creativecommons.org/licenses/by/3.0/de/
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

Cruise-Report-POS539_28102020_eLib-1.pdf

Size

2.25 MB

Format

Adobe PDF

Checksum

(MD5):0a585a0f2de95c782f1e93aea9fb2c6d

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