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Raw data of physical oceanography during RV HEINCKE cruise HE638

Raw physical oceanography data was acquired by a ship-based Seabird SBE911plus CTD-Rosette system onboard RV HEINCKE . The CTD was equipped with duplicate sensors for temperature (SBE3plus) and conductivity (SBE4) as well as one sensor for oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer (FLRTD) and an altimeter (Teledyne Benthos PSA-916) were mounted to the CTD. The data was recorded using pre-cruise calibration coefficients. No correction, post-cruise calibration or quality control was applied. Processed profile data are available via the link below.

Raw data of physical oceanography during RV HEINCKE cruise HE678

Raw physical oceanography data was acquired by a ship-based Seabird SBE911plus CTD-Rosette system onboard RV HEINCKE . The CTD was equipped with duplicate sensors for temperature (SBE3plus) and conductivity (SBE4) as well as one sensor for oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer (FLRTD) and an altimeter (Teledyne Benthos PSA-916) were mounted to the CTD. The data was recorded using pre-cruise calibration coefficients. No correction, post-cruise calibration or quality control was applied. Processed profile data are available via the link below.

Raw data of physical oceanography during RV HEINCKE cruise HE675

Raw physical oceanography data was acquired by a ship-based Seabird SBE911plus CTD-Rosette system onboard RV HEINCKE . The CTD was equipped with duplicate sensors for temperature (SBE3plus) and conductivity (SBE4) as well as one sensor for oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer (FLRTD) and an altimeter (Teledyne Benthos PSA-916) were mounted to the CTD. The data was recorded using pre-cruise calibration coefficients. No correction, post-cruise calibration or quality control was applied. Processed profile data are available via the link below.

Physical oceanography during RV HEINCKE cruise HE678

Conductivity-temperature-depth profiles were measured using a Seabird SBE 911plus CTD during RV HEINCKE cruise HE678. The CTD was equipped with duplicate sensors for temperature (SBE3plus), conductivity (SBE4) and oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer and an altimeter (PSA-916 Teledyne (Benthos)) were mounted to the CTD. Temperature, conductivity and oxygen sensors are calibrated by the manufacturer once a year before being mounted in January. They are used throughout the year and no post-cruise or in-situ calibration is applied. All other sensors are calibrated irregularly. Data were connected to the station book of the specific cruise as available in the DSHIP database. Processing of the data including removal of obvious outliers followed the procedures described in CTD Processing Logbook of RV HEINCKE (hdl:10013/epic.47427). The processing report for this dataset is linked below.

Physical oceanography during RV HEINCKE cruise HE675

Conductivity-temperature-depth profiles were measured using a Seabird SBE 911plus CTD during RV HEINCKE cruise HE675. The CTD was equipped with duplicate sensors for temperature (SBE3plus), conductivity (SBE4) and oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer and an altimeter (PSA-916 Teledyne (Benthos)) were mounted to the CTD. Temperature, conductivity and oxygen sensors are calibrated by the manufacturer once a year before being mounted in January. They are used throughout the year and no post-cruise or in-situ calibration is applied. All other sensors are calibrated irregularly. Data were connected to the station book of the specific cruise as available in the DSHIP database. Processing of the data including removal of obvious outliers followed the procedures described in CTD Processing Logbook of RV HEINCKE (hdl:10013/epic.47427). The processing report for this dataset is linked below.

Physical oceanography during RV HEINCKE cruise HE655/2

Conductivity-temperature-depth profiles were measured using a Seabird SBE 911plus CTD during RV HEINCKE cruise HE655/2. The CTD was equipped with duplicate sensors for temperature (SBE3plus), conductivity (SBE4) and oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer and an altimeter (PSA-916 Teledyne (Benthos)) were mounted to the CTD. Temperature, conductivity and oxygen sensors are calibrated by the manufacturer once a year before being mounted in January. They are used throughout the year and no post-cruise or in-situ calibration is applied. All other sensors are calibrated irregularly. Data were connected to the station book of the specific cruise as available in the DSHIP database. Processing of the data including removal of obvious outliers followed the procedures described in CTD Processing Logbook of RV HEINCKE (hdl:10013/epic.47427). The processing report for this dataset is linked below.

Raw data of physical oceanography during RV HEINCKE cruise HE479

Raw physical oceanography data was acquired by a ship-based Seabird SBE911plus CTD-Rosette system onboard RV HEINCKE. The CTD was equipped with duplicate sensors for temperature (SBE3plus) and conductivity (SBE4) as well as one sensor for oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer (FLRTD) and an altimeter (Teledyne Benthos PSA-916) were mounted to the CTD. The data was recorded using pre-cruise calibration coefficients. No correction, post-cruise calibration or quality control was applied. Processed profile data are available via the link below.

Raw data of physical oceanography during RV HEINCKE cruise HE655/2

Raw physical oceanography data was acquired by a ship-based Seabird SBE911plus CTD-Rosette system onboard RV HEINCKE . The CTD was equipped with duplicate sensors for temperature (SBE3plus) and conductivity (SBE4) as well as one sensor for oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer (FLRTD) and an altimeter (Teledyne Benthos PSA-916) were mounted to the CTD. The data was recorded using pre-cruise calibration coefficients. No correction, post-cruise calibration or quality control was applied. Processed profile data are available via the link below.

Raw data of physical oceanography during RV HEINCKE cruise HE641

Raw physical oceanography data was acquired by a ship-based Seabird SBE911plus CTD-Rosette system onboard RV HEINCKE . The CTD was equipped with duplicate sensors for temperature (SBE3plus) and conductivity (SBE4) as well as one sensor for oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer (FLRTD) and an altimeter (Teledyne Benthos PSA-916) were mounted to the CTD. The data was recorded using pre-cruise calibration coefficients. No correction, post-cruise calibration or quality control was applied. Processed profile data are available via the link below.

Schwerpunktprogramm (SPP) 1158: Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Bereich Infrastruktur - Antarktisforschung mit vergleichenden Untersuchungen in arktischen Eisgebieten, Bedeutung von Meio- und Makrofauna für Ökosystemfunktion: Auswirkungen regional unterschiedlicher Eisbedeckungsmuster

Die antarktischen Ökosysteme sind von starken Veränderungen betroffen, insbesondere was die Eisbedeckung angeht. Wir wissen nicht wie dies die Prozesse am Meeresboden, die benthischen Funktionen, beeinflusst. Informationen zur Rolle verschiedener Tiergemeinschaften für benthische Funktionen unter variabler und stabiler Eisbedeckung sind für ein besseres Verständnis der Ökosystemprozesse dringend notwendig. Nur in wenigen Studien wurden unterschiedliche Größenklassen wie Meio- und Makrofauna gleichzeitig untersucht, und in keiner wurde ihre Bedeutung für benthische Funktionen untersucht. Daher ist der Einfluss von geringer werdender oder sich verändernder Meereisbedeckung auf die trophischen Interaktionen zwischen Meio- und Makrofauna sowie deren Bedeutung für die Prozesse am Meeresboden nicht geklärt. Dazu gehört auch ob und wie sich die benthische Remineralisation, bestimmt durch Stoffflussmessungen von Ammonium, Nitrat, Phosphat, Kieselsäure und Sauerstoff an der Sediment-Wasser-Grenzschicht, verändert. Für den Südozean ist über die jeweiligen Anteile der Meio- und Makrofaunagemeinschaften an dieser Remineralisation nichts bekannt.Mit unserem 3-Jahres Projekt werden wir gemeinsam die Reaktion benthischer Ökosystemfunktionen auf unterschiedliche Meereisbedeckungssituationen im Weddellmeer und entlang der Antarktischen Halbinsel einschätzen. Um die Rollen der verschiedenen Größenklassen und ihrer assoziierten Taxa im System Meeresboden besser zu verstehen, müssen wir (1) die Bedeutung der Strukturen der Meio- und Makrofaunagemeinschaften für die Ressourcenaufteilung und die Remineralisierung in Regionen mit unterschiedlicher Eisbedeckung und (2) den Effekt von erhöhtem Nahrungsaufkommen bei sich verändernder Eissituationen auf die Interaktionen von Ökosystemfunktion und Größenklassen bestimmen.Die beiden komplementären Aspekte werden mit einem/r gemeinsam betreuten Doktoranden/in durchgeführt. Proben wurden bereits auf den beiden Polarstern-Expeditionen PS 81 (22.01 bis 18.03.2013, nordwestliches Weddellmeer, Antarktische Halbinsel) und PS 96 (06.12.2015 bis 14.02.2016 südöstliches Weddellmeer) genommen. Die untersuchte Region umfasst Gebiete mit reduzierter, variabler und anhaltender Eisbedeckung. Mittels Inkubationen wird die räumliche Variabilität der Remineralisationsraten und die Rolle der Meio- und Makrofaunataxa bestimmt und mit deren Position im Nahrungsnetz zu verbunden. Um den Einfluss erhöhten Nahrungseintrags auf die Partitionierung der Nahrungsaufnahme und die Remineralisation durch die Tiergruppen zu testen, wurden Pulse-Chase Experimente durchgeführt.Die Ergebnisse bilden die Grundlage für das dritte Arbeitspaket: Die Entwicklung eines konzeptionellen Modells für die Evaluation benthischer Systemfunktionen im sich verändernden Südozean, welches die Mehrheit der Größenklassen und Prozesse betrachtet.

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