Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Heincke	HE585-2	28.09.2021 - 30.09.2021		North Sea

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Koch Boris	Alfred Wegner Institut - Climate System	Bremerhaven	Bremerhaven

Ziel der Reise / Objectives of Cruise:

During the four days of the expedition, a total of 19 stations were sampled. In the afternoon of Sep 27th 2021, the onboard labs were prepared in the harbor of Cuxhaven. After departure on Sep 28th at 8:00 a.m. (CET), we started sampling a transect in the River Elbe towards Helgoland with a total of ten CTD stations. On the second day, due to expected bad weather conditions, we decided to change the original station plan and sampled six stations on a transect back to Bremerhaven. On Sept 30th, three additional stations on the River Weser were sampled between Nordenham and the Bremerhaven Container terminal. All stations were sampled with the water rosette and the CTD device at 2-3 depths. Inorganic nutrients, oxygen and solid phase extractions were carried out onboard in the chemistry lab. Nutrient concentrations were measured onboard photometrically and oxygen concentration was assessed by Winkler titration. Dissolved organic matter extractions were also carried out onboard. Dissolved organic carbon and nitrogen as well as the filters for suspended matter (SPM) were frozen and analyses were carried out back in the labs of the University of Applied Sciences Bremerhaven and the Alfred Wegener Institute right after the cruise.

Messungen / Measurements