Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Discovery	311	09.09.2006 - 05.10.2006	ASOF-N	Denmark Strait North Atlantic Ocean

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Quadfasel Detlef	Institut fur Meereskunde der Universitat Hamburg	Reykjavik	Reykjavik

Ziel der Reise / Objectives of Cruise:

The objective of the Discovery cruise D311 was to study different aspects of the Denmark Strait overflow. The first part of the cruise was concentrated to examine the water masses at the sill and the upstream conditions in the East Greenland Current and in the Iceland Sea. Two pathways of overflow water have been discovered north of Denmark Strait. One flows along the Greenland continental slope and involves waters from the Arctic Ocean, Fram Strait and the Greenland Sea. The other runs on the northwestern Iceland shelf and apparantly carries the densest overflow water. The origin of this water mass is not yet determined. Does it derive from the Iceland Sea or does it come from farther north? To resolve this question the water mass characteristics in the East Greenland Current and in the Iceland Sea will be examined by CTD observations and weater sampling involving CFCs, H3, He3, O2, O18. In addition attempts to recover moorings with ROV have be made. The first leg ended in Reykjavik, where exchange of scientific personnel took place. After the exchange Discovery continued to the Greenland slope, where the VEINS and ASOF CTD sections were be taken and the mooring array at Angmassalik recovered and redeployed. The purpose of these sections south of the sill in Denmark Strait is to study the evolution, strength and variability of the overflow plume - how the different water masses from north of the sill mix on their way to the south.

Messungen / Measurements

Verankerungen / Moorings