Autun Purser

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Antje Boëtius

University of Bremen

Laura Hehemann

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Yann Marcon

University of Bremen

Laurenz Thomsen

Constructor University

Fabian Schramm

Simon Dreutter

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Tim W. Nattkemper

Bielefeld University

Timm Schoening

GEOMAR Helmholtz Centre for Ocean Research Kiel

Melanie Bergmann

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Boris Dorschel

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Cooperative Institutions

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

106

University of Bremen

Centre National de la Recherche Scientifique

GEOMAR Helmholtz Centre for Ocean Research Kiel

Woods Hole Oceanographic Institution

Ifremer

University of Bergen

University of Southampton

National Oceanography Centre

Institut de Ciències del Mar

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

The influence of four levels of feeding on the position and eruption of incisor teeth in sheep

The Journal of Agricultural Science (1957)

G. Wiener Autun Purser

The distance between the front of the incisor teeth and the front of the maxillary pad (incisor bite measure) was measured in 140 sheep about 1 year old. The sheep consisted of seven breed types—the offspring of Blackface ewes by Wiltshire, Border Leicester, Lincoln and Blackface rams, and of Welsh ewes by Welsh, Wiltshire and Suffolk rams. Within each breed type the effects of four different feeding treatments lasting 7 months were studied. These produced small but very significant differences in bite measure. Differences between breed types were significant only in respect of the division between the two breeds of dam. Effect of breed of dam, however, was confounded with any effect due to differences in origin. The proportion of permanent central incisors which had replaced milk teeth when the animals averaged a little more than a year old was affected both by the level of treatment during the experiment and by breed.

10.1017/s0021859600034304

Cite

Citations (17)

Videos snippets of incirrate octopods observed during SONNE cruise SO242/2 to the DISCOL Experimental Area, Peru Basin

Autun Purser Yann Marcon Henk-Jan T. Hoving Michael Vecchione Uwe Piatkowski

Sonne

10.1594/pangaea.865439

Cite

Citations (1)

Sedimentation on the cold-water coral Lophelia pertusa: Cleaning efficiency from natural sediments and drill cuttings

Marine Pollution Bulletin (2011)

Ann I. Larsson Autun Purser

Drill cuttings

Sediment trap

Sedimentation

10.1016/j.marpolbul.2011.03.041

Cite

Citations (96)

Seabed photographs taken along OFOS profile SO242/2_223-1 during SONNE cruise SO242/2

Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (2018)

Autun Purser Yann Marcon Antje Boëtius

Sonne

10.1594/pangaea.890630

Cite

Citations (0)

Seabed photographs taken along OFOS profile SO242/2_197-1 during SONNE cruise SO242/2

Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (2018)

Autun Purser Yann Marcon Antje Boëtius

Sonne

Seabed

10.1594/pangaea.890625

Cite

Citations (0)

Seabed photographs taken along OFOS profile SO242/2_174-1 during SONNE cruise SO 242/2

Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (2018)

Autun Purser Yann Marcon Antje Boëtius

Sonne

Seabed

10.1594/pangaea.890964

Cite

Citations (0)

Seabed photographs taken along OFOS profile SO242/2_203-1 during SONNE cruise SO242/2

Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (2018)

Autun Purser Yann Marcon Antje Boëtius

Sonne

Seabed

10.1594/pangaea.890626

Cite

Citations (0)

Supplementary material to "Faunal carbon flows in the abyssal plain food web of the Peru Basin have not recovered during 26 years from an experimental sediment disturbance"

Tanja Stratmann Lidia Lins Autun Purser Yann Marcon Clara F. Rodrigues

Abyssal plain

Abyssal zone

Carbon fibers

10.5194/bg-2018-167-supplement

Cite

Citations (0)

Observing the fate of methane utilizing Ocean Network Canada's cabled seafloor NEPTUNE Observatory

Martin Scherwath Michael Riedel Yann Marcon Miriam Römer Laurenz Thomsen

Cabled ocean observatories enable permanent continuous observations in situ in addition to regular sampling during observatory maintenance expeditions, which allow for some of the most comprehensive monitoring to understand the fate of methane all the way from below the seafloor (with instrumented boreholes), through the seafloor (with bottom sensors, cameras or cabled vehicles) into the water column (with sonars). Ocean Networks Canada is operating the NEPTUNE observatory off the coast of Vancouver Island since 2009 with two of its instrument nodes at gas hydrate sites. The first site, Clayoquot Slope, is at around 1200 m water depth and is a site of high fluid expulsion including large amounts of methane gas seepage, which has been observed for over a decade with permanent sonar scanning. The second site, Barkley Canyon, is at about 900 m water depth and has hydrate mounds with exposed gas hydrate on the seafloor, and is unique for its thermogenic methane and also oil seepage, and the most important observations have been made by a remotely-operated cabled and instrumented a seafloor crawler called Wally. This presentation will provide a few highlights on gas hydrate observations and invites the research community for new ideas how to expand the use of the permanent and continuous data flow opportunities that stem from the 24/7 presence of power and communication availability at the two different hydrate sights.

Neptune

Seafloor Spreading

10.5194/egusphere-egu24-14307

Cite

Citations (0)

First hyperspectral imaging survey of the deep seafloor: High-resolution mapping of manganese nodules

Remote Sensing of Environment (2018)

Ines Dumke Stein M. Nornes Autun Purser Yann Marcon Martin Ludvigsen

Hyperspectral seafloor surveys using airborne or spaceborne sensors are generally limited to shallow coastal areas, due to the requirement for target illumination by sunlight. Deeper marine environments devoid of sunlight cannot be imaged by conventional hyperspectral imagers. Instead, a close-range, sunlight-independent hyperspectral survey approach is required. In this study, we present the first hyperspectral image data from the deep seafloor. The data were acquired in approximately 4200 m water depth using a new Underwater Hyperspectral Imager (UHI) mounted on a remotely operated vehicle (ROV). UHI data were recorded for 112 spectral bands between 378 nm and 805 nm, with a high spectral (4 nm) and spatial resolution (1 mm per image pixel). The study area was located in a manganese nodule field in the Peru Basin (SE Pacific), close to the DISCOL (DISturbance and reCOLonization) experimental area. To test whether underwater hyperspectral imaging can be used for detection and mapping of mineral deposits in potential deep-sea mining areas, we compared two supervised classification methods, the Support Vector Machine (SVM) and the Spectral Angle Mapper (SAM). The results show that SVM is superior to SAM and is able to accurately detect nodule surfaces. The UHI therefore represents a promising tool for high-resolution seafloor exploration and characterisation prior to resource exploitation.

Seafloor Spreading

Spectral signature

Imaging spectrometer

10.1016/j.rse.2018.02.024

Cite

Citations (83)