Description: The SCAR expert group on the International Bathymetric Chart of the Southern Ocean (IBCSO) was inaugurated in 2004. IBCSO is a regional mapping project of the General Bathymetric Chart of the Ocean (GEBCO) under the joint auspices of the Intergovernmental Oceanographic Commission (IOC) (of UNESCO) and the International Hydrographic Organization (IHO). The project aim was to create the first seamless bathymetric compilation for the entire Southern Ocean south of 60°S. In 2013, finally the first Version of IBCSO was published in the Journal Geophysical Research Letters (Arndt et al., 2013). IBCSO Version 1.0 is a prime example for an international collaboration in Antarctic Science. Over 30 institutions from 15 countries contributed data and shared their expertise to generate the, so far, largest database of bathymetric data of the Southern Ocean. From this database a digital bathymetric model (DBM) was produced. The DBM covers the entire Antarctic Treaty area in a resolution of 500 m. It is available in several formats and projections. In addition, a new map has been created of the Southern Ocean and Antarctica and now is also available to the SCAR community. Both, the DBM and the map, can be downloaded free of charge from the IBCSO web site (www.ibcso.org). In my poster presentation I will present the map product of the IBCSO project and give information about its included data sets, its distribution and its design.

Description: The SCAR expert group on the International Bathymetric Chart of the Southern Ocean (IBCSO) was inaugurated in 2004. IBCSO is a regional mapping project of the General Bathymetric Chart of the Ocean (GEBCO) under the joint auspices of the Intergovernmental Oceanographic Commission (IOC) (of UNESCO) and the International Hydrographic Organization (IHO). The project aim was to create the first seamless bathymetric compilation for the entire Southern Ocean south of 60°S. In 2013, finally the first Version of IBCSO was published in the Journal Geophysical Research Letters (Arndt et al., 2013). IBCSO Version 1.0 is a prime example for an international collaboration in Antarctic Science. Over 30 institutions from 15 countries contributed data and shared their expertise to generate the, so far, largest database of bathymetric data of the Southern Ocean. From this database a digital bathymetric model (DBM) was produced. The DBM covers the entire Antarctic Treaty area in a resolution of 500 m. It is available in several formats and projections. In addition, a new map has been created of the Southern Ocean and Antarctica and now is also available to the SCAR community. Both, the DBM and the map, can be downloaded free of charge from the IBCSO web site (www.ibcso.org). In my presentation I will give an overview of the IBCSO V1.0 compilation methods and highlight the improvements of the IBCSO DBM compared to global datasets. Furthermore, some tips and hints for the usage of IBCSO including the use of the Source Identifier grid (SID) will be given.

Description: The International Bathymetric Chart of the Southern Ocean (IBCSO) Version 1.0 is a new digital bathymetric model (DBM) portraying the seafloor of the circum-Antarctic waters south of 60° S. IBCSO is a regional mapping project of the General Bathymetric Chart of the Oceans (GEBCO). IBCSO Version 1.0 DBM has been compiled from all available bathymetric data collectively gathered by more than 30 institutions from 15 countries. These data include multibeam and single beam echo soundings, digitized depths from nautical charts, regional bathymetric gridded compilations, and predicted bathymetry. Specific gridding techniques were applied to compile the DBM from the bathymetric data of different origin, spatial distribution, resolution, and quality. The IBCSO Version 1.0 DBM has a resolution of 500 x 500 m, based on a polar stereographic projection, and is publicly available together with a digital chart for printing from the project website (www.ibcso.org) and at http://dx.doi.org/10.1594/PANGAEA.805736

Description: Mass loss from the Greenland Ice Sheet presently accounts for about 12% of the global mean sea-level rise. The ocean plays an important role in modulating the mass balance of the ice sheets in both polar regions by interacting with the ice shelves in Antarctica and with the marine-terminating outlet glaciers in Greenland. A key region for the latter is the floating ice tongue of Nioghalvfjerdsfjorden (’79.5°N Glacier’). To study the relevant processes here and to provide guidance for a large field campaign on and off the floating ice tongue in summer 2016, we plan to set up a global finite-element sea ice - ice shelf - ocean model with a mesh focussed on the Northeast Greenland shelf region and the sub-ice cavities. Given that the flux of warm water onto the shelf and into the sub-ice cavity is steered by complex bathymetry, a detailed topography dataset including the most recent surveys in the area is an essential ingredient. We follow the spirit of the global RTOPO-1 data set and compile consistent maps of global ocean bathymetry, upper and lower ice surface topographies and global surface height on a spherical grid with now 0.5 minute resolution. The maps include multibeam survey data for the bathymetry on the shelf off Northeast Greenland as well as high-resolution gridded data for upper and lower ice surface topography and cavity geometry of Nioghalvfjerdsfjorden going back to seismic surveys and to data from the IceBridge campaign. We show the improvements achieved in RTopo-2 for the region off Northeast Greenland in comparison with bathymetric products commonly used for numerical simulations. Based on the new data set we also discuss possible subsurface supply pathways of warm modified Atlantic waters onto the continental shelf off Northeast Greenland, possibly triggering basal melting in the subglacial cavities.

Description: The International Bathymetric Chart of the Southern Ocean (IBCSO) is a regional mapping project of the General Bathymetric Chart of the Ocean (GEBCO) operated under guidance of the UNESCO Intergovernmental Oceanographic Commission (IOC) and the International Hydrographic Organization (IHO). Moreover, IBCSO is established as an expert group of the Scientific Committee on Antarctic Research (SCAR) and its production is located at the Alfred Wegener Institute for Polar and Marine Research (AWI) in Bremerhaven, Germany. The objective of IBCSO was to create a first seamless Digital Bathymetric Model (DBM) covering the entire Southern Ocean. After the creation of the DBM two different maps have been produced based on the bathymetric model in collaboration with the Institute for Cartography of the TU Dresden. One version was designed to provide the scientific community with a new up to date ‘classic’ map of Antarctica. The second is envisaged to achieve largest possible outreach effect in the public by using the lenticular method. This method enables the beholder of the map to see the topography of the DBM in three dimensions without the necessity of auxiliary objects. The two different map versions of the IBCSO will be presented. The introduction includes a rough description of the working steps from ocean soundings to a combined digital bathymetric/topographic model. Furthermore, the steps to create the ‘classic’ and the lenticular map are described in detail.

Description: The International Bathymetric Chart of the Southern Ocean (IBCSO) is an expert group of SCAR since the XXVIII SCAR Conference held on 30th July 2004 in Bremen Germany and a regional Mapping project of the General Bathymetric Chart of the Ocean (GEBCO) operated under the joint auspices of the Intergovernmental Oceanographic Commission (IOC) (of UNESCO) and the International Hydrographic Organization (IHO). The objective of IBCSO is to produce the first seamless bathymetric grid for the area south of latitude 60° S surrounding Antarctica. This will be a benefit for several scientific purposes including (a) interpretation of seabed geology, (b) the building of habitat models and maps, and (c) mapping and tracing of deep ocean current pathways. In addition the IBCSO will serve as an indispensable database for new nautical Charts in the Southern Ocean to improve the safety of navigation in Antarctic waters. After the inaugural meeting in 2004, the Editorial Board was then established at the 1st IBCSO Meeting at Santa Barbara in 2007 including ambassadors of several SCAR member countries. Since then plenty of institutions holding bathymetric data in the Southern Ocean have been asked for a contribution to the IBCSO dataset. Gathering, compilation and analyses of bathymetric data turned out to be larger and more time consuming tasks than first envisioned. For this reason, there has not yet been an IBCSO gridded digital bathymetric model released. However, a first version is now scheduled to be released during the fall of 2012. It is proposed to give an overview in what has been done in the IBCSO project in the last years for the creation of IBCSO v1. This will include acknowledgements to the data contributors and a short explanation of the working steps data acquisition, homogenization, cleaning and gridding. Furthermore information on the current status of the grid production and previews of preliminary sections of the new dataset will be given.

Description: The International Bathymetric Chart of the Southern Ocean (IBCSO) is an expert group of the Scientific Committee on Antarctic Research (SCAR) since the XXVIII SCAR Conference held on 30th July 2004 in Bremen Germany and a regional mapping project of the General Bathymetric Chart of the Ocean (GEBCO) operated under the joint auspices of the Intergovernmental Oceanographic Commission (IOC) (of UNESCO) and the International Hydrographic Organization (IHO). The objective of IBCSO was to produce the first seamless bathymetric grid for the area south of latitude 60° S surrounding Antarctica. The IBCSO is going to be highly beneficial many scientific investigations. These include (a) interpretation of seabed geology, (b) the building of habitat models and maps, and (c) mapping and tracing of deep ocean current pathways. In addition the IBCSO is going to serve as an indispensable database for new nautical Charts in the Southern Ocean to improve the safety of navigation in Antarctic waters. After the inaugural meeting in 2004, the Editorial Board was then established at the 1st IBCSO Meeting at Santa Barbara in 2007 including representatives from several SCAR member countries. Since then, plenty of institutions holding bathymetric data in the Southern Ocean have been asked for a contribution to the IBCSO dataset. After the time consuming gathering, compilation and analyses of bathymetric data, finally the first version of the IBCSO is close to be released. Besides the grid an adjacent map has been developed, which is also going to be released in the near future. It is proposed to give an overview in what has been done in the IBCSO project in the last years for the creation of IBCSO v1. This will include acknowledgements to the data contributors and a short explanation of the working steps data acquisition, homogenization, cleaning and gridding. Previews of the new grid are going to demonstrate the improvement that has been achieved by IBCSO v1 compared to other bathymetric compilations like i.e. GEBCO 08. In addition a preview of the map will be presented.