How the Seafloor of the Antarctic Ocean is Changing

...and the Climate is Following Suit
Experts have reconstructed the depth of the Southern Ocean at key phases in the last 34 million years of the Antarctic’s climate history. The glacial history of the Antarctic is currently one of the most important topics in climate research. Why? Because worsening climate change raises a key question: How did the ice masses of the southern continent react to changes between cold and warm phases in the past, and how will they do so in the future? A team of international experts, led by geophysicists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), has... (read more)
2020-08-24 11:04:04

Using the Apache Unmanned Survey Vessel

Techniques in Bathymetric Survey
This paper explores the various features of the Apache USV series for efficient seafloor-level mapping. The CHCNAV hydrographic survey software is used for data recording and analysis. It provides results in the form of 3D models of the ground, contours and depth. (This story is brought to you by CHCNAV) Bathymetry is the study and mapping of the seabed or lake bed. It consists of obtaining measurements of the depth of the ocean or lakes and is equivalent to the mapping of the Earth’s topography. In general, only limited information is known about the seabed and lake beds. Existing maps... (read more)
2020-08-05 10:38:58

Mapping the Subsea Forests of the Mediterranean

Reviewing Remote Sensing Image Classification Techniques for Accurate Seagrass Mapping
What is the best image classification technique to optimize maps so that effective action can be taken to conserve seagrass meadows? The distribution of Posidonia oceanica seagrass meadows has been mapped by a combination of remote sensing techniques, geographical information systems (GIS) and sonar data. A fundamental, but challenging, part of this methodology is the remote sensing image classification. This article presents a review of different image classification techniques to optimise the final maps, so that effective action can be taken to conserve seagrass meadows. The degradation of P. oceanica seagrass meadows is a major concern as these marine ecosystems... (read more)
2020-08-04 09:03:05

New Depth Map over the Arctic Ocean

Details of a new depth map of the Arctic Ocean have been published in the Nature Journal Scientific Data. The new portrayal of the Arctic Ocean floor is in the form of a digital gridded database and comprises Version 4.0 of the International Bathymetric Chart of the Arctic Ocean (IBCAO). The gridded compilation has been completed under the auspices of the Regional Center for the Arctic and North Pacific Ocean of The Nippon Foundation-GEBCO Seabed 2030 Project. This Regional Center is one of four Seabed 2030 centers covering the world ocean and is run jointly by Stockholm University and the... (read more)
2020-07-20 02:24:13

Mapping Submarine Groundwater Discharge with Thermal Infrared Imaging

Using Cutting-edge Technology and High-resolution UAS
Submarine groundwater discharge (SGD) is a significant part of the water cycle that delivers anthropogenically derived and naturally occurring nutrients to coastal waters. As part of the drive to develop methods to prevent the degradation of coastal water quality, research conducted at the University of North Carolina Wilmington attempts to address the ambiguity associated with SGD point source locations. This case study outlines how cutting-edge high-resolution unmanned aerial system (UAS) thermal infrared (TIR) imaging methods have been coupled with the newest technology for continuous and autonomous SGD monitoring. Submarine groundwater discharge – the process in which groundwater flows down-gradient through... (read more)
2020-07-14 08:21:52

New IHO Guidelines for Hydrographic Geospatial Data

The IHO has published new guidelines for the development of product specifications for the creation of hydrographic geospatial data. Modern navigation systems and geospatial solutions use digital data from a variety of sources. In order to facilitate the integration of hydrographic data and applications, the IHO developed S-100, a hydrographic geospatial data standard that can support this array and that is fully aligned with international geospatial standards, in particular the ISO 19000 series. The aim of the new S-97 guidelines is to assist in the creation of harmonized product specifications utilizing S-100 for implementation within the e-Navigation ecosystem. This encompasses all product specifications... (read more)
2020-06-16 08:33:54

Dutch Flood Defence, the Natural Way

When the Dutch government and research institutions wanted to monitor how waves and currents would affect the pioneering use of artificial sand banks to protect a levee in a non-tidal freshwater system, Nortek was selected to supply key measuring instruments and set up the data telemetry system. The Houtribdijk is a 25km-long levee, or dike, separating two large artificial lakes, the IJsselmeer and the Markermeer. The lakes and accompanying levees protect the Netherlands from the forces of the North Sea’s extreme weather events, and from flooding from inland freshwater river systems. After years of exposure to the elements, the Houtribdijk... (read more)
2020-05-07 03:17:31

Fugro Wins NOAA Contract for Shoreline Mapping Services

Fugro has signed a five-year Indefinite Delivery Indefinite Quantity (IDIQ) contract with the US National Oceanic and Atmospheric Administration (NOAA) to provide shoreline mapping services in support of the agency’s Coastal Mapping Program. Issued through NOAA’s National Geodetic Survey (NGS), this multi-year contract is NGS’s second consecutive award to Fugro for services such as the provision of aerial imagery, topobathymetric Lidar, and shoreline feature compilation. NGS uses these data to update NOAA nautical charts, define US territorial limits, support coastal management activities and perform inundation modelling. “Fugro is proud to continue working with NOAA to update and improve the nation’s... (read more)
2020-04-07 12:54:34

First Hydrographic Survey in Cumberland Bay, South Georgia

The team onboard RRS Discovery recently completed 104 casts as part of the ORCHESTRA project, measuring conductivity, temperature and depth along three sides of the Scotia Sea and into the Weddell Sea, as well as conducting the first hydrographic survey in the western arm of Cumberland Bay, South Georgia. By measuring where and how much of properties such as heat are stored in the Southern Ocean, and how they are exchanged between different ocean basins, these hydrographic surveys help enhance our understanding of the role of the Southern Ocean in absorbing and storing heat and carbon. Two Main Hydrographic Sections NOC scientist Dr... (read more)
2020-04-06 10:11:06

No Trade Shows and Conferences… What are the Alternatives?

Hydro International Offers an Excellent Solution
Now that most trade shows and conferences are being cancelled or postponed due to the coronavirus outbreak, professionals in the geospatial industry are looking for other ways to keep one another informed. Perhaps you’re launching a new multibeam echosounder or a USV, or you want to share knowledge about innovative methods that achieve real efficiency gains… but which platforms can you use instead of physical events? At Hydro International, we offer several possibilities to fill the gaps in your communication strategy. A webinar is an excellent alternative to presenting details of your research or survey project at an industry event.... (read more)
2020-03-16 06:11:48
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