The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community
Issue link: http://sea-technology.epubxp.com/i/887058
www.sea-technology.com October 2017 / st 41 and identify further areas of study. The report found that sea level in Jersey is rising by 3 mm per year, and extreme coastal events are likely to be more fre- quent. The report recommends that further work should comprise: undertaking flood inundation modeling to show the impact of extreme events on coastal communities; assessing the probabil- ity of wave peak periods occurring for projected wave heights; using a model and in-situ X-band radar observations to assess the long-term impact of cli- mate on beach morphology; creating a 2D storm impact model to better assess the impact of extreme events; perform- ing an assessment of pluvial flooding and modeling impact of extreme rain- fall events; investigating the potential of using satellite data to supplement in-situ observations and models; and undertaking beach surveys to provide better values for sand particle sizes and distribution. Smart Hydrophones Help Protect Killer Whales The killer whales around Vancou- ver Island need help to protect them from the effects of human activity, and Ocean Sonics has stepped up to the challenge with its novel hydrophone network. The final stage of the Whale Tracking Network has been installed by Ocean Sonics' field operations team in the Salish Sea on Canada's West Coast. The purpose of this real-time acoustic network is to monitor and track the lo- cations of the Southern Resident Killer Whale population in their critical habi- tat, making it easy for decision makers to know the state of the killer whales and assess the best course of action. The network is operated by Depart- ment of Fisheries & Oceans (DFO) Canada and comprises 28 icListen smart hydrophones deployed in nine nodes networked together via radio links to a central station where data are archived and presented to users. All hydrophones are synchronized to simplify localization of detected sounds. The typical sampling rate is 64 kHz, but can be as high as 512 kHz to detect high-frequency clickers such as the harbor porpoise. Authorized users access the Web server to view current or archived information on a chart of the area. The benefit to DFO is knowing where the animals are to better protect them from human activities. Nitrate Monitoring for QC Of Japan's Nori Nori is the dark seaweed paper found in nigiri sushi and sushi rolls, and it is both a vital food and export product for Japan. Japan is the world's largest producer of nori. In 2009, the nori crop in Japan's Inland Sea crashed. Production was low and the nori was off-color and tasted differently. Scientists working at a district research station operated by Okayama Prefecture noticed from their monthly sampling that the nitrate lev- els in the sea were higher that year. Working with Sea-Bird Scientific's Japanese representative CT&C;, they installed a network of SUNA V2 nitrate sensors to monitor and study the situa- tion. From the subsequent nitrate maps, they were able to determine the opti- mum nori production conditions and identified 3-micromolar nitrate as the critical threshold for harvesting. Now, when local nitrate levels spike above this threshold, farmers can employ var- ious options (e.g., early harvest, mov- ing lines) to mitigate damage. ST & LINEAR For mor building amplifiers to drive reactive loads. Model S16-20 A A 20% duty 35 x 31.5 x 35.5 inches; 985 lbs. isit our .instrumentsinc.com 7263 Engineer Rd., San Diego, CA 92111-1493 (858) 571-1111 FAX (858) 571-0188 info@instrumentsinc.com Copyright 2017