Sea Technology

JUN 2017

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60 st / June 2017 www.sea-technology.com Arctic Freeze Can Be Predicted Up to Four Weeks Ahead The recent increases in the length of the Arctic open-water season have allowed for increased activity in the region. To support this increase and to provide data for assimilation into ice/ ocean forecast models, the Bedford Institute of Oceanography (BIO) has been running a real-time ocean obser- vatory at the east end of the Northwest Passage since 2009. It is being used as a testbed for further developments in ocean observatory technology. As this ocean observatory was de- ployed in an area where BIO had maintained an ice/ocean monitoring array from 1998 to 2011, which in- cluded moored ASL Ice Profiling So- nars, a long baseline of measurements could be used to establish a relation- ship between the salinity of the upper water column in the late summer and the time of freeze-up. Jim Hamilton and Merle Pittman wrote a paper showing that this infor- mation could predict freeze-up two to four weeks in advance. Arctic River Ice Disappearing Rapidly Climate change is causing thick ice deposits that form along Arctic rivers to melt nearly a month earlier than they did 15 years ago, a new study finds. River ice forms when Arctic ground- water reaches the surface and solidi- fies on top of frozen rivers. It grows throughout the winter until river val- leys are choked with ice. Some river icings have grown to more than 10 sq. km in area and can be more than 10-m thick. A new study measuring the extent of river ice in the U.S. and Canadian Arc- tic shows most river ice disappeared 26 days earlier on average in 2015 compared to 2000, melting around mid-June. Most ice that doesn't com- pletely melt every summer was signifi- cantly smaller in 2015 than in 2000. This is the first clear evidence that this important component of Arctic river systems is changing rapidly. First Statewide Beach Cleanup in Hawaii Six-time SUP (standup paddle- boarding) World Champion Kai Lenny, alongside Sustainable Coastlines Ha- waii and The 5 Gyres Institute, have led the first-ever statewide beach cleanup on the Hawaiian Islands. Using human-powered crafts, Len- ny traveled the 200 nautical miles to attend beach cleanups and empower communities around oceanic pollu- tion. Lenny and the team completed the voyage in five days, facilitating six cleanups and removing 11,049 lb. of debris. With 5 Gyres Research Director and Co-Founder Dr. Marcus Eriksen, Lenny trawled for microplastic pollution, which Eriksen first identified as "plastic smog" when he established the world's first Global Estimate of Plastic Pollu- tion of 5.25 trillion particles, weighing in at 270,000 tons. Wärtsilä 34DF Engines Get EPA Tier III Certification Wärtsilä has been awarded model year 2017 certification of emissions compliance from the U.S. Environ- mental Protection Agency (EPA) for its Wärtsilä 34DF dual-fuel engine fam- ily. The Tier III certification of confor- mity covers the Wärtsilä 34DF engines manufactured from the date of issue until the end of 2017. These are the first Category 3 Tier III certificates issued by the EPA to any manufacturer. Category 3 relates to en- gines with a displacement per cylinder of greater than 30 liters. The certification verifies that the Wärtsilä 34DF engine is fully com- pliant with the EPA Tier III emission standards in gas mode operation. The engine is equipped with a continuous nitrogen oxide (NOx) measuring and monitoring system for verifying emis- sions compliancy inside NOx Emission Control Areas (NECA). When sailing outside NECAs, the engine can be op- erated with conventional marine diesel fuels if required. EMEC Redeploys Integrated Monitoring Pod The European Marine Energy Cen- tre (EMEC) has redeployed its bespoke Integrated Monitoring Pod, fitted with innovative turbulence instruments to help measure the impact of turbulence on tidal energy devices. Prior to deployment, the pod was fitted with a MicroRider turbulence system designed by Rockland Scien- tific. The sensor system combines stan- dard flow measurement technology (acoustic and electromagnetic) with novel nonacoustic measurement tech- nology (shear probes). Integration of the new instruments on the pod has been made possible thanks to the InSTREAM (In Situ Tur- bulence Replication Evaluation And Measurement) project that will enable tidal energy developers to optimize de- sign so that technologies can withstand the effects of strong tides and currents. InSTREAM is a U.K.-Canadian project. TDI-Brooks to Conduct Surveys in Caribbean TDI-Brooks International Inc. has been selected to perform three site surveys and an environmental base- line project in the Caribbean. Two well sites are at a depth of approximately 140 m, and a third well site lies at 650 m. The project was to be completed in May for wells to be drilled in July. TDI-Brooks's RV Proteus will con- duct the site, environmental baseline and habitat assessment surveys utiliz- ing side scan, magnetometer, multi- beam and sub-bottom profiling. Year of Polar Prediction To Improve Polar Assessments The World Meteorological Organi- zation (WMO) and the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) have be- gun the international research initia- tive "Year of Polar Prediction" (YOPP). The goal of the two-year project, which involves partners from more than 20 countries, is to improve weather, ice and climate predictions for the Arctic and Antarctic to achieve more reli- able risk assessments for shipping and other human activities, which will help to avoid accidents, and better under- stand how climate changes at the poles shape weather in the middle latitudes. Experts working at universities, weather services and research centers will conduct intensive measuring cam- paigns in the Arctic and Antarctic and use the data to create advanced weath- er, ice and climate models. All data will be shared via the WMO Informa- tion System to help forecasting around the world. Polar forecasts can also be factored into socioeconomic decision making. ST environmentalmonitoring

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