Mooring Operations for Thin-Ice Arctic Acoustic Window (THAAW) Project.

摘要

The Arctic Ocean is currently undergoing dramatic changes, including reductions in the extent and thickness of the ice cover and extensive warming of the intermediate layers. The multiyear ice is melting. Ice keels are getting smaller. With more open water, the internal wave energy level and therefore acoustic volume scattering are likely increasing, at least during summer. What was learned about acoustic propagation and ambient noise in the Arctic during the Cold War is now obsolete. The long-term objectives of this research program are to understand the effects of changing Arctic conditions on low-frequency, deep-water propagation and on the low-frequency ambient noise field. The goal is to determine the fundamental limits to signal processing in the Arctic imposed by ocean and ice processes. At the request of ONR, the Woods Hole Oceanographic Institution (WHOI), in collaboration with Dr. Peter Worcester at the Scripps Institution of Oceanography, will deploy a Distributed Vertical Line Array (DVLA) receiver near the North Pole. The DVLA will be deployed from ice camp Barneo in April 2013 and recovered from Barneo in the spring of 2014.