John L. Spiesberger
Woods Hole Oceanogr. Inst., Woods Hole, MA 02543
Acoustic multipaths (250-Hz, 64-Hz bandwidth) from basin-scale (1000--4000 km) sections in the northeast Pacific are stable from month-to-month. This stability is a necessary pre-requisite for measuring climatic temperature change in the ocean. A new ray-tracing program [J. Bowlin et al., Woods Hole Oceanogr. Inst. technical report, Woods Hole, MA 02543 (in preparation, 1992)] is used to identify observed multipaths with more reliability than possible with previous ray trace programs.