subduction of the Pacific and Philippine plates beneath Japan. Higher 

 frequencies, 2, 6, and 12 year ones, probably are caused by oceanographic 

 factors such as shifts in the position of the Kuroshio . The contours of 

 relative change in sea- levels provide convincing evidence that no one or 

 several Japanese tide gages can be selected to authentically denote present or 

 past eustatic sea-levels. We introduce a modified eigenanalysis to permit use 

 of station data of unequal lengths. (Authors). 



004 AUBREY. D. G ., and EMERY, K. 0. 1983. "Eigenanalysis of Recent United 

 States Sea-Levels," Continental Shelf Research . Vol 2, No. 1, pp 21-33. 



Spatial and temporal patterns of recent sea- level rise along the United 

 States coastline have been examined to ascertain rates of rise, and possible 

 causes for high-frequency fluctuations in sea- level. Eigenanalysis identified 

 several distinct coastal compartments within each of which sea-level behavior 

 is consistent. The United States east coast has three of these compartments: 

 one north of Cape Cod, where sea-level rise increases with distance to the 

 north; one between Cape Cod and Cape Hatteras where sea- level rise increases 

 to the south; and the third from Cape Hatteras south to Pensacola, where sea- 

 level rise decreases to the south. The western gulf coast represents another 

 compartment (poorly sampled in this study) , where subsidence is partly due to 

 compaction. The final compartment is along the United States west coast, 

 where poor spatial sampling produces a highly spatially variable sea- level 

 record that has some temporal uniformity. Spectral analysis shows a dominant 

 time scale of 6 years for sea- level variability, with different coastal 

 compartments responding relatively in or out of phase. No evidence for 

 increased rates of sea-level rise over the past 10 years was found. This 

 objective statistical technique is a valuable tool for identifying spatial and 

 temporal sea- level trends in the United States. It may later prove useful for 

 identifying elusive world-wide trends of sea- level, related to glacial melt- 

 ing, glacial rebound, tectonism, and volcanic activity. (Authors). 



005 AUBREY, D. G., and EMERY, K. 0. 1986. "Australia- -An Unstable Platform 

 for Tide-Gage Measurements of Changing Sea-Levels," Journal of Geology . 

 Vol 94, pp 699-712. 



Twenty-five tide-gage records non-unif ormly distributed along the coast 

 of Australia were used to evaluate the stability of Australia as a platform 

 from which to measure changes in sea- levels. The spatial and temporal 

 variabilities of relative sea-levels were defined using a multivariate 

 analytical tool (eigenanalysis) on 13 of these stations. Low-frequency 

 (period 20 years and greater) relative sea-levels are believed to reflect the 

 combined effects of subsistence due to sediment and water loading, subsidence 

 due to thermal cooling of oceanic crust, and emergence along a convergent 

 plate boundary. Global eustatic sea-level rise cannot be identified 

 unambiguously from these data, but clearly it is not responsible for the 

 observed patterns of relative sea-level. The straight average rate-of-rise of 

 relative sea-level around Australia is 1.3 mm/year, (submergence), with 

 general submergence in the south (at an average rate of 1.8 mm/year.) and 



