Rep16 - Sub. Pac. Retrospectives

## Retrospective Studies

The overall goal of the retrospective studies is:

Carefully examine ecosystem or population shifts across the North Pacific Basin in relation to interdecadal or interannual climate variability, especially examining synchrony across populations.

Rather than recommend specific retrospective studies, the working group brainstormed potential data types that might be suitable for use in retrospective studies. We list them below as either biological or physical data sets, realizing that the true power of the retrospective studies will be in interfacing the two types of data sets.

Biological Data Sets

> Birds--life history parameters
> Marine mammals--life history parameters
> Fish--strength of year class; growth and survival; the group noted that it was important to include species other than salmonids in this aspect (e.g., halibut, sablefish, others)
> Salmon scales collected and analyzed since the early 1900s--perhaps organize and fund a workshop, since this data has been collected by many countries bordering the North Pacific
> Zooplankton abundance
> Paleoceanographic fish scale records

Physical Data Sets

> Wind Stress
> SST
> GAK1 Data Set from near Prince William Sound
> Hydrographic data sets
> COADS, mixed layer depth
> Trans-Pacific Cruises
> Drifter data sets
> Coastal sea level
> Coastal precipitation and river runoff
> Sea level pressure
> delta-O18
> Atmospheric models to hindcast storms, etc.