Protocols for model and data analysis

In order to evaluate several of the North Pacific data sets and model products in a common framework that allow for a direct comparison of results and for the identification of coherent patterns of variability, we are establishing some common reference stations and regions for the intercomparisons. For the detailed time series studies at specific locations we are recommending that we focus our efforts on the following locations:

Equatorial region	155°W, at the equator.
Subtropical region	HOT: 22°45'N, 158°W
Subarctic region	Ocean station Papa: 50°N, 145°W. KNOT: 44°N, 155°E

A simultaneous set of regional boundaries include:

Tropical	15°S to 15°N
Subtropical	15°N to 44°N
Subarctic	> 44°N

Please use these boundaries for your regional flux calculations.

The tropical Pacific is a region that separated into a warm pool with a relatively constant temperature in the western Pacific and a cold tongue in the eastern Pacific. For warm pool versus cold tongue comparisons, lets follow the Takahashi et al. (2003) convention and have the dividing point at 175°E.

We are planning that we all use these boundaries for calculations of regional air-sea CO₂ fluxes based on models and data.

We need to discuss which wind-speed gas exchange relationships and wind products we should use unless someone wants to focus on the comparisons of these products. Perhaps Rik Wanninkhof would like to do this? For now, I suggest that we use the Wanninkhof (1992) wind-speed gas exchange relationship and the NCEP winds. Any other suggestions? Please address your questions and comments to me and I will distribute them to either Group 1, the broader Group, or both as appropriate.