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Re: Guideline Priorities (Was Re: OCMIP Guidelines Phase B2 (Tentative))



Hi Jim,

        This looks good to me.

JORGE


>Dear Jorge,
>
>It's a good idea to try to clarify the priorities.  I believe we all
>agree that 1st priority is to finish analysis of bomb and natural
>14C, as well as anthropogenic and natural CO2 (sol. + bio. pumps).
>
>The basic difference between your notes and the guidelines I sent is
>that that you give the 2nd priority (C) to running O2 and C-13 and 3rd
>priority (D) to the pure circulation tracers (age, dye, multiple decay
>rate, and CFC's); conversely, I group O2, C-13, as well as the age, dye,
>and multiple decay rate tracers as 2nd priority (B2), and the CFC's as
>3rd priority (C).
>
>To keep things clear, I agree to use your notation.  Also I agree,
>more or less, to your ordering of priorities.  I do suggest, however,
>that the CFC runs be moved to last phase, because analysis will
>probably be long and involved, i.e., given the vast amount of data
>available.  Thus taking into account your comments and mine, I suggest
>the following order
>
>--------------------------------------------------------------------------
>Phase   Description
>-----   ------------------------------------------------------------------
>  A     (Completed)
>  B     Natural and bomb C-14; natural and anthropogenic CO2 (in progress)
>  C     O2 and C-13
>  D     Multiple decay rate tracers
>  E     Age and Dye tracers
>  F     CFC's
>--------------------------------------------------------------------------
>
>Comments anyone?
>
>Regards,  Jim
>
>>  Hi Jim,
>>
>>          I am glad to see you getting things on track for OCMIP.  We had
>>  kind of let the ball drop since our last meeting in Holland (which is why I
>>  think we should meet regularly in the future).
>>
>>          Re. the following: I went back and consulted my minutes from our
>>  meeting in Holland.  Here is what I have:
>>
>>  Phase B is to coplete bomb and natural 14C, anthropogenic CO2, and the
>>  solubility and biological pumps.
>>
>>  Phase C is to add O2 and 13C
>>
>>  Phase D is to add tracers of ocean circulation, including CFC's, age
>>  tracers with an Austral Ocean source, and multiple decay rate tracers which
>>  would enable separation of mixing and advection.
>>
>>          What concerns me about the way you have set the guidelines is that
>>  some of the phase B goals under item 3. are going to take a while to get
>>  off the ground, while some of the other tracers could be done sooner.  I
>>  suggest that we try and plan things in order of achievability, so we can
>>  have the satisfaction of seeing ourselve progress through the goals at a
>>  reasonable pace.
>>
>>          On the other hand, given the remarkable disagreement in models in
>>  the anthropogenic CO2 versus bomb C14 inventory plots, it seems to me that
>>  one of the models we might want to move up to an earlier time slot is the
>>  multiple decay rate tracers so we can get a better grasp on the relative
>>  roles of mixing and advection in the models.
>>
>>  Best regards, JORGE
>>
>>
>>
>>  Jorge L. Sarmiento

Jorge L. Sarmiento
AOS Program, Princeton U.
Sayre Hall, Forrestal Campus
P.O. Box CN710
Princeton, NJ 08544-0710

Tel. (609) 258-6585
Fax. (609) 258-2850
E-mail: jls@splash.princeton.edu