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Subject: Reminder: ASLO 2005

Reminder: Call for abstracts, ASLO 2005 Summer Meeting, Santiago de Compostela, June 19-14. ********************************************************************* Abstract Submission Deadline: February 1, 2005 ********************************************************************* Dear all, we would like to invite you to particpate in, and constribute to, our special session (SS14) "Nutrient return pathways to the upper ocean and their climate sensitivity on decadal to centennial time scales" at the next ASLO Summer Meeting in Santiago de Compostela, June 19-14, 2005. Please find a provisional outline of our session plan attached below. The complete program of the meeting can be found at http://aslo.org/santiago2005/program.html . Please submit your abstract before 1 February 2005 via http://aslo.org/santiago2005/submission.html (for our session please with email copy directly to us). Thank you for your consideration!
Best regards,
Jorge and Andreas
Jorge L. Sarmiento, AOS Program, Princeton University, Sayre Hall, Forrestal Campus, P.O. Box CN710, Princeton, NJ 08544-0710, Tel. (609) 258-6585, Fax (609) 258-2850, jls@princeton.edu

Andreas Oschlies, School of Ocean and Earth Science, Southampton Oceanography Centre, GB Southampton SO14 3ZH, Tel ++44 (0) 23 8059 3559, Fax ++44 (0) 23 8059 3052, andreas.oschlies@soc.soton.ac.uk

ASLO 2005, Special Section 14: Nutrient return pathways to the upper ocean and their climate sensitivity on decadal to centennial time scales

Data from large-scale surveys and process studies as well as results from ecosystem-circulation models now begin to unravel details of the complex three-dimensional pathways that return nutrients from thermocline and deeper waters back to the ocean surface. Recent studies have revealed the potential of various mode and intermediate water masses to modulate nutrient supply on decadal to centennial time scales. However, the mechanisms that control the nutrient and associated carbon fluxes and their climate sensitivity are not yet well understood. Processes that may be relevant range from upwelling and subsequent modification of nutrient-rich deep water masses, large-scale balances of mode-water formation and destruction, and eddy-mediated transports, to local enhancements of diapycnal mixing. We invite contributions from both data and model based studies that help to identify the relevant pathways along which nutrients are carried back to the ocean surface, to quantify the associated transport rates and transition times, and to determine their sensitivity to climate change. Session overview: the large-scale picture: water mass modifiation - in the Southern Ocean - associated with mode waters - in the tropics - as represented in circulation models - transition time scales - the Lagrangian view processes relevant for water mass modification: - air-sea fluxes - subduction, upwelling, entrainment - transport across the base of the surface mixed layer - role of eddies - role of western boundary currents, topography - diapycnal mixing in the ocean interior - effects of double diffusion and of the non-linearity of the state equation response to recent climate variability sensitivity to expected future climate change

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