Program and Agenda

Abstract

THE WOCE/CLIVAR RADIOCARBON PROGRAMS--DECADAL CHANGES IN DI14C IN THE WORLD'S OCEANS

The National Ocean Sciences Accelerator Mass Spectrometry Facility (NOSAMS) has measured the radiocarbon content of dissolved inorganic carbon (DI14C) in over 21,000 WOCE and CLIVAR samples; data from these analyses are available at unrestricted web sites (e.g., http://cchdo.ucsd.edu). While the WOCE results provide a global snapshot of the radiocarbon distribution in all oceans, the CLIVAR reoccupations document the migration of the bomb-produced DI14C spike throughout the thermocline and abyssal oceans. We will present a comparison of reoccupations in all the ocean basins. In the southern Pacific Ocean along 150°W, Jenkins et al. (2010) calculated both increases and decreases of up to 70 ‰ in the surface 1500 m over 15 years. The bomb signal is penetrating deeper and moving laterally away from the primary entry points into the interior. Three cruises along 32°S coupled with limited data from the 1970’s GEOSECS Program document a relatively constant decrease of 2.6 ‰/yr in the surface water across the entire basin. A Southern Atlantic transect along the prime meridian shows the transport of the bomb signal into this region from the western basin.

ePoster:

Authors

McNichol, A. P., Woods Hole Oceanographic Institution, USA, amcnichol@whoi.edu

Key, R. M., Princeton University, USA, Robert Key

Jenkins, W. J., Woods Hole Oceanographic Institution, USA, wjenkins@whoi.edu

Elder, K. L., Woods Hole Oceanographic Institution, USA, kelder@whoi.edu

Gagnon, A. R., Woods Hole Oceanographic Institution, USA, agagnon@whoi.edu

Details

Poster presentation

Session #:159
Date: 2/25/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 2552