1. Bill Landing, FSU
CLIVAR A16N 2003
Broad dissolved nitrate, Fe and Co maximum ( m) under the Saharan plume (0-20N).
Feature due to atmospheric input, biological uptake and deeper regeneration AND/OR lateral transport?

2. Dissolved nitrate contours (at 500m) show elevated concentrations offshore suggesting that in-situ regeneration is important (?).
Other tracers of lateral transport in suboxic zone? Dissolved Mn shows no evidence for suboxic “plume”.

3. Proposed transect along nitrate and O2 gradient towards western Africa;
Crossing transects to define N/S and E/W extent of Fe, Co, and nitrate plume.
Occupy transects at least twice:
Late Summer to capture Saharan dust imprint,
Mid-Spring to assess “decay rate” of Fe plume.