Mathematics – Logic
Scientific paper
Apr 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3107307j&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 7, CiteID L07307
Mathematics
Logic
5
Oceanography: General: Equatorial Oceanography, Oceanography: General: Numerical Modeling, Oceanography: Biological And Chemical: Nutrients And Nutrient Cycling, Oceanography: General: Paleoceanography
Scientific paper
Based on a physical-biological model with monthly mean forcing, numerical experiments are conducted to examine the effects of iron and silicate availability on phytoplankton growth in the equatorial Pacific. The effects of elevated iron are realized in terms of increasing the phytoplankton light acclimation efficiency (α) and decreasing the molar ratio Si/N of diatom uptake. The increase of α (decrease of Si/N) would release the iron stress to phytoplankton growth in the equatorial Pacific thus support higher organic production, which tends to drive the system into nitrate depletion. However, the biogenic silica (BSi) production remains largely unchanged due to the reduction of Si removal for unit production of organic nitrogen by diatoms. As a result, the BSi production is lower than the new production and the Si(OH)4 is higher than the NO3, which is consistent with conditions during glacial periods as inferred from the geological records but opposite to the conditions in the modern equatorial Pacific. The numerical experiments suggest that, if other conditions stay the same, low NO3 concentration during glacial periods may prevent diatoms from out-growing small phytoplankton in the equatorial Pacific.
Chai Fei
Jiang Mingshun
No associations
LandOfFree
Iron and silicate regulation of new and export production in the equatorial Pacific: A physical-biological model study does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Iron and silicate regulation of new and export production in the equatorial Pacific: A physical-biological model study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iron and silicate regulation of new and export production in the equatorial Pacific: A physical-biological model study will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-734224