MODEL DESCRIPTION
We applied a three dimensional ecosystem- physical coupled model including iron effect to the Okhotsk Sea. In order to clarify the sources of iron, four dissolved iron compartments, based on the sources of supply, were added to Kawamiya et al. (1995)’s model (KKYS) to create our ecosystem model (KKY...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.3436 http://www.chikyu.ac.jp/AMORE/2006proceeding-no.4/23.okunishi-kishi-207-216.pdf |
| Summary: | We applied a three dimensional ecosystem- physical coupled model including iron effect to the Okhotsk Sea. In order to clarify the sources of iron, four dissolved iron compartments, based on the sources of supply, were added to Kawamiya et al. (1995)’s model (KKYS) to create our ecosystem model (KKYS-Fe). We hypothesized that four processes supply iron to sea water: atmospheric loadings from Northeastern Asia, input from the Amur River, dissolution from sediments and regeneration by zooplankton and bacteria. We simulated 1year, from 1 January, 2001 to 31 December, 2001, using both KKYS-Fe and KKYS. KKYS could not reproduce the surface nitrate distribution after the spring bloom, whereas KKYS-Fe agreed well with observations in the northwestern Pacific because it includes iron limitation of phytoplankton growth. During spring bloom, the main source of iron at the sea surface is from the atmosphere. The contribution of riverine iron to total iron utilized for primary production is small in the Okhotsk Sea. Atmospheric deposition, iron flux from sediment and regeneration of iron in the water column play an important role in maintenance of high primary production in the Okhotsk Sea. |
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