<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Moore, J. K.</style></author><author><style face="normal" font="default" size="100%">Doney, S. C.</style></author><author><style face="normal" font="default" size="100%">Lindsay, K.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Upper ocean ecosystem dynamics and iron cycling in a global three-dimensional model</style></title><secondary-title><style face="normal" font="default" size="100%">Global Biogeochemical Cycles</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Glob. Biogeochem. Cycle</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">atlantic time-series</style></keyword><keyword><style  face="normal" font="default" size="100%">central equatorial</style></keyword><keyword><style  face="normal" font="default" size="100%">climate system model</style></keyword><keyword><style  face="normal" font="default" size="100%">community</style></keyword><keyword><style  face="normal" font="default" size="100%">ecosystem model</style></keyword><keyword><style  face="normal" font="default" size="100%">general-circulation model</style></keyword><keyword><style  face="normal" font="default" size="100%">glacial maximum</style></keyword><keyword><style  face="normal" font="default" size="100%">iron cycle</style></keyword><keyword><style  face="normal" font="default" size="100%">last</style></keyword><keyword><style  face="normal" font="default" size="100%">marine nitrogen-fixation</style></keyword><keyword><style  face="normal" font="default" size="100%">north-atlantic</style></keyword><keyword><style  face="normal" font="default" size="100%">nutrient limitation</style></keyword><keyword><style  face="normal" font="default" size="100%">pacific</style></keyword><keyword><style  face="normal" font="default" size="100%">particulate organic-matter</style></keyword><keyword><style  face="normal" font="default" size="100%">phytoplankton</style></keyword><keyword><style  face="normal" font="default" size="100%">southern-ocean</style></keyword><keyword><style  face="normal" font="default" size="100%">surface ocean</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2004</style></year><pub-dates><date><style  face="normal" font="default" size="100%">12/2004</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">pub/680</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">4</style></number><volume><style face="normal" font="default" size="100%">18</style></volume><isbn><style face="normal" font="default" size="100%">0886-6236</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A global three-dimensional marine ecosystem model with several key phytoplankton functional groups, multiple limiting nutrients, explicit iron cycling, and a mineral ballast/organic matter parameterization is run within a global ocean circulation model. The coupled biogeochemistry/ecosystem/circulation (BEC) model reproduces known basin-scale patterns of primary and export production, biogenic silica production, calcification, chlorophyll, macronutrient and dissolved iron concentrations. The model captures observed high nitrate, low chlorophyll (HNLC) conditions in the Southern Ocean, subarctic and equatorial Pacific. Spatial distributions of nitrogen fixation are in general agreement with field data, with total N-fixation of 55 Tg N. Diazotrophs directly account for a small fraction of primary production (0.5%) but indirectly support 10% of primary production and 8% of sinking particulate organic carbon (POC) export. Diatoms disproportionately contribute to export of POC out of surface waters, but CaCO3 from the coccolithophores is the key driver of POC flux to the deep ocean in the model. An iron source from shallow ocean sediments is found critical in preventing iron limitation in shelf regions, most notably in the Arctic Ocean, but has a relatively localized impact. In contrast, global-scale primary production, export production, and nitrogen fixation are all sensitive to variations in atmospheric mineral dust inputs. The residence time for dissolved iron in the upper ocean is estimated to be a few years to a decade. Most of the iron utilized by phytoplankton is from subsurface sources supplied by mixing, entrainment, and ocean circulation. However, owing to the short residence time of iron in the upper ocean, this subsurface iron pool is critically dependent on continual replenishment from atmospheric dust deposition and, to a lesser extent, lateral transport from shelf regions.&lt;/p&gt;</style></abstract><work-type><style face="normal" font="default" size="100%">Review</style></work-type><accession-num><style face="normal" font="default" size="100%">ISI:000225882300001</style></accession-num><notes><style face="normal" font="default" size="100%">&lt;p&gt;ISI Document Delivery No.: 881QHTimes Cited: 142Cited Reference Count: 115Cited References:      AMMERMAN JW, 2003, EOS T AM GEOPHYS UN, V84, P165     ANDERSON LA, 1994, GLOBAL BIOGEOCHEM CY, V8, P65     ANTIA AN, 2001, GLOBAL BIOGEOCHEM CY, V15, P845     ARCHER DE, 2000, GLOBAL BIOGEOCHEM CY, V14, P269     ARMSTRONG RA, 2002, DEEP-SEA RES PT II, V49, P219     AUMONT O, 2003, GLOBAL BIOGEOCHEM CY, V17, ARTN 1060     BALCH WM, 1996, MAR ECOL-PROG SER, V142, P87     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Woods Hole Oceanog Inst, Dept Marine Chem &amp;amp; Geochem, Woods Hole, MA 02543 USA. Natl Ctr Atmospher Res, Oceanog Sect, Boulder, CO 80307 USA.Moore, JK, Univ Calif Irvine, Irvine, CA 92697 USA.jkmoore@uci.edu&lt;/p&gt;</style></auth-address></record></records></xml>