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Icebergs as unique Lagrangian ecosystems in polar seas
Smith Jr., K.L.; Sherman, A.D.; Shaw, T.J.; Sprintall, J. (2013). Icebergs as unique Lagrangian ecosystems in polar seas, in: Carlson, C.A. et al. Ann. Rev. Mar. Sci. 5. Annual Review of Marine Science, 5: pp. 269-287. https://dx.doi.org/10.1146/annurev-marine-121211-172317
In: Carlson, C.A.; Giovannoni, S.J. (Ed.) (2013). Ann. Rev. Mar. Sci. 5. Annual Review of Marine Science, 5. Annual Reviews: Palo Alto. ISBN 978-0-8243-4505-1. 569 pp., more
In: Annual Review of Marine Science. Annual Reviews: Palo Alto, Calif. ISSN 1941-1405; e-ISSN 1941-0611, more
Peer reviewed article  

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Keyword
    Marine/Coastal
Author keywords
    pelagic community, carbon cycle, carbon export, Southern Ocean, Labrador Sea

Authors  Top 
  • Smith Jr., K.L.
  • Sherman, A.D.
  • Shaw, T.J.
  • Sprintall, J.

Abstract
    Global warming and its disproportionate impact on polar regions have led to increased iceberg populations. Southern Ocean studies in the northwest Weddell Sea have verified substantial delivery of terrestrial material accompanied by increased primary production and faunal abundance associated with free-drifting icebergs. It is hypothesized that input and utilization of macro- and micronutrients are promoted by conditions unique to free-drifting icebergs, leading to increased production, grazing, and export of organic carbon. In Arctic regions, increased freshwater input from meltwater acts to stratify and stabilize the upper water column. As has been observed in the Southern Ocean, Arctic-region icebergs should drive turbulent upwelling and reduce stratification, potentially leading to increased nitrate delivery to the local ecosystem. Increasing populations of icebergs in polar regions can potentially be important in mediating the drawdown and sequestration of CO2 and can thus impact the oceanic carbon cycle.

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