The influence of sea ice and snow cover and nutrient availability on the formation of massive under-ice phytoplankton blooms in the Chukchi Sea Public Deposited

http://ir.library.oregonstate.edu/concern/articles/sj1393619

Copyright 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND. The published article is available at:  http://www.journals.elsevier.com/deep-sea-research-part-ii-topical-studies-in-oceanography/

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • A coupled biophysical model is used to examine the impact of changes in sea ice and snow cover and nutrient availability on the formation of massive under-ice phytoplankton blooms (MUPBs) in the Chukchi Sea of the Arctic Ocean over the period 1988–2013. The model is able to reproduce the basic features of the ICESCAPE (Impacts of Climate on EcoSystems and Chemistry of the Arctic Pacific Environment) observed MUPB during July 2011. The simulated MUPBs occur every year during 1988–2013, mainly in between mid-June and mid-July. While the simulated under-ice blooms of moderate magnitude are widespread in the Chukchi Sea, MUPBs are less so. On average, the area fraction of MUPBs in the ice-covered areas of the Chukchi Sea during June and July is about 8%, which has been increasing at a rate of 2% yr⁻¹ over 1988–2013. The simulated increase in the area fraction as well as primary productivity and chlorophyll a biomass is linked to an increase in light availability, in response to a decrease in sea ice and snow cover, and an increase in nutrient availability in the upper 100 m of the ocean, in conjunction with an intensification of ocean circulation. Simulated MUPBs are temporally sporadic and spatially patchy because of strong spatiotemporal variations of light and nutrient availability. However, as observed during ICESCAPE, there is a high likelihood that MUPBs may form at the shelf break, where the model simulates enhanced nutrient concentration that is seldom depleted between mid-June and mid-July because of generally robust shelf-break upwelling and other dynamic ocean processes. The occurrence of MUPBs at the shelf break is more frequent in the past decade than in the earlier period because of elevated light availability there. It may be even more frequent in the future if the sea ice and snow cover continues to decline such that light is more available at the shelf break to further boost the formation of MUPBs there.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Zhang, J., Ashjian, C., Campbell, R., Spitz, Y. H., Steele, M., & Hill, V. (2015). The influence of sea ice and snow cover and nutrient availability on the formation of massive under-ice phytoplankton blooms in the Chukchi Sea. Deep Sea Research Part II: Topical Studies in Oceanography, 118, 122-135. doi:10.1016/j.dsr2.2015.02.008
Series
Keyword
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2016-03-08T15:18:08Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) ZhangInfluenceofSeaIce.pdf: 7345778 bytes, checksum: 680beca746a02615ae00220e34f7f783 (MD5)
  • description.provenance : Made available in DSpace on 2016-03-08T15:18:08Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) ZhangInfluenceofSeaIce.pdf: 7345778 bytes, checksum: 680beca746a02615ae00220e34f7f783 (MD5) Previous issue date: 2015-08
  • description.provenance : Submitted by Patricia Black (patricia.black@oregonstate.edu) on 2016-03-08T15:17:47Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) ZhangInfluenceofSeaIce.pdf: 7345778 bytes, checksum: 680beca746a02615ae00220e34f7f783 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items