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Lange, Benjamin Allen; Michel, Christine; Beckers, Justin; Casey, J Alec; Flores, Hauke; Hatam, Ido; Meisterhans, Guillaume; Niemi, Andrea; Haas, Christian (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice in the Lincoln Sea during spring. PANGAEA, https://doi.org/10.1594/PANGAEA.842377, Supplement to: Lange, BA et al. (2015): Comparing Springtime Ice-Algal Chlorophyll a and Physical Properties of Multi-Year and First-Year Sea Ice from the Lincoln Sea. PLoS ONE, 10(4), e0122418, https://doi.org/10.1371/journal.pone.0122418

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Abstract:
With near-complete replacement of Arctic multi-year ice (MYI) by first-year ice (FYI) predicted to occur within this century, it remains uncertain how the loss of MYI will impact the abundance and distribution of sea ice associated algae. In this study we compare the chlorophyll a (chl a) concentrations and physical properties of MYI and FYI from the Lincoln Sea during 3 spring seasons (2010-2012). Cores were analysed for texture, salinity, and chl a. We identified annual growth layers for 7 of 11 MYI cores and found no significant differences in chl a concentration between the bottom first-year-ice portions of MYI, upper old-ice portions of MYI, and FYI cores. Overall, the maximum chl a concentrations were observed at the bottom of young FYI. However, there were no significant differences in chl a concentrations between MYI and FYI. This suggests little or no change in algal biomass with a shift from MYI to FYI and that the spatial extent and regional variability of refrozen leads and younger FYI will likely be key factors governing future changes in Arctic sea ice algal biomass. Bottom-integrated chl a concentrations showed negative logistic relationships with snow depth and bulk (snow plus ice) integrated extinction coefficients; indicating a strong influence of snow cover in controlling bottom ice algal biomass. The maximum bottom MYI chl a concentration was observed in a hummock, representing the thickest ice with lowest snow depth of this study. Hence, in this and other studies MYI chl a biomass may be under-estimated due to an under-representation of thick MYI (e.g., hummocks), which typically have a relatively thin snowpack allowing for increased light transmission. Therefore, we suggest the on-going loss of MYI in the Arctic Ocean may have a larger impact on ice-associated production than generally assumed.
Coverage:
Median Latitude: 82.861191 * Median Longitude: -62.994125 * South-bound Latitude: 82.537480 * West-bound Longitude: -78.051570 * North-bound Latitude: 86.110320 * East-bound Longitude: -58.616280
Date/Time Start: 2010-05-05T00:00:00 * Date/Time End: 2012-05-10T00:00:00
Comment:
This dataset is related to the projects: CASIMBO - Canadian Arctic Sea Ice Mass Balance Observatory (headed by Dr. Christian Haas); BIOTA - Biological Impacts of Trends in the Arctic (headed by Dr. Christine Michel); and Iceflux - Ice-ecosystem carbon flux in polar oceans (headed by Dr. Hauke Flores).
Size:
18 datasets

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Datasets listed in this publication series

  1. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-1_10. https://doi.org/10.1594/PANGAEA.842359
  2. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-1_11. https://doi.org/10.1594/PANGAEA.842360
  3. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-1_12. https://doi.org/10.1594/PANGAEA.842361
  4. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-2_10. https://doi.org/10.1594/PANGAEA.842362
  5. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-2_11. https://doi.org/10.1594/PANGAEA.842363
  6. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-2_12. https://doi.org/10.1594/PANGAEA.842364
  7. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-3_10. https://doi.org/10.1594/PANGAEA.842365
  8. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-3_11. https://doi.org/10.1594/PANGAEA.842366
  9. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-3_12. https://doi.org/10.1594/PANGAEA.842367
  10. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-4_10. https://doi.org/10.1594/PANGAEA.842368
  11. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-4_11. https://doi.org/10.1594/PANGAEA.842369
  12. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-4_12. https://doi.org/10.1594/PANGAEA.842370
  13. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-5_10. https://doi.org/10.1594/PANGAEA.842371
  14. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-5_11. https://doi.org/10.1594/PANGAEA.842372
  15. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-5_12. https://doi.org/10.1594/PANGAEA.842373
  16. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-6_11. https://doi.org/10.1594/PANGAEA.842374
  17. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-6_12. https://doi.org/10.1594/PANGAEA.842375
  18. Lange, BA; Michel, C; Beckers, J et al. (2015): Ice-algal chlorophyll a and physical properties of multi-year and first-year sea ice of core CASIMBO-CORE-7_12. https://doi.org/10.1594/PANGAEA.842376