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Katlein, Christian; Fernández-Méndez, Mar; Wenzhöfer, Frank; Nicolaus, Marcel (2014): Solar radiation over and under sea ice and photographic quantification of Ice algal aggregates during the POLARSTERN cruise ARK-XXVII/3 (IceArc) in summer 2012. PANGAEA, https://doi.org/10.1594/PANGAEA.833292, Supplement to: Katlein, C et al. (2014): Distribution of algal aggregates under summer sea ice in the Central Arctic. Polar Biology, Polar Biology, 38(5), 719-731, https://doi.org/10.1007/s00300-014-1634-3

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Abstract:
The ice cover of the Arctic Ocean has been changing dramatically in the last decades and the consequences for the sea-ice associated ecosystem remain difficult to assess. Algal aggregates underneath sea ice have been described sporadically but the frequency and distribution of their occurrence is not well quantified. We used upward looking images obtained by a remotely operated vehicle (ROV) to derive estimates of ice algal aggregate biomass and to investigate their spatial distribution. During the IceArc expedition (ARK-XXVII/3) of RV Polarstern in late summer 2012, different types of algal aggregates were observed floating underneath various ice types in the Central Arctic basins. Our results show that the floe scale distribution of algal aggregates in late summer is very patchy and determined by the topography of the ice underside, with aggregates collecting in dome shaped structures and at the edges of pressure ridges. The buoyancy of the aggregates was also evident from analysis of the aggregate size distribution. Different approaches used to estimate aggregate biomass yield a wide range of results. This highlights that special care must be taken when upscaling observations and comparing results from surveys conducted using different methods or on different spatial scales.
Related to:
Katlein, Christian; Nicolaus, Marcel; Petrich, Chris (2014): The anisotropic scattering coefficient of sea ice. Journal of Geophysical Research: Oceans, 119(2), 842-855, https://doi.org/10.1002/2013JC009502
Funding:
Seventh Framework Programme (FP7), grant/award no. 294757: Assessment of bacterial life and matter cycling in deep-sea surface sediments
Coverage:
Median Latitude: 84.881542 * Median Longitude: 75.932969 * South-bound Latitude: 81.884667 * West-bound Longitude: 17.453670 * North-bound Latitude: 88.827670 * East-bound Longitude: 131.128670
Date/Time Start: 2012-08-09T08:08:00 * Date/Time End: 2012-09-29T15:10:00
Comment:
Measurements of solar radiation over and under sea ice as well as surveys of the distribution of algal aggregates under sea ice have been performed on various stations in the Arctic Ocean during the Polarstern cruise ARK-XXVII/3 (IceArc) between 10 August and 29 September 2012. All radiation measurements have been performed with Ramses spectral radiometers (Trios, Rastede, Germany). All data are given in full spectral resolution interpolated to 1.0 nm and integrated over the entire wavelength range (broadband, total: 320 to 950 nm). Two sensors were mounted on a Remotely Operated Vehicle (ROV) and one radiometer was installed on the sea ice for surface reference measurements (solar irradiance). On the ROV, one irradiance sensor (cos-collector) for energy budget calculations and one radiance sensor (7° opening angle) to obtain high resolution spatial variability were installed. Along with the radiation measurements, sea-ice draft, roughness as well as under-ice aggregate coverage were recorded. Videos were recorded by a camera mounted in an upward looking position onboard a ROV. Still images were extracted each 5 seconds and aggregates detected in the images. Final processed data are provided gridded on a 3x3m grid in local floe coordinates.
Size:
64 datasets

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Datasets listed in this publication series

  1. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Detected aggregates at sea ice station PS80/224-1. https://doi.org/10.1594/PANGAEA.833383
  2. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Upward looking videos recorded with an ROV under sea ice at station PS80/224-1. https://doi.org/10.1594/PANGAEA.833284
  3. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar irradiance as measured in different depths under sea ice (transmitted irradiance) at sea ice station PS80/224-1. https://doi.org/10.1594/PANGAEA.833366
  4. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): ROV navigation parameters recorded at sea ice station PS80/224-1. https://doi.org/10.1594/PANGAEA.833355
  5. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar radiance as measured in different depths under sea ice (transmitted radiance) at sea ice station PS80/224-1. https://doi.org/10.1594/PANGAEA.833367
  6. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar irradiance transmitted through snow and sea ice as measured in different depths under sea ice (transmittance) at sea ice station PS80/224-1. https://doi.org/10.1594/PANGAEA.833369
  7. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar radiance transmitted through snow and sea ice as measured in different depths under sea ice (transflectance) at sea ice station PS80/224-1. https://doi.org/10.1594/PANGAEA.833368
  8. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Incident spectral solar irradiance measured above sea ice at sea ice station PS80/224-1. https://doi.org/10.1594/PANGAEA.833363
  9. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Detected aggregates at sea ice station PS80/237-1. https://doi.org/10.1594/PANGAEA.833532
  10. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Upward looking videos recorded with an ROV under sea ice at station PS80/237-1. https://doi.org/10.1594/PANGAEA.833285
  11. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar irradiance as measured in different depths under sea ice (transmitted irradiance) at sea ice station PS80/237-1. https://doi.org/10.1594/PANGAEA.833475
  12. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): ROV navigation parameters recorded at sea ice station PS80/237-1. https://doi.org/10.1594/PANGAEA.833356
  13. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar radiance as measured in different depths under sea ice (transmitted radiance) at sea ice station PS80/237-1. https://doi.org/10.1594/PANGAEA.833476
  14. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar irradiance transmitted through snow and sea ice as measured in different depths under sea ice (transmittance) at sea ice station PS80/237-1. https://doi.org/10.1594/PANGAEA.833478
  15. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar radiance transmitted through snow and sea ice as measured in different depths under sea ice (transflectance) at sea ice station PS80/237-1. https://doi.org/10.1594/PANGAEA.833477
  16. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Incident spectral solar irradiance measured above sea ice at sea ice station PS80/237-1. https://doi.org/10.1594/PANGAEA.833474
  17. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Detected aggregates at sea ice station PS80/255-1. https://doi.org/10.1594/PANGAEA.833533
  18. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Upward looking videos recorded with an ROV under sea ice at station PS80/255-1. https://doi.org/10.1594/PANGAEA.833286
  19. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar irradiance as measured in different depths under sea ice (transmitted irradiance) at sea ice station PS80/255-1. https://doi.org/10.1594/PANGAEA.833480
  20. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): ROV navigation parameters recorded at sea ice station PS80/255-1. https://doi.org/10.1594/PANGAEA.833357
  21. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar radiance as measured in different depths under sea ice (transmitted radiance) at sea ice station PS80/255-1. https://doi.org/10.1594/PANGAEA.833481
  22. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar irradiance transmitted through snow and sea ice as measured in different depths under sea ice (transmittance) at sea ice station PS80/255-1. https://doi.org/10.1594/PANGAEA.833483
  23. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar radiance transmitted through snow and sea ice as measured in different depths under sea ice (transflectance) at sea ice station PS80/255-1. https://doi.org/10.1594/PANGAEA.833482
  24. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Incident spectral solar irradiance measured above sea ice at sea ice station PS80/255-1. https://doi.org/10.1594/PANGAEA.833479
  25. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Detected aggregates at sea ice station PS80/323-1. https://doi.org/10.1594/PANGAEA.833534
  26. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Upward looking videos recorded with an ROV under sea ice at station PS80/323-1. https://doi.org/10.1594/PANGAEA.833287
  27. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar irradiance as measured in different depths under sea ice (transmitted irradiance) at sea ice station PS80/323-1. https://doi.org/10.1594/PANGAEA.833485
  28. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): ROV navigation parameters recorded at sea ice station PS80/323-1. https://doi.org/10.1594/PANGAEA.833358
  29. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar radiance as measured in different depths under sea ice (transmitted radiance) at sea ice station PS80/323-1. https://doi.org/10.1594/PANGAEA.833486
  30. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar irradiance transmitted through snow and sea ice as measured in different depths under sea ice (transmittance) at sea ice station PS80/323-1. https://doi.org/10.1594/PANGAEA.833488
  31. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar radiance transmitted through snow and sea ice as measured in different depths under sea ice (transflectance) at sea ice station PS80/323-1. https://doi.org/10.1594/PANGAEA.833487
  32. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Incident spectral solar irradiance measured above sea ice at sea ice station PS80/323-1. https://doi.org/10.1594/PANGAEA.833484
  33. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Detected aggregates at sea ice station PS80/335-1. https://doi.org/10.1594/PANGAEA.833535
  34. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Upward looking videos recorded with an ROV under sea ice at station PS80/335-1. https://doi.org/10.1594/PANGAEA.833288
  35. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar irradiance as measured in different depths under sea ice (transmitted irradiance) at sea ice station PS80/335-1. https://doi.org/10.1594/PANGAEA.833490
  36. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): ROV navigation parameters recorded at sea ice station PS80/335-1. https://doi.org/10.1594/PANGAEA.833359
  37. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar radiance as measured in different depths under sea ice (transmitted radiance) at sea ice station PS80/335-1. https://doi.org/10.1594/PANGAEA.833491
  38. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar irradiance transmitted through snow and sea ice as measured in different depths under sea ice (transmittance) at sea ice station PS80/335-1. https://doi.org/10.1594/PANGAEA.833493
  39. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar radiance transmitted through snow and sea ice as measured in different depths under sea ice (transflectance) at sea ice station PS80/335-1. https://doi.org/10.1594/PANGAEA.833492
  40. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Incident spectral solar irradiance measured above sea ice at sea ice station PS80/335-1. https://doi.org/10.1594/PANGAEA.833489
  41. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Detected aggregates at sea ice station PS80/349-1. https://doi.org/10.1594/PANGAEA.833536
  42. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Upward looking videos recorded with an ROV under sea ice at station PS80/349-1. https://doi.org/10.1594/PANGAEA.833289
  43. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar irradiance as measured in different depths under sea ice (transmitted irradiance) at sea ice station PS80/349-1. https://doi.org/10.1594/PANGAEA.833495
  44. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): ROV navigation parameters recorded at sea ice station PS80/349-1. https://doi.org/10.1594/PANGAEA.833360
  45. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar radiance as measured in different depths under sea ice (transmitted radiance) at sea ice station PS80/349-1. https://doi.org/10.1594/PANGAEA.833496
  46. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar irradiance transmitted through snow and sea ice as measured in different depths under sea ice (transmittance) at sea ice station PS80/349-1. https://doi.org/10.1594/PANGAEA.833498
  47. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar radiance transmitted through snow and sea ice as measured in different depths under sea ice (transflectance) at sea ice station PS80/349-1. https://doi.org/10.1594/PANGAEA.833497
  48. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Incident spectral solar irradiance measured above sea ice at sea ice station PS80/349-1. https://doi.org/10.1594/PANGAEA.833494
  49. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Detected aggregates at sea ice station PS80/360-1. https://doi.org/10.1594/PANGAEA.833537
  50. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Upward looking videos recorded with an ROV under sea ice at station PS80/360-1. https://doi.org/10.1594/PANGAEA.833290
  51. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar irradiance as measured in different depths under sea ice (transmitted irradiance) at sea ice station PS80/360-1. https://doi.org/10.1594/PANGAEA.833500
  52. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): ROV navigation parameters recorded at sea ice station PS80/360-1. https://doi.org/10.1594/PANGAEA.833361
  53. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar radiance as measured in different depths under sea ice (transmitted radiance) at sea ice station PS80/360-1. https://doi.org/10.1594/PANGAEA.833501
  54. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar irradiance transmitted through snow and sea ice as measured in different depths under sea ice (transmittance) at sea ice station PS80/360-1. https://doi.org/10.1594/PANGAEA.833503
  55. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar radiance transmitted through snow and sea ice as measured in different depths under sea ice (transflectance) at sea ice station PS80/360-1. https://doi.org/10.1594/PANGAEA.833502
  56. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Incident spectral solar irradiance measured above sea ice at sea ice station PS80/360-1. https://doi.org/10.1594/PANGAEA.833499
  57. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Detected aggregates at sea ice station PS80/384-1. https://doi.org/10.1594/PANGAEA.833538
  58. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Upward looking videos recorded with an ROV under sea ice at station PS80/384-1. https://doi.org/10.1594/PANGAEA.833291
  59. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar irradiance as measured in different depths under sea ice (transmitted irradiance) at sea ice station PS80/384-1. https://doi.org/10.1594/PANGAEA.833505
  60. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): ROV navigation parameters recorded at sea ice station PS80/384-1. https://doi.org/10.1594/PANGAEA.833362
  61. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Downward spectral solar radiance as measured in different depths under sea ice (transmitted radiance) at sea ice station PS80/384-1. https://doi.org/10.1594/PANGAEA.833506
  62. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar irradiance transmitted through snow and sea ice as measured in different depths under sea ice (transmittance) at sea ice station PS80/384-1. https://doi.org/10.1594/PANGAEA.833508
  63. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Fraction of spectral solar radiance transmitted through snow and sea ice as measured in different depths under sea ice (transflectance) at sea ice station PS80/384-1. https://doi.org/10.1594/PANGAEA.833507
  64. Katlein, C; Fernández-Méndez, M; Wenzhöfer, F et al. (2014): Incident spectral solar irradiance measured above sea ice at sea ice station PS80/384-1. https://doi.org/10.1594/PANGAEA.833504