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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
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 Collection

  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): Detected aggregates at sea ice station PS80/237-1. https://doi.org/10.1594/PANGAEA.833532
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  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 PS80/255-1. https://doi.org/10.1594/PANGAEA.833480
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  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 PS80/335-1. https://doi.org/10.1594/PANGAEA.833491
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  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 PS80/349-1. https://doi.org/10.1594/PANGAEA.833498
  31. 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
  32. 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
  33. 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
  34. 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
  35. 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
  36. 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
  37. 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
  38. 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
  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 PS80/360-1. https://doi.org/10.1594/PANGAEA.833502
  40. 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
  41. 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
  42. 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
  43. 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
  44. 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
  45. 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
  46. 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
  47. 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
  48. 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
  49. 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
  50. 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
  51. 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
  52. 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
  53. 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
  54. 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
  55. 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
  56. 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
  57. 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
  58. 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
  59. 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
  60. 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
  61. 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
  62. 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
  63. 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
  64. 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