Nomura, Daiki; Nosaka, Yuichi; Akino, Ryota; Schmidt, Katrin; Fong, Allison A; Hoppe, Clara Jule Marie: Dominance of phytoplankton and ice algae in melt pond during expedition PS122/5 (MOSAiC Leg 5) to the central Arctic Ocean [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.973634 (dataset in review)
Abstract:
Samples of microalgae groups, including phytoplankton and ice algae, in melt pond were taken during September during Leg 5 of MOSAiC expedition. Melt pond water was pumped up with a peristaltic pump through a 2-m-long PTFE tube (L/S Pump Tubing, Masterflex, USA) or scooped up in the melt pond with ladle with floating algae aggregates. Ice cores from the pond bottom ice (sample ID #3–6) and melt pond surface ice (sample ID #14) were collected using an ice corer (Mark II coring system, Kovacs Enterprises, Inc., Indianapolis, USA). Also, we sampled small pieces of the bottom ice dislodged and floated to the surface of the melt pond by poking with a ruler (dislodged ice; sample ID #7–11). Ice cores from melt ponds were segmented. Dislodged ice was cut into 0.25 m × 0.25 m size. All ice samples were placed into ice melting bags (Smart bags PA, AAK 5L, GL Sciences Inc., Japan) and melted in the dark at +4°C. Pond water and melt water sample were stored in Lugol's solution (final concentration 10%). The water sample for taxonomic analysis were concentrated for 24 hours by standing the sample tube and removing the supernatant. The cell counting for microalgae community assemblage was examined using a light microscope (Olympus, BH-T, Tokyo, Japan) with 40 × objective and 10 × oculars, and the contribution of each microalgae group to the total cell abundance was calculated. Identification of the microalgae followed Tomas (1997) and Scott and Marchant (2005).
References:
Scott, Fiona J; Marchant, Harvey J (2005): Antarctic Marine Protists. Australian Antarctic Division, 563 pp, https://doi.org/10.1017/S0954102005242906
Tomas, Carmelo R (1997): Identifying Marine Phytoplankton. Elsevier, https://doi.org/10.1016/B978-0-12-693018-4.X5000-9
Project(s):
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AFMOSAiC-1_00: Multidisciplinary drifting Observatory for the Study of Arctic Climate
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_PS122_00: Multidisciplinary drifting Observatory for the Study of Arctic Climate / MOSAiC
Federal Ministry of Education and Research (BMBF), grant/award no. 03F0869A: MOSAiC 1 CiASOM: Verwendung von stabilen Wasserisotopen für ein besseres Verständnis des arktischen Wasserkreislaufs
Japan Society for the Promotion of Science (JSPS), grant/award no. JP18KK0292: Joint research between Germany and Japan on the Arctic moistening
Coverage:
Median Latitude: 88.637803 * Median Longitude: 113.852644 * South-bound Latitude: 88.434937 * West-bound Longitude: 101.648590 * North-bound Latitude: 89.065570 * East-bound Longitude: 117.942670
Date/Time Start: 2020-09-02T00:00:00 * Date/Time End: 2020-09-18T00:00:00
Event(s):
PS122/5_60-61 * Latitude: 88.434939 * Longitude: 117.591517 * Date/Time: 2020-09-02T09:00:00 * O2A Registry URI: registry.o2a-data.de * Location: Arctic Ocean * Campaign: PS122/5 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Chamber for gas sampling (CHAMGAS) * Comment: For water sampling at Meltpond site 4a for before after mixing event by Daiki
PS122/5_61-206 * Latitude: 88.771368 * Longitude: 101.210749 * Date/Time: 2020-09-12T10:00:01 * O2A Registry URI: registry.o2a-data.de * Location: Arctic Ocean * Campaign: PS122/5 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Ice corer (IC) * Comment: St4b melt pond ice sampling by Daiki et al
PS122/5_62-35 * Latitude: 89.006059 * Longitude: 101.648593 * Date/Time: 2020-09-14T10:00:00 * O2A Registry URI: registry.o2a-data.de * Location: Arctic Ocean * Campaign: PS122/5 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Ice corer (IC) * Comment: Meltpond 4a afternoon Daiki, Nikolai and Egor; Ice core for temperature; Ice core for salinity; Ice core for optics; Ice core for texture
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Nomura, Daiki | |||
| 2 | Identification | ID | Nomura, Daiki | |||
| 3 | LATITUDE | Latitude | Nomura, Daiki | Geocode | ||
| 4 | LONGITUDE | Longitude | Nomura, Daiki | Geocode | ||
| 5 | DATE/TIME | Date/Time | Nomura, Daiki | Geocode | ||
| 6 | Station label | Station | Nomura, Daiki | |||
| 7 | Sample type | Samp type | Nomura, Daiki | |||
| 8 | Melosira spp. | Melosira spp. | % | Nomura, Daiki | ||
| 9 | Navicula spp. | Navicula spp. | % | Nomura, Daiki | ||
| 10 | Fragilariopsis spp. | Fragilariopsis spp. | % | Nomura, Daiki | ||
| 11 | Thalassiosira spp. | Thalassiosira spp. | % | Nomura, Daiki | ||
| 12 | Nitzschia spp. | Nitzschia spp. | % | Nomura, Daiki | ||
| 13 | Pseudonitzschia spp. | Pseudonitzschia spp. | % | Nomura, Daiki | ||
| 14 | Chaetoceros spp. | Chaetoceros spp. | % | Nomura, Daiki | ||
| 15 | Asteromphalus sp. | Asteromphalus sp. | % | Nomura, Daiki | ||
| 16 | Phaeocystis spp. | Phaeocystis spp. | % | Nomura, Daiki | ||
| 17 | Dinoflagellates | Dinofl | % | Nomura, Daiki | Vegetative cell & resting cyst | |
| 18 | Dictyocha speculum | D. speculum | % | Nomura, Daiki |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
224 data points