Significance levels derived by linear modeling for impacta of hemisphere (Arctic/Antarctic), ice type (landfast/pack) and season (month-of-year) on photosynthetic parameters, determined in two layersb of the ice column. DOI: https://doi.org/10.1525/elementa.267.t5
| Parameter . | Ice layer . | Hemisphere (H) . | Ice Type (T) . | Month (M) . | M*T . | |
|---|---|---|---|---|---|---|
| . | . | Combined . | Combined . | (Ant)arctic . | Arctic . | Antarctic . |
| Pmax | Surface | n.s.c | n.s. | n.s. | n.s. | n.s. |
| Interior | n.d.d | n.d. | n.d. | n.d. | n.d. | |
| Bottom | n.s. | p < 0.005 | n.s. | p < 0.005 | n.s. | |
| α | Surface | p < 0.05 | n.s. | n.s. | n.s. | n.s. |
| Interior | n.d. | n.d. | n.d. | n.d. | n.d. | |
| Bottom | n.s. | p < 0.0005 | n.s. | p < 0.0005 | n.s. | |
| Ik | Surface | p < 0.05 | p < 0.05 | n.s. | n.s. | n.s. |
| Interior | n.d. | n.d. | n.d. | n.d. | n.d. | |
| Bottom | n.s. | n.s. | n.s. | n.s. | n.s. | |
| Parameter . | Ice layer . | Hemisphere (H) . | Ice Type (T) . | Month (M) . | M*T . | |
|---|---|---|---|---|---|---|
| . | . | Combined . | Combined . | (Ant)arctic . | Arctic . | Antarctic . |
| Pmax | Surface | n.s.c | n.s. | n.s. | n.s. | n.s. |
| Interior | n.d.d | n.d. | n.d. | n.d. | n.d. | |
| Bottom | n.s. | p < 0.005 | n.s. | p < 0.005 | n.s. | |
| α | Surface | p < 0.05 | n.s. | n.s. | n.s. | n.s. |
| Interior | n.d. | n.d. | n.d. | n.d. | n.d. | |
| Bottom | n.s. | p < 0.0005 | n.s. | p < 0.0005 | n.s. | |
| Ik | Surface | p < 0.05 | p < 0.05 | n.s. | n.s. | n.s. |
| Interior | n.d. | n.d. | n.d. | n.d. | n.d. | |
| Bottom | n.s. | n.s. | n.s. | n.s. | n.s. | |
a The interaction between the factors hemisphere and ice type was also tested but never found to be significant (p > 0.05).
b The interior layer could not be included in the analyses due to the limited number of data.
c Not significant (p > 0.05).
d Not determined.