Potential effects of a resuspension event on the vertical distribution of copepod eggs in the sea bed: a laboratory simulation

1992 ◽  
Vol 114 (2) ◽  
pp. 249-251 ◽  
Author(s):  
N. H. Marcus ◽  
K. Taulbee
1989 ◽  
Vol 40 (5) ◽  
pp. 559 ◽  
Author(s):  
AJ Gabric ◽  
J Parslow

A new analytical model for the vertical distribution of phytoplankton in shallow, turbid waters is presented. The effects of vertical mixing, light-attenuated growth and algal-cell sinking rates are included. The two cases of a finite-depth water column and a mixed layer are investigated. The results for negatively buoyant cells suggest that concentration maxima can occur above the sea bed for either strong or weak mixing in a mixed layer but are always at the bed in finite-depth waters. Large-celled species with high sinking rates are least sustainable in stable water columns, especially a weakly mixed, mixed layer. Conversely, cell sinking rates have little effect on net growth rate when mixing is strong in finite-depth waters. The effect of turbidity on net growth is accentuated under weakly mixed conditions. Comparison with field data shows quite good agreement with the model predictions and underlines the fact that simple analytical tools are often quite adequate when dealing with a sparse experimental data base.


Tellus B ◽  
2011 ◽  
Vol 63 (1) ◽  
Author(s):  
Abhay Devasthale ◽  
Michael Tjernström ◽  
Karl-Göran Karlsson ◽  
Manu Anna Thomas ◽  
Colin Jones ◽  
...  

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Katie E. Miles ◽  
Bryn Hubbard ◽  
Evan S. Miles ◽  
Duncan J. Quincey ◽  
Ann V. Rowan ◽  
...  

AbstractSurface melting of High Mountain Asian debris-covered glaciers shapes the seasonal water supply to millions of people. This melt is strongly influenced by the spatially variable thickness of the supraglacial debris layer, which is itself partially controlled by englacial debris concentration and melt-out. Here, we present measurements of deep englacial debris concentrations from debris-covered Khumbu Glacier, Nepal, based on four borehole optical televiewer logs, each up to 150 m long. The mean borehole englacial debris content is ≤ 0.7% by volume in the glacier’s mid-to-upper ablation area, and increases to 6.4% by volume near the terminus. These concentrations are higher than those reported for other valley glaciers, although those measurements relate to discrete samples while our approach yields a continuous depth profile. The vertical distribution of englacial debris increases with depth, but is also highly variable, which will complicate predictions of future rates of surface melt and debris exhumation at such glaciers.


2021 ◽  
Vol 42 (17) ◽  
pp. 6421-6436
Author(s):  
Sourita Saha ◽  
Som Sharma ◽  
K. Niranjan Kumar ◽  
Prashant Kumar ◽  
Vaidehi Joshi ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document