Seasonal and Interannual
Variations in Hydrographic
Distributions in Marguerite Bay and Environs
| Show thermohaline properties from 2002 cruises | |
| Describe circulation from 2002 cruises | |
| Compare 2002 patterns with those from 2001 cruises | |
| Preliminary estimates of exchange | |
| Summary of circulation characteristics |
| For 2001 cruises – heat content in upper waters was negative and in deeper waters was positive | |
| Indicates a net heat loss from surface | |
| Heat source in bottom waters – CDW | |
| Difference between two cruises was negative over | |
| entire water column (-0.000342 J/m3/day) - mostly from surface cooling | |
| Little difference in bottom water heat content between two cruises – suggests continual input of warm water | |
| Multiple pathways for CDW to get onto shelf at depth | |
| See effect of warm deep water in surface | |
| Appears to be gyre circulation in northern part of study region | |
| Inshore coastal current seen in 2001 not as apparent in 2002 | |
| Calculate heat change from all cruises | |
| Calculate volume change of warm and cool water between cruises – flushing rates/turnover times for shelf | |
| Heating/cooling differences over the study area may show regions of polynya formation | |
| Calculate the contribution of Lower CDW to warm water on shelf | |
| Topographic mixing effects on breaching of Winter Water layer |