I need help with the investigation manual 6b:
Density-Driven Circulation and Water Masses
At a depth of 50 m, the temperature was about ____________ °C.
14.6 16.0 17.5
The salinity at 50 m was __________ .
35.3 35.7 36.0
The temperature and salinity values at a depth of 475 m were about __________ , respectively.
11.1 °C and 35.55 13.5 °C and 35.25 14.2 °C and 35.45
At 970 m, the temperature and salinity were about ___________ , respectively.
8.5 C and 35.4 9.7 C and 35.25 10.5 C and 35.95
The 1940 m temperature and salinity values were about __________, respectively.
5.1 C and 35.2 4.0 C and 36.4 3.8 C and 35.0
According to the T-S diagram, the density of the 50m seawater sample you plotted is approximately _________ g/cm3.
1.0263 1.0270 1.0274
Based on the positions of the different water samples you plotted on the T-S diagram relative to the isopycnals, seawater density at this site __________ with increasing depth.
The water conditions at 475 m fell near the ranges of temperature and salinity identified as a(n) _________ mass.
NACSW MIW NADW AAIW
The water conditions at 970 m fell within the ranges of temperature and salinity identified as a(n) __________ mass.
NACSW MIW NADW AAIW
The water conditions at 1940 m fell near the ranges of temperature and salinity identified as a(n) ___________ mass.
This is the origin of the _________ sample that you have identified.
North Atlantic Deep Water
Mediterranean Intermediate Water
Does your identification of the sample determined by use of the T-S diagram conform to the printed identification of these depths in Figure 5?
At this speed, to travel the approximately 9000 km distance from its Antarctic source area to 40 degrees N would take a density-driven AABW current close to __________ years.
A major mechanism whereby the density of surface waters at high latitudes is increased is by __________ .
The density of surface water at any latitude can be increased by _______ .
more evaporation than precipitation
more precipitation than evaporation
The ________ map displays what appears to be a plume of higher salinity water extending into the Atlantic from the Strait of Gibraltar.
Based on the reddest portion of the high salinity plume, it appears that from its entry point to the Atlantic the MIW water tends to flow most strongly to the _______ .
left and lower latitudes
right and higher latitudes
The map shows that the highest sea surface salinity values occur in the _________ portion of the Mediterranean Sea.
The salinity of the surface water changes because the rate of evaporation from the sea surface is _________ the addition of fresh water through the combination of precipitation and runoff from land.
Hence, the total input of water from all sources into the Mediterranean must ___________ the total output of water.
be greater than
be less than