Density-Driven Circulation and Water Masses

16 Jun Density-Driven Circulation and Water Masses

Question
I need help with the investigation manual 6b:

Density-Driven Circulation and Water Masses

Question 1
At a depth of 50 m, the temperature was about ____________ °C.

14.6
16.0
17.5
1 points

Question 2
The salinity at 50 m was __________ .

35.3
35.7
36.0
1 points

Question 3
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
1 points

Question 4
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
1 points

Question 5
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
1 points

Question 6
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
1 points

Question 7
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.

increased

decreased

1 points

Question 8
The water conditions at 475 m fell near the ranges of temperature and salinity identified as a(n) _________ mass.

NACSW
MIW
NADW
AAIW
AABW

1 points

Question 9
The water conditions at 970 m fell within the ranges of temperature and salinity identified as a(n) __________ mass.

NACSW
MIW
NADW
AAIW
AABW

1 points

Question 10
The water conditions at 1940 m fell near the ranges of temperature and salinity identified as a(n) ___________ mass.

NACSW

MIW

NADW

AAIW

AABW

1 points

Question 11
This is the origin of the _________ sample that you have identified.

North Atlantic Deep Water

Mediterranean Intermediate Water

1 points

Question 12
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?

yes

no

1 points

Question 13
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.

1

10

100

1,000

10,000

1 points

Question 14
A major mechanism whereby the density of surface waters at high latitudes is increased is by __________ .

cooling

heating

1 points

Question 15
The density of surface water at any latitude can be increased by _______ .

more evaporation than precipitation

more precipitation than evaporation

1 points

Question 16
The ________ map displays what appears to be a plume of higher salinity water extending into the Atlantic from the Strait of Gibraltar.

300 m

1000 m

1 points

Question 17
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

1 points

Question 18
The map shows that the highest sea surface salinity values occur in the _________ portion of the Mediterranean Sea.

eastern

western

1 points

Question 19
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.

less than

equal to

greater than

1 points

Question 20
Hence, the total input of water from all sources into the Mediterranean must ___________ the total output of water.

be greater than

equal

be less than