This mid-winter casting showed a shallow surface layer 200 m or so thick with ______ salinity water compared to waters immediately below the surface layer. Greater heating during the longer daily periods of spring and summer sunlight and more precipitation than evaporation or meltwater probably explain the contrasts between surface and sub-surface temperatures and salinities. a.colder and lower b.warmer and lower c.warmer and higher d.colder and higher

Applications and Investigations in Earth Science (9th Edition)
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Chapter1: The Study Of Minerals
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This mid-winter casting showed a shallow surface layer 200 m or so thick with ______ salinity water compared to waters immediately below the surface layer. Greater heating during the longer daily periods of spring and summer sunlight and more precipitation than evaporation or meltwater probably explain the contrasts between surface and sub-surface temperatures and salinities.
a.colder and lower
b.warmer and lower
c.warmer and higher
d.colder and higher

Figure 13B-3 displays the vertical profiles of temperature (°C) and salinity (dissolved salt in psu, or practical salinity units) acquired by Float 6901566 during its 169th
cycle, ascending from about 2000 dbar (decibar) to the ocean surface on 5 January 2019. [Recall from Investigation 3A that ocean water 1 m in depth exerts a pressure of
1 dbar. Consequently, a decibar pressure scale is numerically equivalent to water depth in meters. For the purposes of this investigation, the vertical scale of graphed
profiles will be discussed in meters depth. In the ascent just described, the float rose from a depth of 2000 m.]
Float 6901566, Cycle #169, 15/01/2019
Practical salinity - psu
Sea temperature - degree.Celsius
4.50
J.25
3.50
375
4.00
4.25
4.75
34.70
34.75
34.10
34.85
34.90
250
250
50
750
750
1,000
1,000
1,250
1,250
1,500
1,500
1,750
1,750
2,000
2,000
Figure 13B-3. Vertical profiles of temperature in °C (left) and salinity in psu (right) for Float 6901566 on 5 January 2019. [Coriolis Operational Oceanography]
egpap - aunsseud ees
Sea pressure - decibar
Transcribed Image Text:Figure 13B-3 displays the vertical profiles of temperature (°C) and salinity (dissolved salt in psu, or practical salinity units) acquired by Float 6901566 during its 169th cycle, ascending from about 2000 dbar (decibar) to the ocean surface on 5 January 2019. [Recall from Investigation 3A that ocean water 1 m in depth exerts a pressure of 1 dbar. Consequently, a decibar pressure scale is numerically equivalent to water depth in meters. For the purposes of this investigation, the vertical scale of graphed profiles will be discussed in meters depth. In the ascent just described, the float rose from a depth of 2000 m.] Float 6901566, Cycle #169, 15/01/2019 Practical salinity - psu Sea temperature - degree.Celsius 4.50 J.25 3.50 375 4.00 4.25 4.75 34.70 34.75 34.10 34.85 34.90 250 250 50 750 750 1,000 1,000 1,250 1,250 1,500 1,500 1,750 1,750 2,000 2,000 Figure 13B-3. Vertical profiles of temperature in °C (left) and salinity in psu (right) for Float 6901566 on 5 January 2019. [Coriolis Operational Oceanography] egpap - aunsseud ees Sea pressure - decibar
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