Gradient, Negative: 

 Gradient, Positive: 



Gradient, Temperature: 



Grid: 



Gross Changes: 



Hysteresis: 



Independent Error: 

 Injection Temperature: 

 Instrument Deviation: 

 Instrument Error: 

 Instrument Precision: 

 Instrument Reproducibility : 

 Instrument Set: 

 Interpolation: 



Isodepth Chart: 

 Isodepth Line: 



Isodepth Profile: 

 Isotherm: 



Isothermal Profile: 



Keying Bathythermograms : 



Dependent variable decreases with increasing independent 

 variable. As applied to the BTgm, it represents a decrease 

 in temperature with increase in depth. 



Dependent Variable increases with increasing independent 

 variable. As applied to the BTgm, it represents an increase 

 in temperature with increase in depth. 



Rate of change of temperature with change of depth of the 

 ocean. 



See Bathythermograph Grid. 



Changes in conditions of the ocean which are of an order of 

 magnitude greater than the thermal microstructural changes 

 which may occur. 



H 



As applied to Bathythermography only, hysteresis represents 

 the lack of the uptrace to follow the downtrace, resulting in 

 a typical hysteresis loop. Such loop resembles a new moon 

 or parallel curves that converge at both ends. 



I 



See Error, Independent. 



See Temperature, Injection. 



See Deviation, Instrument. 



See Error, Instrument. 



See Precision, Instrument. 



See Reproducibility, Instrument. 



See Set. 



Method of predicting the location of a point or points on a 

 graph by assuming the data on either side of the interpolated 

 region closely follow a smooth curve. 



See Profile, Isodepth. 



Line connecting points of equal depth. Usually such a line 

 represents temperature versus time or distance at a con- 

 stant depth. 



See Profile, Isodepth. 



Line connecting points of equal temperature. Usually such 

 a line represents depth versus time or distance at constant 

 temperature. 



See Profile, Isothermal. 



K 



Process of relating the reference temperatures of a series 

 of BTgms so as to compare the changes from BTgm to BTgm 

 without being subject to the errors involved in establishing 

 and maintaining these reference temperatures. 



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