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. 2023 Jun 24;10:408. doi: 10.1038/s41597-023-02308-7

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© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2023

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Fig. 12 — The i-index to represent the quality of the ITL depth determination. (a) ITL not existence or ITL in existence, but not identified (h_T = 0). (b) Identified ITL depth shallower than the real ITL depth. (c) Perfectly identified ITL depth. (d) Identified ITL depth deeper than the real ITL depth. (e) Identified ITL depth at z_(0.7), i.e., thermocline not existence. Here, the ITL depth is marked by a circle. The thick line in each figure is a single linear function fitted to the temperature profile data.