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PHYSICAL OCEANOGRAPHY

机译：物理海洋学

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Estimation of turbulence intensity with a fast-response thermistor is examined by comparing the energy dissipation rate eT from a Fastip Probe, model 07 (FP07), thermistor with eT from a shear probe, both of which are attached to a free-fall microstructure profiler with the fall rate of 0.6-0.7 m s1. Temperature gradient spectra corrected with previously introduced frequency response functions represented by a single-pole low-pass filter yields eT with a bias that strongly depends on turbulence intensity. Meanwhile, the correction with the form of a double-pole low-pass filter derives less bias than of single-pole low-pass filter. The rate eT is compatible with es when the double-pole correction with the time constant of 3 x 10-3 s is applied, and 68% of eT data are within a factor of 2.8 of eT in the wide range of es = 1010-3 X lO7 Wkg1. The rate eT is still compatible with eT even in the anisotropy range, where the buoyancy Reynolds number I = e/(v ?N2)is 20-100. Turbulence estimation from the fast-response thermistor is thus confirmed to be valid in this range by applying the appropriate correction to temperature gradient spectra. Measurements with fast-response thermistors, which have not been common because of their poor frequency response, are less sensitive to the vibration of profilers than those with shear probes. Hence, measurements could be available when a fast-response thermistor is attached to a CTD frame or a float, which extends the possibility of obtaining much more turbulence data in deep and wide oceans.
机译：通过比较快速反应型热敏电阻的湍流强度估算值，方法是将Fastip型号07（FP07）的能量耗散率eT与剪切型探头的eT的热敏电阻进行比较，两者均与自由下落的微结构轮廓仪相连下降速度为0.6-0.7 m s1。用单极点低通滤波器代表的先前引入的频率响应函数校正的温度梯度谱产生的eT的偏差在很大程度上取决于湍流强度。同时，与单极低通滤波器相比，双极低通滤波器形式的校正产生的偏置较小。当应用时间常数为3 x 10-3 s的双极校正时，eT速率与es兼容，并且在es = 1010-的宽范围内，eT数据的68％处于eT的2.8倍之内。 3 X 10 7公斤1。即使在各向异性范围内，eT率仍与eT兼容，其中浮力雷诺数I = e /（v？N2）为20-100。因此，通过对温度梯度谱进行适当的校正，可以确认快速响应热敏电阻的湍流估计在该范围内是有效的。使用快速响应的热敏电阻进行测量（由于其频率响应较差，因此并不常见）对轮廓分析仪的振动不如使用剪切探头的测量敏感。因此，当将快速响应的热敏电阻连接到CTD框架或浮子上时，就可以进行测量，这扩大了在深海和大洋中获得更多湍流数据的可能性。

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    《Oceanographic Literature Review》 |2017年第1期|1-27|共27页
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