attributeSubsurface TemperatureAttribute Error ChecksT set to missing if greter then 99.99ÿ° or less then -9.0ÿ°.T changes less then 5ÿ°C from previous day; vertical gradient between adjacent sensors checked. T conforms to the climatological values for the current quarter (+/- 3 s.d. of 90-day mean)Visual inspection of T profiles