«It is clear that significant El Nino events can and do cause upward step changes in Ocean Heat Content. (wattsupwiththat.com)
In the absence of such revelation, the teacher has to practice the assessor's art: find out what students know and can do — and lead each to the next upward step. (ascd.org)
The step in January 2000 is clearly visible and results in an erroneous upward step of about 0.18 - 0.19 deg C. in the average of all unlit stations. (climateaudit.org)