You have the option to manually calibrate the current Elevation on your Karoo.
By manually inputting your current elevation, you will reset your Barometer base value.
On the Home screen, click on the "Settings" app.
Scroll to the bottom of the page.
Tap on "Elevation Calibration"
Select "Manual". Then, tap on "INPUT ELEVATION"
Enter the Elevation manually.
Your current elevation can be found from sources like https://www.whatismyelevation.com/
Note: Elevation is recorded using the Barometer in the device. The Barometer works based on the atmospheric pressure in air to compute your elevation. The elevation recorded this way maybe affected by weather as pressure varies throughout the day.