Both Envisat and Jason I have been showing dropping sea levels for about 3 1/2 years now. Envisat has been showing the drop much longer. Jason II also shows a drop.
About the graph: Neither data set has any of the insidious additional values assigned to the sea levels. Envisat had more data points, so for clarity I removed some to have them more closely match Jason I in time. Vertical axis is in decimeters(for some silly reason I didn’t correct that.) A value of 3.5 was added to each data point for Jason I data for clearer viewing. Data was obtained here. (Click on “Download the data” button.)
Next time you see a group of whinebags having a pity party about the sea levels, laugh at them and show them this.
If and when you do, some other whinebag may complain that the seasonal signal wasn’t removed. And it wasn’t. Here’s why. This is the total Envisat record with the seasonal signal removed.
This is Envisat without the signal removed.
What’s the problem? Envisats data starts 2003.976717 and it ends, 2011.791182. There shouldn’t be any seasonal signal to adjust. The end nearly completes the annual cycle, which coincides with the start of the record set with 8 full cycles! And, yet, they add 0.07 mm/yr.