The last time I posted Envisat’s sea level, I was criticized as selectively displaying certain dates so as to manipulate the outcome. Cherry picking. Specifically, my dates weren’t full cycle and I didn’t include the seasonal adjustment as offered by Aviso. In part, this was a true and legitimate criticism. I only had the data I could work with, so I was hamstrung as to what could and couldn’t be shown. And today, I’m still cherry picking, in a manner of speaking. I acknowledge what the total Envisat record shows, in fact, I’ll display it……
And, once again, I’m not utilizing any “corrections” offered. The GIA is so intellectually dishonest, I won’t be embarrassed by including it. As shown before, the seasonal corrections Aviso offers is in error. They also offer a “Inverted barometer correction”, but I have as yet to be able to find a legitimate reason to include it. Given Aviso’s track record of corrections, I’ll opt to omit it until someone can convince me the correction is legitimate and Aviso’s handling of such a correction can be trusted. In the mean time, we’ll have to wade through with actual measurements……. even after being tuned to our Jasons.
As we can see, there is, indeed, a seasonal signal. As the duration lengthens the seasonal signal becomes less significant. Fortunately, I can include the most current data, and go back and retrieve data that completes the cycle. In other words, there would be no seasonal signal to differentiate. 2011.862646 is the date (and time) of the most recent measurement. So, all I have to do is go back in time several cycles and show what is currently happening! I can go back to 2005.865479. This is six full cycles, so there is no seasonal adjustment to be made.
I would also like to point something out while we’re here. Look at the first measurement on this graph and then look at the second. The second has a date-stamp of 2005.889387. As noted the first date is 316 days into 2005. The next measurement was 324 days into the year. In 8 days the global sea level jumped 3.3mm. Apparently, there are corrections, and then, there are corrections.