Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center:
March 2018 turned out to be quite cold, relatively speaking (more on that below). And thus, as expected, volume increased by a lot, especially given that it was relatively low at the end of last month. In fact, with 2278 km3, sea ice volume growth during March was the largest in the 2007-2018 period, well above the average of 1832 km3. This means that the gap with 2017 has widened again, whereas the difference with all other years has become smaller. 2011 is now hot on this year's tail, being just 217 km3 behind. I expect this year to end up having the second lowest maximum on record, but you never know.
Here's how the differences with previous years have evolved from last month:
The 2018 trend line can clearly be seen moving back towards the pack on Wipneus' version of the PIOMAS graph:
Naturally, the trend line on the PIOMAS sea ice volume anomaly graph has shot up, moving away from the linear trend line again, meaning volume loss is slightly less than expected, if one were to extrapolate the data average into the future: