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:
As usual, the minimum was reached during September, and as with other data sets (extent and area), this year's minimum was second lowest on record. PIOMAS bottomed out at 4058 km3 on 14 September, which is 244 km3 lower than 2011 and 385 km3 higher than 2012. In total, 18,432 km3 of sea ice volume was lost, which is the fourth highest amount in the 2007-2019 period. What is interesting to note, is that the three years that lost more volume all started out with a lot more ice than 2019: As can be seen on the PIOMAS Daily Arctic Ice Volume graph, the trend line quickly shot up after the minimum was reached, though 2019 is still second. Overall, September saw an increase of 398 km3, which is the highest increase in the 2007-2019 period (the average is 1 km3). This means that 2012 increased its lead over 2019, and all the other years crept closer.
Here's how the differences with previous years have evolved from last month:
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