UK Summer Rainfall - Some notes on the Jetstream.

I've been digging a bit more into record UK rainfall, not a major revelation, but I thought it worth blogging as this blog is essentially my on-line notebook. I don't intend to blog on summer rainfall in the UK again until I've seen what this summer brings.

The PIOMAS late summer anomaly increase.

In recent summers the late summer volume loss in PIOMAS has been less than in the past, why is this?

Met Office - UK's Wettest Winter since 1910

The Met Office have today announced that the winter of 2013/2014 (Dec 2013 to February 2014) is the wettest for the UK since records began (1910). Yet, it's still a week to go before the end of the month, and after a week of relatively settled weather, an unsettled week is forecast to take us into the end of the month.

UK Wet Summers post 2007: How Unusual?

In my mid month miscellanea post earlier today I posted a list of the top ten wettest summers, four of those are years from 2007 to 2013. Just how odd is this?

Mid Monthly Miscellanea: February 2014

Mid February already!

Met Office Chief: "the evidence suggests there is a link to climate change"

The UK is experiencing an exceptionally stormy winter, and Met Office chief scientist Dame Julia Slingo has stated "all the evidence suggests there is a link to climate change." Source. The Met Office have produced a detailed account of their findings with regards the exceptional winter of 2013/14, it's available here.

PIOMAS V2.1

PIOMAS V2.1 has been released, a partial change to the PIOMAS volume data on the previous version, V2.0. The impact of this change is minimal, and only affects recent years (since 2009). It removes a disparity between my gridded calculations and the Main Series monthly and daily timeseries that are released on the PIOMAS site.

PIOMAS January 2014

Dr Zhang and the team at the Polar Science Centre have been good enough to release PIOMAS gridded data for January, I'm too busy to write much but have just produced a set of graphs illustrating current ice state as modelled in the PIOMAS model. I take the results of that model as a pretty good proxy for the actual ice state. I'll update my datasets over the weekend.

PIOMAS V2.1 has been released by the Polar Science Centre due to a software bug. I'm leaving this post as it stands, some of the graphs shown here are updated to V2.1 in the following post, which is an examination of V2.1. Note that all graphs that follow using January data are already using V2.1, only graphs and numbers referring to 2013 cross reference V2.1 and V2.0, but none of the conclusions are affected.

The PIOMAS Spring Volume Loss

In the PIOMAS data there has been a change in the seasonal cycle post 2010, which can be noted as a 'spikiness' in recent years of the Polar Science Group's own PIOMAS anomaly plot, see here. This is an anomaly that needs explaining.