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Archive for December, 2013

Ozone Northern Hemisphere dance

December 7, 2013 Leave a comment
Image

Image processed to show land outlines and grid

Northern hemisphere ozone receives little attention.

Fairly recently a partial view of the north has become available, still incomplete, model output, nevertheless this might be eye opening.

The images used here are from NASA [1]  are tilted partial northern hemisphere. Image left  here is making the geography clear, barely makes the Mediterranean, southern US or Japan.

Fingers of ozone reaching far south has been known for a long time, pre-dates satellites, is rarely mentioned.

Satellite sensing is restricted by how it has to be done: the only proper way is by transmission through the atmosphere, which means from the ground. Reason: measurement uses the difference in absorption between a pair of spectral lines where a light source shining through, daytime the sun, night-time reflected sunlight, the moon, hence remote sensing has no data night side.

(see https://daedalearth.wordpress.com/2013/07/13/stratospheric-ozone-dobson-history-at-oxford/) Read more…

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Categories: Ozone

Met Office reports of day extremes 2013

December 2, 2013 Leave a comment

Over much of 2013 I have been collecting the extremes for a day as reported by the UK Met Office. April up to 1st December.

Example as copied

24 hours ending 2100 on 1 Dec 2013:UK
Highest max 0900-2100 11.7 °C Gt Cumbrae Millport
Lowest max 0900-2100 5.1 °C Okehampton
Lowest min 2100-0900 -4.1 °C Exeter Airport
Highest rainfall 2100-2100 3.2 mm Cluanie Inn
Sunniest 2100-2100 6.8 hours Wittering
Last updated: 2302 on Sun 1 Dec 2013

This might be useful / of interest to a few people so I have processed the information into a flat field spreadsheet form. I considered full Normal form but lets keep things simple, I’ve done the hard part.

Read more…

Categories: Datasets, weather