Months

Global Temperatures – February 2023

Five out of the seven Met Services around the world have finally published their estimated global temperature anomalies for February 2023. I swear they get slower at updating their estimates each year. The Europeans are always first off the mark to report these days, but the slowest by far are the UKMOUKMO The Meteorological Office is the United Kingdom's national weather service. It is an executive agency and trading fund of the Department for Business, Energy and Industrial Strategy, who have only just published their estimate for January. The comparison graph (above) shows that the weak third dip in anomalies that started in 2016 has now all but fizzled out. Now that the double dip La NinaLa Niña La Niña is an oceanic and atmospheric phenomenon that is the colder counterpart of El Niño, as part of the broader El Niño–Southern Oscillation climate pattern. The name La Niña originates from Spanish for "the girl", by analogy to El Niño, meaning "the boy". In the past, it was also called an anti-El Niño[1] and El Viejo, meaning "the old man." event has come to an abrupt end, and world ocean SSTSST Sea Surface Temperatures at record highs, you can only expect global anomalies start to rocket through the rest of 2023.

ENSO, February, Global Temperatures, SST

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February 2023 – Global Temperatures

Global temperatures in February 2023 in my DIYDIY Do It Yourself Global temperature’s series were the fourth warmest since 1948. The 365 day mean temperature (see below), after flatlining since last spring is also showing signs of surging upwards despite the ongoing La NinaLa Niña La Niña is an oceanic and atmospheric phenomenon that is the colder counterpart of El Niño, as part of the broader El Niño–Southern Oscillation climate pattern. The name La Niña originates from Spanish for "the girl", by analogy to El Niño, meaning "the boy". In the past, it was also called an anti-El Niño[1] and El Viejo, meaning "the old man." trying to keep it in check.

The main driver behind this nascent surge in global temperatures seems to be rapid warming in the last few months of the northern subtropics despite a continued fall in temperatures at the tropics fueled by ENSOENSO El Niño–Southern Oscillation is an irregular periodic variation in winds and sea surface temperatures over the tropical eastern Pacific Ocean, affecting the climate of much of the tropics and subtropics. The warming phase of the sea temperature is known as El Niño and the cooling phase as La Niña.. This is the third surge in temperatures in the northern subtropics in recent years, the others were in 2016 and 2020, but the magnitude of this one might top them both despite the recent SSWSSW A sudden stratospheric warming (SSW) is an event in which polar stratospheric temperatures rise by as much as 50 °C in the course of a few days. The warming is preceded by a slowing then reversal of the westerly winds in the stratospheric polar vortex. SSWs occur about six times per decade in the northern hemisphere, and about once every 20-30 years in the southern hemisphere. event.

February, Global Temperatures

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February 2023 exceptionally anticyclonic?

Don’t get the idea that the positive MSLPMSLP Mean sea level pressure is the pressure at sea level, or, when measured at a given elevation on land, the station pressure reduced to sea level assuming an isothermal layer at the station temperature. anomalies across the SW of England of +13.8 hPahPa A Hectopascal is the SI unit of pressure and identical to the Millibar so far this February are in anyway exceptional – on looking at all February’s back to 1948 using reanalysis data, I think I can safely say it’s not. Put it down to my naivety, I never realised just how varied the month of February, or any month for that matter, can be in IONAIONA Islands Of North Atlantic. Yes I know there's an island called Iona, but this is so I don't have to use the term 'British Isles' when referring to the whole of Ireland and the UK.. Take a look at the very anticyclonic nature and anomalies of Februaries in 1959 and 2012 are for example, or the anomalies and AEAE Anticyclonic Easterly of 1986, but there I’m straying off topic.

February, Pressure

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January 2023 – Weather Summary

Temperatures were close to average in the north of Scotland during January, but it was a little duller than average (84%), with precipitation close to average (96%). I’m not at all convinced that the AWSAWS Automatic Weather Station rain gauges in our part of the Highlands picked up and melted all the snow they collected during the snowy spell in the third week though.

Climate, January

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Coldest December since 2010 and fourth coldest since 1884

Dear Diary
We are more or less halfway through December 2022 now, and the latest mean temperatures for the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. (-3.49°C estimated) indicate that currently 2022 is the coldest since 2010 (the coldest December on record), and the fourth coldest since 1884 behind 2010, 1981 and 1890. Of course there is the matter of the second half of the month to come, and these low values are bound to take a big knock early next week as very mild air is set to make a temporary return.

Cold, December

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December 2010 v 2022

Dear Diary
I thought I’d take a look back at how the start of this December (2022) compares with that of 2010, the coldest December in the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. in the gridded data series that extends back to 1884. I’m afraid it’s no contest so far, at least in the first eleven days of the month. It’s funny living in Devon as we did in 2010, it didn’t feel at all like it was going to end up the coldest December on record. We certainly had a couple of falls of snow, but the snow wasn’t as powdery, or drift as it did in the intense cold wave of January 1987. I’m beginning to sound like that episode of Vicar of Dibley now so I’ll stop.

Cold, December, Snow

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November 2022 – Mean Pressure & Anomalies

Dear Diary,
It’s no wonder that November 2022 was both windy, wet and mild across IONAIONA Islands Of North Atlantic. Yes I know there's an island called Iona, but this is so I don't have to use the term 'British Isles' when referring to the whole of Ireland and the UK.. The Icelandic low was over 19 hPahPa A Hectopascal is the SI unit of pressure and identical to the Millibar lower and a little further to the SW than usual, whilst the Azores high was 2 hPa higher than the LTALTA Long Term Average. This is usually defined as a 30 year period by the WMO., which squeezed the SW flow even tighter. Pressure was close to 10 hPa above average for the month across northern Scandinavia.

November, Pressure

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November 2022 – Weather Summary

Dear Diary,
I swear the Met OfficeUKMO The Meteorological Office is the United Kingdom's national weather service. It is an executive agency and trading fund of the Department for Business, Energy and Industrial Strategy are getting faster at publishing these charts and gridded climate data. You always had to wait at least a couple of days in years gone by but now they’re instantly available.

November

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