Uanset holdning: Alle kan hjælpe klimaforskerne

...og spændende, det vil jeg se på!

Historiske vejrdata er da meget lidt relevante i klimadebatten

Theis skrev:


Så hvis man kan lide at slå hjerne fra eller foretage meningsfulde overspringshandlinger, så er det bare med at komme i gang.

crank skrev:
Historiske vejrdata er da meget lidt relevante i klimadebatten - vel nærmere med til at fjerne fokus fra de egentlige årsager.

A few people have wondered about how much other old weather data is out there waiting to be rescued.

The answer is: LOTS!

In the UK Met Office archives, there are large numbers of scanned documents from the UK and far beyond, e.g.: http://data.ceda.ac.uk/badc/corral/images/metobs/ for a small sample.

At the UK National Archives in London there are 6 million pages of logbooks from the Royal Navy's voyages all over the world between 1800-1990s - this is the ADM53 collection (http://discovery.nationalarchives.gov.uk/details/r/C1762). The vast majority of these remain unscanned - a project called oldWeather.org transcribed the 1914-1923 from this collection using volunteers.

The US NOAA archives have scanned images from all over the world - examples: ftp://ftp.ncdc.noaa.gov/pub/data/globaldatabank/daily/stage0/FDL/

This is a small fraction of what is out there. Other European countries also have archives, as do many other countries in the world. The ACRE initiative is trying to coordinate international efforts but remains very underfunded: http://www.met-acre.org/data-projects-and-regional-chapters

The obvious question for us is: what next?

Is there enthusiasm for taking the next step and exploring other logbooks? If so, would you prefer to look at more UK data, or go further afield?

I would support taking this project further. Not being from the UK, I have no particular preference for UK data. I would suggest that the next data is whatever you expert consider the most important to get digitalised - e.g. data that would fill the biggest gaps.

kulden-varmen skrev:

crank skrev:
Historiske vejrdata er da meget lidt relevante i klimadebatten - vel nærmere med til at fjerne fokus fra de egentlige årsager.

Du skal da kende klimaets naturlige variation inden at du kan se hvordan CO2 virker

I have also now received the complete PDF documents of the Met Office's Daily Weather Reports for the 1900-1910 period.
https://www.metoffice.gov.uk/learning/library/archive-hidden-treasures/daily-weather-reports and am building the "Weather Rescue 2" website with these. These documents contain twice daily undigitised observations from across Europe from Sweden & Finland in the north to Spain in the south, and from Ireland in the west to Germany in the east. These will give us a much broader view of the weather during this time.

Her er et eksempel på dette datasæt

Will the data be made available?
Certainly. As soon as it has been processed and checked, we will make the data freely available for anyone to use.

Once we've rescued all the weather observations, what are we going to do with them?

The first step will be to publish the data as an academic paper. We will choose an open access journal such as Earth System Science Data or Scientific Data. As well as the pressure, temperatures, rainfall and wind observations, we will also produce estimates of the humidity, derived from the pressure and temperature observations.

We would welcome suggestions on how we might best acknowledge the contributions of all our volunteers in this publication.

Once the data is published we will send copies to the various international weather data archives such as ISPD (pressure), GHCN (rainfall, temperature), ISTI (temperature) and a new European initiative which is collecting all meteorological data. The UK Met Office will also put the data into its MIDAS data archive.

This will ensure the data is available as widely as possible for anyone to analyse and use. For example, the data will be incorporated into the next generation of UK climate observations (called UKCP18), the Berkeley Earth global temperature datasets, and the Twentieth Century Reanalysis.

Highest rainfall in a 24-hour period: 210mm on 2/3 October 1890

Highest hourly rainfall: 33.1mm between midday and 1pm on 10 December 1884

Wettest month: 1228mm in December 1900

Driest month: 33.5mm in September 1894

Coldest temperature: -17.4C at 8am on 6 January 1894

Warmest temperature: 19.1C at 2pm on 28 June 1902

Average temperature on Ben Nevis summit: -0.3C

Average temperature in Fort William: 8.5C

Lowest pressure: 784.7mb at 8.30pm on 26 January 1884. This is almost certainly the lowest surface pressure ever recorded in the UK as routine measurements are no longer taken at the top of Ben Nevis. A weather station was recently installed on the mountain, but it is only temporary.