Temperature data is one of our most commonly used meteorological indicators. Before that, we shared with you the average temperature data of cities across the country from 2001 to 2022 on a daily, monthly and yearly basis (see the previous article for details). The original data based on this data is the daily meteorological data of more than 12,000 stations around the world shared by the National Center for Environmental Information (NCEI) under the National Oceanic and Atmospheric Administration (NOAA). The average temperature of the city!
After getting the data, many friends have been asking us if we have the data detailed to the site. This time we will share with you the daily average temperature data specific to the meteorological observation sites around the world from 1929 to 2022! The data is still from the National Center for Environmental Information (NCEI).
The raw data of the daily average temperature downloaded from the NECI official website is in degrees Fahrenheit, and the data format is csv. For the convenience of everyone, we have processed the original data, the unit is converted to Celsius, the format is converted to vector format (shp), and the data coordinate system is GCS_WGS_1984. Taking 2022 as an example, there are 12319 meteorological observation stations in the world. The specific data The processing method will be described in detail below!
The following is a detailed introduction to the data:
01Data preview
Since it is the daily average temperature data, there are more than 94 years, and the number of data items is very large, it is difficult to save all the years in a shp file. We save the data of each year as a shp file, there are 94 years in total, that is, there are 94 shp files! Each file contains the daily average temperature for all weather observation stations around the world for that year. Let's take the daily average temperature data of meteorological observation stations in 2022 as an example to preview:
The data fields include the number of the meteorological observation station (STATION) , the name of the meteorological observation station (NAME), latitude (LATITUDE) and longitude (LONGITUDE) , and daily average temperature data (eg 2022-01-01) .
02 Data source
Data from the National Center for Environmental Information (NCEI) under the National Oceanic and Atmospheric Administration (NOAA), available at: https://www.ncei.noaa.gov/data/global-summary-of-the-day /archive/, including the meteorological data from 1929 to 2022, you can go to this website to download the original data yourself!
03 Handling Instructions
1. Merge processing:
The original csv data downloaded from the NCEI website, each 1 csv is all the temperature of a specific site within a year, recorded by day, but not all 365 days, some more than 300 days, some only a dozen days. We merged the daily average temperature data of all meteorological observation stations involved in each year according to the year, and finally got 94 year-named shp files.
2. Unit conversion:
To convert Fahrenheit to Celsius, the data processing formula is Celsius = (Fahrenheit - 32°F) ÷ 1.8 for conversion.
3. Null value processing:
The null values in the original csv data are filled with floating-point numbers such as 9999.9 or 999.9. During processing, we filter out these floating-point numbers, and the processed Shp corresponds to the null value.
4. Description of the number of stations:
The number of stations varies from year to year. Basically, the newer the year, the more global weather stations there are. There are 12,319 in 2022, and there are fewer weather stations in earlier years.
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