väderdata

Väderdata refers to observations, measurements, and historical records that describe atmospheric conditions. It includes in situ measurements, remote sensing products, and derived data used for weather forecasting, climate research, and related applications.

Common variables include surface temperature, precipitation, humidity, air pressure, wind speed and direction, cloud cover, and solar radiation. Additional products come from radar rainfall estimates, satellites, and atmospheric profiles obtained from radiosondes and ships.

Data are collected by national meteorological services, research institutions, and commercial networks through ground stations, weather balloons, ships and buoys, radar, and satellites. International exchange is coordinated by the World Meteorological Organization and regional meteor networks to ensure global coverage.

Quality control involves automated checks, calibration, homogenization, bias correction, and metadata validation. Data are stored in archives and shared in standard formats such as netCDF, GRIB, BUFR, and CSV, with documentation on provenance and uncertainty.

Väderdata underpins numerical weather prediction, climate monitoring, agriculture, aviation, energy, and environmental research. Many meteorological agencies provide open access to data under licensing terms that allow reuse with attribution.

Challenges include uneven spatial coverage, gaps in remote areas, data latency, and the need for interoperable data formats and APIs. Emerging sources, like crowdsourced observations and higher-resolution satellite products, aim to improve coverage and accuracy.