Quality control and filling of daily temperature and precipitation time series in Colombia

During the last several years, there has been an increase in the monitoring of meteorological phenomena. For accurate analysis of the spatial and temporal variability of precipitation as well as air temperature, recorded observations must be trustworthy. Therefore, one must implement effective methods for assuring data quality. This paper implements meteorological data quality controls using open-source Python code. We implemented six types of automatic quality-control processes for climatic data series. This work also introduces a quality index for meteorological time series data and uses three-dimensional kriging to fill in missing data. We apply these methods to daily historical data from 1980 to 2019 from the Institute of Hydrology, Meteorology, and Environmental Studies of Colombia. Applying the quality-control process to the available meteorological stations allows us to validate more than 90 % of the time series. We find that approximately 6.4 %, 4.4 %, 5.4 %, and 5.5 % of the data are flagged as atypical values in the time series of minimum temperature, mean temperature, maximum temperature, and precipitation, respectively. We verified the accuracy of the quality-control procedures by introducing multiplicative random errors and computing the probabilities of false positive and false negative errors. This procedure emphasizes the relationships between neighboring meteorological stations to detect errors in the data, even if they belong to different climatic regions. This analysis also implements a method of reconstructing missing data in the absence of a trustworthy reference time series.

Bibliographic Details

Main Authors:	Teran Chaves, Cesar Augusto, Duarte Carvajalino, Julio Martin, Polo Murcia, Sonia Mercedes
Format:	article biblioteca
Language:	eng
Published:	Schweizerbart'sche Verlagsbuchhandlung 2021-07-02
Subjects:	Recursos hídricos y su ordenación - P10, Clima, Análisis espacial, Recursos hídricos, Transversal, http://aims.fao.org/aos/agrovoc/c_1665, http://aims.fao.org/aos/agrovoc/c_40da9d3b, http://aims.fao.org/aos/agrovoc/c_8325,
Online Access:	https://www.schweizerbart.de/papers/metz/detail/30/100139/Quality_control_and_filling_of_daily_temperature_and_precipitation_time_series_in_Colombia http://hdl.handle.net/20.500.12324/38927
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