Similarity assessment and adjustment of integrated temperature databases. Cuyo region, Argentina

BASTIDAS MEJÍA, LUIS BERNARDO; VICH, ALBERTO ISMAEL JUAN; PICCOLO, MARÍA CINTIA

INVESTIGACIONES GEOGRáFICAS

Instituto de Geografía. UNAM

Año: 2021

0188-4611

Given the frequent spatial-temporal limitations and deficiencies of instrumental meteorological records, the use of alternative information sources, such as integrated databases, is important for analyses and studies of diverse nature. The research aim was to evaluate the accuracy of integrated databases of monthly temperature, belonging to Clima of Research Unit, the University of Delaware and Global Historícal Climatology Network, gridded with a pixel size of 3,098.01 km2 (0.5° x 0.5°), the surface area of 51,802.5 km2 and temporary length of22 years (1993-2014), through the modified structural similarity index (mSSIM). The study area is located in central-western Argentina (between 30° and 35° S, and 71 ° and 66° W). The UniversiryofDelaware grid showed the best fit of the data series from 1 O weather stations located in the study area. Therefore, a proposal was presented to increase similarity indices, especially for chose cells without instrumental reference information. The study determined that by applying chis modification, the gridded datasets increases the simílarity of the measured data, especially in mountainous areas, where originally there were differences of more chan 7.5 °C between the gridded data and observed one. The proposal decreases these differences to average values below 1 °C. The use and subsequent adjustment of these integrated databases allows access to informarían in areas wichout meteorological records.