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Quality control and homogeneity of Turkish precipitation data

✍ Scribed by Ozan Mert Göktürk; Deniz Bozkurt; Ömer Lütfi Şen; Mehmet Karaca

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
578 KB
Volume
22
Category
Article
ISSN
0885-6087

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✦ Synopsis

Abstract

Outlier trimming and homogeneity checking/correction were performed on the monthly precipitation time series of various lengths from 267 stations in Turkey. Outlier values are usually found during dry summer months, and are concentrated mostly over the southern parts of the country, where the dry period is most pronounced, implying natural extremes rather than wrong measurements. Homogeneity analysis was done using the Standard Normal Homogeneity Test, on an individual monthly basis, which led to many non‐testable series due to lack of reference stations, especially during summer months. Yet, remaining testable months were usually helpful for the assessment of homogenity, revealing a well distributed set of stations that proved to be homogeneous. There were still a number of stations which either could not be tested efficiently, or were classified as inhomogeneous. Lack of metadata is argued to be largely responsible for inefficient homogeneity testing. Copyright © 2008 John Wiley & Sons, Ltd.

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