Station-mode series are present in HISTALP as “homogenised” and as “original”. All other datamodes are available as homogenised only. Station-mode series are absolute series in the physical unit of the respective climate parameter.

Original series (ori) usually have been subject to preliminary quality checks and corrections. They usually relate to the respective standard procedures defined in weather services for the publication of climate data, which are higher than those in international realtime exchange for forecasting. But they refer to the respective metadata background (location, instruments, surroundings,…) given for the respective measuring time.

Homogenised series (hom) have been subject to the HISTALP homogenisation procedures which try to detect and eliminate non climatic breaks and outliers (Auer et al, 2007 , chapt.3).
Please note that hom-series are “homogenised” in the described way but are not necessarily “homogeneous” (= without any non-climatic information). Our hom series are nearer to “the truth” in respect to climate variability and trends but they are not (and never will be) “the truth”. We therefore try to continuously further improve the hom-series. One example is the reduction of an “early instrumental warm bias” (Böhm et al., 2009 ) which significantly changed the long temperature hom-series from version 2007 to version 2008. Another is the application of a systematic outlier detection and correction procedure (developed and applied on air-pressure, temperature and precipitation already) on sunshine series in 2008.  So we recommend replacing the entire series and not only the recent year when a new update is available.

Austrian hom- and ori-station-mode-series are downloadable for non-profit research without restrictions.Hom-files from Switzerland require the permission of MeteoSwiss, hom-files from all other national subgroups require a respective short notice about the use to the national dataproviders and to the HISTALP-mamagement. We ask for acknowledging the using of HISTALP series in publications. The respective recent reference publication is Auer et al, 2007 .
Statnet-development gives the temporal evolution of the HISTALP station-mode network density.

Seasonal and annual mean series of the station-mode series may be viewed, countrywise in the Station mode gallery - also the Downloadlinks can be found there.

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