12th Seminar for Homogenization and Quality Control in Climatological Databases and 7th Interpolation Conference followed by the Danube-Adapt Project meeting

5–8 May 2026 (dates may change depending on the number of submissions)
Headquarters of the Hungarian Meteorological Service, Budapest, Hungary
Address: 1024 Budapest, Kitaibel Pál utca 1.
and online

Background

The Seminars for Homogenization and Quality Control in Climatological Databases have been held since 1996 in Budapest at the Hungarian Meteorological Service. Since 2004, the Interpolation Conferences have been organized jointly with the Seminars, addressing both theoretical and practical aspects. This integration reflects the strong link between these topics, as homogenization and quality control procedures rely on spatial statistics and interpolation techniques for spatial data comparison. The series of Homogenization Seminars and Interpolation Conferences has been hosted by the Hungarian Meteorological Service. The conference proceedings have been published on the WMO/WCP/WCDMP website.

Topics

High-quality homogeneous data series and spatial interpolation are indispensable for climatological and meteorological analyses. The primary goal of this meeting is to foster discussion on methodological and theoretical aspects.

The main topics of homogenization and quality control include the following:

Homogenization of climate time-series from sub-daily to monthly scale
Spatial comparison of series, inhomogeneity detection, correction of series
Methods for homogenization and quality control of daily data series, examination of parallel measurements
Relation of monthly and daily homogenization, mathematical formulation of homogenization for climate data series in general
Theoretical evaluation and benchmark for methods, validation statistics
Applications of different homogenization and quality control methods, experiences with different meteorological variables
Climate monitoring products

The main topics of spatial interpolation include the following:

Temporal scales: from synoptic situations to climatological mean values
Interpolation formulas and loss functions depending on the spatial probability distribution of climate variables
Estimation and modelling of statistical parameters (e.g.: spatial trend, covariance or variogram) for interpolation formulas using spatiotemporal sample and auxiliary model variables (topography)
Use of auxiliary co-variables, background information (e.g.: dynamical model results, satellite, radar data) for spatial interpolation (data assimilation, reanalysis)
Applications of different interpolation methods for the meteorological and climatological fields
Gridded databases, with a special focus on the homogenized, harmonized, and gridded observational database produced within the Danube-Adapt project
Gridded climate monitoring products, digital climate atlases, climate normals

The meeting will be organized as a hybrid meeting

Pre-registration and sending abstract

Pre-registration and abstract submission deadline is 10th of March 2026.
Persons intending to participate on the meeting are required pre-register by filling this form in order to register and for sending abstract.
Authors will be notified about the acceptance of their submission and about the preliminary program on 31st March 2026.

Program

Draft Abstract Book

5^th May, Tuesday
13:30-14:00	Registration
14:00-14:10	Welcome: Gábor Szanka, CEO of HungaroMet and organizers
14:10-14:30	WMO Activities in support on Climate Data ET-DDS and ET-MCCVC from the WMO Standing Committee on Climate Services Robert Dunn (UKMO)	online
14:30-14:50	Survey on homogenization practices within WMO members Jose A. Guijarro¹, Denis Stuber², Reinaldo Silveira², Peer Hechler³ ¹Associate member of the WMO Expert Team on Data Development and Stewardship ²Co-chair of the WMO Expert Team on Data Development and Stewardship ³WMO Scientific Officer	online
14:50-15:20	Theoretical Problems of Homogenization and Spatial Interpolation Tamás Szentimrey Varimax Limited Partnership, Budapest, Hungary	onsite
15:20-15:40	Coffee break
15:40-16:00	Challenges in Homogenizing Precipitation Data and Assessing Trend Representativeness Xiaolan L. Wang Climate Research Division, Environment and Climate Change Canada, Canada	onsite
16:00-16:20	Reconstruction of Maximum Temperature Time Series Using Machine Learning Models Eduarda Regina Agnolin, Fiorella Acquaotta Univesidade Federal de Santa Catarina UFSC, Brasil	online
17:00-20:00	Icebreaker on the Roof Terrace of HungaroMet

6^th May, Wednesday
08:30-09:00	Registration
09:00-09:20	Quality Control of Precipitation Data from Automatic Weather Stations using Central Integration Platform Hela Irha, Maja Piljek, Ana Šantić Croatian Meteorological and Hydrological Service (DHMZ), Ravnice 48, HR-10000 Zagreb	onsite
09:20-09:40	From Manual to Operational: Sustainable Homogenization of Monthly Temperature and Precipitation in Belgium ¹Mel Brehon, ¹Romain Ingels, ¹Laurent Delobbe, ²Rozemien De Troch, ²Thomas Muller ¹Royal Meteorological Institute of Belgium ²Belgian Climate Centre	onsite
09:40-10:00	Automated Homogenisation of monthly precipitation series for France using Climatol Gautier C., Espern-Foucaud Q., Fau F. Météo-France, Direction de la Climatologie et des Services Climatiques	online
10:00-10:20	Poster pitches 3min each
10:20-10:40	Coffee break
10:40-11:00	Rescuing the Past: Automated Homogenization of Early Instrumental Records and Its Implications for Historical Climate Reconstruction Elin Lundstad Norwegian Meteorological Institute	online
11:00-11:20	Challenges in homogenizing long series. Two examples from the Balearic Islands. Jose A. Guijarro Retired from the State Meteorological Agency (AEMET, Spain)	online
11:20-11:40	An operational homogenised daily temperature data set in Australia Blair Trewin, Simon Grainger, Alex Evans Bureau of Meteorology, Australia	online
11:40-12:00	Shifting Baselines, Shifting Trends: The Hidden Impact of Global Warming on Percentile-Based Indices Yizhak Yosef¹,²; Enric Aguilar³; Pinhas Alpert¹ ¹Department of Geophysics, Tel Aviv University, Tel Aviv, Israel ²Israel Meteorological Service, Bet Dagan, Israel ³Center for Climate Change (C3), Rovira i Virgili University, Tarragona, Spain	online
12:00-14:00	Lunch
14:00-14:20	A new blended rainfall database - extending the climatological observations series for UK rainfall using Rainfall Rescue data Stephen Packman UK Meteorological Office	onsite
14:20-14:40	Updates from the Copernicus Climate Change Service Global Land and Marine Observations Database Robert Dunn (UKMO), Simon Noone (NUIM), Matthew Menne (NOAA), Nancy Casey (CSS Inc), Peter Thorne (NUIM)	online
14:40-15:00	A new comprehensive, bias adjusted upper air dataset in the Copernicus Data Store Ulrich Voggenberger¹, Leopold Haimberger¹, Federico Ambrogi¹, Markel Garcia Diez², Paul Poli³ ¹University of Vienna, Meteorology and Geophysics, Vienna, Austria ²Predictia, Santander, Spain ³ECMWF, Bonn, Germany	onsite
15:00-15:20	GriSt: Daily 3-km Gridded Climate Fields for Central Europe since 1961 Petr Štěpánek^1,2, Pavel Zahradníček^1,2, Agnieszka Wypych³, Agnieszka Sulikowska³ ¹Global Change Research Institute of the Czech Academy of Sciences, Brno, Czech Republic ²Czech Hydrometeorological Institute, Brno Regional Office, Czech Republic ³Jagiellonian University, Institute of Geography and Spatial Management, Department of Climatology, Kraków, Poland	onsite
15:20-15:40	Coffee break
15:40-16:00	Wind direction interpolation with MISH software Kinga Bokros^1,2, Beatrix Izsák¹ ¹Department of Climate Research, HungaroMet Hungarian Meteorological Service, Budapest, Hungary ²ELTE Eötvös Loránd University, Faculty of Science, Doctoral School of Earth Sciences, Budapest, Hungary	onsite
16:00-16:20	Culture Walk with Inhomogeneities Zita Bihari and Olivér Szentes	onsite
19:00-22:00	Conference dinner at Fióka - Restaurant, Wines, Beers, 1122 Budapest, Városmajor utca 75.

7^th May, Thursday
08:30-09:00	Registration
09:00-09:10	Welcome speeches 1. Special guest from the Hungarian climate policy 2. Gabriella Szépszó (HungaroMet) 3. Attila Sütő (HungaroMet)
09:10-09:30	Homogenization with MASH - the climatological databaseof the Danube region Beatrix Izsák¹, Olivér Szentes¹, Tamás Szentimrey², Mónika Lakatos¹, Zita Bihari¹ ¹Department of Climate Research, HungaroMet Hungarian Meteorological Service, Budapest, Hungary ²Varimax Limited Partnership, Budapest, Hungary	onsite
09:30-09:50	Creation of climate database for the Danube Region: first results Olivér Szentes¹, Beatrix Izsák¹, Mónika Lakatos¹, Zita Bihari¹, Tamás Szentimrey² ¹Department of Climate Research, HungaroMet Hungarian Meteorological Service, Budapest, Hungary ²Varimax Limited Partnership, Budapest, Hungary	onsite
09:50-10:10	Bias adjustment of EURO-CORDEX high-resolution simulations by means of quantile delta mapping: Evaluation on the climate from the near past over Southeast Europe Hristo Chervenkov, Kiril Slavov National Institute of Meteorology and Hydrology, Bulgaria	onsite
10:10-10:30	Potential usability of climatological data in integrated vulnerability assessments - Development of an integrated climate vulnerability assessment framework for the Danube region Attila Sütő, Zsófia Kecskés, Pál Selmeczi, Miklós Gula HungaroMet Hungarian Meteorological Service, Budapest, Hungary	onsite
10:30-10:40	Close up of the 12^th Seminar for Homogenization and Quality Control in Climatological Databases and 7^th Interpolation Conference
10:40-11:00	Coffee break
11:00-	Beginning of the 3rd partner meeting of the Danube-Adapt project

Posters

Quality Control and Validation System for Phenological Data Ivana Medved Croatian Meteorological and Hydrological Service (DHMZ), Ravnice 48, 10000 Zagreb, Croatia
ClimRisk: Climate Projections to 2100 for Europe with a Focus on the Czech Republic Mirek Trnka^1,2, Petr Stepanek^1,3, Petr Skalák¹, Jan Balek², Pavel Zahradníček^1,3, Jan Meitner¹, Aleš Farda¹, Milan Fischer^1,2 ¹Global Change Research Institute CAS, Department of climate modelling and scenarios development, Brno, Czechia ²Mendel University in Brno, Institute of Agrosystems and Bioclimatology, Zemědělská 1, 613 00 Brno, Czech Republic ³Czech Hydrometeorological Institute, Kroftova 43, Brno, 616 00, Czech Republic
Climate Data Cooperation for Evidence-Based Adaptation in the Danube Region Mónika Lakatos, Zita Bihari, Sára Bordi, Beatrix Izsák, Otília Megyeri-Korotaj, Olivér Szentes HungaroMet, Department of Climate Research, Hungarian Meteorological Service, Budapest, Hungary
New Map Products in Climatological Services on the Webpage of the Slovak Hydrometeorological Institute Katarína Mikulová, Lívia Labudová, Juraj Holec, Dušan Štefánik, Kristína Szabóová, Gabriela Ivaňáková, Ivana Krčová, Jozef Rozkošný Slovak Hydrometeorologickal Institute, Jeseniova 17, Bratislava, Slovakia
Independent validation of daily precipitation in the Ukrainian gridded climate dataset ClimUAd Vladyslav Sidenko¹, Olesya Skrynyk^2,1, Liudmyla Palamarchuk¹, Dmytro Oshurok¹, Ihor Kravchenko1, Oleg Skrynyk¹ ¹Ukrainian Hydrometeorological Institute, Kyiv, Ukraine ²National University of Life and Environmental Sciences of Ukraine, Kyiv, Ukraine
Climate monitoring products: AgroClima and DataClima a simple and interactive way to access Drought indicators in Portugal V. Pires, C. Pereira, T. Moura, R. Deus. IPMA - Portuguese Sea and Atmosphere Institute, I.P., Portugal

Group photos

Registration fee

The registration fee (including organization, coffee breaks, modest lunches and social events) on-site is 160 EUR. The registration fee for online participation (including organization) is 40 EUR. Danube-Adapt project partners are exempt from the registration fee. Kindly be informed that registration fees are not covered by WMO. Participants are responsible for their own registration and participation costs.

The payment of the registration fee can be processed by bank transfer to:

IBAN HU13 1002 3002 0000 5703 0101 0012, SWIFT CODE: HUSTHUHB

before 20th of April or onsite.

Bank name: Magyar Államkincstár, Bank address: H-1139 Budapest, Váci út 7l., Hungary
Account Holder: HungaroMet Nonprofit Zrt., Account Holder address: H-1024 Budapest, Kitaibel Pál u. 1., Hungary

Please note that the registration fee can only be paid onsite in HUF and amounts to 64,000 HUF. Payment by card only.

Contact: seminar@met.hu

Scientific Organizing Committee

Barbara Chimani (GeoSphere)
Peer Hechler (WMO)
Beatrix Izsák (HungaroMet)
Monika Lakatos (HungaroMet)
Tamás Szentimrey (Varimax Ltd)
Ole Einar Tveito (MetNo)

Local Organizing Committee

Zita Bihari (HungaroMet)
Kinga Bokros (HungaroMet)
Beatrix Izsák (HungaroMet)
Monika Lakatos (HungaroMet)
Annamari Marton (HungaroMet)
Csilla Simon (HungaroMet)
Olivér Szentes (HungaroMet)

Logistical Information

The proceedings of previous conferences, published on the WMO/WCP/WCDMP website, are available here: