Articles | Volume 18, issue 7
https://doi.org/10.5194/essd-18-4745-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-18-4745-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
CAMELS-FI: hydrometeorological time series and landscape properties for 320 catchments in Finland
Department of geography and geology, University of Turku, Turku, 20014 Finland
Carlos Gonzales Inca
Department of geography and geology, University of Turku, Turku, 20014 Finland
Jari Uusikivi
Marine and freshwater solutions, Finnish Environment Institute, Helsinki, Finland
Petteri Alho
Department of geography and geology, University of Turku, Turku, 20014 Finland
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This study shows that climate-driven changes in spring flood patterns, especially hydrograph shape and peak sequencing, strongly affect sediment transport and river morphology in a subarctic river. Rising temperatures and more rain-on-snow events are increasing flood variability, leading to more event-driven and unpredictable sediment dynamics. Adaptive management is needed to respond to these emerging changes.
Tua Nylén, Mikel Calle, and Carlos Gonzales-Inca
EGUsphere, https://doi.org/10.5194/egusphere-2023-1399, https://doi.org/10.5194/egusphere-2023-1399, 2023
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Communities all around the Arctic urgently need information on how their coast is changing in response to climate change. We developed an automized method for mapping Arctic shoreline displacement from open satellite images. We show how coastal change hotspots, glacier retreat, spit migration and delta development can be identified from such data. Being highly efficient and accurate, our method has potential for calculating the first 40-year time series of shoreline displacement in the Arctic.
Cited articles
Aalto, J., Pirinen, P., and Jylhä, K.: New gridded daily climatology of Finland: Permutation-based uncertainty estimates and temporal trends in climate, J. Geophys. Res.-Atmos., 121, 3807–3823, https://doi.org/10.1002/2015JD024651, 2016.
Addor, N.: camels [code], https://github.com/naddor/camels (last access: 18 September 2025), 2020.
Addor, N., Newman, A. J., Mizukami, N., and Clark, M. P.: The CAMELS data set: catchment attributes and meteorology for large-sample studies, Hydrol. Earth Syst. Sci., 21, 5293–5313, https://doi.org/10.5194/hess-21-5293-2017, 2017.
Aguilar, G., Valdés, A., Cabré, A., and Galdames, F.: Flash floods controlling Cu, Pb, As and Hg variations in fluvial sediments of a river impacted by metal mining in the Atacama Desert, J. S. Am. Earth Sci., 109, 103290, https://doi.org/10.1016/j.jsames.2021.103290, 2021.
Allen, R. G., Pereira, L. S., Raes, D., and Smith, M.: Crop evapotranspiration – Guidelines for computing crop water requirements, FAO – Food and Agriculture Organization of the United Nations, Rome, Italy, ISBN 92-5-104219-5, 1998.
Allen, R. G., Pruitt, W. O., Wright, J. L., Howell, T. A., Ventura, F., Snyder, R., Itenfisu, D., Steduto, P., Berengena, J., Yrisarry, J. B., Smith, M., Pereira, L. S., Raes, D., Perrier, A., Alves, I., Walter, I., and Elliott, R.: A recommendation on standardized surface resistance for hourly calculation of reference ETo by the FAO56 Penman-Monteith method, Agr. Water Manage., 81, 1–22, https://doi.org/10.1016/j.agwat.2005.03.007, 2006.
Almagro, A., Oliveira, P. T. S., Meira Neto, A. A., Roy, T., and Troch, P.: CABra: a novel large-sample dataset for Brazilian catchments, Hydrol. Earth Syst. Sci., 25, 3105–3135, https://doi.org/10.5194/hess-25-3105-2021, 2021.
Alvarez-Garreton, C., Mendoza, P. A., Boisier, J. P., Addor, N., Galleguillos, M., Zambrano-Bigiarini, M., Lara, A., Puelma, C., Cortes, G., Garreaud, R., McPhee, J., and Ayala, A.: The CAMELS-CL dataset: catchment attributes and meteorology for large sample studies – Chile dataset, Hydrol. Earth Syst. Sci., 22, 5817–5846, https://doi.org/10.5194/hess-22-5817-2018, 2018.
Betts, A. K., Ball, J. H., and McCaughey, J. H.: Near-surface climate in the boreal forest, J. Geophys. Res.-Atmos., 106, 33529–33541, https://doi.org/10.1029/2001JD900047, 2001.
Bloomfield, J. P., Gong, M., Marchant, B. P., Coxon, G., and Addor, N.: How is Baseflow Index (BFI) impacted by water resource management practices?, Hydrol. Earth Syst. Sci., 25, 5355–5379, https://doi.org/10.5194/hess-25-5355-2021, 2021.
Bushra, S., Shakya, J., Cattoën, C., Fischer, S., and Pahlow, M.: CAMELS-NZ: hydrometeorological time series and landscape attributes for New Zealand, Earth Syst. Sci. Data, 17, 5745–5760, https://doi.org/10.5194/essd-17-5745-2025, 2025.
Casado-Rodríguez, J., Ramos-Gomes, G., and Salamon, P.: Simulación del caudal en España utilizando redes neuronales Long Short-Term Memory, Ingeniería del Agua, 30, 63–78, https://doi.org/10.4995/ia.25084, 2026.
Chagas, V. B. P., Chaffe, P. L. B., Addor, N., Fan, F. M., Fleischmann, A. S., Paiva, R. C. D., and Siqueira, V. A.: CAMELS-BR: hydrometeorological time series and landscape attributes for 897 catchments in Brazil, Earth Syst. Sci. Data, 12, 2075–2096, https://doi.org/10.5194/essd-12-2075-2020, 2020.
Chen, X., Jiang, L., Luo, Y., and Liu, J.: A global streamflow indices time series dataset for large-sample hydrological analyses on streamflow regime (until 2022), Earth Syst. Sci. Data, 15, 4463–4479, https://doi.org/10.5194/essd-15-4463-2023, 2023.
Clark, M. P., Vogel, R. M., Lamontagne, J. R., Mizukami, N., Knoben, W. J. M., Tang, G., Gharari, S., Freer, J. E., Whitfield, P. H., Shook, K. R., and Papalexiou, S. M.: The Abuse of Popular Performance Metrics in Hydrologic Modeling, Water Resour. Res., 57, e2020WR029001, https://doi.org/10.1029/2020WR029001, 2021.
Clerc-Schwarzenbach, F., Selleri, G., Neri, M., Toth, E., van Meerveld, I., and Seibert, J.: Large-sample hydrology – a few camels or a whole caravan?, Hydrol. Earth Syst. Sci., 28, 4219–4237, https://doi.org/10.5194/hess-28-4219-2024, 2024.
Corine maanpeite 2000: [data set], https://ckan.ymparisto.fi/ dataset/corine-maanpeite-2000 (last access: 1 July 2026), 2002.
Corine maanpeite 2006: [data set], https://ckan.ymparisto.fi/ dataset/corine-maanpeite-2006 (last access: 1 July 2026), 2008.
Corine maanpeite 2012: [data set], https://ckan.ymparisto.fi/ dataset/corine-maanpeite-2012 (last access: 1 July 2026), 2014.
Corine maanpeite 2018: [data set], https://ckan.ymparisto.fi/ dataset/corine-maanpeite-2018 (last access: 1 July 2026), 2020.
Coxon, G., Addor, N., Bloomfield, J. P., Freer, J., Fry, M., Hannaford, J., Howden, N. J. K., Lane, R., Lewis, M., Robinson, E. L., Wagener, T., and Woods, R.: CAMELS-GB: hydrometeorological time series and landscape attributes for 671 catchments in Great Britain, Earth Syst. Sci. Data, 12, 2459–2483, https://doi.org/10.5194/essd-12-2459-2020, 2020.
Coxon, G., Zheng, Y., Barbedo, R., Cooper, H., Fileni, F., Fowler, H. J., Fry, M., Green, A., Gribbin, T., Harfoot, H., Lewis, E., Neto, G. G. R., Qiu, X., Salwey, S., and Wendt, D. E.: CAMELS-GB v2: hydrometeorological time series and landscape attributes for 671 catchments in Great Britain, Earth Syst. Sci. Data, 18, 4345–4371, https://doi.org/10.5194/essd-18-4345-2026, 2026.
Delaigue, O., Guimarães, G. M., Brigode, P., Génot, B., Perrin, C., Soubeyroux, J.-M., Janet, B., Addor, N., and Andréassian, V.: CAMELS-FR dataset: a large-sample hydroclimatic dataset for France to explore hydrological diversity and support model benchmarking, Earth Syst. Sci. Data, 17, 1461–1479, https://doi.org/10.5194/essd-17-1461-2025, 2025.
den Bossche, J. V., Jordahl, K., Fleischmann, M., Richards, M., McBride, J., Wasserman, J., Badaracco, A. G., Snow, A. D., Ward, B., Tratner, J., Gerard, J., Perry, M., cjqf, Hjelle, G. A., Taves, M., ter Hoeven, E., Cochran, M., Bell, R., rraymondgh, Bartos, M., Roggemans, P., Culbertson, L., Caria, G., Tan, N. Y., Eubank, N., sangarshanan, Flavin, J., Rey, S., and Gardiner, S.: geopandas: v1.01 [code], https://github.com/geopandas/geopandas (last access: 1 July 2026), 2024.
do Nascimento, T. V. M., Rudlang, J., Höge, M., van der Ent, R., Chappon, M., Seibert, J., Hrachowitz, M., and Fenicia, F.: EStreams: An integrated dataset and catalogue of streamflow, hydro-climatic and landscape variables for Europe, Sci. Data, 11, 879, https://doi.org/10.1038/s41597-024-03706-1, 2024.
do Nascimento, T. V. M., Höge, M., Schönenberger, U., Pool, S., Siber, R., Kauzlaric, M., Staudinger, M., Horton, P., Floriancic, M. G., Storck, F. R., Rinta, P., Seibert, J., and Fenicia, F.: Swiss data quality: augmenting CAMELS-CH with isotopes, water quality, agricultural and atmospheric data, Sci. Data, 12, 1283, https://doi.org/10.1038/s41597-025-05625-1, 2025.
Elevation model 10 m: [data set], https://www.maanmittauslaitos.fi/en/maps-and-spatial-data/datasets-and-interfaces/product-descriptions/elevation-model-10-m (last access: 1 July 2026), 2019.
Färber, C., Plessow, H., Mischel, S. A., Kratzert, F., Addor, N., Shalev, G., and Looser, U.: GRDC-Caravan: extending Caravan with data from the Global Runoff Data Centre, Earth Syst. Sci. Data, 17, 4613–4625, https://doi.org/10.5194/essd-17-4613-2025, 2025.
Fowler, K. J. A., Acharya, S. C., Addor, N., Chou, C., and Peel, M. C.: CAMELS-AUS: hydrometeorological time series and landscape attributes for 222 catchments in Australia, Earth Syst. Sci. Data, 13, 3847–3867, https://doi.org/10.5194/essd-13-3847-2021, 2021a.
Fowler, K. J. A., Coxon, G., Freer, J. E., Knoben, W. J. M., Peel, M. C., Wagener, T., Western, A. W., Woods, R. A., and Zhang, L.: Towards more realistic runoff projections by removing limits on simulated soil moisture deficit, J. Hydrol., 600, 126505, https://doi.org/10.1016/j.jhydrol.2021.126505, 2021b.
Fowler, K. J. A., Zhang, Z., and Hou, X.: CAMELS-AUS v2: updated hydrometeorological time series and landscape attributes for an enlarged set of catchments in Australia, Earth Syst. Sci. Data, 17, 4079–4095, https://doi.org/10.5194/essd-17-4079-2025, 2025.
Gauch, M., Mai, J., and Lin, J.: The proper care and feeding of CAMELS: How limited training data affects streamflow prediction, Environ. Modell. Softw., 135, 104926, https://doi.org/10.1016/j.envsoft.2020.104926, 2021.
Geological Survey of Finland: Bedrock of Finland 1:1 000 000, Hakku [data set], https://tupa.gtk.fi/paikkatieto/meta/bedrock_of_finland_1m.html (last access: 1 October 2025), 2016.
Gillies, S. et al.: Rasterio: geospatial raster I/O for Python programmers, v 1.4.3. [code], https://github.com/rasterio/rasterio (last access: 1 July 2026), 2024.
Gupta, H. V., Perrin, C., Blöschl, G., Montanari, A., Kumar, R., Clark, M., and Andréassian, V.: Large-sample hydrology: a need to balance depth with breadth, Hydrol. Earth Syst. Sci., 18, 463–477, https://doi.org/10.5194/hess-18-463-2014, 2014.
Han, S., Slater, L., Wilby, R. L., and Faulkner, D.: Contribution of urbanisation to non-stationary river flow in the UK, J. Hydrol., 613, 128417, https://doi.org/10.1016/j.jhydrol.2022.128417, 2022.
Hao, Z., Jin, J., Xia, R., Tian, S., Yang, W., Liu, Q., Zhu, M., Ma, T., Jing, C., and Zhang, Y.: CCAM: China Catchment Attributes and Meteorology dataset, Earth Syst. Sci. Data, 13, 5591–5616, https://doi.org/10.5194/essd-13-5591-2021, 2021.
Hasan, F., Medley, P., Drake, J., and Chen, G.: Advancing Hydrology through Machine Learning: Insights, Challenges, and Future Directions Using the CAMELS, Caravan, GRDC, CHIRPS, PERSIANN, NLDAS, GLDAS, and GRACE Datasets, Water-Sui, 16, 1904, https://doi.org/10.3390/w16131904, 2024.
Helgason, H. B. and Nijssen, B.: LamaH-Ice: LArge-SaMple DAta for Hydrology and Environmental Sciences for Iceland, Earth Syst. Sci. Data, 16, 2741–2771, https://doi.org/10.5194/essd-16-2741-2024, 2024.
Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horányi, A., Muñoz-Sabater, J., Nicolas, J., Peubey, C., Radu, R., Schepers, D., Simmons, A., Soci, C., Abdalla, S., Abellan, X., Balsamo, G., Bechtold, P., Biavati, G., Bidlot, J., Bonavita, M., De Chiara, G., Dahlgren, P., Dee, D., Diamantakis, M., Dragani, R., Flemming, J., Forbes, R., Fuentes, M., Geer, A., Haimberger, L., Healy, S., Hogan, R. J., Hólm, E., Janisková, M., Keeley, S., Laloyaux, P., Lopez, P., Lupu, C., Radnoti, G., de Rosnay, P., Rozum, I., Vamborg, F., Villaume, S., and Thépaut, J.-N.: The ERA5 global reanalysis, Q. J. Roy. Meteor. Soc., 146, 1999–2049, https://doi.org/10.1002/qj.3803, 2020.
Höge, M., Kauzlaric, M., Siber, R., Schönenberger, U., Horton, P., Schwanbeck, J., Floriancic, M. G., Viviroli, D., Wilhelm, S., Sikorska-Senoner, A. E., Addor, N., Brunner, M., Pool, S., Zappa, M., and Fenicia, F.: CAMELS-CH: hydro-meteorological time series and landscape attributes for 331 catchments in hydrologic Switzerland, Earth Syst. Sci. Data, 15, 5755–5784, https://doi.org/10.5194/essd-15-5755-2023, 2023.
Hydrologiarajapinta: https://rajapinnat.ymparisto.fi/api/Hydrologiarajapinta/1.0, last access: 13 May 2026.
Irannezhad, M., Abdulghafour, Z., and Sadeqi, A.: Climate Teleconnections Influencing Historical Variations, Trends, and Shifts in Snow Cover Days in Finland, Earth Syst. Environ., 8, 1601–1613, https://doi.org/10.1007/s41748-024-00466-1, 2024.
Järvirajapinta: https://rajapinnat.ymparisto.fi/api/jarvirajapinta/1.0, last access: 23 June 2025.
Jimenez, D. A., Meneses, J. E., Solha, P. H. B., Avila-Diaz, A., Quesada, B., Melo Brentan, B., and Ferreira Rodrigues, A.: CAMELS-COL: A Large-Sample Hydrometeorological Dataset for Colombia, Earth Syst. Sci. Data Discuss. [preprint], https://doi.org/10.5194/essd-2025-200, in review, 2025.
Karro, E. and Lahermo, P.: Occurence and chemical characteristics of groundwater, Geol. S. Finl., 27, 85–96, 1999.
Katko, T. S., Lipponen, M. A., and Rönkä, E. K. T.: Groundwater use and policy in community water supply in Finland, Hydrogeol. J., 14, 69–78, https://doi.org/10.1007/s10040-004-0351-3, 2006.
Klingler, C., Schulz, K., and Herrnegger, M.: LamaH-CE: LArge-SaMple DAta for Hydrology and Environmental Sciences for Central Europe, Earth Syst. Sci. Data, 13, 4529–4565, https://doi.org/10.5194/essd-13-4529-2021, 2021.
Klotz, D., Gauch, M., Kratzert, F., Nearing, G., and Zscheischler, J.: Technical Note: The divide and measure nonconformity – how metrics can mislead when we evaluate on different data partitions, Hydrol. Earth Syst. Sci., 28, 3665–3673, https://doi.org/10.5194/hess-28-3665-2024, 2024.
Knoben, W. J. M. and Spieler, D.: Teaching hydrological modelling: illustrating model structure uncertainty with a ready-to-use computational exercise, Hydrol. Earth Syst. Sci., 26, 3299–3314, https://doi.org/10.5194/hess-26-3299-2022, 2022.
Knoben, W. J. M., Thébault, C., Keshavarz, K., Torres-Rojas, L., Chaney, N. W., Pietroniro, A., and Clark, M. P.: Catchment Attributes and MEteorology for Large-Sample SPATially distributed analysis (CAMELS-SPAT): streamflow observations, forcing data and geospatial data for hydrologic studies across North America, Hydrol. Earth Syst. Sci., 29, 5791–5833, https://doi.org/10.5194/hess-29-5791-2025, 2025.
Korhonen, J.: Suomen vesistöjen virtaaman ja vedenkorkeuden vaihtelut, SYKE, Helsinki, 120 pp., ISBN 978-952-11-2935-3, 2007.
Korhonen, J. and Kuusisto, E.: Long-term changes in the discharge regime in Finland, Hydrol. Res., 41, 253–268, https://doi.org/10.2166/nh.2010.112, 2010.
Kraft, B., Schirmer, M., Aeberhard, W. H., Zappa, M., Seneviratne, S. I., and Gudmundsson, L.: CH-RUN: a deep-learning-based spatially contiguous runoff reconstruction for Switzerland, Hydrol. Earth Syst. Sci., 29, 1061–1082, https://doi.org/10.5194/hess-29-1061-2025, 2025.
Kratzert, F., Klotz, D., Brenner, C., Schulz, K., and Herrnegger, M.: Rainfall–runoff modelling using Long Short-Term Memory (LSTM) networks, Hydrol. Earth Syst. Sci., 22, 6005–6022, https://doi.org/10.5194/hess-22-6005-2018, 2018.
Kratzert, F., Klotz, D., Herrnegger, M., Sampson, A. K., Hochreiter, S., and Nearing, G. S.: Toward Improved Predictions in Ungauged Basins: Exploiting the Power of Machine Learning, Water Resour. Res., 55, 11344–11354, https://doi.org/10.1029/2019WR026065, 2019a.
Kratzert, F., Klotz, D., Shalev, G., Klambauer, G., Hochreiter, S., and Nearing, G.: Towards learning universal, regional, and local hydrological behaviors via machine learning applied to large-sample datasets, Hydrol. Earth Syst. Sci., 23, 5089–5110, https://doi.org/10.5194/hess-23-5089-2019, 2019b.
Kratzert, F., Nearing, G., Addor, N., Erickson, T., Gauch, M., Gilon, O., Gudmundsson, L., Hassidim, A., Klotz, D., Nevo, S., Shalev, G., and Matias, Y.: Caravan – A global community dataset for large-sample hydrology, Sci. Data, 10, 61, https://doi.org/10.1038/s41597-023-01975-w, 2023.
Kratzert, F., Gauch, M., Klotz, D., and Nearing, G.: HESS Opinions: Never train a Long Short-Term Memory (LSTM) network on a single basin, Hydrol. Earth Syst. Sci., 28, 4187–4201, https://doi.org/10.5194/hess-28-4187-2024, 2024.
Krejčí, J. and Nearing, G.: [CAMELS-CZ] Catchment Attributes and Meteorology for Large-Sample Studies – Czechia, https://doi.org/10.5281/zenodo.17769325, 2025.
Kuusisto, E.: Suomen vesistöjen bifurkaatiot [The bifurcations of Finnish watercourses], Terra, 96, 253–261, 1984.
Ladson, A. R., Brown, R., Neal, B., and Nathan, R.: A Standard Approach to Baseflow Separation Using The Lyne and Hollick Filter, Australasian Journal of Water Resources, 17, 25–34, https://doi.org/10.7158/13241583.2013.11465417, 2013.
Lindsay, J. B.: The Whitebox Geospatial Analysis Tools project and open-access GIS, in: Proceedings of the GIS Research UK, 22nd Annual Conference, The University of Glasgow, https://www.gla.ac.uk/media/Media_401757_smxx.pdf (last access: 1 July 2026), 2014.
Liu, J., Koch, J., Stisen, S., Troldborg, L., Højberg, A. L., Thodsen, H., Hansen, M. F. T., and Schneider, R. J. M.: CAMELS-DK: hydrometeorological time series and landscape attributes for 3330 Danish catchments with streamflow observations from 304 gauged stations, Earth Syst. Sci. Data, 17, 1551–1572, https://doi.org/10.5194/essd-17-1551-2025, 2025.
Loritz, R., Dolich, A., Acuña Espinoza, E., Ebeling, P., Guse, B., Götte, J., Hassler, S. K., Hauffe, C., Heidbüchel, I., Kiesel, J., Mälicke, M., Müller-Thomy, H., Stölzle, M., and Tarasova, L.: CAMELS-DE: hydro-meteorological time series and attributes for 1582 catchments in Germany, Earth Syst. Sci. Data, 16, 5625–5642, https://doi.org/10.5194/essd-16-5625-2024, 2024.
Lun, D., Fischer, S., Viglione, A., and Blöschl, G.: Detecting Flood-Rich and Flood-Poor Periods in Annual Peak Discharges Across Europe, Water Resour. Res., 56, e2019WR026575, https://doi.org/10.1029/2019WR026575, 2020.
Luojus, K., Venäläinen, P., Moisander, M., Pulliainen, J., Takala, M., Lemmetyinen, J., Derksen, C., Mortimer, C., Mudryk, L., Scwaizer, G., and Nagler, T.: ESA Snow Climate Change Initiative (Snow_cci): Snow Water Equivalent (SWE) level 3C daily global climate research data package (CRDP) (1979–2022), version 3.1. [data set], https://doi.org/10.5285/9d9bfc488ec54b1297eca2c9662f9c81, 2024.
Mangukiya, N. K., Kumar, K. B., Dey, P., Sharma, S., Bejagam, V., Mujumdar, P. P., and Sharma, A.: CAMELS-IND: hydrometeorological time series and catchment attributes for 228 catchments in Peninsular India, Earth Syst. Sci. Data, 17, 461–491, https://doi.org/10.5194/essd-17-461-2025, 2025.
McMillan, H., Coxon, G., Araki, R., Salwey, S., Kelleher, C., Zheng, Y., Knoben, W., Gnann, S., Seibert, J., and Bolotin, L.: When good signatures go bad: Applying hydrologic signatures in large sample studies, Hydrol. Process., 37, e14987, https://doi.org/10.1002/hyp.14987, 2023.
McMillan, H. K., Gnann, S. J., and Araki, R.: Large Scale Evaluation of Relationships Between Hydrologic Signatures and Processes, Water Resour. Res., 58, e2021WR031751, https://doi.org/10.1029/2021WR031751, 2022.
Mudryk, L., Mortimer, C., Derksen, C., Elias Chereque, A., and Kushner, P.: Benchmarking of snow water equivalent (SWE) products based on outcomes of the SnowPEx+ Intercomparison Project, The Cryosphere, 19, 201–218, https://doi.org/10.5194/tc-19-201-2025, 2025.
Muñoz-Sabater, J., Dutra, E., Agustí-Panareda, A., Albergel, C., Arduini, G., Balsamo, G., Boussetta, S., Choulga, M., Harrigan, S., Hersbach, H., Martens, B., Miralles, D. G., Piles, M., Rodríguez-Fernández, N. J., Zsoter, E., Buontempo, C., and Thépaut, J.-N.: ERA5-Land: a state-of-the-art global reanalysis dataset for land applications, Earth Syst. Sci. Data, 13, 4349–4383, https://doi.org/10.5194/essd-13-4349-2021, 2021.
National Land Survey of Finland: Topographic database, National Land Survey of Finland [data set], https://www.maanmittauslaitos.fi/en/maps-and-spatial-data/datasets-and-interfaces/product-descriptions/topographic-database (last access: 1 July 2026), 2024.
Newman, A. J., Clark, M. P., Sampson, K., Wood, A., Hay, L. E., Bock, A., Viger, R. J., Blodgett, D., Brekke, L., Arnold, J. R., Hopson, T., and Duan, Q.: Development of a large-sample watershed-scale hydrometeorological data set for the contiguous USA: data set characteristics and assessment of regional variability in hydrologic model performance, Hydrol. Earth Syst. Sci., 19, 209–223, https://doi.org/10.5194/hess-19-209-2015, 2015.
Nijzink, J., Loritz, R., Gourdol, L., Zoccatelli, D., Iffly, J. F., and Pfister, L.: CAMELS-LUX: Highly Resolved Hydro-Meteorological and Atmospheric Data for Physiographically Characterized Catchments around Luxembourg, Earth Syst. Sci. Data Discuss. [preprint], https://doi.org/10.5194/essd-2024-482, in review, 2025.
O'Connell, E., O'Donnell, G., and Koutsoyiannis, D.: On the Spatial Scale Dependence of Long-Term Persistence in Global Annual Precipitation Data and the Hurst Phenomenon, Water Resour. Res., 59, e2022WR033133, https://doi.org/10.1029/2022WR033133, 2023.
Peltoniemi, M., Pulkkinen, M., Aurela, M., Pumpanen, J., Kolari, P., and Mäkelä, A.: A semi-empirical model of boreal-forest gross primary production, evapotranspiration, and soil water – calibration and sensitivity analysis, Boreal Env. Res., 20, 151–171, 2015.
Pirinen, P., Lehtonen, I., Heikkinen, R. K., Aapala, K., and Aalto, J.: Daily gridded evapotranspiration data for Finland for 1981–2020, FMI's Clim. Bull. Res. Lett., 4, 35–37, https://doi.org/10.35614/ISSN-2341-6408-IK-2022-11-RL, 2022.
Statistics Finland: Population grid data: 1 km×1 km, 2023, https://www.paikkatietohakemisto.fi/geonetwork/srv/eng/catalog.search#/metadata/a901d40a-8a6b-4678-814c-79d2e2ab130c (last access: 1 July 2026), 2024.
Robins, P. E., Dickson, N., Kevill, J. L., Malham, S. K., Singer, A. C., Quilliam, R. S., and Jones, D. L.: Predicting the dispersal of SARS-CoV-2 RNA from the wastewater treatment plant to the coast, Heliyon, 8, https://doi.org/10.1016/j.heliyon.2022.e10547, 2022.
Saltikoff, E., Lopez, P., Taskinen, A., and Pulkkinen, S.: Comparison of quantitative snowfall estimates from weather radar, rain gauges and a numerical weather prediction model, Boreal Environ. Res., 20, 667–678, 2015.
Sankarasubramanian, A., Vogel, R. M., and Limbrunner, J. F.: Climate elasticity of streamflow in the United States, Water Resour. Res., 37, 1771–1781, https://doi.org/10.1029/2000WR900330, 2001.
Senent-Aparicio, J., Castellanos-Osorio, G., Segura-Méndez, F., López-Ballesteros, A., Jimeno-Sáez, P., and Pérez-Sánchez, J.: BULL Database – Spanish Basin attributes for Unravelling Learning in Large-sample hydrology, Sci. Data, 11, 737, https://doi.org/10.1038/s41597-024-03594-5, 2024.
Seppä, I. and Sainio, L.: iiroseppa/CAMELS-FI: Publication version, Zenodo [code], https://doi.org/10.5281/zenodo.21101162, 2026.
Seppä, I., Gonzales Inca, C. A., Uusikivi, J., and Alho, P.: CAMELS-FI (1.0.0), Zenodo [data set], https://doi.org/10.5281/zenodo.15853357, 2025.
Singer, M. B., Asfaw, D. T., Rosolem, R., Cuthbert, M. O., Miralles, D. G., MacLeod, D., Quichimbo, E. A., and Michaelides, K.: Hourly potential evapotranspiration at 0.1° resolution for the global land surface from 1981–present, Sci. Data, 8, 224, https://doi.org/10.1038/s41597-021-01003-9, 2021.
Sterle, G., Perdrial, J., Kincaid, D. W., Underwood, K. L., Rizzo, D. M., Haq, I. U., Li, L., Lee, B. S., Adler, T., Wen, H., Middleton, H., and Harpold, A. A.: CAMELS-Chem: augmenting CAMELS (Catchment Attributes and Meteorology for Large-sample Studies) with atmospheric and stream water chemistry data, Hydrol. Earth Syst. Sci., 28, 611–630, https://doi.org/10.5194/hess-28-611-2024, 2024.
Superficial deposit thickness 1:1 000 000: [data set], https://tupa.gtk.fi/paikkatieto/meta/maapeitepaksuus_1000k.html (last access: 1 July 2026), 2018.
Superficial deposits of Finland 1:200 000: [data set], https://tupa.gtk.fi/paikkatieto/meta/maapera_200k.html (last access: 1 July 2026), 2018.
Takala, M., Luojus, K., Pulliainen, J., Derksen, C., Lemmetyinen, J., Kärnä, J.-P., Koskinen, J., and Bojkov, B.: Estimating northern hemisphere snow water equivalent for climate research through assimilation of space-borne radiometer data and ground-based measurements, Remote Sens. Environ., 115, 3517–3529, https://doi.org/10.1016/j.rse.2011.08.014, 2011.
Teutschbein, C.: CAMELS-SE: Long-term hydroclimatic observations (1961–2020) across 50 catchments in Sweden as a resource for modelling, education, and collaboration, Geosci. Data J., 11, 655–668, https://doi.org/10.1002/gdj3.239, 2024.
Tikkanen, M.: Long-term changes in lake and river systems in Finland, Fennia, 180, 31–42, 2002.
Tran, V. N., Xu, D., Van Nguyen, T., Kim, T., and Ivanov, V. Y.: CAMELSH: A Large-Sample Hourly Hydrometeorological Dataset and Attributes at Watershed-Scale for CONUS, Sci. Data, 12, 1307, https://doi.org/10.1038/s41597-025-05612-6, 2025.
Turner, S., Hannaford, J., Barker, L. J., Suman, G., Killeen, A., Armitage, R., Chan, W., Davies, H., Griffin, A., Kumar, A., Dixon, H., Albuquerque, M. T. D., Almeida Ribeiro, N., Alvarez-Garreton, C., Amoussou, E., Arheimer, B., Asano, Y., Berezowski, T., Bodian, A., Boutaghane, H., Capell, R., Dakhaoui, H., Daňhelka, J., Do, H. X., Ekkawatpanit, C., El Khalki, E. M., Fleig, A. K., Fonseca, R., Giraldo-Osorio, J. D., Goula, A. B. T., Hanel, M., Horton, S., Kan, C., Kingston, D. G., Laaha, G., Laugesen, R., Lopes, W., Mager, S., Rachdane, M., Markonis, Y., Medeiro, L., Midgley, G., Murphy, C., O'Connor, P., Pedersen, A. I., Pham, H. T., Piniewski, M., Renard, B., Saidi, M. E., Schmocker-Fackel, P., Stahl, K., Thyer, M., Toucher, M., Tramblay, Y., Uusikivi, J., Venegas-Cordero, N., Visessri, S., Watson, A., Westra, S., and Whitfield, P. H.: ROBIN: Reference observatory of basins for international hydrological climate change detection, Sci. Data, 12, 654, https://doi.org/10.1038/s41597-025-04907-y, 2025.
Uomaverkosto: [data set], https://ckan.ymparisto.fi/dataset/uomaverkosto (last access: 19 March 2024), 2024.
Valseth, K., Valnes, L., Lappegard, G., Silantyeva, O., and Mardal, K.-A.: Development of CAMELS-Nordic, a large-scale hydrometeorological and catchment properties dataset for Norway and Sweden, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-10411, https://doi.org/10.5194/egusphere-egu25-10411, 2025.
Valuma-aluejako: [data set] https://ckan.ymparisto.fi/dataset/valuma-aluejako (last access: 15 May 2023), 2023.
Welch, B. L.: The generalization of “student's” problem when several different population variances are involved, Biometrika, 34, 28–35, https://doi.org/10.1093/biomet/34.1-2.28, 1947.
Wilkinson, M. D., Dumontier, M., Aalbersberg, Ij. J., Appleton, G., Axton, M., Baak, A., Blomberg, N., Boiten, J.-W., da Silva Santos, L. B., Bourne, P. E., Bouwman, J., Brookes, A. J., Clark, T., Crosas, M., Dillo, I., Dumon, O., Edmunds, S., Evelo, C. T., Finkers, R., Gonzalez-Beltran, A., Gray, A. J. G., Groth, P., Goble, C., Grethe, J. S., Heringa, J., 't Hoen, P. A. C., Hooft, R., Kuhn, T., Kok, R., Kok, J., Lusher, S. J., Martone, M. E., Mons, A., Packer, A. L., Persson, B., Rocca-Serra, P., Roos, M., van Schaik, R., Sansone, S.-A., Schultes, E., Sengstag, T., Slater, T., Strawn, G., Swertz, M. A., Thompson, M., van der Lei, J., van Mulligen, E., Velterop, J., Waagmeester, A., Wittenburg, P., Wolstencroft, K., Zhao, J., and Mons, B.: The FAIR Guiding Principles for scientific data management and stewardship, Sci. Data, 3, 160018, https://doi.org/10.1038/sdata.2016.18, 2016.
Woods, R. A.: Analytical model of seasonal climate impacts on snow hydrology: Continuous snowpacks, Adv. Water Resour., 32, 1465–1481, https://doi.org/10.1016/j.advwatres.2009.06.011, 2009.
Yadav, M., Wagener, T., and Gupta, H.: Regionalization of constraints on expected watershed response behavior for improved predictions in ungauged basins, Adv. Water Resour., 30, 1756–1774, https://doi.org/10.1016/j.advwatres.2007.01.005, 2007.
Short summary
This study introduces CAMELS-FI (Catchment Attributes and MEteorology for Large-sample Studies-Finland), an extensive, consistent, high quality and easily usable hydro-meteorological dataset for 320 catchments in Finland. For each catchment, it includes daily streamflow data of up to 63 years (1961–2023) at the pour point of the catchment, daily catchment averaged meteorology for 14 variables for the full 63 years and 85 “static” attributes describing metadata of the stream gauges and the catchments, biogeophysical and societal attributes.
This study introduces CAMELS-FI (Catchment Attributes and MEteorology for Large-sample...
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