Hydroclimatic trends across 73 Greek lake catchments — derived data and computed results

Derived data and computed results underlying two companion papers on the hydroclimatic forcing of 73 Greek lake catchments — 'Asymmetric Supply-Demand Forcing across 73 Greek lake catchments since 1984' and 'Climate signal or network artefact? A relative-homogeneity and gauge-support screen for areal precipitation trends, applied to 73 Greek lake catchments' — plus the analysis code of the relative-homogeneity and gauge-support screen. No provider raw records are included: gauge-level rows carry opaque keys and station-identified inputs are permanently excluded. The archive supports method-independent replication of the verdicts reported in the companion manuscripts, not re-execution of the pipeline. See README.md for licence, attribution, analysis windows, the column dictionary and the enumerated re-identification residuals. Attribution — upstream sources, in the form each one's terms require. Reuse of this archive requires crediting the archive itself (see Citation) and, where a product below contributed, that product in the form its own terms prescribe. Wordings marked (prescribed) are the provider's own and are not paraphrased. Hydroscope / Enhydris — daily precipitation series obtained from Hydroscope, the National Databank for Hydrological and Meteorological Information (Ministry of Environment and Energy, Athens, Greece; http://www.hydroscope.gr), comprising the networks of the Ministry of Environment and Energy and of the Ministry of Rural Development and Food, accessed through the anonymous Enhydris API. Hydroscope publishes no licence, and publishes no prohibition either. No raw Hydroscope record is redistributed here, and no Hydroscope station name, coordinate or record index appears in any file, with ONE named exception: lso_dedup_gate_report.csv gives the shared record of the EL04_AMVRAKIA / EL04_OZEROS duplicate pair by gauge name, in Latin transliteration, inside one gate's free-text label. That gauge is named in clear, repeatedly, in the companion methods paper this archive accompanies — it IS that paper's Sect. 3.6 and 3.7 result — so keying it here would withhold nothing and would break the correspondence a reader is meant to check (see the fifth residual under Station identity). Every other gauge-level row carries an opaque key. That is pseudonymisation, not anonymisation: see Station identity in README.md, which states what part of the key mapping a determined reader could still reconstruct from Hydroscope's own public station inventory. Hellenic National Meteorological Service (EMY / HNMS) — sixteen long-record series are the property of the Hellenic National Meteorological Service, Ministry of National Defence, Hellenic Republic, and are reproduced here in derived form with acknowledgement of the source, in accordance with the EMY terms of use (https://www.emy.gr/terms-of-use), which permit reproduction with source attribution. ERA5-Land (prescribed) — "Generated using Copernicus Climate Change Service information [2026]" and "Contains modified Copernicus Climate Change Service information [2026]". Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains. Dataset: Muñoz-Sabater, J. et al. (2021) ERA5-Land hourly data from 1950 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS), doi 10.24381/cds.e2161bac, CC BY 4.0. GLEAM v4.3a — potential evaporation from GLEAM v4.3a, CC BY per the GLEAM4 data descriptor. Cite BOTH, as the GLEAM distribution requires: Miralles, D.G. et al. (2025) GLEAM4: global land evaporation and soil moisture dataset at 0.1° resolution from 1980 to near present. Scientific Data 12, 416, doi 10.1038/s41597-025-04610-y; and Miralles, D.G. et al. (2011) Global land-surface evaporation estimated from satellite-based observations. Hydrology and Earth System Sciences 15, 453-469. NASA POWER (prescribed) — "The data was obtained from National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division." POWER data are made available under CC BY 4.0. The open-water Penman evaporation estimates in this archive were computed by the depositors from POWER forcings. CLIMADAT-GRid (CC BY 4.0) — Varotsos, K.V. et al. (2025) CLIMADAT-GRid: a high-resolution daily gridded precipitation and temperature dataset for Greece. Zenodo, doi 10.5281/zenodo.14637536; described in Earth System Science Data 17, 4455-4477, doi 10.5194/essd-17-4455-2025. Used for the independently processed gridded cross-check. Neither the dataset nor the article is redistributed here. Water Directorate, Decentralized Administration of Crete (CC BY 4.0) — Meteorological and Hydrological Stations Open Data, https://data.apdkritis.gov.gr/dataset/meteorologikoi-kai-ydrologikoi-stathmoi. The post-2019 Cretan daily gauges. EU-DEM v1.1 (prescribed) — "Generated using European Union's Copernicus Land Monitoring Service information." The catchment boundaries implied by every catchment-keyed row in this archive were derived by the depositors from EU-DEM v1.1 (European Environment Agency, Copernicus Land Monitoring Service, 2016) and have been modified relative to the source product. EU-DEM is open access under Commission Delegated Regulation (EU) No 1159/2013. Rights reservation. The derived series and computed results in this archive are released by the depositors under CC BY 4.0. That licence covers the depositors' own contribution only; it does not and cannot extend to the underlying observations, which remain the property of the providers named above. Users intending to work with the underlying raw data must obtain it from the providers under the providers' own terms. No NOA station-level material is in this archive. No National Observatory of Athens station is named, and no per-station NOA measurement or result is reproduced, anywhere in this archive — not in the data files, and not in prose or manifests. NOA's terms prohibit reproduction of its station information without its consent, so all NOA-derived tables are withheld; see the Not deposited section of README.md. Two things that are NOT station-level do appear, and are named here so this statement is exact: the canonical-layer manifest lists the NOA workbook and the curated station-region mapping among its inputs (filenames only, no station content), and records, in two aggregate gate rows at network scale, the following and nothing else: the number of NOA stations tested (190) and their curated regional split (139 mainland / 32 island / 19 Crete); the counts of raw-significant, plain-Mann-Kendall-significant and BH-FDR-significant stations over the whole network and over its island and Crete subfamilies, split by direction; the network-scale MEDIAN Sen slope over the 190 (-44.8 mm per decade); and, for the balanced-endpoint subset, its size (32), its island-plus-Crete count (9) and its raw-drying count (0). Every one of those is an aggregate over a network: none identifies a station, none reproduces a measurement, and no station name appears beside any of them. They are nevertheless DERIVED FROM NOA measurements, so the CC BY 4.0 grant this archive makes over the depositors' own contribution does not extend to NOA's underlying station records, which remain NOA's and must be obtained from NOA under NOA's terms. NOA material used by the papers was obtained through the NOA meteosearch service (meteosearch.meteo.gr) and is credited to the National Observatory of Athens / meteo.gr; readers needing NOA records should obtain them from NOA under its own terms.