{
 "slug": "friedrich-meadows-greifswald",
 "object": {
  "artist": "Caspar David Friedrich",
  "title": "Meadows near Greifswald",
  "holder": "Hamburger Kunsthalle",
  "accession": "1047",
  "catalogue_date": "1821/22",
  "drawing_date": "c. 1806 (probable, not an established inscription)",
  "painted_day": null,
  "painted_day_reason": "studio_picture_no_documented_weather_day"
 },
 "window": {
  "start": "1806-05-01",
  "end": "1806-07-31",
  "days": 92,
  "scope": "Regional context for the 1806 journey, not a dated meadow drawing or painted weather window",
  "basis": "Whole May, June and July between the museum chronology’s departure on 24 April and return in August; no continuous Greifswald stay inferred."
 },
 "station": {
  "name": "Berlin inner city",
  "id": "PANGAEA.869767 / Berlin_inner_City",
  "lat": 52.506,
  "lon": 13.39744,
  "km_to_greifswald": 177,
  "location_note": "Dataset reference coordinate for a changing inner-city station series; distance to the OSM city point, not the meadow viewpoint.",
  "start": "1766-01-01",
  "end": "1934-12-31",
  "method": "Published daily means, digitized and error-corrected by Kadow et al. (2016) from Das Klima von Berlin (1971); no additional bias correction in that release."
 },
 "place": {
  "name": "Greifswald (city reference point)",
  "lat": 54.095791,
  "lon": 13.3815238
 },
 "series": [
  {
   "date": "1806-05-01",
   "mean_c": 6.7
  },
  {
   "date": "1806-05-02",
   "mean_c": 10.9
  },
  {
   "date": "1806-05-03",
   "mean_c": 13.9
  },
  {
   "date": "1806-05-04",
   "mean_c": 13.2
  },
  {
   "date": "1806-05-05",
   "mean_c": 10.9
  },
  {
   "date": "1806-05-06",
   "mean_c": 12.4
  },
  {
   "date": "1806-05-07",
   "mean_c": 14.6
  },
  {
   "date": "1806-05-08",
   "mean_c": 15.7
  },
  {
   "date": "1806-05-09",
   "mean_c": 15.0
  },
  {
   "date": "1806-05-10",
   "mean_c": 17.0
  },
  {
   "date": "1806-05-11",
   "mean_c": 17.8
  },
  {
   "date": "1806-05-12",
   "mean_c": 18.2
  },
  {
   "date": "1806-05-13",
   "mean_c": 11.1
  },
  {
   "date": "1806-05-14",
   "mean_c": 16.7
  },
  {
   "date": "1806-05-15",
   "mean_c": 20.0
  },
  {
   "date": "1806-05-16",
   "mean_c": 19.3
  },
  {
   "date": "1806-05-17",
   "mean_c": 15.4
  },
  {
   "date": "1806-05-18",
   "mean_c": 12.6
  },
  {
   "date": "1806-05-19",
   "mean_c": 13.7
  },
  {
   "date": "1806-05-20",
   "mean_c": 13.9
  },
  {
   "date": "1806-05-21",
   "mean_c": 16.8
  },
  {
   "date": "1806-05-22",
   "mean_c": 20.0
  },
  {
   "date": "1806-05-23",
   "mean_c": 18.7
  },
  {
   "date": "1806-05-24",
   "mean_c": 16.8
  },
  {
   "date": "1806-05-25",
   "mean_c": 13.2
  },
  {
   "date": "1806-05-26",
   "mean_c": 17.4
  },
  {
   "date": "1806-05-27",
   "mean_c": 12.4
  },
  {
   "date": "1806-05-28",
   "mean_c": 16.5
  },
  {
   "date": "1806-05-29",
   "mean_c": 20.0
  },
  {
   "date": "1806-05-30",
   "mean_c": 18.0
  },
  {
   "date": "1806-05-31",
   "mean_c": 13.7
  },
  {
   "date": "1806-06-01",
   "mean_c": 11.8
  },
  {
   "date": "1806-06-02",
   "mean_c": 9.3
  },
  {
   "date": "1806-06-03",
   "mean_c": 11.5
  },
  {
   "date": "1806-06-04",
   "mean_c": 13.9
  },
  {
   "date": "1806-06-05",
   "mean_c": 15.2
  },
  {
   "date": "1806-06-06",
   "mean_c": 16.7
  },
  {
   "date": "1806-06-07",
   "mean_c": 18.0
  },
  {
   "date": "1806-06-08",
   "mean_c": 18.2
  },
  {
   "date": "1806-06-09",
   "mean_c": 19.4
  },
  {
   "date": "1806-06-10",
   "mean_c": 22.0
  },
  {
   "date": "1806-06-11",
   "mean_c": 24.8
  },
  {
   "date": "1806-06-12",
   "mean_c": 15.7
  },
  {
   "date": "1806-06-13",
   "mean_c": 12.4
  },
  {
   "date": "1806-06-14",
   "mean_c": 15.7
  },
  {
   "date": "1806-06-15",
   "mean_c": 18.7
  },
  {
   "date": "1806-06-16",
   "mean_c": 18.5
  },
  {
   "date": "1806-06-17",
   "mean_c": 13.5
  },
  {
   "date": "1806-06-18",
   "mean_c": 12.2
  },
  {
   "date": "1806-06-19",
   "mean_c": 15.7
  },
  {
   "date": "1806-06-20",
   "mean_c": 13.3
  },
  {
   "date": "1806-06-21",
   "mean_c": 8.9
  },
  {
   "date": "1806-06-22",
   "mean_c": 10.7
  },
  {
   "date": "1806-06-23",
   "mean_c": 7.8
  },
  {
   "date": "1806-06-24",
   "mean_c": 9.1
  },
  {
   "date": "1806-06-25",
   "mean_c": 10.0
  },
  {
   "date": "1806-06-26",
   "mean_c": 11.8
  },
  {
   "date": "1806-06-27",
   "mean_c": 15.0
  },
  {
   "date": "1806-06-28",
   "mean_c": 12.2
  },
  {
   "date": "1806-06-29",
   "mean_c": 13.0
  },
  {
   "date": "1806-06-30",
   "mean_c": 15.0
  },
  {
   "date": "1806-07-01",
   "mean_c": 13.0
  },
  {
   "date": "1806-07-02",
   "mean_c": 11.8
  },
  {
   "date": "1806-07-03",
   "mean_c": 10.4
  },
  {
   "date": "1806-07-04",
   "mean_c": 13.0
  },
  {
   "date": "1806-07-05",
   "mean_c": 14.1
  },
  {
   "date": "1806-07-06",
   "mean_c": 14.3
  },
  {
   "date": "1806-07-07",
   "mean_c": 15.6
  },
  {
   "date": "1806-07-08",
   "mean_c": 16.1
  },
  {
   "date": "1806-07-09",
   "mean_c": 18.7
  },
  {
   "date": "1806-07-10",
   "mean_c": 18.3
  },
  {
   "date": "1806-07-11",
   "mean_c": 20.6
  },
  {
   "date": "1806-07-12",
   "mean_c": 19.1
  },
  {
   "date": "1806-07-13",
   "mean_c": 18.3
  },
  {
   "date": "1806-07-14",
   "mean_c": 19.8
  },
  {
   "date": "1806-07-15",
   "mean_c": 17.4
  },
  {
   "date": "1806-07-16",
   "mean_c": 16.8
  },
  {
   "date": "1806-07-17",
   "mean_c": 17.8
  },
  {
   "date": "1806-07-18",
   "mean_c": 20.0
  },
  {
   "date": "1806-07-19",
   "mean_c": 17.6
  },
  {
   "date": "1806-07-20",
   "mean_c": 14.3
  },
  {
   "date": "1806-07-21",
   "mean_c": 15.2
  },
  {
   "date": "1806-07-22",
   "mean_c": 18.0
  },
  {
   "date": "1806-07-23",
   "mean_c": 18.0
  },
  {
   "date": "1806-07-24",
   "mean_c": 19.8
  },
  {
   "date": "1806-07-25",
   "mean_c": 19.1
  },
  {
   "date": "1806-07-26",
   "mean_c": 20.0
  },
  {
   "date": "1806-07-27",
   "mean_c": 20.0
  },
  {
   "date": "1806-07-28",
   "mean_c": 19.1
  },
  {
   "date": "1806-07-29",
   "mean_c": 15.4
  },
  {
   "date": "1806-07-30",
   "mean_c": 18.2
  },
  {
   "date": "1806-07-31",
   "mean_c": 18.3
  }
 ],
 "months": [
  {
   "month": 5,
   "days": 31,
   "mean_c": 15.2
  },
  {
   "month": 6,
   "days": 30,
   "mean_c": 14.3
  },
  {
   "month": 7,
   "days": 31,
   "mean_c": 17.0
  }
 ],
 "aggregation": "Arithmetic mean of the published daily mean temperatures within each complete calendar month, at Berlin alone; rounded to 0.1 °C.",
 "data_license": "Berlin series, derived monthly means and chart: CC BY-SA 3.0, Kadow et al. (2016), https://doi.org/10.1594/PANGAEA.869767",
 "quotes": {
  "drawing_date": {
   "text": "vermutlich bereits um 1806",
   "source": "grave",
   "english": "probably already around 1806"
  },
  "studio": {
   "text": "In seinem Dresdener Atelier",
   "source": "drawing",
   "english": "In his Dresden studio"
  },
  "departure": {
   "text": "left Dresden on April 24",
   "source": "chronology"
  },
  "greifswald": {
   "text": "Friedrich is in Greifswald on June 13",
   "source": "chronology"
  },
  "return": {
   "text": "Friedrich returns to Dresden in August",
   "source": "chronology"
  },
  "sky": {
   "text": "the muted blue colour of the cloudless sky",
   "source": "heck"
  }
 },
 "excluded": {
  "greifswald_dwd": {
   "station": "01757",
   "first_date": "1898-03-01",
   "lat": 54.0967,
   "lon": 13.4056,
   "value": null,
   "reason": "inventory_starts_after_target"
  },
  "lund": {
   "station": "53430",
   "missing_months": [
    "1806-05",
    "1806-06",
    "1806-07"
   ],
   "value": null,
   "reason": "target_months_absent_from_downloaded_monthly_archive"
  },
  "stettin": {
   "value": null,
   "reason": "usable_target_period_series_not_located_in_bounded_search"
  },
  "copenhagen": {
   "value": null,
   "reason": "early_monthly_series_documented_but_values_not_retrieved; not_needed_for_selected_single_series_context"
  }
 },
 "unresolved": {
  "local_cloud": null,
  "local_cloud_reason": "no_verified_local_record_matched_to_drawing",
  "local_rain": null,
  "local_rain_reason": "no_verified_local_record_matched_to_drawing",
  "drawing_day": null,
  "drawing_day_reason": "approximate_year_only",
  "contemporary_weather_witness": null,
  "witness_reason": "none_verified_for_this_drawing",
  "modern_anomaly": null,
  "modern_anomaly_reason": "published_series_ends_1934; no_station_splice",
  "weather_rank": null,
  "rank_reason": "descriptive_context_only; changing_sites_and_historical_bias_not_homogenized_here"
 },
 "receipts": {
  "museum": {
   "title": "Hamburger Kunsthalle, Caspar David Friedrich exhibition: Wiesen bei Greifswald",
   "url": "https://www.hamburger-kunsthalle.de/de/ausstellungen/caspar-david-friedrich",
   "sha256": "ec887fbbe08be4f09b390b7fcc446f40861ec05e5569e40acf004bae925cafdf",
   "retrieved_at": "2026-10-08",
   "license": "Museum text; brief quotation and paraphrase"
  },
  "grave": {
   "title": "Johannes Grave, Wiesen bei Greifswald, joint museum anniversary chronicle",
   "url": "https://cdfriedrich.de/chronik/wiesen-bei-greifswald/",
   "sha256": "13d4ef24ab24d32dbfa3c73cf3fd23d87c8346ae5966621247a17d8970a5c1f8",
   "retrieved_at": "2026-10-08",
   "license": "Museum text; brief quotation and paraphrase; image marked Public Domain Mark 1.0"
  },
  "drawing": {
   "title": "Pommersches Landesmuseum, Friedrich in den Wiesen (page text; film not transcribed)",
   "url": "https://www.pommersches-landesmuseum.de/digitales/detail/friedrich-in-den-wiesen-stop-motion-film",
   "sha256": "b8ab0dd2b8c2ec24ee3808d309e9b836d227e8153ed2d19fc540f05380ceae71",
   "retrieved_at": "2026-10-08",
   "license": "Museum text; brief quotation and paraphrase"
  },
  "chronology": {
   "title": "Joint museum anniversary chronicle, entries for Friedrich’s 1806 journey",
   "url": "https://cdfriedrich.de/en/chronicle/?_chronicle_type=works,biography",
   "sha256": "ac9f8d9ccc2cdc26f92dd8e7bd880757bfe359c03eed6ca0620dafbb48971e81",
   "retrieved_at": "2026-10-08",
   "license": "Museum text; brief quotation and paraphrase"
  },
  "heck": {
   "title": "Kilian Heck, Buildings, Portraits and Trees (2018), pp. 5–6; DOI 10.12697/BJAH.2018.16.01",
   "url": "https://ojs.utlib.ee/index.php/bjah/article/download/BJAH.2018.16.01/11096",
   "sha256": "997ec4838d7d1265954e827099640e134e783bd2fc63b63389e8c5ff86426440",
   "retrieved_at": "2026-10-08",
   "license": "Publisher’s open-access article; brief quotation and paraphrase; no image reuse"
  },
  "heck-text": {
   "title": "PyMuPDF text extraction of Heck (2018)",
   "url": "https://ojs.utlib.ee/index.php/bjah/article/download/BJAH.2018.16.01/11096",
   "sha256": "db9acb98743fdb2a35b8ae1adc0c32302c59f1fb4f1a10f012d05be30bf942f3",
   "retrieved_at": "2026-10-08",
   "license": "Same article; local text extraction for quotation checking"
  },
  "frenssen": {
   "title": "Simon Elson, Ein Caspar David Friedrich für Greifswald (Weltkunst, 4 September 2017), reporting Birte Frenssen",
   "url": "https://www.weltkunst.de/kunstwissen/2017/09/ein-caspar-david-friedrich-fuer-greifswald",
   "sha256": "0b1e0a9a809aa55b07c553e60516ad11efc71e51c4ce1e429cf11727ce23c2c7",
   "retrieved_at": "2026-10-08",
   "license": "Copyright Weltkunst; attributed paraphrase only"
  },
  "berlin": {
   "title": "Kadow, Wentzel, Jaekel, Bahlo and Cubasch (2016), Berlin Climate Record: daily mean temperature, 1766–1934",
   "url": "https://doi.pangaea.de/10.1594/PANGAEA.869767?format=textfile",
   "sha256": "c58698c3da82e2dfc370474f466009bd68a649ed936873b15b9f25e6d725d269",
   "retrieved_at": "2026-10-08",
   "license": "CC BY-SA 3.0; PANGAEA. Berlin-derived data and chart shared under the same licence"
  },
  "dwd": {
   "title": "Deutscher Wetterdienst, daily climate station inventory (coverage check)",
   "url": "https://opendata.dwd.de/climate_environment/CDC/observations_germany/climate/daily/kl/historical/KL_Tageswerte_Beschreibung_Stationen.txt",
   "sha256": "dcfd7322e4ae3ddb9cef2619f2034b57945315a81ae64e3913daf8096bc81c7b",
   "retrieved_at": "2026-10-08",
   "license": "CC BY 4.0, Deutscher Wetterdienst; cached terms dated May 2024"
  },
  "lund": {
   "title": "SMHI, Lund 53430, monthly mean air temperature, corrected archive (coverage check)",
   "url": "https://opendata-download-metobs.smhi.se/api/version/latest/parameter/22/station/53430/period/corrected-archive/data.csv",
   "sha256": "a3efc3fe42bb13d06841bef8b49cb6ca30db5c6c38763ddc03f376f5aef93108",
   "retrieved_at": "2026-10-08",
   "license": "SMHI open data; CC BY 4.0, attribution SMHI"
  },
  "dmi": {
   "title": "John Cappelen, ed., DMI Report 21-02 (2021), tables 16 and 57: Copenhagen candidate metadata",
   "url": "https://www.dmi.dk/fileadmin/Rapporter/2021/DMIRep21-02.pdf",
   "sha256": "560d4dc726e995a8f51922357a62fecfaedab06f7fe00ac2443cdb183200239c",
   "retrieved_at": "2026-10-08",
   "license": "DMI permits data publication with reference and acknowledgment; candidate documentation, no Copenhagen values used"
  },
  "place": {
   "title": "OpenStreetMap, Greifswald city reference point (relation 62363)",
   "url": "https://nominatim.openstreetmap.org/search?q=Greifswald&format=json&limit=1",
   "sha256": "d3dc9b0e18f683542a76c390e88da54090064fbeffbfacb177c82c52de06e1b9",
   "retrieved_at": "2026-10-08",
   "license": "ODbL 1.0, OpenStreetMap contributors; not the exact drawing viewpoint"
  },
  "object": {
   "title": "Wikimedia Commons, object metadata: accession 1047",
   "url": "https://commons.wikimedia.org/wiki/File:Wiesen_bei_Greifswald_(1821-1822)_-_Caspar_David_Friedrich_(Hamburger_Kunsthalle).jpg",
   "sha256": "8ab8775b198a2ed6bc301e6dff95ee7a50ee3846e94881ba7312f53bdab179b1",
   "retrieved_at": "2026-10-08",
   "license": "Commons file metadata CC BY-SA; image on this page comes instead from the museum chronicle"
  },
  "image": {
   "title": "Friedrich, Wiesen bei Greifswald, Hamburger Kunsthalle / bpk, photo Elke Walford",
   "url": "https://cdfriedrich.de/wp-content/uploads/2023/09/HKH-60694-scaled.jpg.webp",
   "sha256": "44e14c039a30932c7e817aab6ea7f9f8a7f172ed1e0b206b6bbecc9bba00c4a8",
   "retrieved_at": "2026-10-08",
   "license": "Public Domain Mark 1.0, explicitly stated on the cached museum chronicle page"
  }
 }
}