Das NCEP/NCAR Reanalysis Project ist ein gemeinsames Projekt des National Centers for Environmental Prediction (NCEP, früher „NMC“) und des National Center for Atmospheric Research (NCAR). Ziel dieser gemeinsamen Bemühungen ist es, neue atmosphärische Analysen mit historischen Daten sowie Analysen des aktuellen atmosphärischen Zustands (Climate Data Assimilation System, CDAS) zu erstellen. Im Projekt „NCEP/NCAR Reanalysis 1“ wird ein hochmodernes Analyse-/Vorhersagesystem verwendet, um Datenassimilation mit Daten aus der Vergangenheit von 1948 bis heute durchzuführen. Die Daten haben eine zeitliche Auflösung von 6 Stunden (0000, 0600, 1200 und 1800 UTC) und eine räumliche Auflösung von 2, 5 Grad.
Bänder
Pixelgröße 278.300 Meter
Bänder
Name
Einheiten
Min.
Max.
Pixelgröße
Beschreibung
pr_wtr
kg/m²
–8,2*
89,8*
Meter
Gesamter Wasserdampf in der Säule
* geschätzter Mindest- oder Höchstwert
Nutzungsbedingungen
Nutzungsbedingungen
Für die Verwendung dieser Datasets gibt es keine Einschränkungen.
Das NCEP/NCAR Reanalysis Project ist ein gemeinsames Projekt des National Centers for Environmental Prediction (NCEP, früher „NMC“) und des National Center for Atmospheric Research (NCAR). Ziel dieser gemeinsamen Bemühungen ist es, neue atmosphärische Analysen auf der Grundlage historischer Daten sowie Analysen der aktuellen…
[null,null,[],[[["\u003cp\u003eThe NCEP/NCAR Reanalysis 1 project provides atmospheric data from 1948 to present with a 6-hour temporal and 2.5-degree spatial resolution.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset, provided by NCEP, offers insights into total column water vapor, valuable for climate and atmospheric studies.\u003c/p\u003e\n"],["\u003cp\u003eData is accessible via Earth Engine using the \u003ccode\u003eee.ImageCollection("NCEP_RE/surface_wv")\u003c/code\u003e snippet.\u003c/p\u003e\n"],["\u003cp\u003eThere are no restrictions on the use of this dataset.\u003c/p\u003e\n"]]],[],null,["Dataset Availability\n: 1948-01-01T00:00:00Z--2025-09-02T18:00:00Z\n\nDataset Provider\n:\n\n\n [NCEP](https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.html)\n\nCadence\n: 6 Hours\n\nTags\n:\n [atmosphere](/earth-engine/datasets/tags/atmosphere) [climate](/earth-engine/datasets/tags/climate) [geophysical](/earth-engine/datasets/tags/geophysical) [ncep](/earth-engine/datasets/tags/ncep) [noaa](/earth-engine/datasets/tags/noaa) [reanalysis](/earth-engine/datasets/tags/reanalysis) [vapor](/earth-engine/datasets/tags/vapor) \nprecipitable \n\nDescription \nThe NCEP/NCAR Reanalysis Project is a joint project between the National\nCenters for Environmental Prediction (NCEP, formerly \"NMC\") and the\nNational Center for Atmospheric Research (NCAR). The goal of this joint\neffort is to produce new atmospheric analyses using historical data as\nwell as to produce analyses of the current atmospheric state (Climate Data\nAssimilation System, CDAS). The NCEP/NCAR Reanalysis 1 project is using a\nstate-of-the-art analysis/forecast system to perform data assimilation using\npast data from 1948 to the present. The data have 6-hour temporal\nresolution (0000, 0600, 1200, and 1800 UTC) and 2.5 degree spatial\nresolution.\n\nBands\n\n\n**Pixel Size**\n\n278300 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|----------|---------|--------|--------|------------|--------------------------|\n| `pr_wtr` | kg/m\\^2 | -8.2\\* | 89.8\\* | meters | Total column water vapor |\n\n\\* estimated min or max value\n\nTerms of Use\n\n**Terms of Use**\n\nThere are no restrictions on the use of these datasets.\n\nCitations \nCitations:\n\n- Kalnay et al., 1996, The NCEP/NCAR 40-Year Reanalysis Project. Bull. Amer.\n Meteor. Soc., 77, 437-471.\n [doi:10.1175/1520-0477(1996)077](https://doi.org/10.1175/1520-0477(1996)077%3C0437:TNYRP%3E2.0.CO;2)[0437:TNYRP\\\\](/earth-engine/datasets/catalog/0437:TNYRP%5C)2.0.CO;2.\n\nExplore with Earth Engine **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\nCode Editor (JavaScript) \n\n```javascript\nvar dataset = ee.ImageCollection('NCEP_RE/surface_wv')\n .filter(ee.Filter.date('2018-08-01', '2018-08-15'));\nvar totalColumnWaterVapor = dataset.select('pr_wtr');\nvar totalColumnWaterVaporVis = {\n min: 0.0,\n max: 60.0,\n palette: ['0000ff', '00ffff', '008000', 'ffff00', 'ff0000'],\n};\nMap.setCenter(-158.2, 2.81, 2);\nMap.addLayer(\n totalColumnWaterVapor, totalColumnWaterVaporVis,\n 'Total Column Water Vapor');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NCEP_RE/NCEP_RE_surface_wv) \n[NCEP/NCAR Reanalysis Data, Water Vapor](/earth-engine/datasets/catalog/NCEP_RE_surface_wv) \nThe NCEP/NCAR Reanalysis Project is a joint project between the National Centers for Environmental Prediction (NCEP, formerly \"NMC\") and the National Center for Atmospheric Research (NCAR). The goal of this joint effort is to produce new atmospheric analyses using historical data as well as to produce analyses of the current ... \nNCEP_RE/surface_wv, atmosphere,climate,geophysical,ncep,noaa,reanalysis,vapor \n1948-01-01T00:00:00Z/2025-09-02T18:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.html)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NCEP_RE_surface_wv)"]]
