The 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 atmospheric state (Climate Data
Assimilation System, CDAS). The NCEP/NCAR Reanalysis 1 project is using a
state-of-the-art analysis/forecast system to perform data assimilation using
past data from 1948 to the present. The data have 6-hour temporal
resolution (0000, 0600, 1200, and 1800 UTC) and 2.5 degree spatial
resolution.
Bands
Pixel Size 278300 meters
Bands
Name
Units
Min
Max
Pixel Size
Description
air
K
187.3*
323.5*
meters
Surface air temperature
* estimated min or max value
Terms of Use
Terms of Use
There are no restrictions on the use of these datasets.
The 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 …
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eThe NCEP/NCAR Reanalysis 1 project provides surface air temperature data from 1948 to the present, with a temporal resolution of 6 hours and a spatial resolution of 2.5 degrees.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is a joint effort between the National Centers for Environmental Prediction (NCEP) and the National Center for Atmospheric Research (NCAR) to produce new atmospheric analyses using historical and current data.\u003c/p\u003e\n"],["\u003cp\u003eThe data is available in Earth Engine and can be accessed using the \u003ccode\u003eee.ImageCollection("NCEP_RE/surface_temp")\u003c/code\u003e code 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--2025-08-23T06:00:00Z\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) [temperature](/earth-engine/datasets/tags/temperature) \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| `air` | K | 187.3\\* | 323.5\\* | meters | Surface air temperature |\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_temp')\n .filter(ee.Filter.date('2018-08-01', '2018-08-15'));\nvar surfaceAirTemperature = dataset.select('air');\nvar surfaceAirTemperatureVis = {\n min: 230.0,\n max: 308.0,\n palette: [\n '800080', '0000ab', '0000ff', '008000', '19ff2b', 'a8f7ff', 'ffff00',\n 'd6d600', 'ffa500', 'ff6b01', 'ff0000'\n ],\n};\nMap.setCenter(71.72, 52.48, 3.0);\nMap.addLayer(\n surfaceAirTemperature, surfaceAirTemperatureVis, 'Surface Air Temperature');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NCEP_RE/NCEP_RE_surface_temp) \n[NCEP/NCAR Reanalysis Data, Surface Temperature](/earth-engine/datasets/catalog/NCEP_RE_surface_temp) \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_temp, atmosphere,climate,geophysical,ncep,noaa,reanalysis,temperature \n1948-01-01T00:00:00Z/2025-08-23T06:00:00Z \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_temp)"]]
