CPC Unified Gauge-Based Analysis of Global Daily Precipitation veri kümesi, 1979'dan günümüze kadar karadaki günlük yağış tahminlerini sunar.
NOAA'nın İklim Tahmin Merkezi (CPC) tarafından geliştirilen bu sistem, yağmur ölçerlerden oluşan küresel bir ağdan gelen verileri birleştirmek için optimum bir enterpolasyon tekniğinden yararlanır. Bu ağda, geriye dönük sürümüne (1979-2005) 30.000'den fazla, gerçek zamanlı sürümüne (2006-günümüz) ise yaklaşık 17.000 ölçer katkıda bulunur.
Veriler 0,5 derecelik çözünürlükte sağlanır ve hem yağış miktarlarını (0,1 mm cinsinden) hem de her bir ızgara hücresi için kullanılan ölçüm cihazlarının sayısını içerir. Bu sayede kullanıcılar veri kalitesini değerlendirebilir.
Veri kümesinin kalitesinin tropikal Afrika ve Antarktika'da düşük olduğu, genel olarak da ölçüm cihazı yoğunluğuna göre değiştiği kabul edilmektedir. Daha eksiksiz istasyon verileri kullanıma sunuldukça gerçek zamanlı verilerde değişiklik yapılabilir.
NOT: 1979-2005 arasındaki geçmiş veriler, veri setinin mevcut sürümünde kullanılamaz.
Bantlar
Piksel Boyutu 55.500 metre
Bantlar
Ad
Birimler
Min.
Maks.
Piksel Boyutu
Açıklama
precipitation
mm
0*
10671,5*
metre
Günlük toplam yağış tahmini (0,1 mm cinsinden)
num_gauges
0*
121*
metre
0,5 derecelik ızgara hücresinde yağış tahminine katkıda bulunan yağmur ölçerlerin sayısı
* tahmini minimum veya maksimum değer
Kullanım Şartları
Kullanım Şartları
NOAA CPC veri kümeleri, kullanım veya dağıtım konusunda herhangi bir kısıtlama olmaksızın kullanılabilir. NOAA PSL, kullanıcının uygun atıfta bulunmasını ve geçerli olduğu durumlarda NOAA PSL'yi verilerin kaynağı olarak tanımlamasını ister.
Alıntılar
Alıntılar:
(İnterpolasyon algoritması) Xie_et_al_2007_JHM_EAG.pdf Xie,
P., C. Yatagai, M. Chen, T. Hayasaka, Y. Fukushima, C. Liu ve S. Yang (2007), A gauge-based analysis of daily precipitation over East
Asia, J. Hydrometeorol., 8.607 626.
(Gauge Algorithm Evaluation) Chen_et_al_2008_JGR_Gauge_Algo.pdf
Chen, M., W. Shi, P. Xie, V. B. S. Silva, V E. Kousky, R. Wayne Higgins,
and J. E. Janowiak (2008), Assessing objective techniques for
gauge-based analyses of global daily precipitation,
J. Geophys. Res., 113, D04110,
doi:10.1029/2007JD009132
CPC Unified Gauge-Based Analysis of Global Daily Precipitation veri kümesi, 1979'dan günümüze kadar karada günlük yağış tahminleri sunar. NOAA'nın İklim Tahmin Merkezi (CPC) tarafından geliştirilen bu ürün, yağmur ölçerlerden oluşan küresel bir ağdan gelen verileri birleştirmek için optimum bir enterpolasyon tekniğinden yararlanır. 30.000'den fazla ölçüm cihazı katkıda bulunur.
[null,null,[],[[["\u003cp\u003eThe NOAA/CPC/Precipitation dataset provides daily precipitation estimates over global land areas from 1979 to present, using a gauge-based analysis.\u003c/p\u003e\n"],["\u003cp\u003eData is available at a 0.5-degree resolution and includes both precipitation amounts (in 0.1 mm) and the number of gauges used for each grid cell.\u003c/p\u003e\n"],["\u003cp\u003eWhile data quality is generally good, it's noted to be poor over tropical Africa and Antarctica, and real-time data (from 2006 onward) is subject to revision.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is freely available for use and distribution with proper attribution to NOAA PSL.\u003c/p\u003e\n"],["\u003cp\u003eHistorical data from 1979 to 2005 is not included in the current version available through Earth Engine.\u003c/p\u003e\n"]]],[],null,["Dataset Availability\n: 2006-01-01T00:00:00Z--2025-08-30T00:00:00Z\n\nDataset Provider\n:\n\n\n [NOAA Physical Sciences Laboratory](https://psl.noaa.gov/data/gridded/data.cpc.globalprecip.html)\n\nTags\n:\n[daily](/earth-engine/datasets/tags/daily) [noaa](/earth-engine/datasets/tags/noaa) [precipitation](/earth-engine/datasets/tags/precipitation) [weather](/earth-engine/datasets/tags/weather) \n\nDescription \nThe CPC Unified Gauge-Based Analysis of Global Daily Precipitation dataset\noffers daily precipitation estimates over land from 1979 to the present.\nDeveloped by NOAA's Climate Prediction Center (CPC), it leverages an optimal\ninterpolation technique to combine data from a global network of rain\ngauges, with over 30,000 gauges contributing to the retrospective version\n(1979-2005) and around 17,000 to the real-time version (2006-present).\nData is provided at a 0.5-degree resolution and includes both precipitation\namounts (in 0.1 mm) and the number of gauges used for each grid cell,\nallowing users to assess data quality.\n\nThe dataset's quality is acknowledged to be poor over tropical Africa and\nAntarctica, and generally varies with gauge density. Real-time data is\nsubject to revision as more complete station data becomes available.\n\n[This](https://ftp.cpc.ncep.noaa.gov/precip/CPC_UNI_PRCP/GAUGE_GLB/DOCU/)\nfolder has all the technical documentation.\n\nNOTE: The historical data spanning from 1979 to 2005 is not available in the\ncurrent version of the dataset.\n\nBands\n\n\n**Pixel Size**\n\n55500 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|-----------------|-------|-----|-----------|------------|--------------------------------------------------------------------------------------------------|\n| `precipitation` | mm | 0\\* | 10671.5\\* | meters | Daily total precipitation estimate in 0.1 mm |\n| `num_gauges` | | 0\\* | 121\\* | meters | Number of rain gauges contributing to the precipitation estimate within the 0.5-degree grid cell |\n\n\\* estimated min or max value\n\nTerms of Use\n\n**Terms of Use**\n\nThe NOAA CPC datasets are available without restriction\non use or distribution. NOAA PSL does request that the\nuser give proper attribution and identify NOAA PSL, where applicable,\nas the source of the data.\n\nCitations \nCitations:\n\n- (Interpolation algorithm) Xie_et_al_2007_JHM_EAG.pdf Xie,\n P., A. Yatagai, M. Chen, T. Hayasaka, Y. Fukushima, C. Liu, and\n S. Yang (2007), A gauge-based analysis of daily precipitation over East\n Asia, J. Hydrometeorol., 8, 607. 626.\n- (Gauge Algorithm Evaluation) Chen_et_al_2008_JGR_Gauge_Algo.pdf\n Chen, M., W. Shi, P. Xie, V. B. S. Silva, V E. Kousky, R. Wayne Higgins,\n and J. E. Janowiak (2008), Assessing objective techniques for\n gauge-based analyses of global daily precipitation,\n J. Geophys. Res., 113, D04110,\n [doi:10.1029/2007JD009132](https://doi.org/10.1029/2007JD009132)\n\nDOIs\n\n- \u003chttps://doi.org/10.1029/2007JD009132\u003e\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('NOAA/CPC/Precipitation')\n .filter(ee.Filter.date('2018-01-01', '2019-01-01'));\nvar precipitation = dataset.select('precipitation');\nvar precipitationVis = {\n min: 0,\n max: 150,\n palette: ['#ADD8E6', '#008000', '#FFFF00', '#FFA500', '#FF0000', '#800080'],\n};\nMap.setCenter(-68.36, -6.73, 3);\nMap.addLayer(precipitation, precipitationVis, 'NOAA CPC Precipitation');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NOAA/NOAA_CPC_Precipitation) \n[CPC Global Unified Gauge-Based Analysis of Daily Precipitation](/earth-engine/datasets/catalog/NOAA_CPC_Precipitation) \nThe CPC Unified Gauge-Based Analysis of Global Daily Precipitation dataset offers daily precipitation estimates over land from 1979 to the present. Developed by NOAA's Climate Prediction Center (CPC), it leverages an optimal interpolation technique to combine data from a global network of rain gauges, with over 30,000 gauges contributing to ... \nNOAA/CPC/Precipitation, daily,noaa,precipitation,weather \n2006-01-01T00:00:00Z/2025-08-30T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.1029/2007JD009132](https://doi.org/https://psl.noaa.gov/data/gridded/data.cpc.globalprecip.html)\n- [https://doi.org/10.1029/2007JD009132](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NOAA_CPC_Precipitation)"]]
