CPC UPP

Description: This data set is part of products suite from the CPC Unified Precipitation Project(UPP) that are underway at NOAA Climate Prediction Center (CPC). The primary goal of the project is to create a suite of unified precipitation products with consistent quantity and improved quality by combining all information sources available at CPC and by taking advantage of the optimal interpolation (OI) objective analysis technique. There are two datasets in Climate Engine from this product suite: 

• Global dataset: a dataset covering the globe at 1/2-deg resolution.
• CONUS dataset: The gauge analysis here covers the conterminous United States(CONUS) on a fine-resolution and is quantitatively consistent with that covering the global land on a coarser resolution.

See the CPC's data docs for more details or email them.

Organization: NOAA Physical Sciences Laboratory

Spatial resolution: Global: 55-km (1/2-deg x 1/2-deg), CONUS: 28km (1/4-deg x 1/4-deg) 

Time Span: Global: 1979-01-01 to Present, CONUS: 1948-01-01 to Present (updated daily)

Variables:

• Minimum/maximum/mean temperature(Global only) 
• Precipitation (CONUS and Global)

Website: NOAA CPC Global Precipitation Website

Google Earth Engine: 

• These two datasets are not publicly available on Google Earth Engine yet. Climate Engine accesses this data as a private GEE asset. Please contact us for more information.

Terms of Use:

• If you acquire CPC Global Unified Gauge-Based Analysis of Daily Precipitation data products from PSL, we ask that you acknowledge us in your use of the data. This may be done by including text such as CPC Global Unified Gauge-Based Analysis of Daily Precipitation data provided by the NOAA PSL, Boulder, Colorado, USA, from their website at https://psl.noaa.gov in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSL to justify keeping the data freely available online in the future.

References:

• (Interpolation algorithm) Xie_et_al_2007_JHM_EAG.pdf Xie, P., A. Yatagai, M. Chen, T. Hayasaka, Y. Fukushima, C. Liu, and 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.
• (Construction of the Daily Gauge Analysis) Chen_et_al_2008_Daily_Gauge_Anal.pdf Chen, M., P. Xie, and Co-authors (2008), CPC Unified Gauge-based Analysis of Global Daily Precipiation, Western Pacific Geophysics Meeting, Cairns, Australia, 29 July - 1 August, 2008.