NMME Hindcast Seasonal Climatology

These maps display climatological values of forecast 2-meter temperature, sea surface temperature, and precipitation at multiple leads and start times during the year for a selection of climate models. The climatological base period is 1982-2010 for CFSv2, CCSM3, CCSM4, and GFDL-CM2p1 and 1981-2010 for CMC1, CMC2, GFDL-CM2p5-FLOR-A06, GFDL-CM2p5-FLOR-B01, and NASA-GMAO.

Use the drop-down menus at the top of the page to select the model, variable, and seasonal lead. Mouse over the map to select the forecast start time from a control that appears just above the map. Select a combination of the forecast start time and the 3-month seasonal lead time to produce a map for a target season of the year. The forecast starts occur at the beginning of a month of the year, and adding together the forecast start time and the lead time (3-month seasonal lead) determines the season for which the forecast is valid.

For example, for a seasonal forecast, the combination of a forecast start time of 0000 1 Sep and a 3-month seasonal lead of 1.5 months (the first seasonal lead) will produce a forecast map valid for the September-November 3-month season. The combination of a forecast start time of 0000 1 Sep and a 3-month seasonal lead of 2.5 months (the second seasonal lead) will produce a forecast map valid for the October-December season. The climatological forecast target time (climatological season -- the displayed year of 1960 or 1961 is not relevant -- see the climatological base periods above) and start time will appear at the bottom of the map.


In order to document NMME-Phase II data impact and enable continuing support, users of NMME data are expected to acknowledge NMME data and the participating modeling groups. The NMME model output should be referred to as "the NMME System Phase II data [https://www.earthsystemgrid.org/search.html?Project=NMME]." In publications, users should include a table (referred to below as Table XX) listing the models and institutions that provided model output used in the NMME-Phase II system, as well as the digital object identifier of publications documenting the models, where "Table XX" in the paper should list the models and modeling groups that provided the NMME data. In addition, an acknowledgement similar to the following should be included in any publication: "We acknowledge the agencies that support the NMME-Phase II system, and we thank the climate modeling groups (Environment Canada, NASA, NCAR, NOAA/GFDL, NOAA/NCEP, and University of Miami) for producing and making available their model output. NOAA/NCEP, NOAA/CTB, and NOAA/CPO jointly provided coordinating support and led development of the NMME-Phase II system." Besides the above acknowledgement, users should register any journal articles (or other scientific documents) that are based on NMME-Phase II results.


Kirtman, Ben P., and Coauthors, 2014: The North American Multimodel Ensemble: Phase-1 seasonal-to-interannual prediction; Phase-2 toward developing intraseasonal prediction. Bull. Amer. Meteor. Soc., 95, 585–601. doi: http://dx.doi.org/10.1175/BAMS-D-12-00050.1


Access the dataset used to create this map.

How to use this interactive map

Return to the menu page: Click the blue link called “Portal” at the top left corner of the page.


Contact help@iri.columbia.edu with any technical questions or problems with this Map Room.