Agriculture

Montana Climate Variability Map

[NOTE:  This application is no longer available due to lack of funding support for the host of the application.  The MCO is planning to rebuild this application on the MCO website during 2017.]

The Montana Climate Variability Map application was funded by the Montana Fertilizer Advisory Committee through the MT Fertilizer Tax Research Fund awarded to Dr. Bruce Maxwell, Dr. Judit Barroso, and Dr. Clain Jones, Montana State University, Land Resources and Environmental Sciences with dditional support from the Montana Climate Office. This web application is a development prototype, and was inspired by the University of Washington Climate Impact Group's Pacific Northwest Climate Maps.  In the near future this web application will be ported to the Montana Climate Office web server.

The phase of the El Niño Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) serve as some of the best predictors of mid-range climate conditions. This web application provides a tool to explore the interactions of the two oscillations and how they impact Montana climate across the state.

The dataset includes years from 1915-2011. Results are reported as anomalies, or departures from the average values of the entire length of record. The anomalies are calculated as the average of the years between 1915 and 2011 that meet the conditions specified in the drop down menus minus the average of the full historical record. Results are given in millimeters and °C for precipitation and temperature, respectively.

The overall methodology is based on the University of Washington Climate Impact Group's (UW-CIG) Pacific Northwest Climate Maps. If you are interested in more details please visit the UW-CIG About these Maps webpage.

The interpolated climate data used to calculate the anomalies was provided by: Livneh, B., E. A. Rosenberg, C. Lin, B. Nijssen, V. Mishra, K. M. Andreadis, E. P. Maurer, and D. P. Lettenmaier, 2013: A Long-Term Hydrologically Based Dataset of Land Surface Fluxes and States for the Conterminous United States: Update and Extensions. J. Climate, 26, 9384~9392

Climate and Agriculture in the Marias-Missouri Sub-basin of Montana