Evaluation of precipitation in the Intermountain Region as simulated by the NARCCAP regional climate models

Details Evaluation of precipitation in the Intermountain Region as simulated by the NARCCAP regional climate models Evaluation of precipitation in the Intermountain Region as simulated by the NARCCAP regional climate models

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3611704w&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 11, CiteID L11704

Other

12

Atmospheric Processes: Climatology (1616, 1620, 3305, 4215, 8408), Hydrology: Hydroclimatology, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Global Change: Water Cycles (1836)

Scientific paper

We evaluated the precipitation climatology of the Intermountain Region (IR) as generated by the six regional climate models of the North American Regional Climate Change Assessment Program (NARCCAP). A complex combination of the precipitation annual and semiannual cycles with their different phases form four major climate regimes over the IR. Each model produces systematic biases in the central IR where these different climate regimes meet. The simulated annual cycles are universally too strong, and the winter precipitation is too large. On the other hand, the semiannual cycles are relatively well produced. The strong annual cycles and the excess winter precipitation obscure the signals of spring/summer precipitation and may have led to false signals of the El Niño-Southern Oscillation (ENSO) found in the central IR. Therefore, caution is advised when interpreting the simulated NARCCAP precipitation for the IR.

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