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首页> 外文期刊>Geophysical Research Letters >Evaluation of precipitation in the Intermountain Region as simulated by the NARCCAP regional climate models
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Evaluation of precipitation in the Intermountain Region as simulated by the NARCCAP regional climate models

机译：NARCCAP区域气候模型模拟的山间地区降水评估

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摘要

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 Nino-Southern Oscillation (ENSO) found in the central IR.Therefore, caution is advised when interpreting the simulated NARCCAP precipitation for the IR.
机译：我们评估了北美地区气候变化评估计划（NARCCAP）的六个地区气候模型所产生的山间地区（IR）的降水气候。降水的年，半年度周期及其不同阶段的复杂组合形成了IR上的四个主要气候体制。每种模式都会在中央IR中产生系统性偏差，这些不同的气候制度在此相遇。普遍模拟的年周期太强，冬季降水太大。另一方面，半年周期相对较好地产生。强劲的年周期和过多的冬季降水掩盖了春季/夏季降水的信号，并可能导致中央IR中出现厄尔尼诺-南方涛动（ENSO）的错误信号，因此在解释模拟NARCCAP时应谨慎行事。为IR沉淀。

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