An objective approach to predict the spatial property of anomalous rain-belt of Meiyu

An objective approach to predict the spatial property of anomalous rain-belt of Meiyu

Blog Article

The Meiyu 2020 with record-breaking amount of precipitation, widespread area coverage and anomalous northern location brought Neff D94BHM1N0B 90cm Black Stainless Steel Chimney Hood about great social and economic impacts in China.However, the spatial property of anomalous rain-belt for such a catastrophic Meiyu is not well predicted.In this study, high-resolution in-situ observation and reanalysis data are used to explore key signals and possible prediction method.Results show that anomalous rain-belt of Meiyu 2020 is mainly influenced by the westward extended western North Pacific subtropical high (WNPSH) in the low-latitude and enhanced meridional circulation in mid-high latitudes.

However, the distribution of composite anomalous circulation, especially in the mid-high latitude, cannot be revealed for 2020 if only considering the influence from the tropical Indo-Pacific thermal conditions.Through additional consideration of North Atlantic Oscillation (NAO), which has great contribution to circulation in the Northern Hemisphere mid-high latitudes, the anomalous key circulation features in 2020 can be appropriately captured.Also, the spatial property of anomalous rain-belt like 2020 could be accurately simulated by the established prediction model including combined effects of tropical Indo-Pacific thermal conditions and NAO.Specifically, quantified analyses prove that the warmed Indian Ocean plays a dominant role and anomalous NAO also has great importance for record-breaking area coverage and anomalous northern location of Meiyu 2020.

Thus, for a more accurate prediction for anomalous rain-belt such as Meiyu 2020, the combined effects of both Slip Covers low- and mid-high-latitudes should be comprehensively considered.