austin rainfall totals year to date 2019

ARs often linked to extratropical cyclones and fronts 4, 5, the key mechanisms of precipitation 8, 9 and play a critical role in extreme precipitation events 10 in the midlatitudes. 2, ARs are synoptic-scale filaments representing the 4 or 5 largest water vapour fluxes that occur between the midlatitudes and the tropics on any given day, and the length of an AR is generally five times its width. The results of this study extend the knowledge on the critical roles of ARs on hydrology and highlight the need for further investigation on the landfalling AR physical processes in relation to global circulation features and AR sources, and hydrological hazards caused by ARs in New Zealand.Ītmospheric rivers (ARs) are global phenomena primarily occurring in the midlatitudes, distinguished by filamentary regions of strong horizontal water vapour transport in the atmosphere 1, 2, 3, 4, 5, 6, 7. Furthermore, the median daily rainfall associated with ARs is 2–3 times than that associated with other storms. In these regions, depending on the season, 40–86% of the rainfall totals and 50–98% of extreme rainfall events are shown to be associated with ARs, with the largest contributions predominantly occurring during the austral summer.

Results indicate that these filamentary synoptic features play an essential role in regional water resources and are responsible for many extreme rainfall events on the western side of mountainous areas and northern New Zealand. Using an automated AR detection algorithm, daily rainfall records from 654 rain gauges, and various atmospheric reanalysis datasets, we investigate the climatology of ARs, the characteristics of landfalling ARs, the contribution of ARs to annual and seasonal rainfall totals, and extreme rainfall events between 19 across the country. This study quantifies the impact of atmospheric rivers (ARs) on rainfall in New Zealand.

Austin rainfall totals year to date 2019