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Recent increase in catastrophic tropical cyclone flooding in coastal North Carolina USA: Long-term observations suggest a regime shift

机译:美国北卡罗来纳州沿海地区最近发生的灾难性热带气旋洪水增加:长期观察表明政权发生了转变

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摘要

Coastal North Carolina, USA, has experienced three extreme tropical cyclone-driven flood events since 1999, causing catastrophic human impacts from flooding and leading to major alterations of water quality, biogeochemistry, and ecological conditions. The apparent increased frequency and magnitudes of such events led us to question whether this is just coincidence or whether we are witnessing a regime shift in tropical cyclone flooding and associated ecosystem impacts. Examination of continuous rainfall records for coastal NC since 1898 reveals a period of unprecedentedly high precipitation since the late-1990’s, and a trend toward increasingly high precipitation associated with tropical cyclones over the last 120 years. We posit that this trend, which is consistent with observations elsewhere, represents a recent regime shift with major ramifications for hydrology, carbon and nutrient cycling, water and habitat quality and resourcefulness of Mid-Atlantic and possibly other USA coastal regions.
机译:自1999年以来,美国北卡罗来纳州沿海地区经历了3次极端的热带气旋驱动的洪水事件,造成洪水造成的灾难性人类影响,并导致水质,生物地球化学和生态条件发生重大变化。这些事件的频率和强度明显增加,这使我们怀疑这是否只是巧合,还是我们目睹了热带气旋洪水和相关生态系统影响的变化。对1898年以来沿海NC连续降雨记录的检查显示,自1990年代后期以来,出现了前所未有的高降水期,并且在过去120年中,热带气旋使降水量呈逐渐增加的趋势。我们认为,这种趋势与其他地方的观察结果一致,代表了最近的政权转移,对水文,碳和养分循环,水和生境质量以及中大西洋乃至其他美国沿海地区的资源丰富性产生了重大影响。

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