Characteristics of extreme daily precipitation events over the Canadian Arctic
Characteristics of extreme daily precipitation events over the Canadian Arctic
复制标题
加拿大北极地区极端日降水事件的特征
DOI：
10.1002/joc.7907
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Crawford, Alex
中科院分区：
文献类型：
--
作者：
Serreze, Mark C.;Voveris, Jessica;Barrett, Andrew P.;Fox, Shari;Blanken, Peter D.;Crawford, Alex
鉴于人们对极端高纬度天气事件的兴趣日益增加，我们使用来自9个气象站的记录和大气再分析数据来检查加拿大北极地区的极端日降水事件（领先、99和95百分位）。主要的活动范围从巴芬岛东南海岸的代尔角（Cape Dyer）的90毫米到班克斯岛西南海岸的萨克斯港（Sachs Harbour）的26毫米。第95个百分位数占主要事件规模的20%到30%。极端事件在气候降水高峰月份或附近最为常见。与欧亚大陆站点7月降水高峰对应可降水量的季节高峰相比，加拿大北极地区降水的季节周期和极端事件的频率变化更大，反映了海洋的影响。在代尔角和克莱德河，平均降水和极端事件的频率在10月份达到峰值，当时大气正在迅速冷却，促进了巴芬湾的强烈蒸发。在所有站点，主要事件都涉及降雪和强风，并与气旋通道（主要是相对较强的风暴）有关。它们还涉及强大的蒸气通量，有时与大气河流或其残余物有关。这里发现的最不寻常的事件序列发生在克莱德河，有记录以来最大的三次降水事件发生在1977年4月。事实证明，要获得这一系列事件的第一手资料是很难的。已经确定的极端事件与大气河流之间的联系表明，有必要更好地了解这些特征在未来将如何变化。
Given growing interest in extreme high‐latitude weather events, we use records from nine meteorological stations and atmospheric reanalysis data to examine extreme daily precipitation events (leading, 99th and 95th percentile) over Arctic Canada. Leading events span 90 mm at Cape Dyer, along the southeast coast of Baffin Island, to 26 mm at Sachs Harbour, on the southwest coast of Banks Island. The 95th percentiles range from 20 to 30% of leading event sizes. Extreme events are most common on or near the month of climatological peak precipitation. Contrasting with Eurasian continental sites having a July precipitation peak corresponding to the seasonal peak in precipitable water, seasonal cycles in precipitation and the frequency of extremes over Arctic Canada are more varied, reflecting marine influences. At Cape Dyer and Clyde River, mean precipitation and the frequency of extremes peak in October when the atmosphere is quickly cooling, promoting strong evaporation from Baffin Bay. At all stations, leading events involved snowfall and strong winds and were associated with cyclone passages (mostly of relatively strong storms). They also involved strong vapour fluxes, sometimes associated with atmospheric rivers or their remnants. The most unusual sequence of events identified here occurred at Clyde River, where the three largest recorded precipitation events occurred in April of 1977. Obtaining first‐hand accounts of this series of events has proven elusive. Identified links between extreme events and atmospheric rivers demonstrates the need to better understand how the characteristics of such features will change in the future.
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影响因子：
12.1
作者：
J. Walsh;T. Ballinger;E. Euskirchen;Edward Hanna;J. Mård;J. Overland;H. Tangen;T. Vihma;T. Vihma
通讯作者：
J. Walsh;T. Ballinger;E. Euskirchen;Edward Hanna;J. Mård;J. Overland;H. Tangen;T. Vihma;T. Vihma
影响因子：
16.6
作者：
McCrystall MR;Stroeve J;Serreze M;Forbes BC;Screen JA
通讯作者：
Screen JA
影响因子：
5.4
作者：
R. Mo;Rita So;M. Brugman;C. Mooney;Anthony Q. Liu;M. Jakob;Armel Castellan;R. Vingarzan
通讯作者：
R. Mo;Rita So;M. Brugman;C. Mooney;Anthony Q. Liu;M. Jakob;Armel Castellan;R. Vingarzan
使用 ERA5 北半球气旋探测和跟踪结果对精细空间和时间分辨率的敏感性
DOI：
--
发表时间：
2021
期刊：
影响因子：
--
作者：
A. Crawford;E. Schreiber;Nathan Sommer;M. Serreze;J. Stroeve;D. Barber
通讯作者：
D. Barber
影响因子：
8
作者：
F. Ralph;M. Dettinger;D. Lavers;I. Gorodetskaya;Andrew Martin;M. Viale;A. White;N. Oakley;J. Rutz;J. Spackman;H. Wernli;J. Cordeira
通讯作者：
F. Ralph;M. Dettinger;D. Lavers;I. Gorodetskaya;Andrew Martin;M. Viale;A. White;N. Oakley;J. Rutz;J. Spackman;H. Wernli;J. Cordeira