A snowfall climatology of the Ohio River Valley, USA

IF 2.8 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES
Zachary J. Suriano, Harmony L. Guercio
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Abstract

Snowfall in the Ohio River Valley, USA, presents a relatively unique challenge due to the large gradient of event frequency and magnitude, and subsequent levels of preparation within local communities. Even relatively small magnitude events can cause widespread impacts due to available infrastructure. Here we present a climatology of snowfall conditions and events over a 74-year period using a network of daily observational stations across the region. Snowfall totals and event frequencies both exhibit a southwest to northeast gradient of increasing snowfall, where the majority of snowfall (> 80%) occurs during the core winter months of December through February. There is a clear influence of Lake Erie on snowfall conditions in the northeast corner of the domain, where snowfall frequency, totals, and trends are substantially higher within the lake belt relative to areas further inland. Over time, snowfall significantly increased downwind of Lake Erie by as much as 42%, while significant decreases of over 55% occurred in central Tennessee and eastern Ohio. Intra-seasonally, snowfall totals trended significantly less during November and March for much of the domain, suggesting a compression of the snowfall season to more core winter months. Trends in snowfall frequency were apparent for many sub-regions, however evidence here suggests the trends in snowfall totals were primarily driven by trends in snowfall magnitude per event.

Abstract Image

美国俄亥俄河谷降雪量气候图
美国俄亥俄河流域的降雪是一个相对独特的挑战,因为事件发生的频率和规模以及当地社区随后的准备水平存在很大的梯度。由于可用基础设施的限制,即使是相对较小的降雪量也会造成广泛的影响。在此,我们利用遍布该地区的日观测站网络,展示了 74 年间降雪条件和降雪事件的气候学特征。降雪总量和降雪事件频率都呈现出从西南到东北的梯度上升趋势,其中大部分降雪(80%)发生在 12 月到次年 2 月的核心冬季月份。伊利湖对该区域东北角的降雪情况有明显的影响,相对于更内陆的地区,湖带内的降雪频率、降雪总量和降雪趋势都要高得多。随着时间的推移,伊利湖下风向的降雪量大幅增加了 42%,而田纳西州中部和俄亥俄州东部的降雪量则大幅减少了 55%以上。从季节内来看,大部分地区 11 月和 3 月的降雪总量明显减少,这表明降雪季节被压缩到更核心的冬季月份。降雪频率的变化趋势在许多子区域都很明显,但这里的证据表明,降雪总量的变化趋势主要是由每次降雪量的变化趋势所驱动的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Theoretical and Applied Climatology
Theoretical and Applied Climatology 地学-气象与大气科学
CiteScore
6.00
自引率
11.80%
发文量
376
审稿时长
4.3 months
期刊介绍: Theoretical and Applied Climatology covers the following topics: - climate modeling, climatic changes and climate forecasting, micro- to mesoclimate, applied meteorology as in agro- and forestmeteorology, biometeorology, building meteorology and atmospheric radiation problems as they relate to the biosphere - effects of anthropogenic and natural aerosols or gaseous trace constituents - hardware and software elements of meteorological measurements, including techniques of remote sensing
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