The Influence of the MJO on the Intraseasonal Variability of Northern Hemisphere Spring Snow Depth
The Influence of the MJO on the Intraseasonal Variability of Northern Hemisphere Spring Snow Depth
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DOI：
10.1175/jcli-d-15-0092.1
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发表时间：
2015-09
影响因子：
4.9
通讯作者：
B. Barrett;G. Henderson;Joshua S. Werling
中科院分区：
文献类型：
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作者：
B. Barrett;G. Henderson;Joshua S. Werling
摘要研究了北方半球春季积雪深度日变化（ΔSD）的季节内变化。主要发现：1）在北美和欧亚大陆，MJO多个位相的滞后ΔSD异常区均出现在3月、4月和5月。2)各月滞后ΔSD距平均得到相应的500 hPa高度场（Z500）和地面气温（SAT）滞后距平的物理支持。斯皮尔曼等级相关系数表明，3月份第5期和第7期欧亚大陆和北美的Z500和ΔSD以及SAT和ΔSD之间存在中度至较强的相关性。4月，在第5阶段，在欧亚大陆上发现了Z500和ΔSD之间的中等强度关系，但SAT和ΔSD之间的关系很弱。5月，在60° ~ 75°N的半球范围内，ΔSD与Z500和SAT的相关性接近-0....
AbstractIntraseasonal variability in springtime Northern Hemisphere daily snow depth change (ΔSD) by phase of the MJO was explored in this study. Principal findings of the relationship between ΔSD and the MJO included the following: 1) Statistically significant regions of lagged ΔSD anomalies for multiple phases of the MJO were found in March, April, and May in both North America and Eurasia. 2) In each month, lagged ΔSD anomalies were physically supported by corresponding lagged anomalies of 500-hPa height (Z500) and surface air temperature (SAT). Spearman rank correlation coefficients indicated a moderate to strong relationship between both Z500 and ΔSD and SAT and ΔSD in both Eurasia and North America for phases 5 and 7 in March. In April, a moderately strong relationship between Z500 and ΔSD was found over Eurasia for phase 5, but the relationship between SAT and ΔSD was weak. In May, correlations between ΔSD and both Z500 and SAT over a hemisphere-wide latitude band from 60° to 75°N were close to −0....