GSTDTAP  > 气候变化
DOI10.1002/joc.4994
Atmospheric circulation patterns associated with monthly and daily temperature and precipitation extremes in Alaska
Bieniek, Peter A.; Walsh, John E.
2017-08-01
发表期刊INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN0899-8418
EISSN1097-0088
出版年2017
卷号37
文章类型Article
语种英语
国家USA
英文摘要

This study presents (1) the temporal variations and trends of monthly and daily temperature and precipitation extremes in Alaska, and (2) the synoptic-scale circulation patterns associated with these extremes. The analysis is based on daily station observations of maximum temperature, minimum temperature and precipitation from 1948-2012 as well as monthly average temperatures and precipitation from 1920-2012 from 13 Alaska climate divisions. The frequencies of daily and monthly temperature extremes show variability and trends over the past 50-90 years consistent with a warming climate in Alaska. This warming is superimposed on low-frequency variability attributed to the Pacific Decadal Oscillation. Unlike the temperature extremes, occurrences of heavy-precipitation extremes do not display a coherent signal through time. The changes do not appear to be linked with an overall increase in the variance of temperature or precipitation. Composite analysis of sea level pressure (SLP) anomalies associated with a representative sample of different daily and monthly temperature extremes across Alaska shows that temperature and moisture advection, subject to topographic and coastal influences, is a key driver of these events. Composite SLP fields for daily and monthly extremes are similar, especially in winter, indicating that monthly extremes represent the recurrence of daily extreme patterns during those extreme months. The SLP anomalies were also often reduced in magnitude in the summer events compared with winter, consistent with the lower variance of temperature and SLP during summer.


英文关键词climate extremes Alaska temperature precipitation atmospheric circulation
领域气候变化
收录类别SCI-E
WOS记录号WOS:000417298600015
WOS关键词CLIMATE DIVISIONS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/36955
专题气候变化
作者单位Univ Alaska Fairbanks, Int Arctic Res Ctr, Fairbanks, AK 99775 USA
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GB/T 7714
Bieniek, Peter A.,Walsh, John E.. Atmospheric circulation patterns associated with monthly and daily temperature and precipitation extremes in Alaska[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37.
APA Bieniek, Peter A.,&Walsh, John E..(2017).Atmospheric circulation patterns associated with monthly and daily temperature and precipitation extremes in Alaska.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37.
MLA Bieniek, Peter A.,et al."Atmospheric circulation patterns associated with monthly and daily temperature and precipitation extremes in Alaska".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37(2017).
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