Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5180 |
Assessing the climatic and environmental impacts of mid-tropospheric anticyclones over Alaska | |
McLeod, Jordan T.1; Ballinger, Thomas J.2; Mote, Thomas L.3 | |
2018 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:1页码:351-364 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Ongoing climatic and cryospheric changes observed throughout the greater Alaska region are interconnected and often linked to oceanic and atmospheric patterns and processes that operate on varying spatiotemporal scales. To evaluate the long-term, mid-tropospheric circulation field across Alaska, and possible connections to climate and environmental change in the Pacific sector of the Arctic, the Alaska Blocking Index (ABI) is developed over the domain (54 degrees-76 degrees N, 125 degrees-180 degrees W) using daily gridded 500hPa geopotential height fields derived from the ERA-40 (1958-1978) and ERA-Interim (1979-2014) data sets, 1958-2014. Climatological characteristics of the seasonal and annual ABI conditions are evaluated and periods of prevalent blocking conditions are identified and subsequently linked to possible local and large-scale forcing mechanisms. The ABI has exhibited positive trends during all seasons and annually since 1979. Many of the extreme high ABI values occurred since 2000, including the highest annual values in 2013 and 2014. Anomalous blocking patterns in all seasons are associated with diminished snow depth and sea-ice cover, positive near-surface air temperature anomalies, and anticyclonic flows of heat and moisture across the domain. The ABI is also shown to differ from the long-term variability and atmospheric circulation responses associated with phases of the Pacific-North American pattern and Pacific Decadal Oscillation, revealing some notable spatial and temporal disconnects between the region-centric, high-latitude blocking flow and some of the predominant modes of sea surface temperature and middle tropospheric circulation variability in the Northern Hemisphere. |
英文关键词 | atmospheric blocking Alaska Arctic amplification teleconnections |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419093600025 |
WOS关键词 | SEA-ICE LOSS ; NORTHERN-HEMISPHERE BLOCKING ; ARCTIC AMPLIFICATION ; MIDLATITUDE WEATHER ; ATMOSPHERIC CIRCULATION ; GEOPOTENTIAL HEIGHT ; PACIFIC ; TRENDS ; VARIABILITY ; PATTERNS |
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/37123 |
专题 | 气候变化 |
作者单位 | 1.Univ North Carolina Chapel Hill, Dept Geog, Southeast Reg Climate Ctr, Chapel Hill, NC USA; 2.Texas State Univ, Dept Geog, San Marcos, TX USA; 3.Univ Georgia, Dept Geog, Athens, GA 30602 USA |
推荐引用方式 GB/T 7714 | McLeod, Jordan T.,Ballinger, Thomas J.,Mote, Thomas L.. Assessing the climatic and environmental impacts of mid-tropospheric anticyclones over Alaska[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(1):351-364. |
APA | McLeod, Jordan T.,Ballinger, Thomas J.,&Mote, Thomas L..(2018).Assessing the climatic and environmental impacts of mid-tropospheric anticyclones over Alaska.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(1),351-364. |
MLA | McLeod, Jordan T.,et al."Assessing the climatic and environmental impacts of mid-tropospheric anticyclones over Alaska".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.1(2018):351-364. |
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