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| DOI | 10.1175/JCLI-D-20-0094.1 |
| Trends and variability in airmass frequencies: Indicators of a changing climate | |
| Lee C.C. | |
| 发表日期 | 2020 |
| ISSN | 0894-8755 |
| 起始页码 | 8603 |
| 结束页码 | 8617 |
| 卷号 | 33期号:19 |
| 英文摘要 | Recent international efforts at communicating climate change have begun using the notion of a climate indicator—a climate-related metric that can be used to track changes in the Earth system over time. Based upon a recently developed global-scale classification of daily air masses, this research examines the trends and variability in the frequencies of these air masses and then utilizes them to develop two nontraditional climate indicators: a warm/cool index (WCI) and a global extremes index (GEI). Results show that both indices trend significantly upward over the 40-yr period of record, indicating an increase in warm-based air masses (WCI) and extreme air masses (GEI). The two indices also exhibit a moderate (GEI) to strong (WCI) association with the global mean temperature record, multiple near-surface climate variables, and other existing climate indicators over that same time, showing promise as global indicators. Shorter-term variability in these indices also show a linear relationship between the WCI and changes in the Atlantic multidecadal oscillation and a nonlinear relationship between GEI and El Niño–Southern Oscillation. While many published climate indicators are based upon a single variable, and/or are regional in scope, the two indices presented herein are unique in that they are representative of the trends in the multivariate (and extreme, in the case of the GEI) weather conditions that are experienced near Earth’s surface, while also being global in scope. Ó 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses). |
| 英文关键词 | Atmospheric pressure; Earth (planet); American meteorological societies; Atlantic multidecadal oscillations; Climate indicators; Copyright informations; Global-mean temperature; Linear relationships; Non-linear relationships; Southern oscillation; Climate change; air mass; climate change; El Nino-Southern Oscillation; extreme event; frequency analysis; temperature anomaly; trend analysis |
| 语种 | 英语 |
| 来源期刊 | Journal of Climate
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/171097 |
| 作者单位 | Kent State University, Kent, OH, United States |
| 推荐引用方式 GB/T 7714 | Lee C.C.. Trends and variability in airmass frequencies: Indicators of a changing climate[J],2020,33(19). |
| APA | Lee C.C..(2020).Trends and variability in airmass frequencies: Indicators of a changing climate.Journal of Climate,33(19). |
| MLA | Lee C.C.."Trends and variability in airmass frequencies: Indicators of a changing climate".Journal of Climate 33.19(2020). |
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