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| DOI | 10.1175/JCLI-D-23-0138.1 |
| Thermodynamic and Dynamic Components of Winter Temperature Changes in Western Canada, 1950-2020 | |
| 发表日期 | 2024 |
| ISSN | 0894-8755 |
| EISSN | 1520-0442 |
| 起始页码 | 37 |
| 结束页码 | 2 |
| 卷号 | 37期号:2 |
| 英文摘要 | Most of the globe has experienced significant warming trends that have been attributed to anthropogenic cli-mate change. However, these rates of warming are also influenced by short-term climate fluctuations driven by atmospheric circulation dynamics, resulting in inconsistent trend magnitudes in both time and space. This research evaluated winter (December-February) temperature trends over 1950-2020 at 91 climate stations across British Columbia (BC), Alberta (AB), and Saskatchewan (SK), Canada, and determined the components attributed to thermodynamic and dynamic (atmo-spheric circulation) factors. A synoptic climatological approach was used to classify atmospheric circulation patterns in the midtroposphere, relate those patterns to surface temperature, and evaluate changes in frequency. Moderate to high tempera -ture increases over 71 years were found for most of the region, averaging 3.1 degrees C in southern SK to 4.1 degrees C in central-northern AB, and a maximum of 5.8 degrees C in northern BC. Low to moderate increases were found for southern BC, averaging 1.2 degrees C. Changes in atmospheric circulation accounted for 29% and 31% of observed temperature changes in central-northern BC and AB, respectively. Dynamic factors were a moderate driver in southern AB (18%) and central-northern SK (13%), and low in southern SK (5%). Negative dynamic contributions in southern BC (26%), suggest that atmospheric circulation changes counteracted thermodynamically driven temperature changes. Results were consistent with trend analyses, indicating this method is well suited for trend detection and identification of thermodynamic and dynamic drivers. Results of this re-search improve our understanding of the magnitude of winter temperature changes critical for informing adaptation and climate-related policy decisions. |
| 英文关键词 | Synoptic climatology; Climate change; Temperature; Internal variability |
| 语种 | 英语 |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:001136966000001 |
| 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/290507 |
| 作者单位 | Environment & Climate Change Canada |
| 推荐引用方式 GB/T 7714 | . Thermodynamic and Dynamic Components of Winter Temperature Changes in Western Canada, 1950-2020[J],2024,37(2). |
| APA | (2024).Thermodynamic and Dynamic Components of Winter Temperature Changes in Western Canada, 1950-2020.JOURNAL OF CLIMATE,37(2). |
| MLA | "Thermodynamic and Dynamic Components of Winter Temperature Changes in Western Canada, 1950-2020".JOURNAL OF CLIMATE 37.2(2024). |
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