Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.4808 |
Underestimated warming of northern Canada in the Berkeley Earth temperature product | |
Way, Robert G.1; Oliva, Frank1,2; Viau, Andre E.1,2 | |
2017-03-30 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2017 |
卷号 | 37期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | The Berkeley Earth surface temperature (BETP) project provides gridded global temperature anomaly products using an automated geostatistical approach to adjust station data for systematic biases. Despite its widespread usage, the BETP data set has not been evaluated at the national-scale, especially in data-sparse high latitude environments. This study provides an evaluation of the BETP product across all of Canada using 333 climate stations made available from the homogenized Environment Canada station network (HTcan). Comparison between co-located monthly air temperature anomalies for the two data sets suggests small differences between the two products for mean surface (approximate to 2 m) air temperature. However, the relatively minimal bias in mean temperature is a consequence of contrasting cold and warm biases in minimum and maximum air temperatures, respectively, that are larger but effectively even out when averaged together. The BETP product is shown to exhibit systematic underestimation of recent regional warming in northern Canada which when combined with an overestimation of warmth earlier in the record results in an observable reduction in warming rates for minimum and mean temperature anomalies since 1950. The temporal evolution and spatial pattern of the observed biases suggest that the BETP-automated adjustments to station data in northern Canada miss some inhomogeneities in the raw station data. These results highlight the need for enhanced data recovery and homogenization efforts in data-sparse high latitude regions and emphasize the importance of national-scale climate data sets for evaluating global gridded products. We also recommend caution when using the BETP minimum and maximum monthly air temperature products for long-term trend analyses. |
英文关键词 | air temperature climate change homogenization Arctic spatial analysis |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000397497700007 |
WOS关键词 | MINIMUM TEMPERATURE ; CLIMATOLOGICAL DAY ; DAILY MAXIMUM ; CLIMATE ; PRECIPITATION ; REANALYSIS ; TRENDS ; AIR ; VARIABILITY ; DATASETS |
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/37279 |
专题 | 气候变化 |
作者单位 | 1.Univ Ottawa, Dept Geog Environm & Geomat, Simard Hall,60 Univ Private, Ottawa, ON K1N 6N5, Canada; 2.Univ Ottawa, Lab Paleoclimatol & Climatol, Ottawa, ON, Canada |
推荐引用方式 GB/T 7714 | Way, Robert G.,Oliva, Frank,Viau, Andre E.. Underestimated warming of northern Canada in the Berkeley Earth temperature product[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(4). |
APA | Way, Robert G.,Oliva, Frank,&Viau, Andre E..(2017).Underestimated warming of northern Canada in the Berkeley Earth temperature product.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(4). |
MLA | Way, Robert G.,et al."Underestimated warming of northern Canada in the Berkeley Earth temperature product".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.4(2017). |
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