Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aaf52c |
Assessing uncertainties in sea ice extent climate indicators | |
Meier, Walter N.; Stewart, J. Scott | |
2019-03-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
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ISSN | 1748-9326 |
出版年 | 2019 |
卷号 | 14期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The uncertainties in sea ice extent (total area covered by sea ice with concentration >15%) derived from passive microwave sensors are assessed in two ways. Absolute uncertainty (accuracy) is evaluated based on the comparison of the extent between several products. There are clear biases between the extent from the different products that are of the order of 500 000 to 1 x 10(6) km(2) depending on the season and hemisphere. These biases are due to differences in the algorithm sensitivity to ice edge conditions and the spatial resolution of different sensors. Relative uncertainty is assessed by examining extents from the National Snow and Ice Data Center Sea Ice Index product. The largest source of uncertainty, similar to 100 000 km(2), is between near-real-time and final products due to different input source data and different processing and quality control. For consistent processing, the uncertainty is assessed using different input source data and by varying concentration algorithm parameters. This yields a relative uncertainty of 30 000-70 000 km(2). The Arctic minimum extent uncertainty is similar to 40 000 km(2). Uncertainties in comparing with earlier parts of the record may be higher due to sensor transitions. For the first time, this study provides a quantitative estimate of sea ice extent uncertainty. |
英文关键词 | sea ice sea ice extent Arctic Antarctic remote sensing passive microwave climate change indicator |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000460971300002 |
WOS关键词 | ALGORITHM |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/32130 |
专题 | 气候变化 |
作者单位 | Univ Colorado, Cooperat Inst Res Environm Sci, Natl Snow & Ice Data Ctr, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Meier, Walter N.,Stewart, J. Scott. Assessing uncertainties in sea ice extent climate indicators[J]. ENVIRONMENTAL RESEARCH LETTERS,2019,14(3). |
APA | Meier, Walter N.,&Stewart, J. Scott.(2019).Assessing uncertainties in sea ice extent climate indicators.ENVIRONMENTAL RESEARCH LETTERS,14(3). |
MLA | Meier, Walter N.,et al."Assessing uncertainties in sea ice extent climate indicators".ENVIRONMENTAL RESEARCH LETTERS 14.3(2019). |
条目包含的文件 | 条目无相关文件。 |
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