气候变化领域集成服务门户(CCPortal): Systematic differences in bucket sea surface temperatures caused by misclassification of engine room intake measurements

CCPortal

DOI	10.1175/JCLI-D-19-0972.1
	Systematic differences in bucket sea surface temperatures caused by misclassification of engine room intake measurements
	Chan D.; Huybers P.
发表日期	2020
ISSN	0894-8755
起始页码	7735
结束页码	7753
卷号	33 期号:18
英文摘要	Differences in sea surface temperature (SST) biases among groups of bucket measurements in the International Comprehensive Ocean–Atmosphere Dataset, version 3.0 (ICOADS3.0), were recently identified that introduce offsets of as much as 18C and have first-order implications for regional temperature trends. In this study, the origin of these groupwise offsets is explored through covariation between offsets and diurnal cycle amplitudes. Examination of an extended bucket model leads to expectations for offsets and amplitudes to covary in either sign, whereas misclassified engine room intake (ERI) temperatures invariably lead to negative covariance on account of ERI measurements being warmer and having a smaller diurnal amplitude. An analysis of ICOADS3.0 SST measurements that are inferred to come from buckets indicates that offsets after the 1930s primarily result from the misclassification of ERI measurements in points of five lines of evidence. 1) Prior to when ERI measurements become available in the 1930s, offset–amplitude covariance is weak and generally positive, whereas covariance is stronger and generally negative subsequently. 2) The introduction of ERI measurements in the 1930s is accompanied by a wider range of offsets and diurnal amplitudes across groups, with 3) approximately 20% of estimated diurnal amplitudes being significantly smaller than buoy and drifter observations. 4) Regressions of offsets versus amplitudes intersect independently determined end-member values of ERI measurements. 5) Offset-amplitude slopes become less negative across all regions and seasons between 1960 and 1980, when ERI temperatures were independently determined to become less warmly biased. These results highlight the importance of accurately determining measurement procedures for bias corrections and reducing uncertainty in historical SST estimates. Ó 2020 American Meteorological Society.
英文关键词	Atmospheric temperature; Engines; Submarine geophysics; Surface properties; Surface waters; Uncertainty analysis; American meteorological societies; Bias correction; Diurnal cycle; Engine rooms; Measurement procedures; Misclassifications; Sea surface temperature (SST); Temperature trends; Oceanography; accuracy assessment; air-sea interaction; amplitude; covariance analysis; regression analysis; sea surface temperature; temperature effect
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/171111
作者单位	Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Chan D.,Huybers P.. Systematic differences in bucket sea surface temperatures caused by misclassification of engine room intake measurements[J],2020,33(18).
APA	Chan D.,&Huybers P..(2020).Systematic differences in bucket sea surface temperatures caused by misclassification of engine room intake measurements.Journal of Climate,33(18).
MLA	Chan D.,et al."Systematic differences in bucket sea surface temperatures caused by misclassification of engine room intake measurements".Journal of Climate 33.18(2020).