Examining the Influence of Recording System on the Pure Temperature Error in XBT Data

doi:10.1175/JTECH-D-20-0136.1

IOCAS-IR

	Examining the Influence of Recording System on the Pure Temperature Error in XBT Data
	Tan, Zhetao 1,2; Reseghetti, Franco 3; Abraham, John 4; Cowley, Rebecca 5; Chen, Keyi 6; Zhu, Jiang 1; Zhang, Bin 7,8; Cheng, Lijing 1,2,7
	2021-04-01
发表期刊	JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
ISSN	0739-0572
卷号	38 期号:4 页码:759-776
通讯作者	Reseghetti, Franco(franco.reseghetti@enea.it) ; Cheng, Lijing(chenglj@mail.iap.ac.cn)
摘要	Expendable bathythermographs (XBTs) have been widely deployed for ocean monitoring since the late 1960s. Improving the quality of XBT data is a vital task in climatology. Many factors (e.g., temperature, probe type, and manufacturing time) have been identified as major influences of XBT systematic bias. In addition, the recording system (RS) has long been suspected as another factor. However, this factor has not been taken into account in any global XBT correction schemes, partly because its impact is poorly understood. Here, based on analysis of an XBT-CTD side-by-side dataset and a global collocated reference dataset, the influence of RSs on the pure temperature error (PTE) is examined. Results show a clear time dependency of PTE on the RS, with maximum values occurring in the 1970s. In addition, the method used to convert thermistor resistance into temperature in the RS (using a resistance-temperature equation) has changed over time. These changes, together with the decadal changes in RSs, might contribute a small error (10% on average) to the RS dependency. Here, an improvement of global XBT bias correction that accounts for the RS dependency is proposed. However, more than 70% of historical global XBT data are missing RS-type information. We investigate several assumptions about the temporal distribution of RS types, and all scenarios lead to at least a similar to 50% reduction in the time variation of PTE compared with the uncorrected data. Therefore, the RS dependency should be taken into account in updated XBT correction schemes, which would have further implications for climatology studies.
关键词	Temperature In situ oceanic observations Instrumentation senors Bias Uncertainty Energy budget balance Data quality control Climate change
DOI	10.1175/JTECH-D-20-0136.1
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42040402] ; Key Deployment Project of Centre for Ocean Mega-Research of Science, CAS[COMS2019Q01] ; National Natural Science Foundation of China[42076202] ; Earth Systems and Climate Change Hub of the Australian Government's National Environmental Science Program
WOS研究方向	Engineering ; Meteorology & Atmospheric Sciences
WOS类目	Engineering, Ocean ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000644157500005
出版者	AMER METEOROLOGICAL SOC
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/170941
专题	中国科学院海洋研究所
通讯作者	Reseghetti, Franco; Cheng, Lijing
作者单位	1.Chinese Acad Sci, Int Ctr Climate & Environm Sci, Inst Atmospher Phys, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.ENEA, Res Ctr Santa Teresa, Lerici, Italy 4.Univ St Thomas, Sch Engn, St Paul, MN USA 5.CSIRO, Oceans & Atmosphere, Hobart, Tas, Australia 6.Chengdu Univ Informat Technol, Sch Atmospher Sci, Chengdu, Peoples R China 7.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 8.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China
通讯作者单位	中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Tan, Zhetao,Reseghetti, Franco,Abraham, John,et al. Examining the Influence of Recording System on the Pure Temperature Error in XBT Data[J]. JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY,2021,38(4):759-776.
APA	Tan, Zhetao.,Reseghetti, Franco.,Abraham, John.,Cowley, Rebecca.,Chen, Keyi.,...&Cheng, Lijing.(2021).Examining the Influence of Recording System on the Pure Temperature Error in XBT Data.JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY,38(4),759-776.
MLA	Tan, Zhetao,et al."Examining the Influence of Recording System on the Pure Temperature Error in XBT Data".JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY 38.4(2021):759-776.

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