Preprints
https://doi.org/10.5194/essd-2024-42
https://doi.org/10.5194/essd-2024-42
14 Feb 2024
 | 14 Feb 2024
Status: this preprint is currently under review for the journal ESSD.

IAPv4 ocean temperature and ocean heat content gridded dataset

Lijing Cheng, Yuying Pan, Zhetao Tan, Huayi Zheng, Yujing Zhu, Wangxu Wei, Juan Du, Huifeng Yuan, Guancheng Li, Hanlin Ye, Viktor Gouretski, Yuanlong Li, Kevin Trenberth, John Abraham, Yuchun Jin, Franco Reseghetti, Xiaopei Lin, Bing Zhang, Gengxin Chen, Michael Mann, and Jiang Zhu

Abstract. Ocean observational gridded products are vital for climate monitoring, ocean and climate research, model evaluation, and supporting climate mitigation and adaptation measures. This paper describes the 4th version of the Institute of Atmospheric Physics (IAPv4) ocean temperature and ocean heat content (OHC) objective analysis product. It accounts for recent developments in quality control (QC) procedures, climatology, bias correction, vertical and horizontal interpolation, and mapping and is available for the upper 6000 m (119 levels) since 1940 (more reliable after ~1957) for monthly and 1° × 1° temporal and spatial resolutions. The IAPv4 is compared with the previous version, IAPv3, and to the other data products, sea surface temperatures (SSTs), and satellite observations. It has a slightly stronger long-term upper 2000 m OHC increase than IAPv3 for 1955–2023, mainly because of newly developed bias corrections. IAPv4 OHC 0–2000 m trend is also higher during 2005–2023 than IAPv3. The first level of IAPv4 is consistent with independent SST datasets. The month-to-month OHC variability for IAPv4 is desirably less than IAPv3 and other OHC products investigated in this study; annual variations are consistent with the net energy imbalance at the top of the atmosphere, and the sea level budget can be closed within uncertainty. The gridded product is freely accessible at: http://dx.doi.org/10.12157/IOCAS.20240117.002 for temperature data (Cheng et al., 2024a) and http://dx.doi.org/10.12157/IOCAS.20240117.001 for ocean heat content data (Cheng et al., 2024b).

Lijing Cheng, Yuying Pan, Zhetao Tan, Huayi Zheng, Yujing Zhu, Wangxu Wei, Juan Du, Huifeng Yuan, Guancheng Li, Hanlin Ye, Viktor Gouretski, Yuanlong Li, Kevin Trenberth, John Abraham, Yuchun Jin, Franco Reseghetti, Xiaopei Lin, Bing Zhang, Gengxin Chen, Michael Mann, and Jiang Zhu

Status: open (until 27 Apr 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on essd-2024-42', Trevor McDougall, 20 Feb 2024 reply
    • AC1: 'Reply on CC1', Lijing Cheng, 20 Feb 2024 reply
  • RC1: 'Comment on essd-2024-42', Anonymous Referee #1, 28 Mar 2024 reply
Lijing Cheng, Yuying Pan, Zhetao Tan, Huayi Zheng, Yujing Zhu, Wangxu Wei, Juan Du, Huifeng Yuan, Guancheng Li, Hanlin Ye, Viktor Gouretski, Yuanlong Li, Kevin Trenberth, John Abraham, Yuchun Jin, Franco Reseghetti, Xiaopei Lin, Bing Zhang, Gengxin Chen, Michael Mann, and Jiang Zhu

Data sets

IAPv4 ocean temperature gridded dataset Lijing Cheng, Zhetao Tan, Yuying Pan, Huayi Zheng, Yujing Zhu, Wangxu Wei, Juan Du, Guancheng Li, Hanlin Ye, and Viktor Gourteski http://dx.doi.org/10.12157/IOCAS.20240117.002

IAPv4 ocean heat content gridded dataset Lijing Cheng, Zhetao Tan, Yuying Pan, Huayi Zheng, Yujing Zhu, Wangxu Wei, Juan Du, Guancheng Li, Hanlin Ye, and Viktor Gourteski http://dx.doi.org/10.12157/IOCAS.20240117.001

Model code and software

IAP ocean data bias correction techniques (XBT, MBT, APB, Bottle) Lijing Cheng http://www.ocean.iap.ac.cn/pages/dataService/dataService.html?navAnchor=dataService

Lijing Cheng, Yuying Pan, Zhetao Tan, Huayi Zheng, Yujing Zhu, Wangxu Wei, Juan Du, Huifeng Yuan, Guancheng Li, Hanlin Ye, Viktor Gouretski, Yuanlong Li, Kevin Trenberth, John Abraham, Yuchun Jin, Franco Reseghetti, Xiaopei Lin, Bing Zhang, Gengxin Chen, Michael Mann, and Jiang Zhu

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Short summary
Observational gridded products are essential for understanding the ocean, the atmosphere, and climate change; they support policy decisions and social-economy developments. This study provides an update on the ocean subsurface temperature and ocean heat content gridded product, named IAPv4 data product, which has been available for the upper 6000 m (119 levels) since 1940 (more reliable after ~1957) for monthly and 1° × 1° temporal and spatial resolutions.
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