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    Variations of the global net air–sea heat flux during the “hiatus” period (2001–10)

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    jcli-d-15-0626%2E1.pdf (4.826Mb)
    Date
    2016-05-15
    Author
    Liang, Xinfeng  Concept link
    Yu, Lisan  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/8066
    As published
    https://doi.org/10.1175/JCLI-D-15-0626.1
    DOI
    10.1175/JCLI-D-15-0626.1
    Keyword
     Physical Meteorology and Climatology; Heat budgets/fluxes; Surface fluxes; Models and modeling; Reanalysis data; Variability; Climate variability; Interannual variability; Seasonal variability 
    Abstract
    An assessment is made of the mean and variability of the net air–sea heat flux, Qnet, from four products (ECCO, OAFlux–CERES, ERA-Interim, and NCEP1) over the global ice-free ocean from January 2001 to December 2010. For the 10-yr “hiatus” period, all products agree on an overall net heat gain over the global ice-free ocean, but the magnitude varies from 1.7 to 9.5 W m−2. The differences among products are particularly large in the Southern Ocean, where they cannot even agree on whether the region gains or loses heat on the annual mean basis. Decadal trends of Qnet differ significantly between products. ECCO and OAFlux–CERES show almost no trend, whereas ERA-Interim suggests a downward trend and NCEP1 shows an upward trend. Therefore, numerical simulations utilizing different surface flux forcing products will likely produce diverged trends of the ocean heat content during this period. The downward trend in ERA-Interim started from 2006, driven by a peculiar pattern change in the tropical regions. ECCO, which used ERA-Interim as initial surface forcings and is constrained by ocean dynamics and ocean observations, corrected the pattern. Among the four products, ECCO and OAFlux–CERES show great similarities in the examined spatial and temporal patterns. Given that the two estimates were obtained using different approaches and based on largely independent observations, these similarities are encouraging and instructive. It is more likely that the global net air–sea heat flux does not change much during the so-called hiatus period.
    Description
    Author Posting. © American Meteorological Society, 2016. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 29 (2016): 3647-3660, doi:10.1175/JCLI-D-15-0626.1.
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    • Physical Oceanography (PO)
    Suggested Citation
    Article: Liang, Xinfeng, Yu, Lisan, "Variations of the global net air–sea heat flux during the “hiatus” period (2001–10)", Journal of Climate 29 (2016): 3647-3660, DOI:10.1175/JCLI-D-15-0626.1, https://hdl.handle.net/1912/8066
     

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