日本語
 
Help Privacy Policy ポリシー/免責事項
  詳細検索ブラウズ

アイテム詳細


公開

学術論文

Sensitivity of Global Upper-Ocean Heat Content Estimates to Mapping Methods, XBT Bias Corrections, and Baseline Climatologies

MPS-Authors
There are no MPG-Authors in the publication available
External Resource
There are no locators available
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
フルテキスト (公開)
公開されているフルテキストはありません
付随資料 (公開)
There is no public supplementary material available
引用

Boyer, T., Domingues, C. M., Good, S. A., Johnson, G. C., Lyman, J. M., Ishii, M., Gouretski, V., Willis, J. K., Antonov, J., Wijffels, S., Church, J. A., Cowley, R., & Bindoff, N. L. (2016). Sensitivity of Global Upper-Ocean Heat Content Estimates to Mapping Methods, XBT Bias Corrections, and Baseline Climatologies. Journal of Climate, 29, 4817-4842. doi:10.1175/JCLI-D-15-0801.1.


引用: https://hdl.handle.net/11858/00-001M-0000-002D-CDB8-5
要旨
Ocean warming accounts for the majority of the earth's recent energy imbalance. Historic ocean heat content (OHC) changes are important for understanding changing climate. Calculations of OHC anomalies (OHCA) from in situ measurements provide estimates of these changes. Uncertainties in OHCA estimates arise from calculating global fields from temporally and spatially irregular data (mapping method), instrument bias corrections, and the definitions of a baseline climatology from which anomalies are calculated. To investigate sensitivity of OHCA estimates for the upper 700 m to these different factors, the same quality-controlled dataset is used by seven groups and comparisons are made. Two time periods (1970-2008 and 1993-2008) are examined. Uncertainty due to the mapping method is 16.5 ZJ for 1970-2008 and 17.1 ZJ for 1993-2008 (1 ZJ = 1 x 10(21) J). Uncertainty due to instrument bias correction varied from 8.0 to 17.9 ZJ for 1970-2008 and from 10.9 to 22.4 ZJ for 1993-2008, depending on mapping method. Uncertainty due to baseline mean varied from 3.5 to 14.5 ZJ for 1970-2008 and from 2.7 to 9.8 ZJ for 1993-2008, depending on mapping method and offsets. On average mapping method is the largest source of uncertainty. The linear trend varied from 1.3 to 5.0 ZJ yr(-1) (0.08-0.31 Wm(-2)) for 1970-2008 and from 1.5 to 9.4 ZJ yr(-1) (0.09-0.58 Wm(-2)) for 1993-2008, depending on method, instrument bias correction, and baseline mean. Despite these complications, a statistically robust upper-ocean warming was found in all cases for the full time period.