GSTDTAP  > 气候变化
DOI10.1029/2021GL094322
Decreased Stratification in the Abyssal Southwest Pacific Basin and Implications for the Energy Budget.
Helen. J. Zhang; Caitlin. B. Whalen; Nirnimesh Kumar; Sarah. G. Purkey
2021-08-25
发表期刊Geophysical Research Letters
出版年2021
英文摘要

As the abyssal oceans warm, stratification is also expected to change in response. This change may impact mixing and vertical transport by altering the buoyancy flux, internal wave generation, and turbulent dissipation. In this study, repeated surveys of three hydrographic sections in the Southwest Pacific Basin between the 1990s-2010s are used to estimate the change in buoyancy frequency urn:x-wiley:00948276:media:grl62920:grl62920-math-0001. We find that below the urn:x-wiley:00948276:media:grl62920:grl62920-math-0002 °C isotherm, urn:x-wiley:00948276:media:grl62920:grl62920-math-0003 is on average reduced by a scaling factor of urn:x-wiley:00948276:media:grl62920:grl62920-math-0004, a 12% reduction, per decade that intensifies with depth. At urn:x-wiley:00948276:media:grl62920:grl62920-math-0005°C, we observe the biggest change: urn:x-wiley:00948276:media:grl62920:grl62920-math-0006, or a 29% reduction per decade. Within the same period, the magnitude of vertical diffusive heat flux is also reduced by about urn:x-wiley:00948276:media:grl62920:grl62920-math-0007, although this estimate is sensitive to the choice of estimated diffusivity. Finally, implications of these results for the heat budget and global ocean circulation are qualitatively discussed.

领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/336674
专题气候变化
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Helen. J. Zhang,Caitlin. B. Whalen,Nirnimesh Kumar,et al. Decreased Stratification in the Abyssal Southwest Pacific Basin and Implications for the Energy Budget.[J]. Geophysical Research Letters,2021.
APA Helen. J. Zhang,Caitlin. B. Whalen,Nirnimesh Kumar,&Sarah. G. Purkey.(2021).Decreased Stratification in the Abyssal Southwest Pacific Basin and Implications for the Energy Budget..Geophysical Research Letters.
MLA Helen. J. Zhang,et al."Decreased Stratification in the Abyssal Southwest Pacific Basin and Implications for the Energy Budget.".Geophysical Research Letters (2021).
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