Hydrothermal Heat Enhances Abyssal Mixing in the Antarctic Circumpolar Current Geophysical Research Letters
收藏NOAA Institutional Repository2023-09-12 更新2026-04-25 收录
下载链接：
https://doi.org/10.1029/2018gl080410
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资源简介：
Upwellingintheworld'sstrongestcurrent,theAntarcticCircumpolarCurrent,isthoughtto bedrivenbywindstress,surfacebuoyancyflux,andmixinggeneratedfromtheinteractionbetweenbottomcurrentsandroughtopography.However,theimpactoflocalizedinjectionofheatbyhydrothermalvents wheretheAntarcticCircumpolarCurrentinteractswithmid-oceanridgesremainspoorlyunderstood. Hereacircumpolarcompilationofheliumandphysicalmeasurementsareusedtoshowthatwhilegeothermalheatistransferredtotheoceanoverabroadareabyconduction,heattransferbyconvection dominatesnearhydrothermalvents.Buoyanthydrothermalplumesdecreasestratificationabovethevent sourceandincreasestratificationtothesouth,alteringthelocalverticaldiffusivityanddiapycnalupwellingwithin500moftheseafloorbyanorderofmagnitude.Boththeheliumtracerandstratificationsignals inducedbyhydrothermalinputareadvectedbytheflowandinfluencepropertiesdownstream.
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NOAA
创建时间：
2023-09-12
