CASPO Seminar: Shota Katsura


 
11/06/2019 - 3:30pm
Location: 
Nierenberg Hall 101
Event Description: 

Weekly CASPO Seminar: Join us in Nierenberg 101 every Wednesday at 3:30 pm to hear about the latest and greatest in Climate, Atmospheric Sciences, and Physical Oceanography

 

Dr. Shota Katsura (SIO) will present a talk titled "Halocline structure in the subarctic and eastern tropical North Pacific".

Abstract:

Salinity can be the dominant contributor to upper ocean density stratification in some oceanic regions. In these regions, strong vertical salinity gradient layers, called haloclines, shape the pycnocline and inhibit the exchange of heat, momentum, and other properties between the surface and subsurface layers. Here, we focus on the halocline structure in the subarctic North Pacific and barrier layer (BL) in the eastern tropical North Pacific, and their seasonality and formation are explored using Argo profiling float data. In the subarctic North Pacific, permanent halocline showed zonal patterns in the spatial distributions of its depth and intensity and tended to be shallow and strong in the eastern SNP but deep and weak in the west. Summer seasonal halocline showed opposite to the permanent halocline distribution and formed in the western and central SNP and coastal regions while it was seldom present in the eastern area. In the eastern tropical North Pacific, BLs were observed frequently in boreal summer and autumn along the sea surface salinity (SSS) front south of the eastern Pacific fresh pool. Temperature inversions (TIs) were found within the gap between the western and eastern Pacific warm pools in autumn when BLs were thickest. A mixed layer salinity budget revealed that Ekman advection works to both freshen and cool the eastern tropical North Pacific in autumn and contributes to the formation of the thickest BLs with the warmest TIs through the tilting of the SSS front.

 

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For more information on this event, contact: 
Alexander Andriatis
Event Calendar: 
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