scholarly journals Impact of Enhanced Wave-Induced Mixing on the Ocean Upper Mixed Layer during Typhoon Nepartak in a Regional Model of the Northwest Pacific Ocean

2020 ◽  
Vol 12 (17) ◽  
pp. 2808
Author(s):  
Chengcheng Yu ◽  
Yongzeng Yang ◽  
Xunqiang Yin ◽  
Meng Sun ◽  
Yongfang Shi
Keyword(s):  
Pacific Ocean ◽  
Mixed Layer ◽  
Northwest Pacific ◽  
Wave Mixing ◽  
Northwest Pacific Ocean ◽  
Wave Transport ◽  
Turbulence Mixing ◽  
The Northwest Pacific Ocean ◽  
Wave Induced ◽  
Transport Flux

To investigate the effect of wave-induced mixing on the upper ocean structure, especially under typhoon conditions, an ocean-wave coupled model is used in this study. Two physical processes, wave-induced turbulence mixing and wave transport flux residue, are introduced. We select tropical cyclone (TC) Nepartak in the Northwest Pacific ocean as a TC example. The results show that during the TC period, the wave-induced turbulence mixing effectively increases the cooling area and cooling amplitude of the sea surface temperature (SST). The wave transport flux residue plays a positive role in reproducing the distribution of the SST cooling area. From the intercomparisons among experiments, it is also found that the wave-induced turbulence mixing has an important effect on the formation of mixed layer depth (MLD). The simulated maximum MLD is increased to 54 m and is only 1 m less than the observed value. The wave transport flux residue shows a dominant role in the mixed layer temperature (MLT) changing. The mean error of the MLT is reduced by 0.19 °C compared with the control experiment without wave mixing effects. The study shows that the effect of wave mixing should be included in the upper ocean structure modeling.

scholarly journals Aerosol iron and aluminum solubility in the northwest Pacific Ocean: Results from the 2002 IOC cruise

2006 ◽  
Vol 7 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Clifton S. Buck ◽  
William M. Landing ◽  
Joseph A. Resing ◽  
Geoffrey T. Lebon
Keyword(s):  
Pacific Ocean ◽  
Northwest Pacific ◽  
Northwest Pacific Ocean ◽  
The Northwest Pacific Ocean ◽  
Aluminum Solubility

scholarly journals Analysis of Atmospheric and Ionospheric Variations Due to Impacts of Super Typhoon Mangkhut (1822) in the Northwest Pacific Ocean

2021 ◽  
Vol 13 (4) ◽  
pp. 661
Author(s):  
Mohamed Freeshah ◽  
Xiaohong Zhang ◽  
Erman Şentürk ◽  
Muhammad Arqim Adil ◽  
B. G. Mousa ◽  
...  
Keyword(s):  
Wind Speed ◽  
Pacific Ocean ◽  
Tropical Cyclone ◽  
Sea Level ◽  
Northwest Pacific ◽  
Northwest Pacific Ocean ◽  
Sea Level Pressure ◽  
Level Pressure ◽  
Super Typhoon ◽  
The Northwest Pacific Ocean

The Northwest Pacific Ocean (NWP) is one of the most vulnerable regions that has been hit by typhoons. In September 2018, Mangkhut was the 22nd Tropical Cyclone (TC) over the NWP regions (so, the event was numbered as 1822). In this paper, we investigated the highest amplitude ionospheric variations, along with the atmospheric anomalies, such as the sea-level pressure, Mangkhut’s cloud system, and the meridional and zonal wind during the typhoon. Regional Ionosphere Maps (RIMs) were created through the Hong Kong Continuously Operating Reference Stations (HKCORS) and International GNSS Service (IGS) data around the area of Mangkhut typhoon. RIMs were utilized to analyze the ionospheric Total Electron Content (TEC) response over the maximum wind speed points (maximum spots) under the meticulous observations of the solar-terrestrial environment and geomagnetic storm indices. Ionospheric vertical TEC (VTEC) time sequences over the maximum spots are detected by three methods: interquartile range method (IQR), enhanced average difference (EAD), and range of ten days (RTD) during the super typhoon Mangkhut. The research findings indicated significant ionospheric variations over the maximum spots during this powerful tropical cyclone within a few hours before the extreme wind speed. Moreover, the ionosphere showed a positive response where the maximum VTEC amplitude variations coincided with the cyclone rainbands or typhoon edges rather than the center of the storm. The sea-level pressure tends to decrease around the typhoon periphery, and the highest ionospheric VTEC amplitude was observed when the low-pressure cell covers the largest area. The possible mechanism of the ionospheric response is based on strong convective cells that create the gravity waves over tropical cyclones. Moreover, the critical change state in the meridional wind happened on the same day of maximum ionospheric variations on the 256th day of the year (DOY 256). This comprehensive analysis suggests that the meridional winds and their resulting waves may contribute in one way or another to upper atmosphere-ionosphere coupling.

scholarly journals Differences in cell viabilities of phytoplankton between spring and late summer in the northwest Pacific Ocean

2008 ◽  
Vol 360 (2) ◽  
pp. 63-70 ◽  
Author(s):  
Maki Hayakawa ◽  
Koji Suzuki ◽  
Hiroaki Saito ◽  
Kazutaka Takahashi ◽  
Shin-ichi Ito
Keyword(s):  
Pacific Ocean ◽  
Late Summer ◽  
Northwest Pacific ◽  
Northwest Pacific Ocean ◽  
The Northwest Pacific Ocean

Seasonal characteristics of organic and inorganic species and their size distributions in atmospheric aerosols over the northwest pacific ocean

1998 ◽  
Vol 32 (11) ◽  
pp. 1931-1946 ◽  
Author(s):  
Kiyoshi Matsumoto ◽  
Ippei Nagao ◽  
Hiroshi Tanaka ◽  
Hideyuki Miyaji ◽  
Takao Iida ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Atmospheric Aerosols ◽  
Northwest Pacific ◽  
Size Distributions ◽  
Northwest Pacific Ocean ◽  
Seasonal Characteristics ◽  
Inorganic Species ◽  
The Northwest Pacific Ocean
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