气候变化领域集成服务门户(CCPortal): Observation of Bottom-Trapped Topographic Rossby Waves on the Shelf Break of the Chukchi Sea

CCPortal

DOI	10.1029/2019JC015436
	Observation of Bottom-Trapped Topographic Rossby Waves on the Shelf Break of the Chukchi Sea
	Ku A.; Seung Y.H.; Jeon C.; Choi Y.; Yoshizawa E.; Shimada K.; Cho K.-H.; Park J.-H.
发表日期	2020
ISSN	21699275
卷号	125 期号:7
英文摘要	This study investigates topographic Rossby waves (TRWs) with a period of approximately 35 hr using a mooring observation at 194-m depth on the shelf break of the Chukchi Sea in the Arctic Ocean. We measured velocity, temperature, and salinity for about 1 year from August 2014 to August 2015. The observations reveal that the bottom-intensified upslope current fluctuations were significantly coherent with near-bottom temperature fluctuations, with a phase lag of approximately 90°. Near the seafloor, the temperature increased with depth. Therefore, the temperature increases (decreases) with the upslope (downslope) currents. Theoretical estimates of the wavelength, angle of wavenumber vector, and bottom-trapping depth confirmed that the observed near 35-hr TRWs are indeed plausible in the study area. Energetic TRWs were observed in September and October, during the sea ice free season, whereas weak TRWs were observed in months with sea ice cover. The TRW events coincided with local wind-stress events, suggesting that the TRWs were triggered by atmospheric forcing. These findings imply that a longer ice-free season may allow for a more frequent occurrence of energetic TRWs, which may enhance the water exchange between the shallow continental shelf and the deep ocean. ©2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186805
作者单位	Department of Marine Science and Biological Engineering, Inha University, Incheon, South Korea; GeoSystem Research Corporation, Gunpo, South Korea; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; Korea Polar Research Institute, Incheon, South Korea; Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, Japan; Department of Ocean Sciences, Inha University, Incheon, South Korea
推荐引用方式 GB/T 7714	Ku A.,Seung Y.H.,Jeon C.,et al. Observation of Bottom-Trapped Topographic Rossby Waves on the Shelf Break of the Chukchi Sea[J],2020,125(7).
APA	Ku A..,Seung Y.H..,Jeon C..,Choi Y..,Yoshizawa E..,...&Park J.-H..(2020).Observation of Bottom-Trapped Topographic Rossby Waves on the Shelf Break of the Chukchi Sea.Journal of Geophysical Research: Oceans,125(7).
MLA	Ku A.,et al."Observation of Bottom-Trapped Topographic Rossby Waves on the Shelf Break of the Chukchi Sea".Journal of Geophysical Research: Oceans 125.7(2020).