文献类型：期刊文献

英文题名：Transport of Pacific Water Into the Canada Basin and the Formation of the Chukchi Slope Current

作者：Spall, Michael A.[1];Pickart, Robert S.[1];Li, Min[1,2,3,4];Itoh, Motoyo[5];Lin, Peigen[1];Kikuchi, Takashi[5];Qi, Yiquan[6]

机构：[1]Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA;[2]Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China;[3]Guangdong Ocean Univ, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang, Peoples R China;[4]Univ Chinese Acad Sci, Beijing, Peoples R China;[5]Japan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa, Japan;[6]Hohai Univ, Coll Oceanog, Nanjing, Jiangsu, Peoples R China

年份：2018

卷号：123

期号：10

起止页码：7453

外文期刊名：JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS

收录：SCI-EXPANDED(收录号：WOS:000451274900028)、、Scopus(收录号：2-s2.0-85055279340)、WOS

基金：This study was supported by the National Science Foundation under grants PLR-1415489 and OCE-1533170 (M. A. S.), the Bureau of Ocean and Energy Management under contract M12AC00008 (R. S. P. and M. L.), the National Natural Science Foundation of China (grant 41506018) and the Project of Enhancing School with Innovation of Guangdong University (M. L.), and the National Oceanic and Atmospheric Administration grant NA16OAR4310248 (P. L.). The Barrow Canyon mooring works were supported by JAMSTEC Arctic Research and Japan's research project, Arctic Challenge for Sustainability (ArCS), which was funded by the Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT). The authors would like to thank two anonymous reviewers for their helpful comments and suggestions for improving this manuscript. Data from the Beaufort slope array are available at http://aon.whoi.edu.The Chukchi slope mooring data are available through the Bureau of Ocean and Energy Management (https://www.boem.gov).The Chukchi slope hydrographic and shipboard ADCP data are available through http://hdl.handle.net/1912/8170.The Barrow Canyon mooring data can be found at http://www.jamstec.go.jp/arctic/data_archive_work/mooring/mooring_index.html.The Bering Strait mooring data are available at http://psc.apl.washington.edu/HLD/Bstrait/Data/BeringStraitMooringDataArchive.html.The numerical model input parameters, forcing fields, and configuration are available at the NSF Arctic Data Center, https://arcticdata.io/catalog/\#view/doi: 10.18739/A21C4S.

语种：英文

外文关键词：Canada Basin; halocline; ventilation; Chukchi Sea

外文摘要：Plain Language Summary A high-resolution regional ocean model together with moored hydrographic and velocity measurements is used to identify the pathways and mechanisms by which Pacific water, modified over the Chukchi shelf, crosses the shelf break into the Canada Basin. Most of the Pacific water flowing into the Arctic Ocean through Bering Strait enters the Canada Basin through Barrow Canyon. Strong advection allows the water to cross the shelf break and exit the shelf. Wind forcing plays little role in this process. Some of the outflowing water from Barrow Canyon flows to the east into the Beaufort Sea; however, approximately 0.4 to 0.5Sv turns to the west forming the newly identified Chukchi Slope Current. This transport occurs at all times of year, channeling both summer and winter waters from the shelf to the Canada Basin. The model indicates that approximately 75% of this water was exposed to the mixed layer within the Chukchi Sea, while the remaining 25% was able to cross the shelf during the stratified summer before convection commences in late fall. We view the O(0.5)Sv of the Chukchi Slope Current as replacing Beaufort Gyre water that would have come from the east in the absence of the cross-topography flow in Barrow Canyon. The weak eastward flow on the Beaufort slope is also consistent with the local disruption of the Beaufort Gyre by the Barrow Canyon outflow. Using a combination of numerical models and field observations, we elucidate where and when waters of Pacific Ocean origin cross the shelf break and enter the interior of the Canada Basin. Most of these waters flow toward the west, forming the recently observed Chukchi Slope Current.