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AGU期刊一周Research Spotlight
AGU发布最新Editor's Highlight和国外工作学习机会(Oct 4~Oct 10, 2019)
时间:2019年10月11日 13:20来源: 点击数:

CAT Pictures of Internal Solitary Waves in Indonesian Strait

 

Huge and rapid subsurface temperature changes associated with propagating internal solitary waves were observed from a moored coastal acoustic tomography (CAT) system in Lombok Strait in Indonesia.

 

SOURCE: Geophysical Research Letters


 

Time series of temperatures in four different depth layers (see inset legend) show the rapid (hours) and large (3°-5°C) changes from three warm (labelled 2,3,5) and two cool (1,4) temperature peaks associated with the passage of internal solitary waves inferred from coastal acoustic tomography (CAT) observations in Lombok Strait, Indonesia. Credit: Syasmudin et al. [2019], Figure 4a, lower panel

 

 

Internal solitary waves are generated when strong tides interact with steep ocean bathymetry to produce rapid, deep-reaching and intense changes in the ocean temperature, along with enhanced turbulence and mixing of the water column that can influence biological productivity.

 

The relatively narrow Lombok Strait in Indonesia is a known generation area of internal solitary waves that are visible as surface slicks in remotely sensed synthetic aperture radar (SAR) images. However, the SAR snapshots provide little details about the abrupt subsurface changes associated with internal waves.

 

Syasmudin et al. [2019] observed the subsurface structure of the sequential passage of internal solitary waves in Lombok Strait for the first time using a moored coastal acoustic tomography (CAT) array. The inferred temperature changes with depth associated with the waves show alternating warm and cold peaks of 3 to 6°C appearing over periods of hours that were coherent over the upper 600 meters in the water column. While the internal waves are linked to the diurnal tidal cycle interaction with the strait sill, they are superimposed and potentially influenced by the large-scale background from the southward flowing Indonesian Throughflow in Lombok Strait.

 

Citation: Syamsudin, F., Taniguchi, N., Zhang, C., Hanifa, A. D., Li, G., Chen, M., et al. [2019]. Observing internal solitary waves in the Lombok Strait by coastal acoustic tomography. Geophysical Research Letters, 46. https://doi.org/10.1029/2019GL084595

 

—Janet Sprintall, Editor, Geophysical Research Letters

 

 AGU发布最新国外工作学习机会

1.Graduate Research Assistantships

Muskegon, Michigan

Graduate assistantships include a competitive 12-month stipend that is eligible for annual renewal.

Annis Water Resources Institute at Grand Valley State University

The Annis Water Resources Institute at Grand Valley State University has Graduate Research Assistantships available for full-time students.

https://findajob.agu.org/job/8011320/graduate-research-assistantships/

2.PhD Student

Orlando, Florida

Tuition waiver, competitive stipend, and subsidized health insurance

University of Central Florida, National Center for Integrated Coastal Research

Fully funded PhD position at University of Central Florida to work on coastal flood risk

https://findajob.agu.org/job/8011319/phd-student/

3.Postdoctoral Research Associate - Physical Oceanography

Stennis Space Center, MS

School of Ocean Science and Engineering

Advance understanding of internal gravity waves in global ocean model simulations.

https://findajob.agu.org/job/8011315/postdoctoral-research-associate-physical-oceanography/

4.Postdoctoral Scholar: Climate Data Products for Impacts Analysis and Decision Support

State College, Pennsylvania

Pennsylvania State University

https://findajob.agu.org/job/8011306/postdoctoral-scholar-climate-data-products-for-impacts-analysis-and-decision-support/

5.Princeton University Postdoctoral Research Associate: Impacts and Human Responses to Climate Change

Princeton, New Jersey (US)

Princeton University, Center for Policy Research on Energy and the Environment

https://findajob.agu.org/job/8011276/princeton-university-postdoctoral-research-associate-impacts-and-human-responses-to-climate-change/


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