Image: Oceanic nonlinear internal solitary waves from the Lombok Strait

December 8, 2016, NASA
Credit: Jeff Schmaltz, MODIS Land Rapid Response Team, NASA GSFC

On November 1, 2016, NASA's Aqua satellite passed over Indonesia, allowing the Moderate Resolution Imaging Spectroradiometer (MODIS) on board to capture a stunning true-color image of oceanic nonlinear internal solitary waves from the Lombok Strait.

A bank of clouds covers East Java along the western edge of the image, with a bright sun overhead casting shadows from the clouds along the ocean surface. Away from the clouds, the appears a bright silver due to "sunglint," an optical effect caused by the mirror-like reflection of sunlight off the water surface directly back at the satellite sensor. Although sunglint washes out many features, it also reveals details about the that are usually hidden from view. In this case, sunglint exposes the waves created by the movement of currents in the ocean water.

Internal waves are generated when the interface between layers is disturbed, such as when passes over rough ocean floors, ridges, or other obstacles. The Lombok Strait, which is a relatively narrow passageway between Bali (west) and Lombok (east), allows flow of water from the Pacific Ocean into the Indian Ocean. The bottom of the strait is complex and rough, consisting of two main channels, one shallow and one deep. Because of the variation in water movement due to the complexity of the channels and ocean interface, the tides in the strait have a complex rhythm but tend to combine about every 14 days to create an exceptionally strong tidal flow. It is the combination of rough topography, strong tidal currents, and stratified water from the exchange that makes the Lombok Strait famous for generation of intensive .

Explore further: How to monitor global ocean warming—without harming whales

Related Stories

How to monitor global ocean warming—without harming whales

November 21, 2016

Most of the extra heat trapped by human-generated emissions is ending up in the oceans. But tracking the temperature of the world's oceans to monitor the change is trickier than it might seem. While satellites monitor surface ...

Scientists track monster waves below the ocean surface

July 21, 2015

A scientific research team spent seven years tracking the movements of skyscraper-high waves in the South China Sea. University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science scientists were part of the ...

The ocean's hidden waves show their power

January 8, 2014

Their effect on the surface of the ocean is negligible, producing a rise of just inches that is virtually imperceptible on a turbulent sea. But internal waves, which are hidden entirely within the ocean, can tower hundreds ...

Image: Morning sunglint over the Pacific

April 25, 2016

This Earth observation composite image from the International Space Station captures morning sunglint and low clouds over the central Pacific Ocean.

Recommended for you

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.