NASA's QuikScat satellite uses microwave technology to peer through a tropical cyclone's clouds, and actually read the speed of the rotating surface winds. In an overpass from space at 7:58 p.m. ET last night, November 18 (Nov. 19 at 0058 UTC), QuikScat noticed Anja's maximum sustained winds have dropped to 63 mph, making it a tropical storm.
Around that time, Anja's center was 560 miles east of Port Louis, Mauritius, near 22.4 degrees South latitude and 68.1 East longitude. Anja was moving south-southeast at 23 mph (20 knots). Anja is staying at sea and away from any landmasses, and poses no threat before it is expected to dissipate by the weekend.
Satellite imagery from NASA's Aqua satellite has helped forecasters determine where Anja's center is located, and how it has changed shape. Animated infrared imagery, such as that from NASA's Atmospheric Infrared Sounder (AIRS) instrument showed the system has become sheared and elongated toward the southeast. Another instrument on NASA's Aqua satellite, the Advanced Microwave Sounding Unit-B (AMSU-B), helped determine Anja's position using microwave technology when it flew overhead.
As Anja continues to weaken, its tropical storm-force winds don't have the extent they had yesterday. Today, November 18, tropical storm-force winds of 37 mph or higher extends out to 105 miles from Anja's center.
In addition to the wind shear that has been weakening Anja, sea surface temperatures are also decreasing as Anja continues to move toward the southeast. Sea surface temperatures are now below 26 degrees Celsius (78 degrees Fahrenheit) and are cooler farther southeast. To maintain intensity, tropical cyclones need sea surface temperatures of at least 80 degrees Fahrenheit.
Anja has now begun to speed up and is making a transition into an extra-tropical storm.
Rob Gutro | EurekAlert!
Multi-year submarine-canyon study challenges textbook theories about turbidity currents
12.12.2017 | Monterey Bay Aquarium Research Institute
How do megacities impact coastal seas? Searching for evidence in Chinese marginal seas
11.12.2017 | Leibniz-Institut für Ostseeforschung Warnemünde
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications
Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
12.12.2017 | Earth Sciences
12.12.2017 | Power and Electrical Engineering
12.12.2017 | Life Sciences