Tropical Depression 11S (TD 11S) had maximum sustained winds near 34 mph (30 knots) on January 29 at 09:00 UTC (4 a.m. ET). It was located about 320 nautical miles southeast of La Reunion Island, near 25.5 South and 59.8 East. It was moving southeast near 11 mph (10 knots).
The TRMM satellite, managed by both NASA and JAXA, took a look at the rainfall happening within TD 11S and noticed some shallower convection (showers and thunderstorms) continues to wrap into the storm's low-level center from the southwest quadrant of the storm. Despite the convection, TD11S's center is now fully exposed from the west which means that drier air or wind shear can enter into the storm and weaken it.
Another factor affecting the storm is an upper-level low, which is northwest of the 11S's center. That upper-level low is actually suppressing more convection in TD11S.
NASA's Aqua satellite passed over TD 11S and the Advanced Microwave Sounding Unit (AMSU-A) instrument aboard it measured the temperatures within TD 11S. AMSU-A a 15-channel microwave sounder designed primarily to obtain temperature profiles in the upper atmosphere (especially the stratosphere) and to provide a cloud-filtering capability for tropospheric temperature observations.
On January 28 at 1400 UTC (9:00 a.m. ET) AMSU-A showed that the lower-level center of the storm has a warm core center and that a cold core has developed aloft, which indicates that TD 11S may have already become more subtropical in nature.
A conversion to "extratropical" status means that the storm eventually loses its warm core and becomes a cold-core system. During the time it is becoming extratropical the cyclone's primary energy source changes from the release of latent heat from condensation (from thunderstorms near the storm's center) to baroclinic (temperature and air pressure) processes. When a cyclone becomes extratropical it will usually connect with nearby fronts and or troughs (extended areas of low pressure) consistent with a baroclinic (pressure) system. When that happens it appears the system grows larger while the core weakens.
TD11S isn't threatening any land areas, and is forecast to complete its transition to an extra-tropical storm over the weekend.
Rob Gutro | EurekAlert!
Radioactivity from oil and gas wastewater persists in Pennsylvania stream sediments
22.01.2018 | Duke University
World’s oldest known oxygen oasis discovered
18.01.2018 | Eberhard Karls Universität Tübingen
On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.
We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...
What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...
For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.
Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...
At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.
No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...
Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.
Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...
08.01.2018 | Event News
11.12.2017 | Event News
08.12.2017 | Event News
22.01.2018 | Materials Sciences
22.01.2018 | Earth Sciences
22.01.2018 | Life Sciences