A "hot tower" is a rain cloud that reaches at least to the top of the troposphere, the lowest layer of the atmosphere. It extends approximately nine miles (14.5 km) high in the tropics. These towers are called "hot" because they rise to such altitude due to the large amount of latent heat.
When NASA's TRMM satellite passed over TD02E on May 21, 2012, at 08:50 UTC (4:50 a.m. EDT), data revealed a hot tower over 15 kilometers (9.3 miles) high. TRMM also measured rainfall within the tropical depression, and found that isolated areas of heavy rain (falling at a rate of 2 inches/50 mm per hour (appearing in red)) were seen in the northwestern quadrant of the storm. Light to moderate rainfall was falling at a rate between .78 inches and 1.57 inches per hour (20 to 40 mm).
Credit: NASA/TRMM, Hal Pierce
Water vapor releases this latent heat as it condenses into liquid. NASA scientists, using data from the Tropical Rainfall Measuring Mission (TRMM) satellite, found that a tropical cyclone with a hot tower in its eyewall was twice as likely to intensify within the next six hours, than a cyclone that lacked a tower. The "eyewall" is the ring of clouds around a cyclone's central eye.
When NASA's TRMM satellite passed over TD02E on May 21, 2012 at 08:50 UTC (4:50 a.m. EDT), data revealed a hot tower over 15 kilometers (9.3 miles) high. That's an indication that the storm is going to intensify, and that's one factor that forecasters at the National Hurricane Center are using in their forecast, which calls for TD02E to become a tropical storm later in the day on May 21.
TRMM also measured rainfall within the tropical depression, and found that isolated areas of heavy rain (falling at a rate of 2 inches/50 mm per hour) were seen in the northwestern quadrant of the storm. Light-to-moderate rainfall was falling throughout the rest of the storm.
At 5 a.m. EDT on May 21, TD02E had maximum sustained winds near 35 mph. It was centered about 520 miles (835 km) south of Acapulco, Mexico, near 9.4 North and 100.1 West. It was moving to the west near 6 mph (9 kph) and had a minimum central pressure of 1005 millibars.
The forecasters at the National Hurricane center predict TD 02E will turn to the west-northwest and northwest, while speeding up. TD02E is also expected to strengthen into a tropical storm, and into a hurricane later in the week. Residents of west central Mexico should monitor the progress of this storm.
Rob Gutro | EurekAlert!
Atmospheric scientists reveal the effect of sea-ice loss on Arctic warming
11.03.2019 | Institute of Atmospheric Physics, Chinese Academy of Sciences
11.03.2019 | University of Tokyo
Nano- and microtechnology are promising candidates not only for medical applications such as drug delivery but also for the creation of little robots or flexible integrated sensors. Scientists from the Max Planck Institute for Polymer Research (MPI-P) have created magnetic microparticles, with a newly developed method, that could pave the way for building micro-motors or guiding drugs in the human body to a target, like a tumor. The preparation of such structures as well as their remote-control can be regulated using magnetic fields and therefore can find application in an array of domains.
The magnetic properties of a material control how this material responds to the presence of a magnetic field. Iron oxide is the main component of rust but also...
Due to the special arrangement of its molecules, a new coating made of corn starch is able to repair small scratches by itself through heat: The cross-linking via ring-shaped molecules makes the material mobile, so that it compensates for the scratches and these disappear again.
Superficial micro-scratches on the car body or on other high-gloss surfaces are harmless, but annoying. Especially in the luxury segment such surfaces are...
The Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in Arizona released its first image of the surface magnetic field of another star. In a paper in the European journal Astronomy & Astrophysics, the PEPSI team presents a Zeeman- Doppler-Image of the surface of the magnetically active star II Pegasi.
A special technique allows astronomers to resolve the surfaces of faraway stars. Those are otherwise only seen as point sources, even in the largest telescopes...
Researchers at Chalmers University of Technology and the University of Gothenburg, Sweden, have proposed a way to create a completely new source of radiation. Ultra-intense light pulses consist of the motion of a single wave and can be described as a tsunami of light. The strong wave can be used to study interactions between matter and light in a unique way. Their research is now published in the scientific journal Physical Review Letters.
"This source of radiation lets us look at reality through a new angle - it is like twisting a mirror and discovering something completely different," says...
New research group at the University of Jena combines theory and experiment to demonstrate for the first time certain physical processes in a quantum vacuum
For most people, a vacuum is an empty space. Quantum physics, on the other hand, assumes that even in this lowest-energy state, particles and antiparticles...
11.03.2019 | Event News
01.03.2019 | Event News
28.02.2019 | Event News
21.03.2019 | Life Sciences
21.03.2019 | Physics and Astronomy
21.03.2019 | HANNOVER MESSE