Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


NASA's Hot Tower Research Confirmed Again with Tropical Storm Sandy

The eighteenth tropical depression only took six hours to strengthen into Tropical Storm Sandy, confirming NASA research that sighting of hot towers leads to intensification.

Sandy may further intensify into a hurricane and watches and warnings have been posted in the Caribbean Sea. On Oct. 23, a Hurricane Watch and Tropical Storm Warning were in effect for Jamaica, and a tropical storm watch was in effect for Haiti.

NASA's TRMM satellite flew over the developing tropical depression 18 on Oct. 21 at 8:40 p.m. EDT. This 3-D perspective showed powerful storms near the center were reaching altitudes of over 14 km (~8.7 miles). Red areas indicate heavy rainfall of 50 mm/2 inches per hour.
Credit: NASA/SSAI, Hal Pierce

A low pressure center in the southwestern Caribbean sea was upgraded to Tropical Depression 18 by the National Hurricane Center (NHC) yesterday, Oct. 22 at 1500 UTC (11:00 a.m. EDT). The Tropical Rainfall Measuring Mission satellite, otherwise known as TRMM passed directly above the newly formed tropical depression on October 22, 2012 at 1533 UTC (October 21, 2012 at 11:33 p.m. EDT). TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) data were used to determine the rainfall rates occurring within the depression and the newly formed tropical depression was already showing good organization. Some intense convective storms near the center of circulation dropping rain at a rate of about 50 mm (~2 inches) per hour.

NASA's 3-D Look at Tropical Storm Sandy

A 3-D perspective was made at NASA's Goddard Space Flight Center in Greenbelt, Md. using data from TRMM Precipitation Radar (PR) from the orbit. Powerful storms called "hot towers" located near the center of TD18's circulation were reaching altitudes of over 14 km (~8.7 miles). Towering thunderstorms like these at the center of tropical cyclones are often a sign of intensification.

A "hot tower" is a rain cloud that reaches at least to the top of the troposphere, the lowest layer of the atmosphere. The troposphere peaks around nine miles (14.5 km) high in the tropics. The towering clouds are called "hot" because they rise to such altitude due to the large amount of latent heat. Water vapor releases this latent heat as it condenses into liquid. NASA scientists Owen Kelley and John Stout of George Mason University and NASA's Goddard Space Flight Center, Greenbelt, Md., found that a tropical cyclone with a hot tower around its center of circulation was twice as likely to intensify within the next six hours, than a cyclone that lacked a tower. That's exactly what happened on Oct. 22, when TRMM spotted hot towers in Tropical Depression 18. It became Tropical Storm Sandy just six hours later.

Sandy's Stats on Oct. 23

On Oct. 23 at 8 a.m. EDT (1200 UTC), Tropical Storm Sandy's maximum sustained winds were near 45 mph (75 kph) and the National Hurricane Center expects the storm to strengthen over the next two days. The center of Tropical Storm Sandy was located near latitude 13.4 north and longitude 77.9 west, about 325 miles (525 km) south-southwest of Kingston, Jamaica. Sandy was moving to the north-northeast near 3 mph (6 kph) and is expected to continue in that direction for the next two days taking the center of the tropical storm near or over Jamaica on Wed. Oct. 24. Sandy's estimated minimum central pressure is 997 millibars.

NASA Infrared Data on Sandy

Infrared satellite imagery captured on Oct. 23 at 0617 UTC (2:17 a.m. EDT) from the Atmospheric Infrared Sounder instrument aboard NASA's Aqua satellite showed that there are bands of strong thunderstorms east of Sandy's center of circulation . Those bands of thunderstorms are reaching high into the troposphere where cloud top temperatures are as cold as -63 Fahrenheit (-52 Celsius).

Sandy's Wind, Rain, Storm Surge

Tropical storm winds are expected to reach Jamaica during the night-time hours of Oct. 23 or early morning hours on Wed. Oct. 24. The National Hurricane Center noted that "hurricane conditions expected on Wed. Hurricane conditions are also possible in eastern Cuba by Wed. night. Tropical storm conditions are possible in Haiti on Oct. 24, and in central and southeastern Bahamas on Thurs. Oct. 24.

Sandy is expected to be a big rainmaker, generating between six and 12 inches across Jamaica, Haiti , the Domenican Republic and eastern Cuba. Isolated rainfall totals could reach 20 inches. In addition, storm surges are expect to raise water levels between one and three feet above normal tide levels.

The National Hurricane Center expects Sandy to strengthen into a hurricane over the next couple of days.

Text credit: Rob Gutro
NASA's Goddard Space Flight Center, Greenbelt, Md.

Rob Gutro | EurekAlert!
Further information:

More articles from Earth Sciences:

nachricht Receding glaciers in Bolivia leave communities at risk
20.10.2016 | European Geosciences Union

nachricht UM researchers study vast carbon residue of ocean life
19.10.2016 | University of Miami Rosenstiel School of Marine & Atmospheric Science

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Resolving the mystery of preeclampsia

21.10.2016 | Health and Medicine

Stanford researchers create new special-purpose computer that may someday save us billions

21.10.2016 | Information Technology

From ancient fossils to future cars

21.10.2016 | Materials Sciences

More VideoLinks >>>