The Atmospheric Infrared Sounder (AIRS) instrument that flies aboard NASA's Aqua satellite captured an infrared image of Cyclone Sandra's cloud top temperatures on March 8 at 1717 UTC (12:17 p.m. EST). Strong thunderstorms around Sandra's center and in a band east of the center appeared as cold as -63 Fahrenheit (-52 Celsius), and are indicative of heavy rainfall.
This infrared image of Cyclone Sandra was captured by the AIRS instrument that flies aboard NASA's Aqua satellite on March 8 at 1447 UTC (9:17 a.m. EST). Sandy's center and a band of thunderstorms east of center have strong (purple) thunderstorms dropping heavy rainfall. Credit: NASA JPL, Ed Olsen
As cloud tops grow taller in the troposphere, their temperatures grow colder (because temperatures drop with altitude in the troposphere). High cloud tops indicate a strong uplift of air that helps build the thunderstorms that make up a tropical cyclone. When uplift is strong, cloud tops sometimes punch through the top of the troposphere into the tropopause and even into the stratosphere.
Satellite imagery also showed central convection deepened (strengthened) over the storm's center since the previous day, indicating that Sandra is in a mode of strengthening.
Data from the Special Sensor Microwave Imager/Sounder (SSMIS) satellite instrument indicated an eye feature developing in Sandra early on March 8. Data from the SSMI is collected under the Defense Meteorological Satellite Program, which is a Department of Defense program responsible for designing, building, launching, and operating polar-orbiting environmental satellites.
On March 8 at 1200 UTC (7 a.m. EST/U.S.), Sandra's center was near 14.9 degrees south latitude and 157.7 degrees east longitude. The center of Cyclone Sandra was 645 nautical miles (742.3 miles/1,195 km) northwest of Noumea, New Caledonia. Sandra is moving to the east at 6 knots (7 mph/11.1 kph) and Sandra's maximum sustained winds had increased to near 60 knots (69 mph/111.1 kph).
Forecasters at the Joint Typhoon Warning Center noted on their update on March 8 that all environmental factors indicate that Sandra will continue to intensify over the next three days before weakening. Sandra is expected to pass west of New Caledonia on March 12, and bring heavy rain, possible flooding, strong winds and rough surf.
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
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
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...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
12.12.2017 | Physics and Astronomy
12.12.2017 | Earth Sciences
12.12.2017 | Power and Electrical Engineering