Featured Research

from universities, journals, and other organizations

NASA's TRMM satellite sees the power in Tropical Storm Alenga

Date:
December 7, 2011
Source:
NASA/Goddard Space Flight Center
Summary:
The first tropical storm of the Southern Indian Ocean season has been renamed from Tropical Storm 01S to Tropical Storm Alenga as it continues to strengthen. NASA's TRMM satellite was able to capture a look at the rainfall rates and cloud heights within Alenga recently.

TRMM's Precipitation Radar (PR) data is depicted in a 3-D image that revealed a few powerful storms near the storm's center were pushing up to heights of over 12 km (~7.45 miles). The release of energy within these tall towers are often a sign that a storm is intensifying.
Credit: NASA/SSAI, Hal Pierce

The first tropical storm of the Southern Indian Ocean season has been renamed from Tropical Storm 01S to Tropical Storm Alenga as it continues to strengthen. NASA's TRMM satellite was able to capture a look at the rainfall rates and cloud heights within Alenga recently.

On December 4, 2011 at 1210 UTC (7:10 a.m. EST) the Tropical Rainfall Measuring Mission (TRMM) satellite had a look at the first tropical storm forming in the Indian Ocean this season. Tropical cyclones normally form in this area between November 15 and April 30 so this one was a little overdue.

The TRMM satellite is managed by both NASA and the Japanese Space Agency, and obtains rainfall measurements in the tropics. TRMM provided a "top down" rainfall analysis of Tropical Storm Alenga on Dec. 4 at 12:10 UTC (7:10 a.m. EST) using the TRMM Microwave Imager (TMI) and Precipitation Radar (PR) overlaid on an enhanced infrared image from Visible and InfraRed Scanner (VIRS) data. This analysis was done at NASA's Goddard Space Flight Center in Greenbelt, Md. and showed that very heavy rainfall of over 50 mm (~2 inches) per hour was occurring in the forming tropical cyclone near the center of its circulation.

Hal Pierce of NASA's TRMM Team at NASA Goddard made the December 4 images from TRMM Data. Pierce said, "TRMM's Precipitation Radar (PR) data is depicted in a 3-D image that revealed a few powerful storms near the storm's center were pushing up to heights of over 12 km (~7.45 miles). The release of energy within these tall towers are often a sign that a storm is intensifying."

On Dec. 6 at 4 a.m. EST (0900 UTC), Alenga's maximum sustained winds were near 45 knots (52 mph/83 kmh). Alenga was located in the Southern Indian Ocean's open waters 560 nautical miles west of the Cocos Islands, near 12.8 South latitude and 87.5 East longitude. Alenga was moving to the southwest near 2 knots (3 mph/4 kmh).

Infrared satellite imagery Dec. 6 showed that the showers and thunderstorms within Alenga are decreasing, and the bands of thunderstorms around its center are weakening. The Joint Typhoon Warning Center noted that this weakening is only temporary as Alenga is forecast to regain strengthen before weakening again two days from now as it becomes an extra-tropical storm.

As Alenga continues to head southeast, it is moving into a hostile environment, where wind shear will increase and batter the tropical cyclone, weakening it.


Story Source:

The above story is based on materials provided by NASA/Goddard Space Flight Center. The original article was written by Rob Gutro and Hal Pierce. Note: Materials may be edited for content and length.


Cite This Page:

NASA/Goddard Space Flight Center. "NASA's TRMM satellite sees the power in Tropical Storm Alenga." ScienceDaily. ScienceDaily, 7 December 2011. <www.sciencedaily.com/releases/2011/12/111207001334.htm>.
NASA/Goddard Space Flight Center. (2011, December 7). NASA's TRMM satellite sees the power in Tropical Storm Alenga. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/2011/12/111207001334.htm
NASA/Goddard Space Flight Center. "NASA's TRMM satellite sees the power in Tropical Storm Alenga." ScienceDaily. www.sciencedaily.com/releases/2011/12/111207001334.htm (accessed July 23, 2014).

Share This




More Earth & Climate News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Orleans Plans to Recycle Cigarette Butts

New Orleans Plans to Recycle Cigarette Butts

AP (July 21, 2014) New Orleans is the first U.S. city to participate in a large-scale recycling effort for cigarette butts. The city is rolling out dozens of containers for smokers to use when they discard their butts. (July 21) Video provided by AP
Powered by NewsLook.com
Shark Sightings a Big Catch for Cape Tourism

Shark Sightings a Big Catch for Cape Tourism

AP (July 21, 2014) A rise in shark sightings along the shores of Chatham, Massachusetts is driving a surge of eager vacationers to the beach town looking to catch a glimpse of a great white. (July 21) Video provided by AP
Powered by NewsLook.com
Spectacular Lightning Storm Hits London

Spectacular Lightning Storm Hits London

AFP (July 19, 2014) A spectaCular lightning storm struck the UK overnight Friday. Images of lightning strikes over the Shard and Tower Bridge in central London. Duration: 00:23 Video provided by AFP
Powered by NewsLook.com
A Centuries' Old British Tradition Is Far from a Swan Song

A Centuries' Old British Tradition Is Far from a Swan Song

AFP (July 19, 2014) As if it weren't enough that the Queen is the Sovereign of the UK and 15 other Commonwealth realms, she is also the owner of all Britain's unmarked swans. Duration: 02:18 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins