Subscribe to our free daily newsletters
  Space Industry and Business News  




Subscribe to our free daily newsletters



EARTH OBSERVATION
Cyclone Tasha Adds To Severe Flooding Over Eastern Australia

TRMM captured this image of Tasha at 15:32 UTC (5:32 am AEST) on the 24th of December 2010 just before it became a Category 1 cyclone. Tasha appears as an area of enhanced rainfall with moderate (green areas) to localized areas of heavy rain (red areas) embedded within a broader area of light to moderate rain (blue and green areas, respectively) draped along the coast of northeastern Australia. Credit: SSAI/NASA Goddard, Hal Pierce
by Staff Writers
Greenbelt MD (SPX) Jan 04, 2011
Cyclone Tasha recently made landfall just south of Cairns along the northeast coast of Queensland, Australia during the early morning hours on Christmas Day.

The storm, which had formed just off the coast, came ashore as a Category 1 cyclone (equivalent to a tropical storm on the U.S. Saffir-Simpson scale) with wind gusts of up to 105 kph (~65 mph) reported just offshore.

The Tropical Rainfall Measuring Mission satellite (known as TRMM) was launched back in 1997 with the primary purpose of measuring rainfall in the Tropics.

With its unique combination of active radar and passive microwave sensors, TRMM has also served as a valuable platform for monitoring tropical cyclones. TRMM captured an image of Tasha at 15:32 UTC (5:32 am AEST) on the 24th of December 2010 just before it became a Category 1 cyclone.

Tasha appears as an area of enhanced rainfall with moderate to localized areas of heavy rain embedded within a broader area of light to moderate rain draped along the coast of northeastern Australia.

Tasha has no eye and little evidence of banding, which indicates that it is not an intense system. In fact, Tasha's winds did little damage and the storm was quickly downgraded from a cyclone by the Australian Bureau of Meteorology's Tropical Cyclone Warning Centre; however, heavy rains from the storm and its remnants had a substantial impact on the region by exacerbating flood conditions already in place as a result of prior excessive rainfall across eastern Australia. The result was widespread flooding with many areas cut off.

For increased coverage, TRMM can be used to calibrate rainfall estimates from other satellites. The TRMM-based, near-real time Multi-satellite Precipitation Analysis (TMPA) at the NASA Goddard Space Flight Center in Greenbelt, Md. is used to monitor rainfall over the global Tropics.

TMPA rainfall totals were calculated for the period Dec. 1 to 29, 2010 for northeastern Australia and the surrounding region. Rainfall totals for the period exceed 300 mm (~12 inches) all along the northeast and northern coasts. Farther inland amounts drop off but still exceed 100 to 200 mm (~4 to 8 inches) over much of Queensland.

Although Tasha is responsible for dumping a lot of the rain over a short period (the Bureau had a report of up to 10 inches in 24 hours as a result of Tasha), eastern Australia had already been experiencing above normal rainfall as result of above normal ocean temperatures in the West Pacific due to La Nina.

La Nina, the counterpart to El Nino, occurs when enhanced trade winds pile up warmer-than-normal waters in the West Pacific while cooler-than-normal sea surface temperatures occur in the East Pacific.

This leads to enhanced evaporation over the warmer water in the West Pacific with the excess moisture carried along by stronger-than-normal trade winds.

The result is enhanced rainfall over the Maritime continent and northern and northeastern Australia during Northern Hemisphere winter (Southern Hemisphere summer) and drier-than-normal conditions over the Central and East Pacific.

TMPA rainfall anomalies for the month of December 2010 for the tropical Pacific and surrounding region were constructed by first computing the average rainfall rate over the period and then subtracting the 10-year average rate for the same period.

The resulting pattern shows a classic La Nina signature with above-normal areas of rain (shown in green and blue) over the Maritime continent and northeastern Australia and below-normal areas of rain (shown in brown over the Central Pacific.

The estimated property damage from all the flooding in eastern Australia, which by some accounts is the worst in 50 years, is expected to exceed $1 billion.



Share This Article With Planet Earth
del.icio.usdel.icio.us DiggDigg RedditReddit
YahooMyWebYahooMyWeb GoogleGoogle FacebookFacebook



Related Links
NASA Goddard Space Flight Center
Earth Observation News - Suppiliers, Technology and Application



Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News


EARTH OBSERVATION
Tidal Flats And Channels, Long Island, Bahamas
Washington DC (SPX) Jan 04, 2011
The islands of the Bahamas are situated on large depositional platforms-the Great and Little Bahama Banks-composed mainly of carbonate sediments ringed by reefs. The islands are the only parts of the platform currently exposed above sea level. The sediments were formed mostly from the skeletal remains of organisms settling to the sea floor; over geologic time, these sediments consolidated ... read more







EARTH OBSERVATION
Team Develops Functionally Graded Shape Memory Polymers

Graphene Grains Make Atom-Thick Patchwork Quilts

New Intel chip a coup for Hollywood

Recycled Haitian Concrete Can Be Safe, Strong And Less Expensive

EARTH OBSERVATION
IBCS Completes Warfighter-Centered Design Exercises

Arianespace Will Orbit Sicral 2 Milcomms Satellites

Codan Receives JITC Certification For 2110 HF Manpack

Northrop Grumman Bids for Marine Corps Common Aviation CnC

EARTH OBSERVATION
ILS and Satmex Announce The ILS Proton Launch Of Satmex 8

Ariane 5's Sixth Launch Of 2010

Europe launcher puts Spanish, S.Korean satellites into orbit

Suspected Debris Of Exploded Rocket Washes Ashore

EARTH OBSERVATION
Privacy Push Will Impact Geolocation Sector

President Medvedev Sacks Space Officials Over Satellite Loss

Galileo Pathfinder GIOVE-A Achieves Five Years In Orbit

Launch Of New Russian Navigation Satellite Postponed To Next Year

EARTH OBSERVATION
France 'confident' of winning Brazil plane contract

Clariant resumes aircraft de-icer output after winter halt

Cathay makes pay offer to pilots: report

Another power outages threatens Moscow's main airport

EARTH OBSERVATION
Better Control Of Building Blocks For Quantum Computer

S.Korea's Hynix says chip price slump will hit Q4 profit

Iridium Memories

Making Wafers Faster By Making Features Smaller

EARTH OBSERVATION
Sat-nav turtles go on trans-ocean trek

Cyclone Tasha Adds To Severe Flooding Over Eastern Australia

Tidal Flats And Channels, Long Island, Bahamas

GOES Look Back At 2010

EARTH OBSERVATION
British local authorities rubbished over trash backlog

Oceanic "Garbage Patch" Not Nearly As Big As Portrayed In Media

Britain's rubbish: cold and holidays pile up trash

Ombudsman probes 'outdated' Hong Kong air pollution rules


The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement