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Topic: Ice

NASA’s Dawn Mission identifies Craters on Ceres where Ice could be trapped

 

Written by Elizabeth Zubritsky
NASA’s Goddard Space Flight Center

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – Scientists with NASA’s Dawn mission have identified permanently shadowed regions on the dwarf planet Ceres. Most of these areas likely have been cold enough to trap water ice for a billion years, suggesting that ice deposits could exist there now.

“The conditions on Ceres are right for accumulating deposits of water ice,” said Norbert Schorghofer, a Dawn guest investigator at the University of Hawaii at Manoa. “Ceres has just enough mass to hold on to water molecules, and the permanently shadowed regions we identified are extremely cold — colder than most that exist on the moon or Mercury.”

At the poles of Ceres, scientists have found craters that are permanently in shadow (indicated by blue markings). Such craters are called "cold traps" if they remain below about minus 240 degrees Fahrenheit (minus 151 degrees Celsius). (NASA/JPL-Caltech/UCLA/MPS/DLR/IDA)

At the poles of Ceres, scientists have found craters that are permanently in shadow (indicated by blue markings). Such craters are called “cold traps” if they remain below about minus 240 degrees Fahrenheit (minus 151 degrees Celsius). (NASA/JPL-Caltech/UCLA/MPS/DLR/IDA)

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NASA’s Mars Reconnaissance Orbiter discovers evidence of Ancient Volcanoes on Mars

 

Written by Guy Webster
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Volcanoes erupted beneath an ice sheet on Mars billions of years ago, far from any ice sheet on the Red Planet today, new evidence from NASA’s Mars Reconnaissance Orbiter suggests.

The research about these volcanoes helps show there was extensive ice on ancient Mars. It also adds information about an environment combining heat and moisture, which could have provided favorable conditions for microbial life.

Sheridan Ackiss of Purdue University, West Lafayette, Indiana, and collaborators used the orbiter’s mineral-mapping spectrometer to investigate surface composition in an oddly textured region of southern Mars called “Sisyphi Montes.”

This graphic illustrates where Mars mineral-mapping from orbit has detected minerals that can indicate where a volcano erupted beneath an ice sheet. The site is far from any ice sheet on modern Mars, in an area where unusual shapes have been interpreted as a possible result of volcanism under ice. (NASA/JPL-Caltech/JHUAPL/ASU)

This graphic illustrates where Mars mineral-mapping from orbit has detected minerals that can indicate where a volcano erupted beneath an ice sheet. The site is far from any ice sheet on modern Mars, in an area where unusual shapes have been interpreted as a possible result of volcanism under ice. (NASA/JPL-Caltech/JHUAPL/ASU)

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AAA reports Potholes costing Drivers Billions in Repairs

 

AAA finds two-thirds of American motorists are concerned about potholes

AAAKnoxville, TN – As snow and ice begins to melt on roadways, the asphalt becomes compromised. Potholes are formed by water intrusion in the cracks of the asphalt. As a result, the material laid underneath the road softens causing weak spots to collapse under the weight of constant traffic.

AAA cautions drivers to remain alert to avoid pothole damage and urges state and local governments to fully fund and prioritize road maintenance to reduce vehicle damage, repair costs and driver frustration.

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Clarksville-Montgomery County under Travelers Advisory today, January 24th

 

National Weather ServiceNashville, TN – The National Weather Service (NWS) in Nashville has issued a travelers advisory for Clarksville-Montgomery County and all of Middle Tennessee through this morning.

Melting of ice and snow has occurred and will continue today on roadways across the mid state.

As a result, hazardous driving conditions are expected this morning and later tonight when freezing temperatures return to the area.

Snow and ice are still on Highway 48/13 this morning in front of Montgomery Central High School.

Snow and ice are still on Highway 48/13 this morning in front of Montgomery Central High School.

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City of Clarksville issues update on Roads and Services

 

City of Clarksville - Clarksville, TNClarksville, TN – As of noon today, all of the City of Clarskville’s major roads should be cleared. The Street Department is now able to focus on the residential areas and they should be cleared by tomorrow afternoon.

In addition to every available piece of equipment the City had on hand, four additional road graders were rented to help clear the ice and snow.

Clarksville Street Department has cleared all major roads. They are now focusing on residential areas.

Clarksville Street Department has cleared all major roads. They are now focusing on residential areas.

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Clarksville Department of Electricity reports Two Large Outages

 

Clarksville Department of Electricity - CDE - CDE LightbandClarksville, TN – Clarksville Department of Electricity (CDE) is working two large outages at this time around the Porters Bluff, Trahern Terrace, Madison Terrace area and another along 2190 Memorial Drive and Kingswood Court.

Porters Bluff, Trahern Terrace, Madison Terrace area and another along 2190 Memorial Drive and Kingswood Court

Porters Bluff, Trahern Terrace, Madison Terrace area and another along 2190 Memorial Drive and Kingswood Court

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Clarksville-Montgomery County expected to see 6 to 10 inches of Snow

 

National Weather ServiceNashville, TN – The National Weather Service (NWS) in Nashville has issued a winter storm warning for Clarksville-Montgomery County as well as most of Middle Tennessee through Saturday morning. A winter weather advisory is in effect for the far southern counties of Middle Tennessee through Saturday morning.

It is currently snowing in Clarksville-Montgomery County with 18 MPH winds out of the North. It is 26°F outside and the high today will be 32°F. Power lines are covered in ice from freezing rain early this morning. Some trees, limbs and power lines may be knocked down creating scattered power outages in the area.

Some trees and power lines may be knocked down from the weight of snow and ice and scattered power outages are possible.

Some trees and power lines may be knocked down from the weight of snow and ice and scattered power outages are possible.

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National Weather Service issues update on Winter Storm headed toward Clarksville-Montgomery County, Friday

 

National Weather ServiceNashville, TN – The National Weather Service (NWS) in Nashville has issued a winter storm warning for snow and ice which is in effect from 6:00pm Friday to 6:00am CT Saturday for Clarksville-Montgomery County and most of Middle Tennessee.

A potent weather system will move into the region tonight offering up quite a bit of rain. But, as we get into the pre dawn hours on Friday, cold air supportive of wintry weather will begin to move into Middle Tennessee.

A Winter Storm Warning is in effect for Clarksville-Montgomery County tonight and Friday.

A Winter Storm Warning is in effect for Clarksville-Montgomery County tonight and Friday.

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4 to 8 inches of Snow now expected for Clarksville-Montgomery County, Friday

 

National Weather ServiceNashville, TN – The National Weather Service (NWS) in Nashville has issued a winter storm warning for snow and ice which is in effect from 6:00pm Friday to 6:00am CT Saturday for Clarksville-Montgomery County.

Snow accumulations from 4 to 8 inches are possible with locally higher amounts. Ice accumulations of up to a tenth of an inch are possible, especially for counties closest to the Kentucky state line.

Clarksville-Montgomery County can expect 4 to 8 inches of snow Friday, January 22nd.

Clarksville-Montgomery County can expect 4 to 8 inches of snow Friday, January 22nd.

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Clarksville-Montgomery County under Winter Storm Warning starting Friday morning, 3 to 6 inches of Snow expected

 

National Weather ServiceNashville, TN – The National Weather Service (NWS) in Nashville has issued a winter storm warning for snow and ice which is in effect from 6:00am Friday to 6:00am CT Saturday for Clarksville-Montgomery County and parts of Middle Tennessee. The winter storm watch is no longer in effect.

A potent weather system will move into the region tonight offering up quite a bit of rain prior to midnight tonight. As we get into the early morning hours on Friday, cold air supportive of wintry weather will begin to move into Middle Tennessee.

Winter storm warning in effect for Clarksville-Montgomery County from 6:00am CT Friday to 6:00am CT Saturday.

Winter storm warning in effect for Clarksville-Montgomery County from 6:00am CT Friday to 6:00am CT Saturday.

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