Arctic Sea Ice Underestimated for Weeks Due to Faulty Sensor

Discussion in 'Environment' started by DavidS, Feb 20, 2009.

  1. DavidS
    Offline

    DavidS Anti-Tea Party Member

    Joined:
    Sep 7, 2008
    Messages:
    9,811
    Thanks Received:
    766
    Trophy Points:
    48
    Location:
    New York, NY
    Ratings:
    +767
    Bloomberg.com: News

    Feb. 20 (Bloomberg) -- A glitch in satellite sensors caused scientists to underestimate the extent of Arctic sea ice by 500,000 square kilometers (193,000 square miles), a California- size area, the U.S. National Snow and Ice Data Center said.



    The error, due to a problem called “sensor drift,” began in early January and caused a slowly growing underestimation of sea ice extent until mid-February. That’s when “puzzled readers” alerted the NSIDC about data showing ice-covered areas as stretches of open ocean, the Boulder, Colorado-based group said on its Web site.



    “Sensor drift, although infrequent, does occasionally occur and it is one of the things that we account for during quality- control measures prior to archiving the data,” the center said. “Although we believe that data prior to early January are reliable, we will conduct a full quality check.’’



    :oops:
     
  2. dilloduck
    Offline

    dilloduck Diamond Member

    Joined:
    May 8, 2004
    Messages:
    53,240
    Thanks Received:
    5,552
    Trophy Points:
    1,850
    Location:
    Austin, TX
    Ratings:
    +6,403
    It's science ----It couldn't possibly be wrong. :lol:
     
  3. AllieBaba
    Offline

    AllieBaba BANNED

    Joined:
    Oct 2, 2007
    Messages:
    33,778
    Thanks Received:
    3,648
    Trophy Points:
    0
    Ratings:
    +3,650
    Ruh roh, Shaggy...
    Time for a Scooby snack!
     
  4. SpidermanTuba
    Offline

    SpidermanTuba BANNED

    Joined:
    May 7, 2004
    Messages:
    6,101
    Thanks Received:
    258
    Trophy Points:
    0
    Location:
    New Orleans, Louisiana
    Ratings:
    +258



    Wait, I thought GW was a conspiracy of lies? Wouldn't they just not tell anyone there was a sensor problem if they were trying to conspire to lie?
     
  5. Old Rocks
    Online

    Old Rocks Diamond Member

    Joined:
    Oct 31, 2008
    Messages:
    46,452
    Thanks Received:
    5,409
    Trophy Points:
    1,840
    Location:
    Portland, Ore.
    Ratings:
    +10,297
    Yep, the estimated loss of ice has been corrected. The mistake involved an area the size of the state of California. So the corrected figure only puts the loss as the size of Texas and Alaska combined.
     
  6. FactFinder
    Offline

    FactFinder VIP Member

    Joined:
    Mar 1, 2009
    Messages:
    2,641
    Thanks Received:
    202
    Trophy Points:
    83
    Ratings:
    +237
    That’s when “puzzled readers” alerted the NSIDC about data showing ice-covered areas as stretches of open ocean, the Boulder, Colorado-based group said on its Web site.

    Did anyone bother to look at the alleged ocean?

    I occasionally get my butt up and look out the window. Where was Google Earth?
     
    Last edited: Mar 2, 2009
  7. FactFinder
    Offline

    FactFinder VIP Member

    Joined:
    Mar 1, 2009
    Messages:
    2,641
    Thanks Received:
    202
    Trophy Points:
    83
    Ratings:
    +237
    Recent cold snap helping Arctic sea ice, scientists find

    Canadian scientists are also noticing growing ice coverage in most areas of the Arctic, including the southern Davis Strait and the Beaufort Sea.

    "Clearly, we're seeing the ice coverage rebound back to more near normal coverage for this time of year," said Gilles Langis, a senior ice forecaster with the Canadian Ice Service in Ottawa.

    Winter sea ice could keep expanding
     
  8. Old Rocks
    Online

    Old Rocks Diamond Member

    Joined:
    Oct 31, 2008
    Messages:
    46,452
    Thanks Received:
    5,409
    Trophy Points:
    1,840
    Location:
    Portland, Ore.
    Ratings:
    +10,297
    Arctic Sea Ice News & Analysis

    February 26, 2009
    Near-real-time data now available

    Sign up for the Arctic Sea Ice News RSS feed for automatic notification of analysis updates. Updates are also available via Twitter.

    Near-real-time sea ice data updates are again available from Arctic Sea Ice News & Analysis. We have switched to the Special Sensor Microwave/Imager (SSM/I) sensor on the Defense Meteorological Satellite Program (DMSP) F13 satellite following the sensor drift problem described in our February 18 post.

    The temporary error in the near-real-time data does not change the conclusion that Arctic sea ice extent has been declining for the past three decades. This conclusion is based on peer reviewed analysis of quality-controlled data products, not near-real-time data.
     
  9. AllieBaba
    Offline

    AllieBaba BANNED

    Joined:
    Oct 2, 2007
    Messages:
    33,778
    Thanks Received:
    3,648
    Trophy Points:
    0
    Ratings:
    +3,650
    In other words, it's not real.
     
  10. Old Rocks
    Online

    Old Rocks Diamond Member

    Joined:
    Oct 31, 2008
    Messages:
    46,452
    Thanks Received:
    5,409
    Trophy Points:
    1,840
    Location:
    Portland, Ore.
    Ratings:
    +10,297
    In other words, you have comprehension problems. The real time data is what we get day to day, unchecked for drift like we saw occur on the sensor on that satelite. Perhaps you should read the article, it might improve your abilities to write a sensible answer.
     

Share This Page