thumb Argo er et observationssystem af jordens verdenshave som giver realtidsdata til anvendelse indenfor klima-, vejr-, oceanografi- og fiskeriforskning. Welcome to the Argo home page
Argo består af mere end 3000 små, frit drivende robotsonder i verdenshavene. Sonderne dykker ned til 2 km og flyder hver 10. dag op til overfladen. På vejen op måler sonderne vandets ledningsevne og temperaturprofil. Fra disse data beregnes salinitet og massefylde. Dataene sendes til forskere via satellit. Dataene er frit tilgængelige for alle, uden restriktioner. Det oprindelige projektmål, at søsætte 3.000 sonder, blev nået i november 2007.
Internationalt samarbejde Argo programmet er et samarbejde mellem 50 forsknings- og operationelleagenturer fra 26 lande, med USA bidragende med over halvdelen af udgifterne (status december 2004). Argo er en komponent af Integrated Ocean Observing System.
Dataresultater Josh Willis fra NASAs Jet Propulsion Laboratory har tidligere rapporteret at Argo systemet ikke har vist nogen havopvarmning siden det startede i 2003. "There has been a very slight cooling, but not anything really significant," har Willis udtalt. NPR report
Men efter at målefejl er blevet fjernet fra måledataene, viser det sig at verdenshavene faktisk er blevet varmere siden 2003. Nasa.gov: November 5, 2008 Correcting ocean cooling Citat: "...According to the float data on his computer screen, almost the entire Atlantic Ocean had gone cold. Unless you believe The Day After Tomorrow, Willis jokes, impossibly cold...side 3 “First, I identified some new Argo floats that were giving bad data...He was supposed to fly to Colorado that weekend to give a talk on “ocean cooling” to prominent climate researchers. Instead, he’d be talking about how it was all a mistake...What we found was that ocean heating was larger than scientists previously thought, and so the contribution of thermal expansion to sea level rise was actually 50 percent larger than previous estimates.”...“but also because the problems with the newest Argo data—the problems that Josh Willis found as well as other problems we have identified—haven’t been totally solved. For the most recent years [2003-2007], the sea level budget once again does not close. Our team is still working on that problem.”..."
Her er en graf baseret på Argo måledata frem til 2008/2009.
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Eksterne henvisninger
Argo Portal Realtime Interactive Map Realtime Google Earth File Coriolis Global Argo Data Server – EU Mirror NOAA/Pacific Marine Environmental Laboratory profiling float project deploys floats as part of the Argo program, provides data on-line , and is active in delayed-mode salinity calibration and quality control for US Argo floats.
Kategori:Oceanografi