{ "items" : [
    { "id" : "http://dbpedia.org/resource/Quasi-biennial_oscillation"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "The quasi-biennial oscillation (QBO) is a quasiperiodic oscillation of the equatorial zonal wind between easterlies and westerlies  in the tropical stratosphere with a mean period of 28 to 29 months. The alternating wind regimes develop at the top of the lower stratosphere and propagate downwards at about 1 km (0.6 mi) per month until they are dissipated at the tropical tropopause. Downward motion of the easterlies is usually more irregular than that of the westerlies."] } } }
