state-of-sea-ice-jan2015

State of the Sea Ice – January 2015

 Guest essay by Robert A Cook, PE Annually, the President is required to address the nation and report on the State of the Union. Other writers here regularly report on the oceans and El Nino/ENSO conditions, the duration and status of the extended “pause” in global warming we now are enjoying, and the global average…

L indicates the atmospheric river's low-pressure trough and H indicates the blocking high-pressure ridge further downstream, directing moisture transport (red arrows) into the Dronning Maud Land and the Princess Elisabeth base (white square). The colours show total moisture amounts (in centimetres equivalent of water). Credit: Irina Gorodetskaya

Stemming ice loss, giant atmospheric rivers add mass to Antarctica’s ice sheet

Extreme weather phenomena called atmospheric rivers were behind intense snowstorms recorded in 2009 and 2011 in East Antarctica. The resulting snow accumulation partly offset recent ice loss from the Antarctic ice sheet, report researchers from KU Leuven. Atmospheric rivers are long, narrow water vapour plumes stretching thousands of kilometres across the sky over vast ocean…

vostok_temperature_methane[1]

Vostok and the 8000 year time lag

Guest essay by Euan Mearns In their seminal paper on the Vostok Ice Core, Petit et al (1999) [1] note that CO2 lags temperature during the onset of glaciations by several thousand years but offer no explanation. They also observe that CH4 and CO2 are not perfectly aligned with each other but offer no explanation.…