Annual global temperature increase: 2010 (NASA GISS)
Spring (January- April, April) global temperature increase: 2012 (NOAA)
Summer (June- August) global temperature increase:2010 (NASA)
July US temperature increase: 2012 (NOAA)
Summer sea ice extent low: 2012 (NSIDC)
Summer sea ice volume low: 2012
Spring-summer Arctic snow loss: 2012
Atmospheric greenhouse gas concentrations (CO2, CH4, N2O) highest in over 800,000 years by ice core data: current year still increasing.
Rate of increase in atmospheric CO2 concentration: unprecedented ie has never been higher (IPCC). Rate of increase of CH4 and N2O also assumed to be unprecedented.
Atmospheric CO2 concentration highest in 15 million years
Ocean acidification highest in 15 million years and rate of acidification highest in 300 million years.
State of the Climate 