Gases
N2O SF6 CFC-11 CFC-12 CFC-113 CCl4 CH3CCl3 C2Cl4 CH2Cl2 HCFC-22 HCFC-141b HCFC-142b HFC-32 HFC-125 HFC-134a HFC-143a HFC-152a HFC-227ea HFC-365mfc HFC-236fa halon-1211 halon-1301 halon-2402 CH3Br CH3Cl OCS PFC-116 CF4 NF3 SO2F2 C2H6 (Ethane) C3H8 (Propane)

HFC-152a

The HATS flask GC-MSD program measures several HFCs. Below are links to data files and figures for HFC-152a.

HFC-152a

Atmospheric dry mole fractions (parts-per-trillion or ppt) of HFC-152a measured by GC-MSD in the HATS flask program. Each point represents a monthly mean at one of 8-12 stations: Alert, Canada (ALT), Summit Greenland (SUM), Barrow, Alaska (BRW), Mace Head, Ireland (MHD), Trinidad Head, California (THD), Niwot Ridge, Colorado (NWR), Cape Kumukahi, Hawaii (KUM), Manua Loa, Hawaii (MLO), American Samoa (SMO), Cape Grim, Australia (CGO), Palmer Station, Antarctica (PSA), South Pole, Antarctica (SPO).

HFC-152a

Zonal mean dry mole fractions (ppt) are estimated by equally weighting monthly mean measurements in each latitude band. Small gaps (less than 6 months) are interpolated prior to averaging. Solid lines are used for Northern hemispheric measurements and dashed for the Southern hemisphere.

Selected Publications

  • Montzka, S. A. and G. Dutton, 2012: [Global climate] Ozone-depleting gases and their replacements [in "State of the Climate in 2011"]. Bull. Amer. Meteor. Soc., 93 (7), S68-S69.
  • Montzka, S.A., M. McFarland, S.O. Andersen, B.R. Miller, D.W. Fahey, B.D. Hall, L. Hu, C. Siso, J.W. Elkins, Recent trends in global emissions of hydrochlorofluorocarbons and hydrofluorocarbons-Reflecting on the 2007 Adjustments to the Montreal Protocol, J. Phys. Chem. A, 119, 4439-4449, doi:10.1021/jp5097376, 2015.