OCADSAccess DataAtmospheric Histories (1765-2022) for CFC-11, CFC-12, CFC-113, CCl4, SF6 and N2O
NDP-095 (2015)
Atmospheric Histories (1765-2022) for CFC-11, CFC-12, CFC-113, CCl4, SF6 and N2O
(updated 21 July 2023)
John L. Bullister1; Mark J. Warner2
Prepared by Alex Kozyr3
1Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, Washington, USA2University of Washington, School of Oceanography, Seattle, Washington, USA
3Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
Citation
Please cite as:
Bullister, John L.; Warner, Mark J. (2017). Atmospheric Histories (1765-2022) for CFC-11, CFC-12, CFC-113, CCl4, SF6 and N2O (NCEI Accession 0164584). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.cfc_atm_hist_2015.
NDP-095 Data Files
PDF Document
Abstract
It has been several years since Bullister (2015) prepared tables and figures of the annual mean tropospheric concentrations in the northern (NH) and southern (SH) hemispheres for the trace gases: CFC-11, CFC-12, CFC-113, carbon tetrachloride (CCl4), sulfur hexafluoride (SF6), and nitrous oxide (N2O). This is the first of periodic updates to the tables and figures compiled following similar methods with updated measurements from the community of scientists who monitor the global distributions of these compounds in the troposphere. The datafile, Tracer_atmospheric_histories_revised_2023_Table1.csv, and Table 1 list the annual mean tropospheric concentrations of CFC-11, CFC-12, CFC-113, CCl4, SF6, and N2O in the northern and southern hemispheres (NH, SH) from 1765.5 to 2022.5. The reported values are the annual (Jan-Dec) mean mole fraction of these gases in dry air. Concentrations are in parts per trillion (ppt) for CFC-11, CFC-12, CFC-113, CCl4, and SF6; and in parts per billion (ppb) for N2O.
Details for CFC-11, CFC-12, CFC-113 and CCl4
The concentrations for CFC-11, CFC-12, CFC-113, and CCl4 listed in Table 1 for 1910.5 – 2008.5 are from the 2009 update of the Walker et al. (2000) results found at bluemoon.ucsd.edu/pub/cfchist. The concentrations for these trace gases from 2009.5 to 2022.5 are derived from the NOAA gas sampling program formerly known as CMDL, now known as GML (Global Monitoring Laboratory). These NOAA data are tabulated through Feb. 2023 (as of June 2023) and can be located in the subdirectories of https://gml.noaa.gov/aftp/data/hats/. Following the procedure of Bullister (2017), the changes in the annual average (Jan-Dec) concentrations of the trace gases in ppt were added to the Walker et al. data. The sum of the changes in concentrations between 2008.5 and 2019.5 in the GML data set are slightly different than the differences in the global mean concentrations reported by the AGAGE measurement program (https://agage2.eas.gatech.edu/data_archive/global_mean/) which may indicate a small systematic offset. These differences are consistent with those reported by Rigby et al. (2013) for the earlier part of this time period.
Details for SF6
Bullister (2017) normalized the cumulative production and release estimates of this compound to the measured atmospheric concentrations of this tracer in the Northern and Southern Hemispheres in June 1995 by the NOAA gas sampling program – currently found at https://gml.noaa.gov/aftp/hats/sf6/combined/HATS_global_SF6.txt. In Table 1, the SF6 values from 1996.5 to 2022.5 are the mean annual NH and SH values reported by GML. Note that the GML concentrations are now reported on the NOAA 2014 scale, instead of the CMDL2006 scale as in Bullister (2017). Although the conversion between the two NOAA scales requires solving a quadratic equation (see https://gml.noaa.gov/ccl/sf6_scale.html) to revert to the CMDL 2006 scale, Krummell et al. (2017) reported that NOAA 2014/ SIO 2005 = 1.002 (± 0.002). The SF6 data in Table 1 are reported on the SIO2005 scale using this conversion factor. The AGAGE program reports SF6 concentrations beginning in 2004. A comparison of the increase in reported atmospheric concentrations between 2004.5 and 2020.5 differ by less than 0.20 ppt between AGAGE (increase of 4.88 ppt in 16 y) and GML (increase of 4.76 ppt (NH) and 4.68 ppt (SH) in 16 y).
Details for N2O
Bullister (2017) fitted a linear non-polynomial function to the combined ice core measurements (1502-1996) and CMDL atmospheric measurements (1978-2015) of N2O concentrations. In the plots of the residuals of the data to this fit (Figs. 10 and 11, Bullister 2017), there appears to be a slight positive bias in the most recent atmospheric measurements. In this update, the N2O concentrations reported in Table 1 after 2010.5 are the annual averages from the GML data (https://gml.noaa.gov/aftp/data/hats/n2o/combined/), although the data prior to 2010.5 are calculated from the fitted data through 2015.5. The difference in N2O values in Table 1 from those in Table 1 of Bullister (2017) for 2010.5 to 2015.5 are (in ppb).
The fits used are:
N2Onh(t) = (a0) + (a1 × exp(T)) + (a2 × T × exp(T))
where:
| t | = | time (in decimal years) |
| N2Onh(t) | = | NH concentration of N2O as function of t |
| T | = | (t − µ1)/µ2 |
| µ1 | = | 1977.21 |
| µ2 | = | 67.48 |
| a0 | = | 269.6871 |
| a1 | = | 30.9728 |
| a2 | = | 4.3598 |
and:
N2Osh(t) = (a0) + (a1 × exp(T)) + (a2 × T × exp(T))
where:
| t | = | time (in decimal years) |
| N2Osh(t) | = | SH concentration of N2O as function of t |
| T | = | (t − µ1)/µ2 |
| µ1 | = | 1977.21 |
| µ2 | = | 67.48 |
| a0 | = | 269.8026 |
| a1 | = | 30.2498 |
| a2 | = | 4.3381 |
Mid-year values of N2O from 1855.5 to 2015.5 are calculated from these fits and reported in Table 1. Because of the sparseness and large uncertainties in the ice core data, both NH and SH N2O concentrations reported in Table 1 for the years prior to 1855.5 (1765.5-1854.5) are the mean of the values from the fits to the NH and SH for those years.
The N2O concentrations are reported on the NOAA 2006A calibration scale: http://www.esrl.noaa.gov/gmd/ccl/index.html.
Additional Notes
There may be very slight differences (4 and SF6 reported in this version of Table 1 vs. previous versions, due to small revisions and re-calibration of earlier measurements by the CMDL and SIO groups.
Acknowledgements
Author thanks NOAA's Earth System Research Laboratory, Global Monitoring Division and the ALE/GAGE/AGAGE programs at UCSD/SIO for making their atmospheric data available.
This work was supported by NOAA's Climate Program Office. This is PMEL Contribution # 4318.
Data
Table 1. Annual mean tropospheric CFC-11, CFC-12, CFC-113, carbon tetrachloride (CCl4), sulfur hexafluoride (SF6) and nitrous oxide (N2O) concentrations in the northern (NH) and southern (SH) hemispheres for the period 1765.5 to 2015.5 The concentrations are expressed as the mixing ratio (mole fraction) of the trace gas in dry air and are reported in parts-per-trillion (ppt) for CFC-11, CFC-12, CFC-113, SF6 and as parts-per-billion (ppb) for N2O. CFC-11, CFC-12, CFC-113, and CCl4 concentrations are reported on the SIO98 calibration scale; SF6 concentrations are reported on the SIO2005 calibration scale and N20 concentrations on the CMDL2006A scale.
| Year | CFC11NH (ppt) |
CFC11SH (ppt) |
CFC12NH (ppt) |
CFC12SH (ppt) |
CFC113NH (ppt) |
CFC113SH (ppt) |
CCl4NH (ppt) |
CCl4SH (ppt) |
SF6NH (ppt) |
SF6SH (ppt) |
N2ONH (ppb) |
N2OSH (ppb) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1765.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.47 | 270.47 |
| 1766.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.49 | 270.49 |
| 1767.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.50 | 270.50 |
| 1768.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.52 | 270.52 |
| 1769.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.53 | 270.53 |
| 1770.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.55 | 270.55 |
| 1771.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.56 | 270.56 |
| 1772.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.58 | 270.58 |
| 1773.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.59 | 270.59 |
| 1774.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.61 | 270.61 |
| 1775.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.62 | 270.62 |
| 1776.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.64 | 270.64 |
| 1777.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.66 | 270.66 |
| 1778.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.67 | 270.67 |
| 1779.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.69 | 270.69 |
| 1780.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.71 | 270.71 |
| 1781.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.73 | 270.73 |
| 1782.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.74 | 270.74 |
| 1783.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.76 | 270.76 |
| 1784.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.78 | 270.78 |
| 1785.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.80 | 270.80 |
| 1786.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.82 | 270.82 |
| 1787.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.84 | 270.84 |
| 1788.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.86 | 270.86 |
| 1789.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.88 | 270.88 |
| 1790.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.90 | 270.90 |
| 1791.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.92 | 270.92 |
| 1792.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.95 | 270.95 |
| 1793.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.97 | 270.97 |
| 1794.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 270.99 | 270.99 |
| 1795.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.02 | 271.02 |
| 1796.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.04 | 271.04 |
| 1797.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.06 | 271.06 |
| 1798.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.09 | 271.09 |
| 1799.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.11 | 271.11 |
| 1800.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.14 | 271.14 |
| 1801.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.16 | 271.16 |
| 1802.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.19 | 271.19 |
| 1803.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.21 | 271.21 |
| 1804.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.24 | 271.24 |
| 1805.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.27 | 271.27 |
| 1806.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.30 | 271.30 |
| 1807.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.33 | 271.33 |
| 1808.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.36 | 271.36 |
| 1809.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.39 | 271.39 |
| 1810.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.42 | 271.42 |
| 1811.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.45 | 271.45 |
| 1812.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.48 | 271.48 |
| 1813.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.51 | 271.51 |
| 1814.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.54 | 271.54 |
| 1815.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.57 | 271.57 |
| 1816.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.61 | 271.61 |
| 1817.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.64 | 271.64 |
| 1818.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.67 | 271.67 |
| 1819.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.71 | 271.71 |
| 1820.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.75 | 271.75 |
| 1821.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.78 | 271.78 |
| 1822.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.82 | 271.82 |
| 1823.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.86 | 271.86 |
| 1824.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.89 | 271.89 |
| 1825.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.93 | 271.93 |
| 1826.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 271.97 | 271.97 |
| 1827.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.01 | 272.01 |
| 1828.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.05 | 272.05 |
| 1829.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.10 | 272.10 |
| 1830.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.14 | 272.14 |
| 1831.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.18 | 272.18 |
| 1832.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.23 | 272.23 |
| 1833.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.27 | 272.27 |
| 1834.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.32 | 272.32 |
| 1835.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.36 | 272.36 |
| 1836.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.41 | 272.41 |
| 1837.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.46 | 272.46 |
| 1838.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.51 | 272.51 |
| 1839.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.56 | 272.56 |
| 1840.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.61 | 272.61 |
| 1841.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.66 | 272.66 |
| 1842.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.71 | 272.71 |
| 1843.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.77 | 272.77 |
| 1844.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.82 | 272.82 |
| 1845.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.88 | 272.88 |
| 1846.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.93 | 272.93 |
| 1847.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 272.99 | 272.99 |
| 1848.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.05 | 273.05 |
| 1849.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.11 | 273.11 |
| 1850.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.17 | 273.17 |
| 1851.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.23 | 273.23 |
| 1852.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.29 | 273.29 |
| 1853.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.35 | 273.35 |
| 1854.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.42 | 273.42 |
| 1855.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.48 | 273.48 |
| 1856.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.55 | 273.55 |
| 1857.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.62 | 273.61 |
| 1858.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.69 | 273.68 |
| 1859.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.76 | 273.75 |
| 1860.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.83 | 273.82 |
| 1861.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.91 | 273.89 |
| 1862.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 273.98 | 273.97 |
| 1863.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.06 | 274.04 |
| 1864.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.14 | 274.12 |
| 1865.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.22 | 274.19 |
| 1866.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.30 | 274.27 |
| 1867.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.38 | 274.35 |
| 1868.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.46 | 274.43 |
| 1869.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.55 | 274.51 |
| 1870.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.63 | 274.60 |
| 1871.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.72 | 274.68 |
| 1872.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.81 | 274.77 |
| 1873.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.90 | 274.86 |
| 1874.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 274.99 | 274.95 |
| 1875.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 275.08 | 275.04 |
| 1876.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 275.18 | 275.13 |
| 1877.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 275.27 | 275.23 |
| 1878.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 275.37 | 275.32 |
| 1879.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 275.47 | 275.42 |
| 1880.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 275.58 | 275.52 |
| 1881.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 275.68 | 275.62 |
| 1882.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 275.79 | 275.72 |
| 1883.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 275.89 | 275.83 |
| 1884.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 276.00 | 275.93 |
| 1885.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 276.11 | 276.04 |
| 1886.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 276.23 | 276.15 |
| 1887.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 276.34 | 276.26 |
| 1888.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 276.46 | 276.38 |
| 1889.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 276.58 | 276.49 |
| 1890.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 276.70 | 276.61 |
| 1891.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 276.82 | 276.73 |
| 1892.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 276.95 | 276.85 |
| 1893.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 277.07 | 276.98 |
| 1894.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 277.20 | 277.10 |
| 1895.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 277.33 | 277.23 |
| 1896.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 277.47 | 277.36 |
| 1897.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 277.60 | 277.49 |
| 1898.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 277.74 | 277.63 |
| 1899.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 277.88 | 277.77 |
| 1900.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 278.03 | 277.91 |
| 1901.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 278.17 | 278.05 |
| 1902.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 278.32 | 278.20 |
| 1903.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 278.47 | 278.34 |
| 1904.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 278.62 | 278.49 |
| 1905.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 278.78 | 278.64 |
| 1906.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 278.94 | 278.80 |
| 1907.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 279.10 | 278.96 |
| 1908.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 279.26 | 279.12 |
| 1909.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 279.43 | 279.28 |
| 1910.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 279.60 | 279.44 |
| 1911.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.00 | 0.00 | 0.00 | 279.77 | 279.61 |
| 1912.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.10 | 0.00 | 0.00 | 279.95 | 279.78 |
| 1913.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.10 | 0.00 | 0.00 | 280.13 | 279.96 |
| 1914.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.10 | 0.00 | 0.00 | 280.31 | 280.14 |
| 1915.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.30 | 0.20 | 0.00 | 0.00 | 280.49 | 280.32 |
| 1916.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.30 | 0.00 | 0.00 | 280.68 | 280.50 |
| 1917.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.80 | 0.50 | 0.00 | 0.00 | 280.87 | 280.69 |
| 1918.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.70 | 0.00 | 0.00 | 281.07 | 280.88 |
| 1919.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.10 | 0.90 | 0.00 | 0.00 | 281.26 | 281.07 |
| 1920.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.20 | 1.10 | 0.00 | 0.00 | 281.46 | 281.27 |
| 1921.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.30 | 1.20 | 0.00 | 0.00 | 281.67 | 281.46 |
| 1922.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.40 | 1.20 | 0.00 | 0.00 | 281.88 | 281.67 |
| 1923.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.70 | 1.40 | 0.00 | 0.00 | 282.09 | 281.87 |
| 1924.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.90 | 1.60 | 0.00 | 0.00 | 282.30 | 282.08 |
| 1925.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.20 | 1.80 | 0.00 | 0.00 | 282.52 | 282.30 |
| 1926.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.50 | 2.10 | 0.00 | 0.00 | 282.74 | 282.52 |
| 1927.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.80 | 2.40 | 0.00 | 0.00 | 282.97 | 282.74 |
| 1928.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.10 | 2.70 | 0.00 | 0.00 | 283.20 | 282.96 |
| 1929.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.60 | 3.00 | 0.00 | 0.00 | 283.43 | 283.19 |
| 1930.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 4.20 | 3.50 | 0.00 | 0.00 | 283.67 | 283.42 |
| 1931.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 4.80 | 4.10 | 0.00 | 0.00 | 283.91 | 283.66 |
| 1932.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 5.40 | 4.60 | 0.00 | 0.00 | 284.16 | 283.90 |
| 1933.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 6.00 | 5.20 | 0.00 | 0.00 | 284.41 | 284.14 |
| 1934.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 6.80 | 5.80 | 0.00 | 0.00 | 284.66 | 284.39 |
| 1935.5 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 7.80 | 6.60 | 0.00 | 0.00 | 284.92 | 284.64 |
| 1936.5 | 0.00 | 0.00 | 0.10 | 0.00 | 0.00 | 0.00 | 8.90 | 7.50 | 0.00 | 0.00 | 285.18 | 284.90 |
| 1937.5 | 0.00 | 0.00 | 0.10 | 0.10 | 0.00 | 0.00 | 10.30 | 8.60 | 0.00 | 0.00 | 285.45 | 285.16 |
| 1938.5 | 0.00 | 0.00 | 0.20 | 0.10 | 0.00 | 0.00 | 11.60 | 9.90 | 0.00 | 0.00 | 285.72 | 285.43 |
| 1939.5 | 0.00 | 0.00 | 0.30 | 0.20 | 0.00 | 0.00 | 12.90 | 11.10 | 0.00 | 0.00 | 286.00 | 285.70 |
| 1940.5 | 0.00 | 0.00 | 0.40 | 0.30 | 0.00 | 0.00 | 14.40 | 12.40 | 0.00 | 0.00 | 286.28 | 285.97 |
| 1941.5 | 0.00 | 0.00 | 0.50 | 0.40 | 0.00 | 0.00 | 16.20 | 14.00 | 0.00 | 0.00 | 286.56 | 286.25 |
| 1942.5 | 0.00 | 0.00 | 0.70 | 0.50 | 0.00 | 0.00 | 18.50 | 15.80 | 0.00 | 0.00 | 286.86 | 286.54 |
| 1943.5 | 0.00 | 0.00 | 0.90 | 0.70 | 0.00 | 0.00 | 21.20 | 18.00 | 0.00 | 0.00 | 287.15 | 286.83 |
| 1944.5 | 0.00 | 0.00 | 1.20 | 0.90 | 0.00 | 0.00 | 24.20 | 20.50 | 0.00 | 0.00 | 287.45 | 287.12 |
| 1945.5 | 0.10 | 0.00 | 1.70 | 1.20 | 0.00 | 0.00 | 26.70 | 23.20 | 0.00 | 0.00 | 287.76 | 287.42 |
| 1946.5 | 0.10 | 0.10 | 2.30 | 1.70 | 0.00 | 0.00 | 28.20 | 25.30 | 0.00 | 0.00 | 288.07 | 287.73 |
| 1947.5 | 0.10 | 0.10 | 3.40 | 2.40 | 0.00 | 0.00 | 30.10 | 27.10 | 0.00 | 0.00 | 288.38 | 288.04 |
| 1948.5 | 0.20 | 0.10 | 4.80 | 3.40 | 0.00 | 0.00 | 32.50 | 29.20 | 0.00 | 0.00 | 288.71 | 288.35 |
| 1949.5 | 0.40 | 0.20 | 6.10 | 4.70 | 0.00 | 0.00 | 34.20 | 31.20 | 0.00 | 0.00 | 289.03 | 288.67 |
| 1950.5 | 0.70 | 0.40 | 7.60 | 6.00 | 0.00 | 0.00 | 35.60 | 32.90 | 0.00 | 0.00 | 289.36 | 288.99 |
| 1951.5 | 1.01 | 0.70 | 9.20 | 7.40 | 0.00 | 0.00 | 37.30 | 34.40 | 0.00 | 0.00 | 289.70 | 289.33 |
| 1952.5 | 1.51 | 1.01 | 11.00 | 9.00 | 0.00 | 0.00 | 38.40 | 35.90 | 0.00 | 0.00 | 290.05 | 289.66 |
| 1953.5 | 2.21 | 1.51 | 12.80 | 10.70 | 0.00 | 0.00 | 39.30 | 37.00 | 0.04 | 0.04 | 290.40 | 290.01 |
| 1954.5 | 3.02 | 2.21 | 15.00 | 12.60 | 0.00 | 0.00 | 39.70 | 37.80 | 0.04 | 0.04 | 290.75 | 290.35 |
| 1955.5 | 4.12 | 3.02 | 17.40 | 14.70 | 0.00 | 0.00 | 40.10 | 38.30 | 0.04 | 0.04 | 291.11 | 290.71 |
| 1956.5 | 5.33 | 4.02 | 20.20 | 17.10 | 0.00 | 0.00 | 40.40 | 38.70 | 0.04 | 0.04 | 291.48 | 291.07 |
| 1957.5 | 6.83 | 5.23 | 23.40 | 19.90 | 0.00 | 0.00 | 40.60 | 39.00 | 0.05 | 0.04 | 291.86 | 291.43 |
| 1958.5 | 8.14 | 6.53 | 26.80 | 23.00 | 0.00 | 0.00 | 41.50 | 39.50 | 0.05 | 0.04 | 292.23 | 291.80 |
| 1959.5 | 9.45 | 7.84 | 30.50 | 26.30 | 0.00 | 0.00 | 42.60 | 40.30 | 0.05 | 0.05 | 292.62 | 292.18 |
| 1960.5 | 11.06 | 9.15 | 35.00 | 30.10 | 0.00 | 0.00 | 43.70 | 41.20 | 0.05 | 0.05 | 293.01 | 292.57 |
| 1961.5 | 13.27 | 10.85 | 40.00 | 34.40 | 0.10 | 0.10 | 44.70 | 42.20 | 0.06 | 0.06 | 293.41 | 292.96 |
| 1962.5 | 16.18 | 13.07 | 45.80 | 39.40 | 0.30 | 0.10 | 45.90 | 43.30 | 0.07 | 0.06 | 293.82 | 293.36 |
| 1963.5 | 19.60 | 15.78 | 52.50 | 45.10 | 0.50 | 0.30 | 47.60 | 44.50 | 0.08 | 0.07 | 294.23 | 293.76 |
| 1964.5 | 23.72 | 19.20 | 60.40 | 51.80 | 0.80 | 0.50 | 49.40 | 46.10 | 0.09 | 0.08 | 294.65 | 294.17 |
| 1965.5 | 28.44 | 23.12 | 69.30 | 59.50 | 1.10 | 0.80 | 50.90 | 47.70 | 0.11 | 0.10 | 295.08 | 294.59 |
| 1966.5 | 33.67 | 27.64 | 79.20 | 68.20 | 1.49 | 1.10 | 53.00 | 49.30 | 0.13 | 0.12 | 295.52 | 295.02 |
| 1967.5 | 39.40 | 32.66 | 90.30 | 77.90 | 1.99 | 1.49 | 55.80 | 51.40 | 0.15 | 0.14 | 295.96 | 295.45 |
| 1968.5 | 46.03 | 38.29 | 102.80 | 88.80 | 2.69 | 1.99 | 59.10 | 54.10 | 0.18 | 0.17 | 296.41 | 295.89 |
| 1969.5 | 53.77 | 44.82 | 116.80 | 101.10 | 3.39 | 2.59 | 63.40 | 57.40 | 0.21 | 0.19 | 296.86 | 296.34 |
| 1970.5 | 62.41 | 52.26 | 132.00 | 114.70 | 4.18 | 3.29 | 69.30 | 61.70 | 0.23 | 0.22 | 297.33 | 296.79 |
| 1971.5 | 72.06 | 60.70 | 148.40 | 129.60 | 5.18 | 4.08 | 74.90 | 67.00 | 0.26 | 0.24 | 297.80 | 297.26 |
| 1972.5 | 82.71 | 69.95 | 166.10 | 145.70 | 6.27 | 5.08 | 77.60 | 71.40 | 0.30 | 0.28 | 298.28 | 297.73 |
| 1973.5 | 94.87 | 80.40 | 185.80 | 163.30 | 7.47 | 6.18 | 79.70 | 74.30 | 0.34 | 0.31 | 298.77 | 298.21 |
| 1974.5 | 108.34 | 92.16 | 207.10 | 182.50 | 8.96 | 7.37 | 83.20 | 77.20 | 0.38 | 0.35 | 299.26 | 298.69 |
| 1975.5 | 121.41 | 104.72 | 228.20 | 202.90 | 10.66 | 8.76 | 85.20 | 80.00 | 0.44 | 0.40 | 299.77 | 299.19 |
| 1976.5 | 133.97 | 117.09 | 248.10 | 223.20 | 12.45 | 10.36 | 87.00 | 82.10 | 0.50 | 0.46 | 300.28 | 299.69 |
| 1977.5 | 145.93 | 129.35 | 266.90 | 242.70 | 14.64 | 12.25 | 89.80 | 84.40 | 0.58 | 0.53 | 300.80 | 300.20 |
| 1978.5 | 156.58 | 140.80 | 284.30 | 261.20 | 16.93 | 14.34 | 91.90 | 86.70 | 0.66 | 0.61 | 301.33 | 300.72 |
| 1979.5 | 168.34 | 148.74 | 306.10 | 273.50 | 19.62 | 16.63 | 93.30 | 88.60 | 0.76 | 0.70 | 301.87 | 301.25 |
| 1980.5 | 176.68 | 159.30 | 323.20 | 292.30 | 22.61 | 19.32 | 94.90 | 89.60 | 0.88 | 0.81 | 302.42 | 301.79 |
| 1981.5 | 184.32 | 167.84 | 339.60 | 308.80 | 25.90 | 22.21 | 96.40 | 90.80 | 1.00 | 0.93 | 302.98 | 302.33 |
| 1982.5 | 191.46 | 176.08 | 353.40 | 325.50 | 29.18 | 25.30 | 97.50 | 92.30 | 1.13 | 1.04 | 303.55 | 302.89 |
| 1983.5 | 199.30 | 184.52 | 369.00 | 342.60 | 32.97 | 28.09 | 98.50 | 93.50 | 1.27 | 1.17 | 304.12 | 303.46 |
| 1984.5 | 208.04 | 192.46 | 385.70 | 359.40 | 37.85 | 31.37 | 99.80 | 95.10 | 1.40 | 1.29 | 304.71 | 304.03 |
| 1985.5 | 217.99 | 202.01 | 403.40 | 378.20 | 43.92 | 35.96 | 100.50 | 96.60 | 1.55 | 1.43 | 305.30 | 304.62 |
| 1986.5 | 229.35 | 211.36 | 424.30 | 396.50 | 48.31 | 40.94 | 101.90 | 98.20 | 1.71 | 1.58 | 305.91 | 305.21 |
| 1987.5 | 241.61 | 222.21 | 444.00 | 416.30 | 55.68 | 47.01 | 102.50 | 100.00 | 1.88 | 1.73 | 306.53 | 305.82 |
| 1988.5 | 252.86 | 233.27 | 465.40 | 435.80 | 63.55 | 53.29 | 103.50 | 100.60 | 2.05 | 1.89 | 307.15 | 306.43 |
| 1989.5 | 259.30 | 242.11 | 483.60 | 454.40 | 69.72 | 59.66 | 104.40 | 101.10 | 2.22 | 2.05 | 307.79 | 307.05 |
| 1990.5 | 265.83 | 251.06 | 497.70 | 472.70 | 75.60 | 66.14 | 104.90 | 102.30 | 2.41 | 2.22 | 308.44 | 307.69 |
| 1991.5 | 268.24 | 256.68 | 506.00 | 487.30 | 80.98 | 71.31 | 105.50 | 102.50 | 2.62 | 2.42 | 309.10 | 308.34 |
| 1992.5 | 268.14 | 260.80 | 516.30 | 498.30 | 83.96 | 77.19 | 104.90 | 101.90 | 2.85 | 2.63 | 309.77 | 308.99 |
| 1993.5 | 269.55 | 262.51 | 523.20 | 507.00 | 84.36 | 79.58 | 104.00 | 101.10 | 3.09 | 2.84 | 310.45 | 309.66 |
| 1994.5 | 269.65 | 263.72 | 528.50 | 514.80 | 84.46 | 81.27 | 103.00 | 100.30 | 3.33 | 3.07 | 311.14 | 310.34 |
| 1995.5 | 268.34 | 263.22 | 533.40 | 521.00 | 84.36 | 82.17 | 102.10 | 99.60 | 3.58 | 3.30 | 311.84 | 311.03 |
| 1996.5 | 266.93 | 262.91 | 537.30 | 526.50 | 84.06 | 82.67 | 101.10 | 98.60 | 3.86 | 3.55 | 312.56 | 311.73 |
| 1997.5 | 265.73 | 262.01 | 540.10 | 530.80 | 83.57 | 82.67 | 100.20 | 98.00 | 4.07 | 3.81 | 313.29 | 312.45 |
| 1998.5 | 264.52 | 261.01 | 542.90 | 534.30 | 83.17 | 82.47 | 99.20 | 97.00 | 4.25 | 4.01 | 314.03 | 313.17 |
| 1999.5 | 263.12 | 259.90 | 544.40 | 537.20 | 82.47 | 81.97 | 98.20 | 96.20 | 4.48 | 4.25 | 314.78 | 313.91 |
| 2000.5 | 261.71 | 258.29 | 545.90 | 539.00 | 81.87 | 81.37 | 97.30 | 95.40 | 4.68 | 4.46 | 315.54 | 314.66 |
| 2001.5 | 260.00 | 256.98 | 546.50 | 540.60 | 81.18 | 80.78 | 96.30 | 94.40 | 4.90 | 4.65 | 316.32 | 315.42 |
| 2002.5 | 258.19 | 255.08 | 546.70 | 541.30 | 80.48 | 79.98 | 95.30 | 93.60 | 5.14 | 4.88 | 317.11 | 316.20 |
| 2003.5 | 256.18 | 253.27 | 546.70 | 541.60 | 79.88 | 79.38 | 94.30 | 92.50 | 5.37 | 5.07 | 317.91 | 316.99 |
| 2004.5 | 253.97 | 251.36 | 545.70 | 541.50 | 79.08 | 78.78 | 93.30 | 91.70 | 5.58 | 5.30 | 318.73 | 317.79 |
| 2005.5 | 251.96 | 249.15 | 544.90 | 540.70 | 78.49 | 78.09 | 92.40 | 90.80 | 5.80 | 5.51 | 319.56 | 318.60 |
| 2006.5 | 249.55 | 247.34 | 543.10 | 539.80 | 77.69 | 77.59 | 91.30 | 89.70 | 6.04 | 5.75 | 320.41 | 319.43 |
| 2007.5 | 247.54 | 245.03 | 541.10 | 538.10 | 76.99 | 76.79 | 90.40 | 88.90 | 6.33 | 6.03 | 321.26 | 320.28 |
| 2008.5 | 245.63 | 243.12 | 538.60 | 536.20 | 76.29 | 76.20 | 89.30 | 87.70 | 6.62 | 6.29 | 322.14 | 321.13 |
| 2009.5 | 243.61 | 241.05 | 536.12 | 533.47 | 75.82 | 75.47 | 87.61 | 85.95 | 6.89 | 6.58 | 323.02 | 322.00 |
| 2010.5 | 241.31 | 239.15 | 533.26 | 531.03 | 75.01 | 74.79 | 86.57 | 85.14 | 7.21 | 6.87 | 323.93 | 322.89 |
| 2011.5 | 239.40 | 236.84 | 530.60 | 528.53 | 74.35 | 74.05 | 85.43 | 83.78 | 7.46 | 7.17 | 324.84 | 323.79 |
| 2012.5 | 236.89 | 234.77 | 527.20 | 526.00 | 73.66 | 73.39 | 84.34 | 82.82 | 7.73 | 7.43 | 325.78 | 324.71 |
| 2013.5 | 235.57 | 232.88 | 525.22 | 523.25 | 72.94 | 72.81 | 83.27 | 81.60 | 8.09 | 7.73 | 326.73 | 325.64 |
| 2014.5 | 234.97 | 231.49 | 522.97 | 521.00 | 72.17 | 71.98 | 82.51 | 80.79 | 8.40 | 8.11 | 327.69 | 326.58 |
| 2015.5 | 234.36 | 230.09 | 520.71 | 518.74 | 71.41 | 71.15 | 81.76 | 79.99 | 8.72 | 8.50 | 328.67 | 327.55 |
| 2016.5 | 233.18 | 229.64 | 514.76 | 512.94 | 71.26 | 71.15 | 80.08 | 78.24 | 9.1 | 8.72 | 329.55 | 328.32 |
| 2017.5 | 232.3 | 228.58 | 511.08 | 509.63 | 70.69 | 70.53 | 79.19 | 77.11 | 9.44 | 9.06 | 330.32 | 329.18 |
| 2018.5 | 231.27 | 228.08 | 508.06 | 507.01 | 70.09 | 70.02 | 77.97 | 76.23 | 9.78 | 9.42 | 331.35 | 330.38 |
| 2019.5 | 229.33 | 226.51 | 503.82 | 502.69 | 69.4 | 69.36 | 76.97 | 75.62 | 10.12 | 9.76 | 332.34 | 331.37 |
| 2020.5 | 226.58 | 224.24 | 499.81 | 498.39 | 68.77 | 68.68 | 75.73 | 74.5 | 10.44 | 10.08 | 333.71 | 332.4 |
| 2021.5 | 224.01 | 222.19 | 495.61 | 494.81 | 68.14 | 68.1 | 74.61 | 73.5 | 10.84 | 10.44 | 334.85 | 333.82 |
| 2022.5 | 221.71 | 220.08 | 491.93 | 491.46 | 67.56 | 67.58 | 73.23 | 72.58 | 11.23 | 10.82 | 336.15 | 335.27 |
Graphics
Figure 1. Mean mid-year tropospheric CFC-11, CFC-12, CFC-113, carbon tetrachloride (CCl4), sulfur hexafluoride (SF6) and nitrous oxide (N2O) concentrations in the northern (NH) hemisphere for the period 1765.5 to 2015.5 The concentrations are expressed as the mixing ratio (mole fraction) of the trace gas in dry air and are reported in parts-per-trillion (ppt) for CFC-11, CFC-12, CFC-113, CCl4, SF6 and as parts-per-billion (ppb) for N2O.
Figure 2. Mean mid-year tropospheric CFC-11, CFC-12, CFC-113, carbon tetrachloride (CCl4), sulfur hexafluoride (SF6) and nitrous oxide (N2O) concentrations in the southern (SH) hemisphere for the period 1765.5 to 2015.5 The concentrations are expressed as the mixing ratio (mole fraction) of the trace gas in dry air and are reported in parts-per-trillion (ppt) for CFC-11, CFC-12, CFC-113, CCl4, SF6 and as parts-per-billion (ppb) for N2O.
Figure 3. Mean mid-year tropospheric CFC-11, CFC-12, CFC-113, carbon tetrachloride (CCl4), sulfur hexafluoride (SF6) and nitrous oxide (N2O) concentrations in the northern (NH) hemisphere for the period 1920.5 to 2015.5 The concentrations are expressed as the mixing ratio (mole fraction) of the trace gas in dry air and are reported in parts-per-trillion (ppt) for CFC-11, CFC-12, CFC-113, CCl4, SF6 and as parts-per-billion (ppb) for N2O.
Figure 4. Mean mid-year tropospheric CFC-11, CFC-12, CFC-113, carbon tetrachloride (CCl4), sulfur hexafluoride (SF6) and nitrous oxide (N2O) concentrations in the southern (SH) hemisphere for the period 1920.5 to 2015.5 The concentrations are expressed as the mixing ratio (mole fraction) of the trace gas in dry air and are reported in parts-per-trillion (ppt) for CFC-11, CFC-12, CFC-113, CCl4, SF6 and as parts-per-billion (ppb) for N2O.
Figure 5. Mean mid-year tropospheric CFC-11, CFC-12, CFC-113, carbon tetrachloride (CCl4) and sulfur hexafluoride (SF6) concentrations in the northern (NH) hemisphere for the period 1920.5 to 2015.5 The concentrations are expressed as the mixing ratio (mole fraction) of the trace gas in dry air and are reported in parts-per-trillion (ppt).
Figure 6. Mean mid-year tropospheric CFC-11, CFC-12, CFC-113, carbon tetrachloride (CCl4) and sulfur hexafluoride (SF6) concentrations in the southern (SH) hemisphere for the period 1920.5 to 2015.5 The concentrations are expressed as the mixing ratio (mole fraction) of the trace gas in dry air and are reported in parts-per-trillion (ppt).
Figure 7. Mean mid-year tropospheric CFC-11, CFC-12 and sulfur hexafluoride (SF6) concentrations in the northern (NH) hemisphere for the period 1920.5 to 2015.5 The concentrations are expressed as the mixing ratio (mole fraction) of the trace gas in dry air and are reported in parts-per-trillion (ppt).
Figure 8. Mean mid-year tropospheric CFC-11, CFC-12 and sulfur hexafluoride (SF6) concentrations in the southern (SH) hemisphere for the period 1920.5 to 2015.5 The concentrations are expressed as the mixing ratio (mole fraction) of the trace gas in dry air and are reported in parts-per-trillion (ppt).
Figure 9. Mean mid-year tropospheric CFC-11, CFC-12, CFC-113, carbon tetrachloride (CCl4), sulfur hexafluoride (SF6) concentrations in the northern (NH) and southern (SH) hemispheres for the period 1920.5 to 2015.5 The concentrations are expressed as the mixing ratio (mole fraction) of the trace gas in dry air and are reported in parts-per-trillion (ppt).
Figure 10. Fit of Macfarling Muere et al. (2006) ice core data (1502-1996) and CMDL monthly mean northern hemisphere (NH) air measurements (1977-2015) for N2O. Mid-year mean NH N2O concentrations for the period 1855-2015 are calculated directly from this fit and reported in Table 1. Mid-year NH N2O concentrations in Table 1 prior to 1855 are reported as the mean of the NH and SH fitted concentration values for those years.
Figure 11. Fit of MacFarling Muere et al. (2006) ice core data (1502-1996) and CMDL monthly mean southern hemisphere (SH) air measurements (1977-2015) for N2O. Mid-year mean SH N2O concentrations for the period 1855-2015 are calculated directly from this fit and reported in Table 1. Mid-year SH N2O concentrations in Table 1 prior to 1855 are reported as the mean of the NH and SH fitted concentration values for those years.
References
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Last modified: 2023-07-27T15:00:22Z
