pyFTSex/tutorial/darts/data/monthly_in_situ_co2_mlo.csv

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2	Atmospheric CO2 concentrations (ppm) derived from in situ air measurements
3	at Mauna Loa, Observatory, Hawaii: Latitude 19.5°N Longitude 155.6°W Elevation 3397m
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5	Source: R. F. Keeling, S. J. Walker, S. C. Piper and A. F. Bollenbacher
6	Scripps CO2 Program ( http://scrippsco2.ucsd.edu )
7	Scripps Institution of Oceanography (SIO)
8	University of California
9	La Jolla, California USA 92093-0244
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11	Status of data and correspondence:
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13	These data are subject to revision based on recalibration of standard gases. Questions
14	about the data should be directed to Dr. Ralph Keeling (rkeeling@ucsd.edu), Stephen Walker
15	(sjwalker@ucsd.edu) and Stephen Piper (scpiper@ucsd.edu), Scripps CO2 Program.
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17	Baseline data in this file through 10-Jan-2022 from archive dated 13-Jan-2022 08:51:33
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21	Please cite as:
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23	C. D. Keeling, S. C. Piper, R. B. Bacastow, M. Wahlen, T. P. Whorf, M. Heimann, and
24	H. A. Meijer, Exchanges of atmospheric CO2 and 13CO2 with the terrestrial biosphere and
25	oceans from 1978 to 2000. I. Global aspects, SIO Reference Series, No. 01-06, Scripps
26	Institution of Oceanography, San Diego, 88 pages, 2001.
27
28	If it is necessary to cite a peer-reviewed article, please cite as:
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30	C. D. Keeling, S. C. Piper, R. B. Bacastow, M. Wahlen, T. P. Whorf, M. Heimann, and
31	H. A. Meijer, Atmospheric CO2 and 13CO2 exchange with the terrestrial biosphere and
32	oceans from 1978 to 2000: observations and carbon cycle implications, pages 83-113,
33	editors, Ehleringer, J.R., T. E. Cerling, M. D. Dearing, Springer Verlag,
34	New York, 2005.
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38	The data file below contains 10 columns. Columns 1-4 give the dates in several redundant
39	formats. Column 5 below gives monthly Mauna Loa CO2 concentrations in micro-mol CO2 per
40	mole (ppm), reported on the 2012 SIO manometric mole fraction scale. This is the
41	standard version of the data most often sought. The monthly values have been adjusted
42	to 24:00 hours on the 15th of each month. Column 6 gives the same data after a seasonal
43	adjustment to remove the quasi-regular seasonal cycle. The adjustment involves
44	subtracting from the data a 4-harmonic fit with a linear gain factor. Column 7 is a
45	smoothed version of the data generated from a stiff cubic spline function plus 4-harmonic
46	functions with linear gain. Column 8 is the same smoothed version with the seasonal
47	cycle removed. Column 9 is identical to Column 5 except that the missing values from
48	Column 5 have been filled with values from Column 7. Column 10 is identical to Column 6
49	except missing values have been filled with values from Column 8. Missing values are
50	denoted by -99.99
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52	CO2 concentrations are measured on the '12' calibration scale
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