TY - JOUR
T1 - A weekly cycle in atmospheric carbon dioxide
AU - Cerveny, Randall
AU - Coakley, Kevin J.
PY - 2002/1/15
Y1 - 2002/1/15
N2 - We present a new statistic called the "Mean Symmetrized Residual" (MSR) for detection and quantification of a weekly cycle in measured daily atmospheric carbon dioxide (CO2). At the Mauna Loa Observatory in Hawaii, we conclude that CO2 concentrations, on average, are significantly lower (0.022 parts per million by volume, ppmv) on weekends (Saturday-Sunday) than during the rest of the week. Over the past twenty-five years, the variation of the mean values of MSR (as a function of day of the week) has been relatively stable. We speculate that the observed weekday/weekend variation in CO2 at Mauna Loa is the result of anthropogenic emissions on Hawaii and nearby sources. We do not detect a weekly cycle in daily CO2 concentration measured at South Pole, Antarctica. This methodology has applicability to a variety of datasets.
AB - We present a new statistic called the "Mean Symmetrized Residual" (MSR) for detection and quantification of a weekly cycle in measured daily atmospheric carbon dioxide (CO2). At the Mauna Loa Observatory in Hawaii, we conclude that CO2 concentrations, on average, are significantly lower (0.022 parts per million by volume, ppmv) on weekends (Saturday-Sunday) than during the rest of the week. Over the past twenty-five years, the variation of the mean values of MSR (as a function of day of the week) has been relatively stable. We speculate that the observed weekday/weekend variation in CO2 at Mauna Loa is the result of anthropogenic emissions on Hawaii and nearby sources. We do not detect a weekly cycle in daily CO2 concentration measured at South Pole, Antarctica. This methodology has applicability to a variety of datasets.
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U2 - 10.1029/2001GL013952
DO - 10.1029/2001GL013952
M3 - Article
AN - SCOPUS:0037081941
SN - 0094-8276
VL - 29
SP - 15-1-15-4
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 2
ER -