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| 
Mt. Kenya
-CO-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
|
| Description |
: |
flask |
| Sampling and analysis frequency |
: |
|
| Sampling environment |
: |
|
| Description for sampling analysis |
: |
|
| Instrument and Analysis |
| Measurement method |
: |
GC-HgO |
| Current status and history of instrument |
: |
GC-HgO |
| Description of instrument |
: |
|
| Calibration |
| Current scale employed in the measurement |
: |
WMO CO scale |
| Measurement calibration |
: |
|
| Scale and calibration(treasability) |
: |
WMO CO scale |
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
|
| Processing for averaging |
: |
|
| Data flag |
: |
NOAA ESRL uses a 3-column quality control flag where each column
is defined as follows:
column 1 REJECTION flag. An alphanumeric other
than a period (.) in the FIRST column indicates
a sample with obvious problems during collection
or analysis. This measurement should not be interpreted.
column 2 SELECTION flag. An alphanumeric other than a
period (.) in the SECOND column indicates a sample
that is likely valid but does not meet selection
criteria determined by the goals of a particular
investigation.
column 3 INFORMATION flag. An alphanumeric other than a period (.)
in the THIRD column provides additional information
about the collection or analysis of the sample.
WARNING: A "P" in the 3rd column of the QC flag indicates
the measurement result is preliminary and has not yet been
carefully examined by the PI. The "P" flag is removed once
the quality of the measurement has been determined.
Flag Description
RETAINED ... Accepted as a background air sample
..I sample has also been measured by
another lab as part of an
intercomparison experiment
..C mixing ratio falls outside of calibration
range (see Section 6).
..< first reference sample flagged
..> second reference sample flagged
SELECTED .X. determined as an outlier using a statistical
method
.N. flagged manually as an outlier
NOTE: Sites known to be heavily impacted
by regional pollution are not SELECTED
for background conditions. Among these
are BAL, BSC, HUN, OXK, OBN and TAP.
REJECTED *.. off-scale or broken flask
W.. flask type unacceptable for CO
Z.. one or more sample aliquots differ by
by 3 ppb or more
P.. flasks in a pair differ by 3 ppb or more
-.. starting 2011, low member of a bad pair
+.. starting 2011, high member of a bad pair
N.. sampling problem
A.. analytical problem
E.. sample collected as part of CCG experiment
S.. sample collected through an observatory CO2
analyzer
LLL This and more recent samples have not been
evaluated by the PI |
| Data remarks |
: |
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| Other Information |
| Scientific aim |
: |
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| Reference |
: |
Novelli, P.C. and K.A. Masarie (2013), Atmospheric Carbon Monoxide Dry Air Mole Fractions from the NOAA ESRL Carbon Cycle Cooperative Global Air Sampling Network, 1988-2012, Version: 2013-06-18,
Path: ftp://aftp.cmdl.noaa.gov/data/trace_gases/co/flask/surface/. |
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| submitted by Earth System Research Laboratory, NOAA |
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