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 Organization

NO 2
Acronym NOAA
Name Earth System Research Laboratory, NOAA
Address 1 R/GMD1
Address 2 NOAA/ESRL
Address 3 325 Broadway Boulder, CO 80305-3337
Country/Territory United States of America
Website https://www.esrl.noaa.gov/gmd/index.html

 Contact(s)

Name J. David Nance
Prefix
Email David.Nance@noaa.gov
Organization No 2
Organization acronym NOAA
Organization name Earth System Research Laboratory, NOAA
Organization country/territory United States of America
Address 1
Address 2
Address 3
Country/territory United States of America
Tel (303) 497-7002
Fax (303) 497-6290
Last updated date 2019-08-06


Name James W. Elkins
Prefix Dr.
Email James.W.Elkins@noaa.gov
Organization No 2
Organization acronym NOAA
Organization name Earth System Research Laboratory, NOAA
Organization country/territory United States of America
Address 1
Address 2
Address 3
Country/territory United States of America
Tel (303) 497-6224
Fax (303) 497-6290
Last updated date 2019-09-18


Name Bradley D. Hall
Prefix Dr.
Email Bradley.Hall@noaa.gov
Organization No 2
Organization acronym NOAA
Organization name Earth System Research Laboratory, NOAA
Organization country/territory United States of America
Address 1
Address 2
Address 3
Country/territory United States of America
Tel (303) 497-7011
Fax (303) 497-6290
Last updated date 2019-09-18


Name Debra J. Mondeel
Prefix
Email Debra.J.Mondeel@noaa.gov
Organization No 2
Organization acronym NOAA
Organization name Earth System Research Laboratory, NOAA
Organization country/territory United States of America
Address 1
Address 2
Address 3
Country/territory United States of America
Tel (303) 497-6013
Fax (303) 497-6290
Last updated date 2019-08-06


 Background observation
 UTC
 ppb
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: WMO N2O X2006A
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: Unknown(Gas chromatography (ECD))
 weekly
 See http://www.esrl.noaa.gov/gmd/ccl/scales.html for more information about calibration scales.
 A known, systematic, low-side bias in the N2O measurements performed on Otto has largely been eliminated since January of 2009. Prior to this date, offsets are added to these flask data for the purpose of combining them with baseline N2O data from other monitoring systems (see http://www.esrl.noaa.gov/gmd/hats/combined/N2O.html). The offsets -- 1.3 ppb at Samoa and 0.6 ppb elsewhere --were determined in reference to CATS data (http://www.esrl.noaa.gov/gmd/hats/insitu/cats) but have not been applied to the Otto data reported here. These data represent mean estimates from pairs of concurrently-collected flask samples based on several injections from each flask. Mean estimates are derived for each individual flask, then the flask estimates are combined into a single estimate for the pair. Ideally, each concentration is estimated three different ways using three simple calibration curves. A two-point calibration is derived from nearby responses to both reference gases considered in unison, and separate one-point calibrations are derived from nearby responses to each reference gas considered in isolation from the other. These estimates are then reconciled in accordance with the method outlined at ftp://aftp.cmdl.noaa.gov/data/hats/doc/HATSflaskECDanalysis.docx
 [Hourly]
 [Daily]
 [Monthly] These data represent monthly mean estimates computed using those data marked with a 0 in flag column 7 of the companion file. With flask samples collected only weekly on average, monthly sampling statistics are poor at best. As a result, the error reported is either the standard deviation of the mean or a floor single-sample precision estimate.
 flag1 0: normal (this also applies to all flags that follow)
1: a single reference gas was used for calibration
flag2 1: one or more sample injections occurred at subambient pressure
flag3 1: precision > 2.5% of estimated concentration
flag4 1: marked suspect by a loess-based statistical outlier algorithm
flag5 1: single flask with missing paired partner
flag6 1: paired partners disagree by more than twice their summed precisions
flag7 1: sample excluded from monthly mean computations
 Operational/Reporting
 value in the value_unc column means standard deviation of the mean (or single-sample precision value)
No data available