Hoheisel, Antje: Comparison of atmospheric CO, CO₂ and CH₄ measurements at Schneefernerhaus and the mountain ridge at Zugspitze, Germany
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ICOS Science Conference, Session 2
![antje.hoheisel@iup.uni-heidelberg.de
Comparison of atmospheric CO2, CO and CH4 measurements at
Schneefernerhaus and the mountain ridge at Zugspitze
A. Hoheisel1, C. Couret2, B. Hellack2 and M. Schmidt1
[1] Institute of Environmental Physics Heidelberg University
[2] German Environment Agency UBA, Germany
September 15, 2020
ICOS Science Conference 2020 September 15, 2020 1 / 16](https://image.slidesharecdn.com/hoheiselantjesession2-201115221530/85/Hoheisel-Antje-Comparison-of-atmospheric-CO-CO-and-CH-measurements-at-Schneefernerhaus-and-the-mountain-ridge-at-Zugspitze-Germany-1-320.jpg)
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Hoheisel, Antje: Comparison of atmospheric CO, CO₂ and CH₄ measurements at Schneefernerhaus and the mountain ridge at Zugspitze, Germany
- 1. antje.hoheisel@iup.uni-heidelberg.de Comparison of atmospheric CO2, CO and CH4 measurements at Schneefernerhaus and the mountain ridge at Zugspitze A. Hoheisel1, C. Couret2, B. Hellack2 and M. Schmidt1 [1] Institute of Environmental Physics Heidelberg University [2] German Environment Agency UBA, Germany September 15, 2020 ICOS Science Conference 2020 September 15, 2020 1 / 16
- 2. Motivation Measurement site ICOS Science Conference 2020 September 15, 2020 2 / 16
- 3. Motivation Motivation: 1. local pollution spikes in CO and CO2 390 400 410 420 430 440 CO2[ppm] Oct 18 Dec 18 Feb 19 Apr 19 Jun 19 Aug 19 Oct 19 Dec 19 max: 483 ppm 200 400 600 800 CO[ppb] Schneefernerhaus (ZSF) with local pollution Schneefernerhaus (ZSF) flagged data ICOS Science Conference 2020 September 15, 2020 3 / 16
- 4. Motivation Motivation: 2. weekend effect in Schneefernerhaus data ICOS Science Conference 2020 September 15, 2020 4 / 16
- 5. Motivation New inlet line to mountain ridge since October 2018 Schneefernerhaus: ˆ CH4 und CO2: CRDS G2301 ˆ CO: LGR ˆ dried using a cooling trap mountain ridge: ˆ CH4, CO2 und CO: CRDS G2401 ˆ dried since Feb 2019 using a cooling trap ICOS Science Conference 2020 September 15, 2020 5 / 16
- 6. Time series CO mole fraction in ambient air (1min data) 200 400 600 800 CO[ppb] dry ZSF measurement dry ZSF and mountain ridge measurement no tourism −50 0 50 100 ∆CO(ZSF−mountainridge)[ppb] Oct 18 Dec 18 Feb 19 Apr 19 Jun 19 Aug 19 Oct 19 Dec 19 Feb 20 Apr 20 Jun 20 Aug 20 mean: 1.615 ± 0.005 ppb std deviation: 2.8 ppb month max: 27987 ppb Analyser at ATC Schneefernerhaus (ZSF) with pollution Schneefernerhaus (ZSF) without pollution mountain ridge (ZMR) Analyser at ATC ICOS Science Conference 2020 September 15, 2020 6 / 16
- 7. Time series CO2 mole fraction in ambient air (1min data) 390 400 410 420 430 440 450 460 CO2[ppm] Schneefernerhaus (ZSF) with pollution Schneefernerhaus (ZSF) without pollution mountain ridge (ZMR) dry ZSF measurement dry ZSF and mountain ridge measurement no tourism −10 −5 0 5 10 15 20 ∆CO2(ZSF−mountainridge)[ppm] Oct 18 Dec 18 Feb 19 Apr 19 Jun 19 Aug 19 Oct 19 Dec 19 Feb 20 Apr 20 Jun 20 Aug 20 mean: 0.066 ± 0.001 ppm std deviation: 0.5 ppm month max: 71 ppm Analyser at ATC ICOS Science Conference 2020 September 15, 2020 7 / 16
- 8. Time series Local pollution events at Schneefernerhaus and mountain ridge 406.5 407.0 407.5 408.0 datenW$date datenW[,c(15+w)] CO2[ppm] C CO2 measurement 406.5 407.0 407.5 408.0 datenW$date datenW[,c(15+w)] CO2ZSF[ppm] 15:00 17:00 19:00 21:00 406.4 406.5 406.6 406.7 406.8 406.9 datenW$date datenW[,c(24+w)] CO2ZMR[ppm] hours (UTC) 2018−10−15 200 400 600 800 1000 datenW$date datenW[,c(15+w)] CO[ppb] A CO measurement 200 400 600 800 1000 datenW$date datenW[,c(15+w)] COZSF[ppb] 12:00 14:00 16:00 18:00 94 96 98 100 102 104 106 datenW$date datenW[,c(24+w)] COZMR[ppb] hours (UTC) 2019−01−15 200 400 600 800 1000 1200 1400 datenW$date datenW[,c(15+w)] CO[ppb] B 200 400 600 800 1000 1200 1400 datenW$date datenW[,c(15+w)] COZSF[ppb] 09:00 11:00 13:00 95 100 105 datenW$date datenW[,c(24+w)] COZMR[ppb] hours (UTC) 2018−12−19 Schneeferner− haus (ZSF) mountain ridge (ZMR) c(4:7, 6:1, 2:4) c(7:1,2:7) wind direction N E S W ICOS Science Conference 2020 September 15, 2020 8 / 16
- 9. Time series Local pollution at Schneefernerhaus and mountain ridge CO pollution points: 12803 0 5 10 15 20 0 500 1000 1500 2000 hour (UTC) counts ZSF: 12803 ZMR: 499 0 5 10 15 20 0 100 200 300 400 500 600 CO SD spike detection hour (UTC) counts ZSF: 3527 ZMR: 157 CO2 pollution points: 17038 0 5 10 15 20 0 500 1000 1500 2000 hour (UTC) counts ZSF: 17038 ZMR: 200 0 5 10 15 20 0 20 40 60 80 100 120 CO2 SD spike detection hour (UTC) counts ZSF: 886 ZMR: 291 NA NA 1 10 100 1000 10000 1e+05 ∆CO2 (ZSF−ZMR)with pollution [ppm] −10 10 30 50 70 counts night: 18−6 (UTC) day: 6−18 (UTC) NANA 1 10 100 1000 10000 1e+05 ∆CO(ZSF−ZMR)with pollution [ppb] −100 100 300 500 700 counts NA NA 1 10 100 1000 10000 1e+05 ∆CO2 (ZSF−ZMR)without pollution [ppm] −10 10 30 50 70 counts NA NA 1 10 100 1000 10000 1e+05 ∆CO(ZSF−ZMR)without pollution [ppb] −100 100 300 500 700 counts ICOS Science Conference 2020 September 15, 2020 9 / 16
- 10. Time series Diurnal and annual cycle at Schneefernerhaus and mountain ridge datS[[h]]$hour datS[[h]]$CO2.ppm.min.with.Flag_TagMed −2.0 −1.5 −1.0 −0.5 0.0 0.5 1.0 1.5 CO2detrended[ppm] Jan, Feb, Mar datS[[h]]$hour datS[[h]]$CO2.ppm.min.with.Flag_TagMed Apr, Mai, Jun datS[[h]]$hour datS[[h]]$CO2.ppm.min.with.Flag_TagMed Jul, Aug, Sep datS[[h]]$hour datS[[h]]$CO2.ppm.min.with.Flag_TagMed mountain ridge (ZMR) ZSF without pollution ZSF with pollution Oct, Nov, Dec datS[[h]]$hour datS[[h]]$CO.ppb.min.with.Flag_TagMed −4 −2 0 2 4 6 −4 −2 0 2 4 6 COdetrended[ppb] datS[[h]]$hour datS[[h]]$CO.ppb.min.with.Flag_TagMed datS[[h]]$hour datS[[h]]$CO.ppb.min.with.Flag_TagMed datS[[h]]$hourdatS[[h]]$CO.ppb.min.with.Flag_TagMed datS[[h]]$hour datS[[h]]$CH4.ppb.min.with.Flag_TagMed −5 0 5 10 0 5 10 15 20 hour (UTC) −5 0 5 10 CH4detrended[ppb] datS[[h]]$hour datS[[h]]$CH4.ppb.min.with.Flag_TagMed 0 5 10 15 20 hour (UTC) datS[[h]]$hour datS[[h]]$CH4.ppb.min.with.Flag_TagMed 0 5 10 15 20 hour (UTC) datS[[h]]$hour datS[[h]]$CH4.ppb.min.with.Flag_TagMed 0 5 10 15 20 hour (UTC) 400 405 410 415 c(0, AllData_M0$month, 13) AllData_M0$CO2.ppm.min.ohne.Flag[c(12,1:12,1)] CO2[ppm] 80 100 120 140 160 c(0, AllData_M0$month, 13) AllData_M0$CO.ppb.min.ohne.Flag[c(12,1:12,1)] CO[ppb] 2 4 6 8 10 12 1900 1920 1940 1960 1980 c(0, AllData_M0$month, 13) AllData_M0$CH4.ppb.min.ohne.Flag[c(12,1:12,1)] CH4[ppb] month c(0, AllData_M0$month, 13) AllData_M0$DiffCO2_f_dry[c(12,1:12,1)] ∆CO2(ZSF−ZMR)[ppm] −0.2 −0.1 0.0 0.1 0.2 0.3 c(0, AllData_M0$month, 13) AllData_M0$DiffCO_f_dry[c(12,1:12,1)] ∆CO(ZSF−ZMR)[ppb] −1 0 1 2 3 c(0, AllData_M0$month, 13) AllData_M0$DiffCH4_f_dry[c(12,1:12,1)] ∆CH4(ZSF−ZMR)[ppb] −2 −1 0 1 2 month 2 4 6 8 10 12 ICOS Science Conference 2020 September 15, 2020 10 / 16
- 11. Time series Weekend Effect in Schneefernerhaus data −1.5 −1.0 −0.5 0.0 0.5 1.0 1.5 2.0 NA NA CO2detrended[ppm] ZSF: 2018−2020 winter weekend weekday NA NA ZMR: 2018−2020 winter (Oct to Apr) −1.5 −1.0 −0.5 0.0 0.5 1.0 1.5 2.0 NA NA CO2detrended[ppm] 0 5 10 15 20 hour (UTC) summer NA NA 0 5 10 15 20 hour (UTC) summer (May to Sep) ICOS Science Conference 2020 September 15, 2020 11 / 16
- 12. Time series Weekend Effect in Schneefernerhaus data −1.5 −1.0 −0.5 0.0 0.5 1.0 1.5 2.0 NA NA CO2detrended[ppm] ZSF: 2018−2020 winter weekend weekday NA NA ZMR: 2018−2020 winter (Oct to Apr) NA NA ZSF: 2002−2014 weekend weekday NA NA −1.5 −1.0 −0.5 0.0 0.5 1.0 1.5 2.0 ZSF: 2015−2019 winter (Oct to Apr) CO2detrended[ppm] −1.5 −1.0 −0.5 0.0 0.5 1.0 1.5 2.0 NA NA CO2detrended[ppm] 0 5 10 15 20 hour (UTC) summer NA NA 0 5 10 15 20 hour (UTC) summer (May to Sep) NA NA 0 5 10 15 20 hour (UTC) NA NA −1.5 −1.0 −0.5 0.0 0.5 1.0 1.5 2.0 0 5 10 15 20 hour (UTC) summer (May to Sep) CO2detrended[ppm] ICOS Science Conference 2020 September 15, 2020 11 / 16
- 13. Impact of COVID-19 lockdown Weekly averaged CO2, CH4 and CO mole fraction 405 410 415 CO2ZSF[ppm] Jan Mar May Jul Sep Nov Jan 2018 2019 2020 Schneefernerhaus 1910 1920 1930 1940 1950 1960 1970 CH4ZSF[ppb] 80 100 120 140 160 COZSF[ppb] Jan Mar May Jul Sep Nov Jan 405 410 415 CO2ZMR[ppm] Jan Mar May Jul Sep Nov Jan mountain ridge 1910 1920 1930 1940 1950 1960 1970 CH4ZMR[ppb] 80 100 120 140 160 COZMR[ppb] Jan Mar May Jul Sep Nov Jan ICOS Science Conference 2020 September 15, 2020 12 / 16
- 14. Impact of COVID-19 lockdown Difference between Schneefernerhaus and mountain ridge data −0.2 −0.1 0.0 0.1 0.2 0.3 ∆CO2[ppm] Jan Mar May Jul Sep Nov Jan 2018 2019 2020 −4 −3 −2 −1 0 1 ∆CH4[ppb] −1 0 1 2 3 ∆CO[ppb] Jan Mar May Jul Sep Nov Jan ICOS Science Conference 2020 September 15, 2020 13 / 16
- 15. Impact of COVID-19 lockdown Comparison between NO2 data measured 2019 and 2020 0.0 0.5 1.0 1.5 2.0 2.5 3.0 NO2[ppb] Feb 19 Mar 19 Apr 19 May 19 Jun 19 0.0 0.5 1.0 1.5 2.0 2.5 3.0 NO2[ppb] Feb 20 Mar 20 Apr 20 May 20 Jun 20 NA NA local pollution data 2020/2019: 3551 / 6320 = 56 % 1081 / 23437 = 5 % 5662 / 1700 = 333 % Schneefernerhaus without local pollution Schneefernerhaus with local pollution 20202019 ICOS Science Conference 2020 September 15, 2020 14 / 16
- 16. Impact of COVID-19 lockdown Comparison between CO2 data measured 2019 and 2020 405 410 415 420 425 430 435 440 CO2[ppm] Feb 19 Mar 19 Apr 19 May 19 Jun 19 Schneefernerhaus without local pollution Schneefernerhaus with local pollution 405 410 415 420 425 430 435 440 CO2[ppm] local pollution data 2020/2019: 699 / 2213 = 32 % 274 / 2765 = 10 % 353 / 955 = 37 % Feb 20 Mar 20 Apr 20 May 20 Jun 20 20202019 ICOS Science Conference 2020 September 15, 2020 15 / 16
- 17. Summary Summary Impact of Covid-19 lockdown ˆ No strong difference in the CO2 and CH4 mole fraction could be noticed. ˆ However, less local pollution events could be detected in CO2 and NO2. Comparison measurements between Schneefernerhaus(ZSF) and mountain ridge(ZMR) ˆ Ambient air from ZSF and ZMR show similar large scale patterns in CO2, CH4 and CO mole fractions. ˆ The mountain ridge measurement is much less influenced by local pollution. ˆ However, the inlet line to the mountain ridge is not always accessible depending on weather. ˆ Continuous measurements of ambient air from both locations (ZSF and ZMR) would give us several advantages. ICOS Science Conference 2020 September 15, 2020 16 / 16
- 18. Thank you for your attention. ICOS Science Conference 2020 September 15, 2020 16 / 16
- 19. Backup slides Experimental set-up CRDS G2401 CRDS G2301 LosGatos Ambient air intake line since 5.Feb 2019 Ambient air intake line Target PR Standard PR rotary valve pump since 16.July 2019 before 16.July 2019 since 16.July 2019 before 16.July 2019 mountain ridge Schneefernerhaus condensation trap condensation trap MFC MFC MFC overflow before 16.July 2019 MFC overflow before 16.July 2019 ICOS Science Conference 2020 September 15, 2020 16 / 16
- 20. Backup slides Wind pattern measured at ZSF and ZMR Schneefernerhaus mountain ridge Frequency of counts by wind direction (%) W S N E 5% 10% 15% 20% 25% 30% 35% mean = 3.5406 calm = 0 % wind spd. 0 to 2 2 to 4 4 to 6 6 to 16.4 Frequency of counts by wind direction (%) W S N E 5% 10% 15% 20% 25% 30% 35% mean = 3.9546 calm = 15.6 % wind spd. 0 to 2 2 to 4 4 to 6 6 to 19.98 ICOS Science Conference 2020 September 15, 2020 16 / 16
- 21. Backup slides CH4 mole fraction in ambient air (1min data) 1900 2000 2100 2200 2300 CH4[ppb] Schneefernerhaus (ZSF) with pollution Schneefernerhaus (ZSF) without pollution mountain ridge (ZMR) dry ZSF measurement dry ZSF and mountain ridge measurement no tourism −100 −50 0 50 100 ∆CH4(ZSF−mountainridge)[ppb] Oct 18 Dec 18 Feb 19 Apr 19 Jun 19 Aug 19 Oct 19 Dec 19 Feb 20 Apr 20 Jun 20 Aug 20 mean: −0.39 ± 0.01 ppb std deviation: 4 ppb month max: 361 ppb Analyser at ATC ICOS Science Conference 2020 September 15, 2020 16 / 16
- 22. Backup slides Weekly Cycle −0.6 −0.4 −0.2 0.0 0.2 0.4 0.6 (datV06$x−mean(datV06$x))[c(7,1:7,1)] 2002−2006: 378ppm 2007−2014: 392ppm 2015−2019: 408ppm So Mo Di Mi Do Fr Sa detrendedaveragedCO2[ppm] ICOS Science Conference 2020 September 15, 2020 16 / 16