InGOS – an integrating activity preparing for improved Greenhouse Gases monitoring over Europe
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Transcript of InGOS – an integrating activity preparing for improved Greenhouse Gases monitoring over Europe
InGOS – an integrating activity preparing for improved
Greenhouse Gases monitoring over Europe
Ingeborg Levin, Samuel Hammer, Dominik Schmithüsen, Ute Karstens, Frank Meinhardt, Martina Schmidt,
Peter Bergamaschi, Sanam Vardag and Alex Vermeulen
Topics discussed today
• Evaluation, correction and error estimates of „historical“ GHGs data in Europe
• Harmonisation of current and future non-CO2 GHGs observations, including Quality Assurance and Quality Control
• Travelling instrument comparisons (N2O, CH4, 222Radon etc.)
• 222Radon soil exhalation map for atmospheric transport model validation
Continuous CH4 observations in Europe that started before 2000
1994
1993
1996
19961991
Voyekovo: 1998
1996
Continuous N2O observations in Europe that started before 2005
1994
2004
1996
2001
Pallas: 2004
2001
N2O mole fractions over Europe: average of May 2007 from TM5
N2O mole fractions from TM5-4DVAR (Corazza et al., ACP 2011)average of 5 lowermost model layers (between surface and ~1 km height)
N2O mole fractions over Europe: Synoptic variations from TM5
N2O mole fractions from TM5-4DVAR (Corazza et al., ACP 2011)average of 5 lowermost model layers (between surface and ~1 km height)
N2O mole fractions over Europe: average of May 2007 from TM5
N2O mole fractions from TM5-4DVAR (Corazza et al., ACP 2011)average of 5 lowermost model layers (between surface and ~1 km height)
→ WMO/GAW interlaboratory compatibility target for N2O = ±0.1 ppb
Topics discussed today
• Evaluation, correction and error estimates of „historical“ GHGs data in Europe
• Harmonisation of non-CO2 GHGs observations, including Quality Assurance and Control
• Travelling instrument comparisons (N2O, CH4, 222Radon etc.)
• 222Radon soil exhalation map for atmospheric transport model validation
Continuous N2O observations at Schauinsland station before and after
correction
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
before
after
Error assessment• Measurement errors:
– repeatability ∆repeat
– reproducibility ∆reprod
– lab-internal scale consistency ∆sc_consist
– calibration and non-linearity ∆cal_non_lin
• Sampling errors:– artifacts from pumps– problems with air drying– leaks in the sampling line– …
Error estimates: CH4 in Heidelberg
from target gas
from working standard
from target gas
Error assessment• Measurement errors:
– repeatability ∆repeat
– reproducibility ∆reprod
– lab-internal scale consistency ∆sc_consist
– calibration and non-linearity ∆cal_non_lin
Systematic error
Statistical error
• Each error will be reported separately
Topics discussed today
• Evaluation, correction and error estimates of „historical“ GHGs data in Europe
• Harmonisation of non-CO2 GHGs observations, including Quality Assurance and Control
• Travelling instrument comparisons (N2O, CH4, 222Radon etc.)
• 222Radon soil exhalation map for atmospheric transport model validation
Harmonisation of future continuous GHG observations
• Introduction of Quality Assurance measures– Measurement guidelines
– Central Analytical Lab for working standard production and calibration
– Monitoring of instrument parameters
– …
• Introduction of comprehensive quality control measures– Target/Surveillance tanks
– Flask – in situ comparisons
– Round-Robin comparison
– Comparison with „Travelling Instrumentation“
Topics discussed today
• Evaluation, correction and error estimates of „historical“ GHGs data in Europe
• Harmonisation of non-CO2 GHGs observations, including Quality Assurance and Control
• Travelling instrument comparisons (N2O, CH4, 222Radon etc.)
• 222Radon soil exhalation map for atmospheric transport model validation
FTIR spectrometer as travelling comparison instrument (TCI)
at Mace Head for N2O
N2O comparison at Mace Head(March – April 2013)
Reason for the difference: Mainly errors in scale transfer to Working Gases
N2O mole fractions over Europe: average of May 2007 from TM5
N2O mole fractions from TM5-4DVAR (Corazza et al., ACP 2011)average of 5 lowermost model layers (between surface and ~1 km height)
Topics discussed today
• Evaluation, correction and error estimates of „historical“ GHGs data in Europe
• Harmonisation of non-CO2 GHGs observations, including Quality Assurance and Control
• Travelling instrument comparisons (N2O, CH4, 222Radon etc.)
• 222Radon soil exhalation map for atmospheric transport model validation
Development of a 222Radon flux map
Basic input parameters:- 226Radium content of soils- Diffusion model based on soil texture and moisture- Soil moisture based on Climate Land Surface models
January July
Development of a 222Radon flux map:validation with flux observations
(multi-annual months repeated)
using Noah soil moist.using ERA-I/L soil moist.Measurements
using Noah soil moist.using ERA-I/L soil moist.Measurements
Measurements: Binningen: Szegvary et al. (2006)M5 Nussloch: Jutzi (2001)Gebesee: Schell (2004)Pallas: Lallo et al. (2009)
Soil moisture reanalysis: GLDAS Noah LSMERA-Interim/Land
First comparison of atmospheric 222Radon: Model estimates vs.
observations
Measurements provided by A. Vermeulen, ECN (Cabauw) and M. Schmidt, LSCE (Gif) TM5 transport model simulations provided by E. Koffi and P. Bergamaschi, JRC
Summary
• A set of corrected atmospheric CH4, N2O and H2 observations will soon be available for European flux inversions
• A first attempt is made to also determine and report uncertainty of these observations
• The Travelling Comparison Instrument approach was shown to be successful, also for N2O (besides CO2 and CH4)
• A new process-based 222Radon soil flux map was developed as input for validation of atmospheric transport models
Thank you,
and the European Commission’s
for supporting these activities