Methane and nitrous oxide emissions in The Netherlands: ambient measurements support the national inventories Centre for Isotope Research, University of Groningen, Groningen, The Netherlands
Received: 14 May 2009 – Published in Atmos. Chem. Phys. Discuss.: 11 Sep 2009Abstract. We present net emission estimates of CH4 and N2O of The
Netherlands based on measurements conducted during the period of May 2006 to
April 2009 at station Lutjewad, The Netherlands (6°21' E,
53°24' N, 1 m a.s.l.). 222Radon mixing ratios were applied as an indicator
for vertical mixing and long-range air mass transport and used to calculate
the net surface fluxes from atmospheric mixing ratios of CH4 and
N2O. Our study shows that our measurement site Lutjewad is well-suited
to measure emissions from The Netherlands and validation of the national
inventories using the 222Radon flux method. Since this study is purely
observation-based it is independent from inventories or atmospheric models.
Our results are compared to the national inventories as reported to the
UNFCCC. We found net emissions of: (15.2±5.3) t km−2 a−1 for
CH4 and (0.9±0.3) t km−2 a−1 for N2O. These values
are lower than the inventory-based emissions (2006-2008 averages) of
(18.3±3.3) t km−2 a−1 for CH4, and
(1.3±0.6) t km−2 a−1 for N2O, but
the differences are insignificant.
Revised: 19 Nov 2009 – Accepted: 30 Nov 2009 – Published: 15 Dec 2009
Citation: van der Laan, S., Neubert, R. E. M., and Meijer, H. A. J.: Methane and nitrous oxide emissions in The Netherlands: ambient measurements support the national inventories, Atmos. Chem. Phys., 9, 9369-9379, doi:10.5194/acp-9-9369-2009, 2009.