Atmos. Chem. Phys. Discuss., 10, 8103-8134, 2010
www.atmos-chem-phys-discuss.net/10/8103/2010/
doi:10.5194/acpd-10-8103-2010
© Author(s) 2010. This work is distributed
under the Creative Commons Attribution 3.0 License.
Review Status
This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Assessing the regional surface influence through Backward Lagrangian Dispersion Models for aircraft CO2 vertical profiles observations in NE Spain
A. Font1,2, J.-A. Morguí1,2, and X. Rodó1,3
1Institut Català de Ciències del Clima, Dr. Trueta 203, 08005, Barcelona, Catalonia, Spain
2Laboratori de Recerca del Clima, Parc Científic de Barcelona, Universitat de Barcelona, Baldiri i Reixach, 4-6, Torre D, 08028, Barcelona, Catalonia, Spain
3Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys, 23, 08010, Barcelona, Catalonia, Spain

Abstract. A weekly climatology for 2006 composed of 96-h-backward Lagrangian Particle Dispersion simulations is presented for nine aircraft sites measuring vertical profiles of atmospheric CO2 mixing ratios along the 42° N parallel in NE Spain to assess the surface influence at a regional scale (102–103 km) at different altitudes in the vertical profile (600, 1200, 2500 and 4000 meters above the sea level, m a.s.l.). The Potential Surface Influence (PSI) area for the 96-h-backward simulations, defined as the air layer above ground with a thickness of 300 m, are reduced from the continental scale (~107 km2) to the watershed one (~104 km2), when a Residence Time Threshold Criteria (Rttc) greater than 500 s is imposed for each grid cell. In addition, this regional restricted information is confined during 50 h before the arrival for simulations centered at 600 and 1200 m a.s.l. At higher altitudes (2500 and 4000 m a.s.l.), the regional surface influence is only recovered during spring and summer months. For simulations centered at 600 and 1200 m a.s.l. sites separated by ~60 km may overlap 20–50% of the regional surface influences whereas sites separated by ~350 km as such do not overlap. The overlap for sites separated by ~60 km decreases to 8–40% at higher altitudes (2500 and 4000 m a.s.l.). A dense network of sampling sites below 2200 m a.s.l. (whether aircraft sites or tall tower ones) guarantees an appropriate regional coverage to properly assess the dynamics of the regional carbon cycle at a watershed scale (102–103 km length scale).

Citation: Font, A., Morguí, J.-A., and Rodó, X.: Assessing the regional surface influence through Backward Lagrangian Dispersion Models for aircraft CO2 vertical profiles observations in NE Spain, Atmos. Chem. Phys. Discuss., 10, 8103-8134, doi:10.5194/acpd-10-8103-2010, 2010.
 
Search ACPD
Discussion Paper
    XML
    Citation
    Final Revised Paper
    Share