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International Polar Year 2007–2008 - WMO

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Chemistry and Physics (www.atmos-chem-phys.net/<br />

special_issue182.html) and elsewhere. A substantial<br />

finding was the large influence of both agricultural<br />

and forest fires on the aerosol load of the Arctic<br />

atmosphere. Already in spring 2008, fires in Kazakhstan<br />

and Russia were a major source of Arctic aerosols, even<br />

over Alaska. In summer, extensive influence of burning<br />

was obvious, too, especially at higher levels in the<br />

Arctic atmosphere.<br />

References<br />

Ångström, A., 1964. The parameters of atmospheric<br />

turbidity. Tellus, 16: 64-75.<br />

Bodhaine, B.A. and E.G. Dutton, 1993. A long term<br />

decrease in Arctic haze at Barrow, Alaska.<br />

Geophys. Res. Lett., 20:947-950.<br />

Bouchard, A., F. Rabier, V. Guidard and F. Karbou, in<br />

press. Enhancements of satellite data assimilation<br />

over Antarctica, Monthly Weather Review.<br />

Bromwich, D., Y.-H. Kuo, M. Serreze, J. Walsh, L.S. Bai, M.<br />

Barlage, K. Hines and A. Slater. 2010. Arctic System<br />

Reanalysis: Call for community involvement. EOS<br />

Trans. AGU, 91, 13-14.<br />

David C., P. Keckhut, A. Armetta, J. Jumelet, M.<br />

Marchand and and S. Bekki, 2009. Radiosondes<br />

Stratospheric Temperatures from 1957 to 2008<br />

at Dumont d’Urville (Antarctica): trends and link<br />

with <strong>Polar</strong> Stratospheric Clouds. Atmos. Chem.<br />

Phys. Discuss., 9:25687-25722.<br />

Farahani, E. et al., 2009. Features of the Arctic<br />

stratosphere during IPY. SPARC Newsletter, 33.<br />

Guedj, S., F. Karbou, F. Rabier and A. Bouchard,<br />

2010. Towards a better modeling of surface<br />

emissivity to improve AMSU data assimilation<br />

over Antarctica. IEEE Trans. in Geosc. and Remote<br />

Fig. 2.1-12. The NASA<br />

DC8 research aircraft<br />

viewed from the<br />

DLR Falcon research<br />

aircraft during an<br />

intercomparison<br />

flight over Greenland<br />

as part of POLARCAT<br />

in summer 2008<br />

(Photo: Hans Schlager,<br />

DLR).<br />

s C I e n C e P r o g r a m 153

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