Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2017, Vol. 14, No. 1, pp. 200-204
A model of microwave emission of Antarctic snow-firn layers
V.V. Tikhonov
1, 2 , M.D. Raev
1 , E.A. Sharkov
1 , D.A. Boyarskii
1 , N.Yu. Komarova
1 1 Space Research Institute RAS, Moscow, Russia
2 Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Moscow oblast , Russia
Accepted: 16.01.2017
DOI: 10.21046/2070-7401-2017-14-1-200-204
The paper presents an electrodynamics model of microwave emission of the “ice sheet – snow-firn layers - atmosphere” system. The model is adjusted for the real characteristics of snow-firn cover of the Antarctica, including stratification and structural properties of each layer (ice crusts, density, mean ice grain size, their dispersion, wetness, etc.). The model also considers the effects of microwave scattering by ice grains (Mie scattering). The model brightness temperatures for different regions of Antarctica (dome, zone of katabatic winds, coastal zone) agree well with SSM/I and SSMI/S data. As model input parameters (air temperature and physical and structural layer properties) we used the data of a Swedish-Japanese expedition of 2007/2008 that took place in the vast territory of Dronning Maud Land.
Keywords: Antarctica, snow-firn layers, brightness temperature, model of microwave emission
Full textReferences:
- Kotlyakov V.V., Izbrannye sochineniya. Kniga 1. Glyatsiologiya Antarktidyi (Selected works in six books. Book 1. Glaciology of Antarctica), Moscow: Nauka, 2000, 432 p.
- Bingham A.W., Drinkwater M.R., Recent changes in the microwave scattering properties of the Antarctic ice sheet, IEEE Transactions on Geoscience and Remote Sensing, 2000, Vol. 38, No. 4, pp. 1810–1820.
- Chang A.T.C., Choudhury B.J., Gloersen P., Microwave brightness of polar firn as measured by Nimbus 5 and 6 ESMR, J. of Glaciology, 1980, Vol. 25, No. 91, pp. 85–91.
- Koenig L.S., Steig E.J., Winebrenner D.P., Shuman C.A., A link between microwave extinction length, firn thermal diffusivity, and accumulation rate in West Antarctica, J. of Geophysical Research, 2007, Vol. 112, F03018. DOI: 10.1029/2006JF000716.
- Picard G., Brucker L., Fily M., Gallee H., Krinner G., Modeling time series of microwave brightness temperature in Antarctica, J. of Glaciology, 2009, Vol. 55, No. 191, pp. 537–551.
- Sharkov E.A., Passive microwave remote sensing of the Earth: Physical foundations, Berlin: Springer/PRAXIS, 2003, 613 p.
- Sugiyama S., Enomoto H., Fujita S., Fukui K., Nakazawa F., Holmlund P., Surdyk S., Dielectric permittivity of snow measured along the route traversed in the Japanese–Swedish Antarctic Expedition 2007/08, Annals of Glaciology, 2010, Vol. 51, No. 55, pp. 9–15.
- Sugiyama S., Enomoto H., Fujita S., Fukui K., Nakazawa F., Holmlund P., Surdyk S., Snow density along the route traversed by the Japanese–Swedish Antarctic Expedition 2007/08, J. of Glaciology, 2012, Vol. 58, No. 209, pp. 529–539.
- Tikhonov V.V., Boyarskii D.A., Sharkov E.A, Raev M.D., Repina I.A., Ivanov V.V, Alexeeva T.A., Komarova N.Yu., Microwave model of radiation from the multilayer “ocean-atmosphere” system for remote sensing studies of the polar regions, Progress In Electromagnetics Research B, 2014, Vol. 59, pp. 123–133.