publication . Other literature type . Article . 2018

Fast matrix treatment of 3-D radiative transfer in vegetation canopies: SPARTACUS-Vegetation 1.1

Hogan, Robin J.; Quaife, Tristan; Braghiere, Renato;
Open Access English
  • Published: 23 Jan 2018
  • Country: United Kingdom
Abstract
<jats:p>Abstract. A fast scheme is described to compute the 3-D interaction of solar radiation with vegetation canopies. The canopy is split in the horizontal plane into one clear region and one or more vegetated regions, and the two-stream equations are used for each, but with additional terms representing lateral exchange of radiation between regions that are proportional to the area of the interface between them. The resulting coupled set of ordinary differential equations is solved using the matrix-exponential method. The scheme is compared to solar Monte Carlo calculations for idealized scenes from the RAMI4PILPS intercomparison project, for open forest can...
Subjects
arXiv: Physics::GeophysicsAstrophysics::Solar and Stellar Astrophysics
free text keywords: Geology, QE1-996.5, Radiative transfer, Horizontal plane, Canopy, Vegetation, Computer science, Infrared, Snow, Absorptance, Atmospheric sciences, Monte Carlo method
23 references, page 1 of 2

Best, M. J., Pryor, M., Clark, D. B., Rooney, G. G., Essery, R. L. H., Ménard, C. B., Edwards, J. M., Hendry, M. A., Porson, A., Gedney, N., Mercado, L. M., Sitch, S., Blyth, E., Boucher, O., Cox, P. M., Grimmond, C. S. B., and Harding, R. J.: The Joint UK Land Environment Simulator (JULES), model description - Part 1: Energy and water fluxes, Geosci. Model Dev., 4, 677-699, https://doi.org/10.5194/gmd-4-677-2011, 2011.

Hansen, M., DeFries, R. S., Townshend, J. R. G., Carroll, M., Dimiceli, C., and Sohlberg, R. A.: Global percent tree cover at a spatial resolution of 500 meters: first results of the MODIS vegetation continuous fields algorithm, Earth Interact., 7, 1-15, 2003.

Higham, N. J.: The scalingand squaring method for the Matrix Exponential revisited, SIAM J. Matrix Anal. A., 26, 1179-1193, 2005.

Hogan, R. J.: SPARTACUS Vegetation 1.1: Matlab implementation of a matrix method to compute 3D radiative transfer in vegetation canopies (Version 1.1), Zenodo, https://doi.org/10.5281/zenodo.1100535, 2017.

Hogan, R. J. and Bozzo, A.: ECRAD: A New Radiation Scheme for the IFS, ECMWF Technical Memorandum 787, 33 pp., 2016. [OpenAIRE]

Hogan, R. J. and Shonk, J. K. P.: Incorporating the effects of 3D radiative transfer in the presence of clouds into two-stream multilayer radiation schemes, J. Atmos. Sci., 70, 708-724, 2013.

Hogan, R. J., Schäfer, S. A. K., Klinger, C., Chiu, J.-C., and Mayer, B.: Representing 3D cloud-radiation effects in twostream schemes: 2. Matrix formulation and broadband evaluation, J. Geophys. Res.-Atmos., 121, 8583-8599, 2016.

Jensen, M. P., Vogelmann, A. M., Collins, W. D., Zhang, G. J., and Luke, E. P.: Investigation of regional and seasonal variations in marine boundary layer cloud properties from MODIS observations, J. Climate, 21, 4955-4973, 2008. [OpenAIRE]

Lacis, A. A. and Hansen, J. E.: A parameterization for the absorption of solar radiation in the Earth's atmosphere, J. Atmos. Sci., 31, 118-133, 1974.

Loew, A., van Bodegom, P. M., Widlowski, J.-L., Otto, J., Quaife, T., Pinty, B., and Raddatz, T.: Do we (need to) care about canopy radiation schemes in DGVMs? Caveats and potential impacts, Biogeosciences, 11, 1873-1897, https://doi.org/10.5194/bg-11- 1873-2014, 2014.

Meador, W. E. and Weaver, W. R.: Two-stream approximations to radiative transefer in planetary atmospheres: a unified description of existing methods and a new improvement, J. Atmos. Sci., 37, 630-643, 1980.

Morcrette, C. J.: Improvements to a prognostic cloud scheme through changes to its cloud erosion parametrization, Atmos. Sci. Lett., 13, 95-102, 2012. [OpenAIRE]

Ni-Meister, W., Yang, W., and Kiang, N. Y.: A clumped-foliage canopy radiative transfer model for a global dynamic terrestrial ecosystem model. 1: Theory, Agr. Forest Meteorol., 150, 881- 894, 2010.

Pinty, B., Lavergne, T., Dickinson, R. E., Widlowski, J.-L., Gobron, N., and Verstraete, M. M.: Simplifying the interaction of land surfaces with radiation for relating remote sensing products to climate models, J. Geophys. Res., 111, D02116, https://doi.org/10.1029/2005JD005952, 2006. [OpenAIRE]

Putz, F. E., Parker, G. G., and Archibald, R. M.: Mechanical abrasion and intercrown spacing, Am. Midl. Nat., 112, 24-28, 1984. [OpenAIRE]

23 references, page 1 of 2
Powered by OpenAIRE Research Graph
Any information missing or wrong?Report an Issue