%0 Journal Article
%4 sid.inpe.br/plutao/2017/06.21.20.38.49
%2 sid.inpe.br/plutao/2017/06.21.20.38.50
%@doi 10.1002/qj.3026
%@issn 0035-9009
%F lattes: 4336175279058172 3 PilottoRoChToSaGo:2017:EfSuHe
%T Effects of the surface heterogeneities on the local climate of a fragmented landscape in Amazonia using a tile approach in the Eta/Noah-MP model
%D 2017
%9 journal article
%A Pilotto, Isabel Lopes,
%A Rodriguez, Daniel Andres,
%A Chou, Sin Chan,
%A Oliveira, Gilvan Sampaio de,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@electronicmailaddress isabel.pilotto@inpe.br
%@electronicmailaddress daniel.andres@inpe.br
%@electronicmailaddress chou.chan@inpe.br
%@electronicmailaddress gilvan.sampaio@inpe.br
%B Quarterly Journal of The Royal Meteorological Society
%V 143
%N 704
%P 1565-1580
%X This study evaluates the use of tiles to estimate the effects of surface heterogeneities in simulations of local climate in a landscape-fragmented region of Amazonia. Three experiments using the Eta/Noah-MP model were designed as follows: two experiments with a spatial resolution of 5 km with and without the use of the tile approach. The third experiment used a finer spatial resolution of 2 km without the use of the tile approach (high-resolution experiment). Simulations were carried out for the rainy and dry seasons, which correspond to the months of March and September 2003, respectively. In general, the magnitude of surface fluxes is significantly affected by the introduction of tiles. In the dry season, the use of tiles in the simulation increases the magnitude of precipitation (about 7 mm day−1), skin temperature (about 4 °C), sensible heat flux (about 80 W m−2) and surface albedo (about 0.7). It reduces the latent heat flux (about 30 W m−2) and net radiation (about 40 W m−2). On the other hand, in the rainy season, the model produces excessive precipitation. This may have partly masked the signs of the land fragmentation impact. The tile experiment generates a warmer and drier boundary layer during the dry season. The impact of the surface heterogeneity representation is higher in the dry season than in the rainy season. The results suggest that the degree of impact of the subgrid process representation on the local climate is related to the spatial scale of the fragmentation. The use of the tile approach improves the representation of the effects of landscape heterogeneity on the spatial distribution of surface flux variability in fragmented areas. Comparison against measured data from flux towers in the region show that the model can simulate diurnal and seasonal variations in the local fluxes, despite the biases.
%@language en
%3 pilotto_effects.pdf