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Abstract:

In this study, we compared different remote-sensing (RS)-based land surface models (LSM) and reanalysis latent heat flux (LE) products over different forest ecosystems. We analysed the performance of three RS products, the MOD16A2, the Breathing Earth System Simulator (BESS) model, and a combined optical-microwave model (COM) in their ability to replicate eddy covariance (EC) flux observations of LE at eight southern hemisphere forest ecosystems and compared their results to simulated LE from the offline LSM (GLDAS/NOAH) and a reanalysis LE dataset (MERRA). To determine spatial uncertainties, we used the triple collocation (TC) method, which does not require a priori knowledge of the true LE value, at selected Australian EC locations and over an area without in situ measurement (the Dry Chaco Forest (DCF), Argentina). The spatial pattern of the TC results was commensurable with uncertainties calculated using EC observations, indicating that the TC method is a robust technique to estimate spatial uncertainties. As global products have been validated with EC measurement from Ozflux stations, we hypothesized and found, using the TC model, that LE products achieve a better performance over areas with EC from networks than over sites without ground-based measurements and may reflect over-calibration of models or a need for a more diverse representation of ecosystems at flux tower networks. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.

Registro:

Documento: Artículo
Título:Comparison of the performance of latent heat flux products over southern hemisphere forest ecosystems: estimating latent heat flux error structure using in situ measurements and the triple collocation method
Autor:Barraza Bernadas, V.; Grings, F.; Restrepo-Coupe, N.; Huete, A.
Filiación:Institute of Astronomy and Space Physics (IAFE-CONICET-UBA), CABA, Buenos Aires, Argentina
Plant Functional Biology and Climate Change Cluster, University of Technology Sydney, Sydney, Australia
Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, United States
Palabras clave:Ecosystems; Forestry; Latent heat; Remote sensing; Uncertainty analysis; Collocation method; Ground based measurement; In-situ measurement; Land surface models; Optical microwaves; Priori knowledge; Southern hemisphere forests; Spatial uncertainty; Heat flux; comparative study; forest ecosystem; in situ measurement; land surface; latent heat flux; performance assessment; remote sensing; Southern Hemisphere
Año:2018
Volumen:39
Número:19
Página de inicio:6300
Página de fin:6315
DOI: http://dx.doi.org/10.1080/01431161.2018.1458348
Título revista:International Journal of Remote Sensing
Título revista abreviado:Int. J. Remote Sens.
ISSN:01431161
CODEN:IJSED
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01431161_v39_n19_p6300_BarrazaBernadas

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Citas:

---------- APA ----------
Barraza Bernadas, V., Grings, F., Restrepo-Coupe, N. & Huete, A. (2018) . Comparison of the performance of latent heat flux products over southern hemisphere forest ecosystems: estimating latent heat flux error structure using in situ measurements and the triple collocation method. International Journal of Remote Sensing, 39(19), 6300-6315.
http://dx.doi.org/10.1080/01431161.2018.1458348
---------- CHICAGO ----------
Barraza Bernadas, V., Grings, F., Restrepo-Coupe, N., Huete, A. "Comparison of the performance of latent heat flux products over southern hemisphere forest ecosystems: estimating latent heat flux error structure using in situ measurements and the triple collocation method" . International Journal of Remote Sensing 39, no. 19 (2018) : 6300-6315.
http://dx.doi.org/10.1080/01431161.2018.1458348
---------- MLA ----------
Barraza Bernadas, V., Grings, F., Restrepo-Coupe, N., Huete, A. "Comparison of the performance of latent heat flux products over southern hemisphere forest ecosystems: estimating latent heat flux error structure using in situ measurements and the triple collocation method" . International Journal of Remote Sensing, vol. 39, no. 19, 2018, pp. 6300-6315.
http://dx.doi.org/10.1080/01431161.2018.1458348
---------- VANCOUVER ----------
Barraza Bernadas, V., Grings, F., Restrepo-Coupe, N., Huete, A. Comparison of the performance of latent heat flux products over southern hemisphere forest ecosystems: estimating latent heat flux error structure using in situ measurements and the triple collocation method. Int. J. Remote Sens. 2018;39(19):6300-6315.
http://dx.doi.org/10.1080/01431161.2018.1458348