An approach to the estimation of surface net radiation in mountain areas using remote sensing and digital terrain data

Duguay, Claude R.

doi:10.1007/bf00865507

Cited by 36 publications

(20 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, they are often not suitable to characterize rugged areas such as the Tibetan Plateau [21], even if some of those algorithms have been adapted to tilted surfaces [22][23][24][25]. The challenge is then to model the solar radiation budget at a higher spatial resolution and to account for the variations in topography.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Daily Solar Radiation Budget at Kilometer Resolution over the Tibetan Plateau by Integrating MODIS Data Products and a DEM

Roupioz

Nerry

et al. 2016

Remote Sensing

View full text Add to dashboard Cite

Considering large and complex areas like the Tibetan Plateau, an analysis of the spatial distribution of the solar radiative budget over time not only requires the use of satellite remote sensing data, but also of an algorithm that accounts for strong variations of topography. Therefore, this research aims at developing a method to produce time series of solar radiative fluxes at high temporal and spatial resolution based on observed surface and atmosphere properties and topography. The objective is to account for the heterogeneity of the land surface using multiple land surface and atmospheric MODIS data products combined with a digital elevation model to produce estimations daily at the kilometric level. The developed approach led to the production of a three-year time series (2008)(2009)(2010) of daily solar radiation budget at one kilometer spatial resolution across the Tibetan Plateau. The validation showed that the main improvement from the proposed method is a higher spatial and temporal resolution as compared to existing products. However, even if the solar radiation estimates are satisfying on clear sky conditions, the algorithm is less reliable under cloudy sky condition and the albedo product used here has a too coarse temporal resolution and is not accurate enough over rugged terrain.

show abstract

Section: Introductionmentioning

confidence: 99%

Estimation of Daily Solar Radiation Budget at Kilometer Resolution over the Tibetan Plateau by Integrating MODIS Data Products and a DEM

Roupioz

Nerry

et al. 2016

Remote Sensing

View full text Add to dashboard Cite

show abstract

“…Field data is needed to solve this problem and some approaches have been suggested (Kustas et al 1994b, Duguay 1995. Full investigation of these methodologies in a range of environments, including the subarctic, is required.…”

Section: Discussionmentioning

confidence: 99%

“…The approach employed in this analysis is based on previous work by Duguay (1994Duguay ( , 1995 on the radiation balance of alpine tundra surfaces. In this approach, the LOWTRAN 7 radiative transfer code is used to calculate incoming solar radiation for the spectral ranges covered by the Landsat TM bands (Table 2) and to correct for atmospheric effects due to path radiance and atmospheric transmittance in the short-and longwave portions of the electromagnetic spectrum.…”

Section: Estimation Of the Radiation Balancementioning

confidence: 99%

“…Computed incoming short-and longwave radiation fluxes within the bandpass of the field instruments were assumed to be constant over the area of interest (18 km × 18 km), the terrain being relatively flat. Surface albedo and thermal exitance values were then estimated remotely following the approach presented by Duguay & LeDrew (1991, 1992 and Duguay (1994Duguay ( , 1995, and summarised below.…”

Section: Estimation Of the Radiation Balancementioning

confidence: 99%

See 1 more Smart Citation

Radiation balance of wetland tundra at northern treeline estimated from remotely sensed data

Duguay

Wr²,

Lafleur³

et al. 1999

Clim. Res.

View full text Add to dashboard Cite

Traditional methods of measuring surface net radiation involve point measurements that represent only a small area surrounding the instrumented sites. Remotely sensed spaceborne data offer the means by which to obtain estimates of the outgoing fluxes at the regional scale. The objective of this study was to estimate surface albedo, surface thermal exitance, and net radiation using Landsat Thematic Mapper (TM) data over wetland tundra at northern treeline near Churchill, Manitoba, Canada. Ground-based measurements of each component of the radiation balance were acquired at 5 locations coincident with 2 TM overpasses during summer 1991. Each location was representative of 1 of the major terrain types found in the Hudson Bay Lowlands (i.e. sedge-dominated wetland, upland lichenheath, tundra lakes and ponds, willow/birch wetland, and open spruce-tamarack forest). The mean absolute differences between remote sensing estimates and field measurements (all sites combined) are 0.01 for albedo, 25.7 W m -2 for thermal exitance, and 14.1 W m -2 for net radiation. The 2 summer 1991 TM images (June and August) were then used to examine within and between terrain type variations in surface net radiation during the growing season. TM imagery from August 1984 and August 1991 were also utilised to investigate differences in surface fluxes between a dry year (1984) and a wet year (1991). Results indicate that surface wetness and, to a lesser extent, phenology are the 2 main factors controlling the radiation balance during the summer period in this subarctic tundra-forest landscape.

show abstract

“…Proy et al (1989) presented a solar radiation model which uses a digital terrain model to calculate topographic characteristics but does not consider the effect of the atmospheric attenuation of insolation. Dubayah (1992), Gratton et al (1993) and Duguay (1995) successfully estimated net radiation flux using Landsat data and DEM, but these models use a radiative transfer model which requires atmospheric radiosonde measurements. Long et al (2010) successfully estimated daily average net radiation flux using MODIS and DEM, but assumed transmissivity to be constant.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Estimation of net radiation flux distribution on the southern slopes of the central Himalayas using MODIS data

Amatya

Han

et al. 2015

Atmospheric Research

View full text Add to dashboard Cite

An approach to the estimation of surface net radiation in mountain areas using remote sensing and digital terrain data

Cited by 36 publications

References 23 publications

Estimation of Daily Solar Radiation Budget at Kilometer Resolution over the Tibetan Plateau by Integrating MODIS Data Products and a DEM

Estimation of Daily Solar Radiation Budget at Kilometer Resolution over the Tibetan Plateau by Integrating MODIS Data Products and a DEM

Radiation balance of wetland tundra at northern treeline estimated from remotely sensed data

Estimation of net radiation flux distribution on the southern slopes of the central Himalayas using MODIS data

Contact Info

Product

Resources

About