The Experts below are selected from a list of 60 Experts worldwide ranked by ideXlab platform
C E Sioris - One of the best experts on this subject based on the ideXlab platform.
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filling in of fraunhofer lines by plant fluorescence simulations for a nadir viewing satellite borne Instrument
Journal of Geophysical Research, 2003Co-Authors: C E Sioris, Gregory Bazalgette Courregeslacoste, Marcphilippe StollAbstract:Solar-excited plant fluorescence in the red/near-infrared is known to fill Fraunhofer lines at ground level. In this paper, it is shown that red/near-infrared fluorescence by vegetation can fill Fraunhofer lines much more effectively than rotational Raman scattering (RRS) by air (Ring effect) for nadir viewing from satellite altitudes. Thus, similarly to RRS, plant fluorescence can be remotely sensed from an orbiting spectrometer, and may impact the retrieval of atmospheric trace gases such as water vapor by high-resolution spectroscopy over vegetated land.
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Filling in of Fraunhofer lines by plant fluorescence: Simulations for a nadir‐viewing satellite‐borne Instrument
Journal of Geophysical Research, 2003Co-Authors: C E Sioris, Grégory Bazalgette Courrèges-lacoste, Marcphilippe StollAbstract:Solar-excited plant fluorescence in the red/near-infrared is known to fill Fraunhofer lines at ground level. In this paper, it is shown that red/near-infrared fluorescence by vegetation can fill Fraunhofer lines much more effectively than rotational Raman scattering (RRS) by air (Ring effect) for nadir viewing from satellite altitudes. Thus, similarly to RRS, plant fluorescence can be remotely sensed from an orbiting spectrometer, and may impact the retrieval of atmospheric trace gases such as water vapor by high-resolution spectroscopy over vegetated land.
Marcphilippe Stoll - One of the best experts on this subject based on the ideXlab platform.
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filling in of fraunhofer lines by plant fluorescence simulations for a nadir viewing satellite borne Instrument
Journal of Geophysical Research, 2003Co-Authors: C E Sioris, Gregory Bazalgette Courregeslacoste, Marcphilippe StollAbstract:Solar-excited plant fluorescence in the red/near-infrared is known to fill Fraunhofer lines at ground level. In this paper, it is shown that red/near-infrared fluorescence by vegetation can fill Fraunhofer lines much more effectively than rotational Raman scattering (RRS) by air (Ring effect) for nadir viewing from satellite altitudes. Thus, similarly to RRS, plant fluorescence can be remotely sensed from an orbiting spectrometer, and may impact the retrieval of atmospheric trace gases such as water vapor by high-resolution spectroscopy over vegetated land.
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Filling in of Fraunhofer lines by plant fluorescence: Simulations for a nadir‐viewing satellite‐borne Instrument
Journal of Geophysical Research, 2003Co-Authors: C E Sioris, Grégory Bazalgette Courrèges-lacoste, Marcphilippe StollAbstract:Solar-excited plant fluorescence in the red/near-infrared is known to fill Fraunhofer lines at ground level. In this paper, it is shown that red/near-infrared fluorescence by vegetation can fill Fraunhofer lines much more effectively than rotational Raman scattering (RRS) by air (Ring effect) for nadir viewing from satellite altitudes. Thus, similarly to RRS, plant fluorescence can be remotely sensed from an orbiting spectrometer, and may impact the retrieval of atmospheric trace gases such as water vapor by high-resolution spectroscopy over vegetated land.
Pinhas Alpert - One of the best experts on this subject based on the ideXlab platform.
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Synoptic patterns associated with dusty and non-dusty seasons in the Sahara
Theoretical and Applied Climatology, 2008Co-Authors: J. Barkan, Pinhas AlpertAbstract:The difference in the synoptic situation between years with a large amount of dust and years with a relatively small amount, in the Sahara, have been examined for the period 1979–1992. A comparison has been made separately for each season. For every month the dustiest and least dustiest years, determined by the deviation from the mean, were chosen and the average of the three months of each classical season for these years was examined. The examination was made for wind flow, geopotential height and temperature at the 700 hPa level, and appropriate maps of these variables have been prepared. The data used were the daily aerosol index (AI) from the TOMS Satellite-Borne Instrument and daily NCEP/NCAR reanalysis data for the years 1979–1992. It was found that there is significant difference in the atmospheric variables between dusty and non-dusty years in the Sahara and the area to the north and to the west. In the spring, summer and autumn seasons there is a significant increase in cyclonic flow during dusty years relative to non-dusty years in western Europe and western North Africa. Accordingly, there is strong cooling and a decrease in geopotential height in this area. In the central and eastern Sahara and the central Mediterranean anticyclonic flow predominates, there is significant relative warming and an increase in the geopotential height. In the winter season, the distribution of cyclonic and anticyclonic activity, instead of east to west, becomes orientated north to south. Mean cyclonic activity, together with cooling and decreased height, is found in south-eastern Europe, and anticyclonic activity is found in the Sahara.
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Synoptic patterns associated with dusty and non-dusty seasons in the Sahara
Theoretical and Applied Climatology, 2008Co-Authors: J. Barkan, Pinhas AlpertAbstract:The difference in the synoptic situation between years with a large amount of dust and years with a relatively small amount, in the Sahara, have been examined for the period 1979–1992. A comparison has been made separately for each season. For every month the dustiest and least dustiest years, determined by the deviation from the mean, were chosen and the average of the three months of each classical season for these years was examined. The examination was made for wind flow, geopotential height and temperature at the 700 hPa level, and appropriate maps of these variables have been prepared. The data used were the daily aerosol index (AI) from the TOMS Satellite-Borne Instrument and daily NCEP/NCAR reanalysis data for the years 1979–1992.
Ning Li - One of the best experts on this subject based on the ideXlab platform.
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thermal analysis of a satellite borne Instrument
International Conference on Robotics and Automation, 2014Co-Authors: Bo Chen, Ning LiAbstract:Thermal design and analysis of a satellite Instrument is introduced in this paper. Some methods were adopted to help heat conduct and a finite element model was built. The analysis results showed that the temperature scopes of the main structures are from 45°C to 65.8°C and all of junction temperatures of the components are lower than the derated maximum junction temperatures themselves and leave enough design margins, which match the requirements of thermal analysis.
J. Barkan - One of the best experts on this subject based on the ideXlab platform.
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Synoptic patterns associated with dusty and non-dusty seasons in the Sahara
Theoretical and Applied Climatology, 2008Co-Authors: J. Barkan, Pinhas AlpertAbstract:The difference in the synoptic situation between years with a large amount of dust and years with a relatively small amount, in the Sahara, have been examined for the period 1979–1992. A comparison has been made separately for each season. For every month the dustiest and least dustiest years, determined by the deviation from the mean, were chosen and the average of the three months of each classical season for these years was examined. The examination was made for wind flow, geopotential height and temperature at the 700 hPa level, and appropriate maps of these variables have been prepared. The data used were the daily aerosol index (AI) from the TOMS Satellite-Borne Instrument and daily NCEP/NCAR reanalysis data for the years 1979–1992. It was found that there is significant difference in the atmospheric variables between dusty and non-dusty years in the Sahara and the area to the north and to the west. In the spring, summer and autumn seasons there is a significant increase in cyclonic flow during dusty years relative to non-dusty years in western Europe and western North Africa. Accordingly, there is strong cooling and a decrease in geopotential height in this area. In the central and eastern Sahara and the central Mediterranean anticyclonic flow predominates, there is significant relative warming and an increase in the geopotential height. In the winter season, the distribution of cyclonic and anticyclonic activity, instead of east to west, becomes orientated north to south. Mean cyclonic activity, together with cooling and decreased height, is found in south-eastern Europe, and anticyclonic activity is found in the Sahara.
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Synoptic patterns associated with dusty and non-dusty seasons in the Sahara
Theoretical and Applied Climatology, 2008Co-Authors: J. Barkan, Pinhas AlpertAbstract:The difference in the synoptic situation between years with a large amount of dust and years with a relatively small amount, in the Sahara, have been examined for the period 1979–1992. A comparison has been made separately for each season. For every month the dustiest and least dustiest years, determined by the deviation from the mean, were chosen and the average of the three months of each classical season for these years was examined. The examination was made for wind flow, geopotential height and temperature at the 700 hPa level, and appropriate maps of these variables have been prepared. The data used were the daily aerosol index (AI) from the TOMS Satellite-Borne Instrument and daily NCEP/NCAR reanalysis data for the years 1979–1992.
