Using reflectance spectroscopy to monitor vegetation pigments is a crucial method know the nutritional status, environmental stress, and phenological phase of vegetation. Defining cities as targeted areas common greening plants research objects, pigment concentrations dust deposition amounts urban were classified explore spectral difference, respectively. Furthermore, according different levels...

1- introduction despite of technology progressives, natural hazards caused damage of world cities propertys and life, part of the damages related to adequate uncognition response to natural hazards. the dust natural hazard occurrence has attracted public attention in the recent years. nonrecieption and attention to the natural hazards not only affected society economic, but also affected differ...

We re-address the classification criterion for extremely red galaxies (ERGs) of Pozzetti & Mannucci (2000 – PM00), which aims to separate, in the Ic − K (or Rc − K) vs. J−K colour–colour diagram, passively evolving, old (> 1 Gyr) stellar populations in a dust-free environment, associated with ellipticals (Es), from dusty starburst galaxies (DSGs), both at 1 < z < 2. We explore a category of obj...

[1] A thermal infrared remote sensing retrieval method developed by Wen and Rose [1994], which retrieves particle sizes, optical depth, and total masses of silicate particles in the volcanic cloud, was applied to an April 07, 2001 sandstorm over northern China, using MODIS. Results indicate that the area of the dust cloud observed was 1.34 million km, the mean particle radius of the dust was 1....

Introduction: During August 03 a dust devil field investigation campaign was conducted in the El Dorado Valley, Nevada. This field site has been well characterised previously [9], and has a well documented record of dust devil events. We report on one particular encounter from this field campaign, whereby a dust devil was sampled by a large number of sensors. These measurements consist of wind ...

We have observed emission in the three lowest rotational transitions of the optically thin species C 18 O and the dust continuum emission at three millimeter/submillimeter wavelengths. By employing the proper combination of the intensities of the three lowest rotational transitions of C 18 O, we can obtain the total molecular column density with relatively little sensitivity to density and temp...

Using Chandra observations we have measured the energy-resolved dust-scattered X-ray halo around the low-mass X-ray binary GX5-1, which shows signs of both singlyand multiply-scattered X-rays. We compared the observed X-ray halo at various energies to predictions from a range of dust models. These fits used both smoothly-distributed dust as well as dust in clumped clouds, with CO and 21 cm obse...

This study identified the relationship between the layer-integrated attenuated backscatter coefficient and layer-integrated depolarization ratio of dust plumes and compared it with that of cloud, using CALIPSO LIDAR measurements. The histogram distribution of the integrated color ratio for dust and cloud was also examined. On the basis of the layer-integrated attenuated backscatter coefficient ...