the altitude to which the past glaciers had been extended during the last glacial period in dinevar basin, western iran, can be estimated based on glacier-geomorpic evidence such as cirques, u-shaped valleys, and the moraines in lowlands. this study estimates the elevation of snowline during this period for the basin as the objective of the research. topographic and geologic maps, landsat image...

[1] The substantial lowering of tropical snowlines at the Last Glacial Maximum (LGM), circa 21 kya, is examined using a modified version of the single-cell tropical climate model of Betts and Ridgway [1989]. These authors concluded that it was difficult to reconcile the large depression of snowlines at the LGM with the small reduction in mean tropical sea-surface temperature (SST) of the Climat...

The assessment of the performance of multi-resolution image fusion, or image sharpening methods, is difficult. In the context of binary classification of snow targets in mountainous terrain, fusion methods were applied to help achieve more accurate mapping. To quantify objectively the gain of information that can be attributed to an increase in spatial resolution, we investigate the Mean Euclid...

[Abridged] Planet formation is expected to be enhanced around snowlines in protoplanetary disks, particular the water snowline. However, close proximity of snowline host star and Earth's atmosphere makes a direct detection disks challenging. Following earlier work on protostellar envelopes, aim this research investigate validity HCO$^+$ H$^{13}$CO$^+$, as tracers destroyed by gas-phase water. T...

Introduction: We apply high-resolution 26 Al-26 Mg chronometry to primitive meteorites of various oxidation states. The objective is to test the hypothesis that the fluctuating redox states of the protoplanetary disk were governed by radial transport of water ice and organic materials, evaporating, respectively, after crossing the snowline and tarline in the solar nebula. The chronology of redo...