Бидний тухай
Багш ажилтан
This research attempts to locate an appropriate location for constructing a naturally iced cellar in the Ulaanbaatar area, where food consumption is high and food storage vaults are few. Ulaanbaatar is the place of residence for 48 percent of Mongolia's population. On the basis of Alos Palsar and Sentinel-2 satellite data, empirical statistical modeling techniques were used to map the surface conditions and permafrost distribution in Ulaanbaatar. Nevertheless, economic and health factors were also taken into account while choosing the best locations for the building of a naturally iced cellar. This was done by calculating the cold reserves using air temperature data from the ERA5-Land reanalysis with an accuracy of 0.1°. According to the results of the research, 37 percent of the total territory of Ulaanbaatar city, or 1470.9 km2, has permafrost, and 89 km2 is a residential area. Ulaanbaatar city accumulates considerable cold reserves in the east and north, up to -1290°C, while it is positive in the southwest, or +169°C in Ulziit, if we compare the FDD (freezing degree days) and TDD (thawing degree days) temperatures. Based on the aforementioned results, we discovered 557 prospective ice cellar locations totaling 210.2 km2. The remaining points can be used to construct vegetable cellars, leaving 276 points available for building meat cellars. The relationship between the results of this investigation and the field measurement and meteorological station data from the previous time period was usually excellent. In contrast to previous permafrost distribution maps, it also has the advantage of offering more accurate coverage of permafrost distributed regions. To confirm the distribution of the permafrost and the sites of the iced cellars, more field measurements are necessary.
Сүүлийн жилүүдэд явагдаж буй уур амьсгалын өөрчлөлт нь хүний үйл ажиллагаанаас үүдэлтэйгээр агаар мандалд нүүрсхүчлийн хий , метан, азотын исэл буюу хүлэмжийн хийн агууламж нэмэгдсэнтэй холбоотой . Иймд, дэлхий орнууд хүлэмжийн хийн ялгарлыг бууруулах, дасан зохицох, олон арга хэмжээг зохион байгуулан ажиллаж байна. Түүнчлэн ялгаатай бүс нутагт хүлэмжийн хийн урсгал, түүний шинж чанарыг бодит хэмжилтээр тодорхойлох нь чухал ач холбогдолтой.
Climate change affects the environment and socioeconomic development. However, the influence of climate change on the specific local environment has not been sufficiently addressed, since Mongolia has an extensive territory. It is evident that ongoing climate change affects permafrost existence through altered climate regimes and variability in the northern part of Mongolia. In this study, we examined climate and environmental conditions in the Shiljiree valley, Mongolia, where discontinuous permafrost is distributed, using the combined method of satellite remote-sensing and ground measurement data. At 20 points in Shiljiree valley, which included both grassland and forest area, we measured the ground surface temperature (GST). The normalized difference vegetation index (NDVI) and LST were obtained using spectral information from Landsat satellite 8. This study compared different measures of microclimate area which were air temperature and vegetation data from a meteorological station (Terelj) and Landsat-8 NDVI, LST. Furthermore, we used a digital elevation model (DEM) from the Alos palsar satellite image with a 12.5-m resolution. Aspect, slope, and elevation maps were derived from the DEM dataset.
