Located high in Central Asia’s Tian Shan Mountains, Issyk Kul is one of the world’s largest alpine lakes. Though Issyk Kul literally means “warm lake” in the Kyrgyz language, the crystalline waters vary in surface temperature from as high as 73 degrees Fahrenheit in July to as low as 36 degrees Fahrenheit in January. Still, warmth is relative, and at 1,607 meters (5,272 ft) above sea level, summer surface temperatures seem practically balmy.
The lake is picturesque, with glaciated Tian Shan peaks flanking its northern and southern shores, and is a popular tourist destination for both Kyrgyz nationals and foreign visitors. Don’t have time to trek to Kyrgyzstan just yet? Photo Friday has you covered!
Roundup: Glacier-Fed Lakes, Remote Sensing, and Soil
Global Warming and Glacier-Fed Lakes
From Freshwater Biology: “Climate warming is accelerating the retreat of glaciers, and recently, many ‘new’ glacial turbid lakes have been created. In the course of time, the loss of the hydrological connectivity to a glacier causes, however, changes in their water turbidity (cloudiness) and turns these ecosystems into clear ones. To understand potential differences in the food-web structure between glacier-fed turbid and clear alpine lakes, we sampled ciliates (single-celled animals bearing ciliates), phyto-, bacterio- and zooplankton in one clear and one glacial turbid alpine lake, and measured key physicochemical parameters. In particular, we focused on the ciliate community and the potential drivers for their abundance distribution.”
Learn more about how global warming affects lakes here:
Glacier Remote Sensing Using Sentinel-2
From Remote Sensing: “Mapping of glacier extents from automated classification of optical satellite images has become a major application of the freely available images from Landsat. A widely applied method is based on segmented ratio images from a red and shortwave infrared band. With the now available data from Sentinel-2 (S2) and Landsat 8 (L8) there is high potential to further extend the existing time series (starting with Landsat 4/5 in 1982) and to considerably improve over previous capabilities, thanks to increased spatial resolution and dynamic range, a wider swath width and more frequent coverage.”
From Journal of Ecology: “Plant–soil interactions are temporally dynamic in ways that are important for the development of plant communities. Yet, during primary succession [colonization of plant life in a deglaciated landscape], the degree to which changing soil characteristics (e.g. increasing nutrient availabilities) and developing communities of soil biota influence plant growth and species turnover is not well understood. We conducted a two-phase glasshouse experiment with two native plant species and soils collected from three ages (early, mid- and late succession) of an actively developing glacial chronosequence ranging from approximately 5 to <100 years in age.”
Learn more about the impact of soil during glacier succession here: