Intraannual and interannual changes in the surface area of a closed lake complex in southwestern Siberia using NOAA images

Abstract

The Lake Chany complex, located in southwestern Siberia, consists of large shallow lakes with an average depth of about 2.2 m. The area of the lake fluctuates with the water level, which is closely related to the amount of inflow and evaporation, as the lake complex is endorheic. Using National Oceanic and Atmospheric Administration (NOAA) satellite images of the ice-free periods from 1999 to 2004, we evaluated the seasonal changes in the lake area and surrounding vegetation of the Lake Chany complex. The maximum lake area was observed in early May and decreased until late July. The lake area in August was about 60% of the maximum. Subsequently, the area tended to increase until early October. Compared to ground-truth data, the areas undergoing seasonal fluctuations in the NOAA images corresponded to vast stands of vegetation (Phragmites australis) that were several kilometers wide. These areas seem to be influenced by the inflow of snowmelt water and reed growth. Although interannual differences in the seasonal change in lake area were not great for the whole lake complex, the isolated Yudinskii Pool showed large interannual differences during summer and autumn, suggesting that monitoring this area using NOAA images will be useful for estimating the interannual fluctuations in the southwestern Siberian environment.

The changing water cycle: Burabay National Nature Park, Northern Kazakhstan

“…Gronewold et al 32 in their synthesis on the hydrological status of the North American Great Lakes, asserted that a continual increase in lake evaporation over the past 50 years is related to a long-term change in climate which has led to the decrease in permanent water levels in the world's largest lake system, especially during the last decades. Shikano et al 23 estimated total evaporation for Chany, a shallow endorheic lake in Southwest Siberia close to BNNP area, to amount to 714 mm (1994)(1995)(1996)(1997)(1998)(1999). Two recent studies focused on North Eurasia's ET 36,37 ; based on ecosystem and remote sensing modeling efforts they found open-water evaporation estimates (using the Penman model) about 800 mm year …”

“…5,22,23 Among BNNP lakes, only Burabay Lake has two continuous tributaries. The other lakes have no permanent surface channel inflows or outflows.…”

Lake areas monitoring based on unmixing mixed pixels united with double-edge extraction

“…As a whole, lake monitoring with remote sensing technology at present comes down to two types: one is based on high spatial resolution data such as SPOT, TM and ASTER to acquire information about lakes directly; the other is based on moderate or low resolution RS data like AVHRR to obtain lakes information combining with specific algorithms. current scholars carry some studies on the monitoring lakes with the high spatial resolution(Yingbao Yang et al,2005;Tiit Kutser et al,2005; Anatoly P. Shevyrnogov et al,2006), others did some researches into monitoring lakes based on low spatial resolution with corresponding algorithms(Yitong Liang et al,2001;Ni Guo et al,2003;Shuichi Shikano et al,2006). However, monitoring lake areas with high resolution RS images in a large scale is not so practical when we consider points as follows: (1) high spatial resolution RS images generally have low temporal resolution; (2) they can easily be affected by clouds thus in rainy seasons it is hard to get enough images to study dynamic changes of lake water;…”

Минеральный Состав Осадков Озера Малые Чаны Как Индикатор Изменения Климата Голоцена (Юг Западной Сибири)

“…В частности, рассматриваются его водный баланс, геохимические характеристики озерных вод [Савкин и др., 2005, 2006], поведение в них изотопов углерода, кислорода, серы и азота [Doi et al, 2004;Mizota et al, 2009], межсезонные изменения флоры и фауны [Shikano et al, 2006;Обзор экологического состояния…, 2015], состав и структура зообентоса [Kipriyanova et al, 2007;Безматерных и др., 2011].…”