Seasonal and Inter-annual Variations of Lake Surface Area of Orog Lake in Gobi, Mongolia During 2000-2010

He, Yunhui; Lee, Eun‐Hye; Do, N.; Ko, Dongwook W.; Kang, Sinkyu

doi:10.7780/kjrs.2012.28.3.267

Cited by 8 publications

(2 citation statements)

References 13 publications

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“…As results, the minimum lake area occurring in July or August showed 20% greater annual reduction rate (-52.0 km 2 yr -1 ) than the maximum lake area (-42.5 km 2 yr -1 ) for the 73 lakes investigated in this study. This implicates rising vulnerability of temporary lake water depletion during high summer season [ 41 ], which could give detrimental effects on local water demanding sectors such as livestock herding and vegetation growth in arid and semi-arid regions [ 38 ].…”

Section: Discussionmentioning

confidence: 99%

Assessing Seasonal and Inter-Annual Variations of Lake Surface Areas in Mongolia during 2000-2011 Using Minimum Composite MODIS NDVI

Kang

Hong

2016

PLoS ONE

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A minimum composite method was applied to produce a 15-day interval normalized difference vegetation index (NDVI) dataset from Moderate Resolution Imaging Spectroradiometer (MODIS) daily 250 m reflectance in the red and near-infrared bands. This dataset was applied to determine lake surface areas in Mongolia. A total of 73 lakes greater than 6.25 km2in area were selected, and 28 of these lakes were used to evaluate detection errors. The minimum composite NDVI showed a better detection performance on lake water pixels than did the official MODIS 16-day 250 m NDVI based on a maximum composite method. The overall lake area detection performance based on the 15-day minimum composite NDVI showed -2.5% error relative to the Landsat-derived lake area for the 28 evaluated lakes. The errors increased with increases in the perimeter-to-area ratio but decreased with lake size over 10 km2. The lake area decreased by -9.3% at an annual rate of -53.7 km2 yr-1 during 2000 to 2011 for the 73 lakes. However, considerable spatial variations, such as slight-to-moderate lake area reductions in semi-arid regions and rapid lake area reductions in arid regions, were also detected. This study demonstrated applicability of MODIS 250 m reflectance data for biweekly monitoring of lake area change and diagnosed considerable lake area reduction and its spatial variability in arid and semi-arid regions of Mongolia. Future studies are required for explaining reasons of lake area changes and their spatial variability.

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Section: Discussionmentioning

confidence: 99%

Assessing Seasonal and Inter-Annual Variations of Lake Surface Areas in Mongolia during 2000-2011 Using Minimum Composite MODIS NDVI

Kang

Hong

2016

PLoS ONE

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“…the Gobi area) has a few highly scattered small lakes. Many of the scattered lakes in the Gobi have suffered from water depletion and temporary disappearance for the last several decades (Chuluun et al, 2010;Yang et al, 2012). We selected 10 regions across Mongolia depending on the data availability of multi-temporal Landsat images (Fig.…”

Section: Study Areamentioning

confidence: 99%

Characterizing regional precipitation-driven lake area change in Mongolia

et al. 2014

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Lake area is an important indicator for climate change and its relationship with climatic factors is critical for understanding the mechanisms that control lake level changes. In this study, lake area changes and their relations to precipitation were investigated using multi-temporal Landsat Thermatic Mapper (TM) and Enhanced Thermatic Mapper plus (ETM+) images collected from 10 different regions of Mongolia since the late 1980s. A linear-regression analysis was applied to examine the relationship between precipitation and lake area change for each region and across different regions of Mongolia. The relationships were interpreted in terms of regional climate regime and hydromorphological characteristics. A total of 165 lakes with areas greater than 10 hm 2 were identified from the Landsat images, which were aggregated for each region to estimate the regional lake area. Temporal lake area variability was larger in the Gobi regions, where small lakes are densely distributed. The regression analyses indicated that the regional patterns of precipitation-driven lake area changes varied considerably (R 2 =0.028-0.950), depending on regional climate regime and hydromorphological characteristics. Generally, the lake area change in the hot-and-dry Gobi regions showed higher correlations with precipitation change. The precedent two-month precipitation was the best determining factor of lake area change across Mongolia. Our results indicate the usefulness of regression analysis based on satellite-derived multi-temporal lake area data to identify regions where factors other than precipitation might play important roles in determining lake area change.

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The future of Iranian wetlands under climate change

Sanjerehei

Rundel

2016

Wetlands Ecol Manage

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Seasonal and Inter-annual Variations of Lake Surface Area of Orog Lake in Gobi, Mongolia During 2000-2010

Cited by 8 publications

References 13 publications

Assessing Seasonal and Inter-Annual Variations of Lake Surface Areas in Mongolia during 2000-2011 Using Minimum Composite MODIS NDVI

Assessing Seasonal and Inter-Annual Variations of Lake Surface Areas in Mongolia during 2000-2011 Using Minimum Composite MODIS NDVI

Characterizing regional precipitation-driven lake area change in Mongolia

The future of Iranian wetlands under climate change

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