气候变化领域集成服务门户(CCPortal): Satellite-based daily lake areas in the Yangtze Basin, China, 2000-2011

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.841056
	Satellite-based daily lake areas in the Yangtze Basin, China, 2000-2011
	Wang; Jida; Sheng; Yongwei; Tong; Tak Shun D
发布日期	2014-12-27
数据集类型	dataset
英文简介	The Yangtze River Basin downstream of China's Three Gorges Dam (TGD) (thereafter referred to as "downstream" basin) hosts the largest cluster of freshwater lakes in East Asia. These lakes are crucial water stocks to local biophysical environments and socioeconomic development. Existing studies document that individual lakes in this region have recently experienced dramatic changes under the context of enduring meteorological drought, continuous population growth, and extensive water regulation since TGD's initial impoundment (i.e., June, 2003). However, spatial and temporal patterns of lake dynamics across the complete downstream Yangtze basin remain poorly characterized. Using daily MODIS imagery and an advanced thematic mapping scheme, this study presents a comprehensive monitoring of area dynamics in the downstream lake system at a 10-day temporal resolution during 2000-2011. The studied lakes constitute ~76% (~11,400 km2) of the total downstream lake area, including the entire +70 major lakes larger than 20 km2. The results reveal a decadal net decline in lake inundation area across the downstream Yangtze Basin, with a cumulative decrease of 849 km**2 or 7.4% from 2000 to 2011. Despite an excessive precipitation anomaly in the year 2010, the decreasing trend was tested significant in all seasons. The most substantial decrease in the post-TGD period appears in fall (1.1%/yr), which intriguingly coincides with the TGD water storage season. Regional lake dynamics exhibit contrasting spatial patterns, manifested as evident decrease and increase of aggregated lake areas respectively within and beyond the Yangtze Plain. This contrast suggests a marked vulnerability of lakes in the Yangtze Plain, to not only local meteorological variability but also intensified human water regulations from both the upstream Yangtze main stem (e.g., the TGD) and tributaries (e.g., lakes/reservoirs beyond the Yangtze Plain). The produced lake mapping result and derived lake area dynamics across the downstream Yangtze Basin provides a crucial monitoring basis for continuous investigations of changing mechanisms in the Yangtze lake system.
空间范围	Median Latitude: 30.226667 * Median Longitude: 113.523333 * South-bound Latitude: 29.000000 * West-bound Longitude: 111.370000 * North-bound Latitude: 32.580000 * East-bound Longitude: 116.300000
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215477
推荐引用方式 GB/T 7714	Wang,Jida,Sheng,et al. Satellite-based daily lake areas in the Yangtze Basin, China, 2000-2011.2014-12-27.https://doi.org/10.1594/PANGAEA.841056.