Dynamics of aeolian sandy land in the Yarlung Zangbo River basin of Tibet, China from 1975 to 2008

Weishou, Shen; Li, Haidong; Sun, Mingdong; Jiang, Jiang

doi:10.1016/j.gloplacha.2012.01.012

Cited by 78 publications

(74 citation statements)

References 20 publications

(26 reference statements)

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“…), and the average elevation is 4600 m. The YZR basin can be divided into three sub-areas (upstream, midstream, and downstream) and the climatic conditions differ greatly in different sub-areas [37]. The upstream region is defined as the area between Chemayungdung Glacier and Lizi, and is located within a cold and dry temperate steppe climate zone with a multi-year average precipitation of <300 mm.…”

Section: Study Areamentioning

confidence: 99%

Elevation-Dependent Vegetation Greening of the Yarlung Zangbo River Basin in the Southern Tibetan Plateau, 1999–2013

Weishou

et al. 2015

Remote Sensing

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Abstract:The Yarlung Zangbo River basin is an important alley to transport moisture from the Indian Ocean to the inner Tibetan Plateau. With a wide range of elevations from 147 m to over 7000 m above sea level (a.s.l.), ecosystems respond differently to climate change at various elevations. However, the pattern of elevation-dependent vegetation change and how it responds to recent warming have been rarely reported. Here, we investigated the pattern of vegetation greening at different elevations in this river basin using SPOT normalized difference vegetation index (NDVI) data during 1999-2013, and examined its relationship with elevation-dependent changes in temperature and precipitation. The annual NDVI has increased by 8.83% from 1999 to 2013. In particular, the NDVI increased more apparently at lower elevations, but remained relatively stable or even decreased at high elevations. It seems that rising temperature has driven the basin-wide vegetation greening, but the greening rate is in contrast to the pattern of elevation-dependent warming (EDW) with more significant temperature increase at higher elevations. It appears that decreasing precipitation does not reverse the overall increasing trend in NDVI, but relatively limited precipitation (<500 mm) may constrain the NDVI increases, causing apparently stable or even decreased NDVI at higher elevations (>4000 m).

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Section: Study Areamentioning

confidence: 99%

Elevation-Dependent Vegetation Greening of the Yarlung Zangbo River Basin in the Southern Tibetan Plateau, 1999–2013

Weishou

et al. 2015

Remote Sensing

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“…The derived SWD has a discontinuous and patchy distribution, which is consistent with Li et al (1999), Dong et al (1999) and Shen et al (2012). However, none of the former studies revealed the diurnal and seasonal SWD variations with different satellite sensors which have similar spatial resolution.…”

Section: Determination Of Swdi From Avhrr and Modis Data By Using Sebsupporting

confidence: 84%

“…The YZR and its two tributaries are the activity center of the Tibetan people and local cultivated land is mainly in the valley. Local population has doubled since 1950s (Shen et al 2012). As the orientation of the river valley is nearly parallel to the wind direction, the mountainous terrains greatly rise the wind velocity.…”

Section: Determination Of Swdi From Avhrr and Modis Data By Using Sebmentioning

confidence: 99%

“…Thus, the YZR valley has favorable environmental conditions that are necessary for the development of aeolian sand landforms. With the impact of excessive use of valley land and special terrain and vegetation conditions, the land desertification trend has become increasing serious (Shen et al 2012). The bare sand area including migratory dune cover about 112,000 hectares which is almost equivalent to two-thirds of the arable land in YZR and its two tributaries.…”

Section: Determination Of Swdi From Avhrr and Modis Data By Using Sebmentioning

confidence: 99%

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Land-atmosphere interactions and their relationships to the Asian monsoon in the Tibetan plateau

Zhong

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“…The 25 climate from upstream to downstream regions of the basin exhibits an obvious difference due to the location and the topographical feature of the TP (Liu et al, 2014). The downstream area has a warm and humid subtropical climate; the midstream area has a temperate forest-grassland climate and the upstream valley has a cold and dry temperate steppe climate (Liu et al, 2007;Shen et al, 2012). The average annual temperature in this basin is about 6.27 ℃.…”

Section: Study Area 20mentioning

confidence: 99%

Potential application of hydrological ensemble prediction in forecasting flood and its components over the Yarlung Zangbo River Basin, China

Liu¹,

Pan²,

Bai³

et al. 2018

Preprint

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Abstract. In recent year, flood becomes a serious issue in Tibetan Plateau (TP) due to climate change. Many studies have shown that ensemble flood forecasting based on numerical weather predictions can provide early warning with extended lead time. However, the role of hydrological ensemble prediction in forecasting flood volume and its components over the 10 Yarlung Zangbo River Basin (YZR), China has not been systematically investigated. This study adopts Variable Infiltration Capacity (VIC) model to forecast annual maximum floods (MF) and annual first floods (FF) in YZR based on precipitation, maximum and minimum temperature from European Centre for Medium-Range Weather Forecasts (ECMWF). Nsimulations is proposed to account for more scenarios of parameters in VIC and shows improved flood simulation. Ensemble flood forecasting system can skilfully predict MF with a lead time of more than10 days, and has skill in forecasting the 15 snowmelt-related components in about 7 days ahead. The accuracy of forecasts for FF is inferior with a lead time of only 5 days. The performance in 7-day accumulated flood volumes is better than the peak flows. The components in baseflow for FF are irrelevant to lead time, whilst for MF an obvious deterioration in performance with lead time can be perceived. The snowmelt-induced surface runoff is the most poorly captured component by the system, and the well-predicted rainfallrelated components are the major contributor for good performance. From this study, it is concluded that snowmelt-induced 20 flood volume plays an important role in YZR Basin especially in FF.

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Dynamics of aeolian sandy land in the Yarlung Zangbo River basin of Tibet, China from 1975 to 2008

Cited by 78 publications

References 20 publications

Elevation-Dependent Vegetation Greening of the Yarlung Zangbo River Basin in the Southern Tibetan Plateau, 1999–2013

Elevation-Dependent Vegetation Greening of the Yarlung Zangbo River Basin in the Southern Tibetan Plateau, 1999–2013

Land-atmosphere interactions and their relationships to the Asian monsoon in the Tibetan plateau

Potential application of hydrological ensemble prediction in forecasting flood and its components over the Yarlung Zangbo River Basin, China

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