Plant phenological responses to the warm island effect in the lake group region of the Badain Jaran Desert, northwestern China

Zhao, Liqiang; Xu, Xingbin; Niu, Zhenmin; Zhang, Wenjia; Wang, Nai’ang

doi:10.1016/j.ecoinf.2020.101066

Cited by 9 publications

(6 citation statements)

References 77 publications

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“…Previous studies have posited that the lakes in the Badain Jaran Sand Sea are mainly recharged by groundwater [12,48,49], which is consistent with the findings of Zhang et al [32]. Moreover, precipitation in the lake area is known to be scarce [50,51]. The observations by Ma et al [21] with respect to the EC system show that almost all of the rain that falls on the dunes evaporates, which leads to very little replenishment of the water content of the mega-dunes.…”

Section: Lakes and Their Influence On The Environment Of Basinssupporting

confidence: 74%

Contribution of Lake-Dune Patterning to the Dune Height of Mega-Dunes in the Badain Jaran Sand Sea, Northern China

Niu¹,

Wang²,

Meng³

et al. 2021

Remote Sensing

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Mega-dunes in the lake group area of the Badain Jaran Sand Sea, China, are generally taller than dunes in the non-lake group area. This spatial distribution of dune heights may provide a new perspective on the controversy regarding the dunes’ formation mechanism. In this study, we calculated the relative heights and slopes of individual dunes based on a digital elevation model, and we confirmed the height distribution of abnormally tall dunes in the lake group area of the sand sea. It was also found that slopes of more than 10° in the lake group area are more common than those in the non-lake group area. Based on meteorological observations, coupled with the measurement of water content in the sand layers, we propose a conceptual model demonstrating that moisture exchange between the lakes and soil via non-rainfall water will humidify dune slopes and form a more favorable accumulation environment for aeolian sand, thus increasing dune heights. Although long-term observations are yet to be carried out, the present study can be used as evidence for understanding the basis of dune formation in the lake group area and assessing groundwater utilization in deserts.

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Section: Lakes and Their Influence On The Environment Of Basinssupporting

confidence: 74%

Contribution of Lake-Dune Patterning to the Dune Height of Mega-Dunes in the Badain Jaran Sand Sea, Northern China

Niu¹,

Wang²,

Meng³

et al. 2021

Remote Sensing

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“…Runoff from other areas can provide water resources in some areas (such as ALN areas) to sustain ecosystem water balance (P. Chen et al., 2023). The vegetation in these areas received more anthropogenic intervention and attention, which enhanced its ability to regulate precipitation deficits (T. Wang et al., 2021; X. Wang et al., 2023). In contrast, more critical is the unsustainable shift from natural balance (WSS > 0) to imbalance (WSS < 0) of ecosystem water supply to demand in rainfed ecosystems.…”

Section: Methodsmentioning

confidence: 99%

Locating Hydrologically Unsustainable Areas for Supporting Ecological Restoration in China's Drylands

Fu,

Wang,

et al. 2024

Earth's Future

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China has undertaken extensive ecological restoration (ER) projects since the late 1970s in drylands, dominating the greening of drylands. The greening, especially ER‐induced, can affect regional water availability and even cause hydrological unsustainability (i.e., lead to a negative shift in ecosystem water supply and demand balances). However, there is still limited research on accurately identifying the hydrologically unsustainable greening areas (GA) in China's drylands. Here, we developed an ecosystem water supply‐demand indicator, namely, the water self‐sufficiency (WSS), defined as the ratio of water availability to precipitation. Using remote sensing and multisource synthesis data sets combined with trend analysis and time series detection, we conducted a spatially explicit assessment of the hydrological sustainability risk of greening in China's drylands in the context of ER projects over the period 1987–2015. The results showed that 17.15% (6.36 × 104 km2) of the GA faced a negative shift in the WSS (indicating hydrological unsustainability), mainly in Inner Mongolia, Shanxi, and Xinjiang provinces, driven by evapotranspiration. Moreover, 29.34% (1.09 × 105 km2) of the GA, whose area is roughly double that of hydrologically unsustainable GA, exhibited a potential water shortage with a significant WSS decline (−0.014 yr−1), concentrated in Inner Mongolia, Shaanxi, and Gansu provinces. The reliability of our findings was demonstrated through previous studies at the local scale and an analysis of soil moisture changes. Our findings offer precise grid‐scale identification of the hydrologically unsustainable GA, providing more specific spatial guidance for ER implementation and adaptation in China's drylands.

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“…Modern observations suggest that the evaporation of lakes is closely correlated with air temperature and water temperature in the BJD (Han et al, 2018). Due to the warm island effect of lakes in the BJD, the annual temperature in the lake group region is approximately 1.6 °C higher than those in other regions (Liang et al, 2020), which may cause a more intense evaporation effect. When the enhancement of the evaporation effect caused by the temperature rise is much greater than the increased precipitation, the effective moisture decreases (Li et al, 2016;Wu et al, 2020).…”

Section: The Factors Influencing Lake Evolutionmentioning

confidence: 95%

“…In the context of global warming (Neukom et al, 2019), lake surface water temperatures have increased worldwide at a global average rate of 0.34 °C decade −1 , and global annual mean lake evaporation rates are forecast to increase 16% by 2,100 relative to 2006-2015 (Woolway et al, 2020). Arid zones are more sensitive than other areas to temperature changes during global climate change, especially desert areas (Chen et al, 2015;Huang et al, 2016;Liang et al, 2020). Remote sensing data show that the lake areas in the BJD and central Asia have decreased in recent decades (Zhang et al, 2013;Che et al, 2021).…”

Section: The Factors Influencing Lake Evolutionmentioning

confidence: 99%

Hydrological Evolution of a Lake Recharged by Groundwater in the Badain Jaran Desert Over the Past 140 years

et al. 2021

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Understanding the evolution of lakes in arid areas is very important for water resource management. Previous studies have mainly focused on lakes with runoff recharge, while the evolution of groundwater recharge lakes in hyper-arid areas is still less known. In this study, an 86 cm-long sediment core was extracted from Sayinwusu Lake, one of groundwater-recharge lakes in the southeastern Badain Jaran Desert, Northwest China. 210Pb and 137Cs dating, total organic carbon (TOC) and total nitrogen (TN) contents, and mineral content analysis were used to reconstruct the lake evolution over the past 140 years. The evolution of Sayinwusu Lake since 1880 can be divided into two periods. In the first period from 1880 to 1950, the TOC and TN contents were low, and the minerals consisted of all detrital minerals, which indicate that the lake’s primary productivity and salinity were low. During the second period from 1950 to 2018, the contents of TOC, TN, and carbonate minerals increased rapidly at the beginning of the 1950s, indicating that the lake’s primary productivity and salinity increased. Comprehensive analysis of regional climate data suggests that the increase in evaporation caused by rising temperature is an important factor affecting lake evolution in the desert. Although precipitation has increased in the arid region of Northwest China in recent decades with increasing temperature, the enhancement of the evaporation effect is much greater. As a record from groundwater recharge lakes in deserts, our study provides new insight into projecting future lake changes in hyper-arid areas.

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Plant phenological responses to the warm island effect in the lake group region of the Badain Jaran Desert, northwestern China

Cited by 9 publications

References 77 publications

Contribution of Lake-Dune Patterning to the Dune Height of Mega-Dunes in the Badain Jaran Sand Sea, Northern China

Contribution of Lake-Dune Patterning to the Dune Height of Mega-Dunes in the Badain Jaran Sand Sea, Northern China

Locating Hydrologically Unsustainable Areas for Supporting Ecological Restoration in China's Drylands

Hydrological Evolution of a Lake Recharged by Groundwater in the Badain Jaran Desert Over the Past 140 years

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