Numerical Study of the Interaction between Oasis and Urban Areas within an Arid Mountains-Desert System in Xinjiang, China

Cai, Peng; Hamdi, Rafiq; He, Haijun; Luo, Geping; Wang, Jin; Zhang, Miao; Li, Chaofan; Termonia, Piet; Maeyer, Philippe De

doi:10.3390/atmos11010085

Cited by 9 publications

(4 citation statements)

References 53 publications

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“…Our findings reinforced previous results by showing that warming and drying is more pronounced in oases, where human population centers are concentrated. In recent decades, due to the rapid economic development in Xinjiang and the adjustment of industrial structure, the expansion of oases and the process of urbanization have accelerated [29]. The areal extent of oases in Xinjiang increased by 35% in 1990-2008, severely squeezing the area of the transitional zone between oases and deserts, which decreased by 43% [30].…”

Section: Pronounced Warming and Drying Trends In Oasesmentioning

confidence: 99%

High Mountains Becoming Wetter While Deserts Getting Drier in Xinjiang, China since the 1980s

Zhang

Liu

et al. 2021

Land

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Climate change has been thought to drive the accelerated expansion of global drylands. However, many studies reveal that Arid Central Asia (ACA) has been warming and wetting in recent decades, representing an anomalous response to global climate change. Given that ACA is composed of complex ecosystems and landforms, it is not clear whether or not this trend is uniform in this topographically heterogenous region. Here, we integrate the Google Earth Engine and ERA5-Land reanalysis data to study the trend of changes, since the 1980s, in temperature and precipitation in the Tianshan Mountains and the surrounding deserts, collectively referred to as the Tianshan and Desert Ecozone, which is in Northwest China. Our results show that only 20.4% of this area is becoming both warmer and wetter, which occurs mainly in the altitudes above 2800 m (Tianshan Ecozone). All three alpine ecosystems (coniferous forests, alpine meadow, and nival zone) in the Tianshan Ecozone exhibit similar warming and wetting trends, including of elevation-dependent wetting on the specific altitude range. In contrast, the low-lying oasis where human activities are mostly concentrated is undergoing warming and drying, which will face a greater threat of drought projected under three emissions scenarios (SSP1-2.6, SSP2-4.5, and SSP5-8.5). These results highlight the importance of considering the differences of climate change in different altitude gradients and different ecosystems when studying climate change in drylands.

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Section: Pronounced Warming and Drying Trends In Oasesmentioning

confidence: 99%

High Mountains Becoming Wetter While Deserts Getting Drier in Xinjiang, China since the 1980s

Zhang

Liu

et al. 2021

Land

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“…The ALARO model (Termonia et al, 2018) has proven to be a state-of-the-art climate model, especially for precipitation and its extremes (De Troch et al, 2013;Giot et al, 2016). While previous efforts with ALARO focused on Belgium and Europe, ALARO was also found to be very reliable for central Asia (Top et al, 2021;Vannoppen et al, 2020) and China (Cai et al, 2020;Yang et al, 2020;Zhang et al, 2020).…”

Section: Data: Alaro-0 Model Simulationmentioning

confidence: 99%

Topoclimate and diurnal cycle of summer rain over the Ethiopian highlands in a convection‐permitting simulation

Negash,

Van Schaeybroeck,

Termonia

et al. 2023

Intl Journal of Climatology

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Topoclimate, orographically enhanced rain on windward slopes and leeward rain shadows, control rainfall variability in tropical mountains. Such variability may cause a substantial societal impact in populated highlands such as in Ethiopia. This study aims at understanding the rainfall diurnal cycle and the orographic driving factors over the Ethiopian highlands using the ALARO‐0 regional climate model at convection‐permitting resolution, over a period of 21 years. While the evaluation against satellite‐based observations shows a too early onset of the model diurnal cycle and a too low nocturnal rainfall, several conclusions can be drawn from the model simulations presented here. Elevation is the most important determining factor for modelled rainfall with increased average rainfall and rainfall per rainfall event towards higher elevations. Ethiopia's simulated summer rain exhibits a pronounced diurnal cycle with the highest rainfall occurring during the early afternoon hours and the minimum values occurring in the late night. Average rainfall and rainfall per rainfall event are substantially larger on the windward sides than on the leeward sides of the mountains, except during the peak hours. The diurnal cycles of temperature and humidity start earlier in the morning and recede later than the cycles of wind speed and rainfall. Moreover, rainfall peaks occur earlier in the day at higher elevations, and at night in valleys and in Afar Triangle. Rain intensities around noon on the leeward side are slightly higher than those on the windward side of the highest mountains (>3000 m). This could be due to delayed onset of cloudiness and larger morning insolation on the leeward side of the mountain, but this needs further study. The prevalence of windward over leeward rainfall, the stark contrast in wind‐speed diurnal cycle between windward and leeward slopes, and the early peak hour of surface air and dew point temperature all point towards temperature‐induced rather than wind‐induced convection. These differences are likely to determine hydrology and vegetation distribution, and farmers economy at large. Hence, the need for a way out from the ‘one‐size‐fits‐all’ agro‐ecosystem management approach towards a site‐specific policy that takes into account climatic differences.

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“…SURFEX allows for exchanges between the surface and the atmosphere through a standardized interface (Best et al, 2004), which leads to the possibility of running it either in offline mode or with coupling to atmospheric model ALARO (Le Moigne et al, 2009). The regional climate model ALARO-SURFEX has been validated for a climate simulation and proved reliable to represent the regional climate and land surface process in Europe (Berckmans et al, 2017;Hamdi et al, 2014) and northwestern China (Cai et al, 2020). The regional climate model was driven by ERA-Interim reanalysis data set with spatial resolution of 0.75° × 0.75° (Dee et al, 2011).…”

Section: 1029/2020jd032638mentioning

confidence: 99%

Impacts of Historical Land Use/Cover Change (1980–2015) on Summer Climate in the Aral Sea Region

Hamdi

Cai

et al. 2021

JGR Atmospheres

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Land surface processes form a dynamic boundary interface within the climate system (Pielke & Niyogi, 2010). Land surface characteristics determine the surface energy balance by assigning the distribution of net radiation into sensible, latent, and ground heat fluxes (Dickinson, 1983). Surface fluxes not only affect temperature and humidity, but also influence wind field and local circulation pattern (Pielke & Niyogi, 2009). Therefore, the land use/cover change (LUCC) is one of the driving forces of the regional and global climate change (Cao et al., 2015; Stocker et al., 2014). LUCC can affect global and regional climate by means of changing biogeochemistry and biogeophysical properties of terrestrial surface and its associated effect on atmosphere (Kabat et al., 2004). The biogeochemistry effects of LUCC on global climate in terms of greenhouse gas (GHG) emission and carbon assimilation are well studied in the literature (Li, Zhang, et al., 2015; Meinshausen et al., 2009). According to the IPCC AR5, GHG has caused a 0.5-1.3 °C average global surface warming from 1951 to 2012 (Brovkin et al., 2004; Lawrence et al., 2012). However, the climate response to changing biogeophysical properties of terrestrial surface still exits uncertainty, due to regional climate change can be dampened or enhanced by changes in local land surface parameters which depends on the location and the season (

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Numerical Study of the Interaction between Oasis and Urban Areas within an Arid Mountains-Desert System in Xinjiang, China

Cited by 9 publications

References 53 publications

High Mountains Becoming Wetter While Deserts Getting Drier in Xinjiang, China since the 1980s

High Mountains Becoming Wetter While Deserts Getting Drier in Xinjiang, China since the 1980s

Topoclimate and diurnal cycle of summer rain over the Ethiopian highlands in a convection‐permitting simulation

Impacts of Historical Land Use/Cover Change (1980–2015) on Summer Climate in the Aral Sea Region

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