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The MOSIR (Mars Orbiter Subsurface Investigation Radar) is one of the scientific payloads carried by the Tianwen-1 orbiter. MOSIR conducted a ground experiment in the desert near Dengkou County, northern China, before the launch of the Tianwen-1 satellite. The MOSIR prototype was suspended from a hot air balloon and flew over a flat region at an al...
In the Gobi desert region, the predominant frequency of the horizontal-to-vertical spectral ratio (HVSR) curve of seismic noise ( f H / V ) is typically above 3 Hz. However, most of the existing formulas for estimating cover thickness (H) based on f H / V are only applicable for f H / V values below 5 Hz. Therefore, new formulas that can accurately...
Citations
... Breeding areas in Uzbekistan have a semiarid continental climate, with hot summers (August mean 31.4°C), cold winters (January mean −1°C), and 134.5 mm of annual precipitation mostly falling as winter snow and spring showers (37). Wintering Asian houbara avoid areas >1,235 m above sea level, dispersing widely into warm desert landscapes experiencing some winter rainfall (38). ...
Significance
Whether migratory populations are preadapted or constrained in responding to global climate change largely depends on which cues individuals use when deciding to start their migration. The identity of these cues is revealed by whether response thresholds are consistent within, but differ between, individuals (“repeatability”). By satellite tracking 48 individuals across multiple migrations, we show that 1) Asian houbara used the environmental cue of local temperature, which was correlated between wintering and breeding grounds, to time their spring migration departure; 2) departure responses to temperature varied between individuals but were individually repeatable; and 3) individuals’ use of temperature as a cue allowed for adaptive population-level change in migration timing, relative to annual variation in spring temperatures.
... The nonparametric Mann-Kendall statistical (MK) test is used to identify and evaluate trends in the temperature time series in Uzbekistan as well as the duration of SWT [27,28]. The MK test is widely used in scientific research to analyze trends in long-term meteorological series [9,12,14,[29][30][31][32][33]. For this reason, the description of the MK test was not included in the manuscript. ...
Climate change and shrinking of the Aral Sea have significantly affected the region's temperature variations. Observed interannual changes in Uzbekistan's air temperature compared to the duration of synoptic weather types (SWT) in Middle Asia were analyzed. Nonparametric Mann-Kendall statistical test and climate trends coefficients were used to identify trend characteristics of observed temperature from 1961-2016 to the baseline period of 1961-1990. The results showed increasing temperature trends average to 1 • C in warm and cold half years over Uzbekistan. The 1991-2016 decadal temperature trend ranged from 0.25 • C/decade in the northwest to 0.52 • C/decade in the center, especially pronounced in the oasis and Aral Sea zones. There were also significant changes in the structure of regional SWT. The main difference in the structure of SWT in Middle Asia relative to the baseline period was expressed in a decrease of cold mass invasion duration from 113.4 to 76.1 days and an increase in low-gradient baric field duration from 65.8 to 134.6 days. The process of anthropogenic warming, which began in Uzbekistan in the 1960s of the twentieth century, has accelerated from the mid-1970s with a higher mean annual air temperature than the baseline period's climate normals (1961-1990) and is associated with changes in the regional SWT over Middle Asia.
