Analysis of hydrometeorological variations based on the sounding and near-surface observations in Aksu River Basin

doi:10.12006/j.issn.1673-1719.2017.035

Abstract

Abstract:

Based on the ground and sounding meteorological data, the hydrological changes of the Aksu River Basin during 1960-2015 were analyzed, and the role of upper atmosphere climate in runoff reproducing was discussed. The results show that under the background of global warming, the surface air temperature in Aksu River Basin increased significantly with an rate of 0.18℃/10a (ranging from -0.09 to 0.43℃/10a), and the precipitation increased at a rate of 10.42 mm/10a (ranging from 2.23 to 21.11 mm/10a). For the climate at the upper atmosphere, the 0℃ level heights of Almaty, Yining and Kuqa generally increased, and the increase reached 88.9 m, 29.4 m and 7.2 m in 1990-2015 compared to those in 1960-1989, respectively. The combination of near surface air temperature and precipitation and upper 0℃ level heights can significantly improve the reproducing performance of summer runoff in the Aksu River Basin.

Key words: Climate change, Upper atmosphere climate, 0℃ level height, Aksu River Basin

Zhi-Cheng WANG, Gong-Huan FANG, Hui ZHANG, Wan-Jiang LI, Ya-Ning CHEN, Hong-Hua ZHOU. Analysis of hydrometeorological variations based on the sounding and near-surface observations in Aksu River Basin[J]. Climate Change Research, 2018, 14(1): 1-10.

Figures/Tables 8

Fig. 1 Topographical conditions and meteorological and hydrological stations of the Aksu River Basin and its location in China

Table 1 Meteorological and hydrological stations in the Aksu River Basin

Table 2 Annual and seasonal changes and trends of near-surface air temperature and precipitation in Aksu River Basin during 1960-2015

Fig. 2 Variation of temperature for different standard isobaric surfaces during 1960-2015 of Almaty, Yining and Kuqa sounding stations

Fig. 3 Seasonal variations of temperature for different standard isobaric surfaces of the Almaty,Yining and Kuqa sounding stations (1990-2015 and 1960-1989 means)

Fig. 4 Annual (only for June, August and September) and seasonal (from May to September) variations of 0℃ level height of Almaty, Yining and Kuqa sounding stations during 1960-2015

Fig. 5 Intra and inter annual variation of streamflow of the Kumalik River and the Toxgan River in the Aksu River Basin during 1960-2015

Fig. 6 Observed and simulated summer streamflows of the Toxgan River (Shaliguilanke) and the Kumalik Rvier (Xiehala hydrological station)

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