Changes of meteorological parameters and lightning current during water impounded in Three Gorges area

Yao, Yao; Ruan, Ling; Han, Li; Zhou, Wenjun; Yang, Diyi; Yu, Jing

doi:10.1016/j.atmosres.2013.06.004

Cited by 8 publications

(6 citation statements)

References 16 publications

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“…At the same time, the earth is experiencing a global warming process obviously, particularly after 1980s35. The air temperature of TGR area also has a rising tendency36, which increased by 0.2–1.0°C in 2003–2009 when compared to the average value in 1996–200237. Thus, CH 4 flux in Xiangxi Bay of TGR may decline to some degree over the next decade.…”

Section: Discussionmentioning

confidence: 99%

Methane formation and consumption processes in Xiangxi Bay of the Three Gorges Reservoir

Wang

Xiao

et al. 2014

Sci Rep

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Indoor simulation experiment was carried out to evaluate the formation and consumption rates of methane (CH4) in Xiangxi Bay of the Three Gorges Reservoir (TGR), China. The results show that both the CH4 formation and consumption rates were significantly positively correlated with temperature. CH4 efflux decreased with rising temperature due to its potential increasing oxidation rate. CH4 oxidation in surface sediments accounted for 51.8% of the total production and it even reached to 77.4% at 35°C. The methane oxidation rate in water column ranged from 1.26 to 4.65 mg/(m2h), of which the average and greatest rate accounted for 46.7% and 73.9% of CH4 production respectively under the condition of 30 m water column and 35°C. The methane oxidation may increase by 41.04 mg/(m2h) under average water level of TGR (160 m), and most methane resulted from sediments can be oxidized in the water column.

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Section: Discussionmentioning

confidence: 99%

Methane formation and consumption processes in Xiangxi Bay of the Three Gorges Reservoir

Wang

Xiao

et al. 2014

Sci Rep

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“…In recent years, some climate disaster events have been reported in proximity to the TGR area, which highlight the potential impact of TGR on the climate system. These studies focused on the effect of the TGR on precipitation (Xiao et al , ; Zhao et al , ; Zhao and Shepherd, ; Li et al , , , ), air temperature (Deng et al , ) and thunder characteristics (Yao et al , ). The TGR affected the air temperature of local regions, increasing the temperature in winter and decreasing the temperature in summer (Yao et al , ).…”

Section: Introductionmentioning

confidence: 99%

“…These studies focused on the effect of the TGR on precipitation (Xiao et al , ; Zhao et al , ; Zhao and Shepherd, ; Li et al , , , ), air temperature (Deng et al , ) and thunder characteristics (Yao et al , ). The TGR affected the air temperature of local regions, increasing the temperature in winter and decreasing the temperature in summer (Yao et al , ). Precipitation has increased in the northern area of the TGR and decreased in the southern areas (Wu et al , ; Li et al , , , ), but this may not solely be attributed to TGD (Xiao et al , ; Wu et al , ).…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution and temporal variation of reference evapotranspiration in the Three Gorges Reservoir area during 1960–2013

Chen

Mirza

et al. 2016

Intl Journal of Climatology

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ABSTRACT:Monitoring the spatial distribution of reference evapotranspiration (ET 0 ) and quantifying temporal variations offer valuable information about hydrology, irrigation water requirements and water resources management. Under climate warming and Three Gorges Reservoir (TGR) impoundment conditions, it is critical to survey the ET 0 variation in the Three Gorges Reservoir area (TGRA) China. Temporal and spatial patterns in ET 0 over the TGRA were investigated for the period 1960-2013, based on daily data from 41 meteorological stations. The Mann-Kendall test and Sen's slope estimator were used to examine ET 0 trend. The presence of abrupt changes was checked using the Pettitt test, moving t-test (MTT) and cumulative sum (CUSUM) method. The spatial distribution of the mean annual ET 0 in the TGRA for 1960-2013 shows an east-west gradient structure with low ET 0 in the area south of the TGR (STGR) and high ET 0 in the area downstream of TGR (DTGR). The spatial distribution for post-dam period is similar to that for 1960-2013. Abrupt changes of annual ET 0 over the TGRA occurred in 1982. These changes were mainly related to climate warming in TGRA during the 1980s. ET 0 in the region exhibited an obvious decreasing trend until the early 1980s (1982), at a rate of −1.41 mm a −1 . However, the downward trend reversed in 1982, followed by a rate of increase of 1.11 mm a −1 . For the whole period of 1960-2013, the overall decreasing trend in TGRA was mainly due to downward trend in . During the post-dam period, the upward trends are still more pronounced. The TGR may have some effects on ET 0 at stations that lie in or near the Three Gorges Dam (TGD) in some cases. However, there is no evidence to indicate that the TGD would affect other locations. In general, ET 0 variation is more related to climate change rather than dam-related changes.

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“…However, the affected buffer area was the largest among the four seasons, where it extended to 5 km away from the reservoir boundary while in the other three seasons the impacting buffers were much narrower (~3 km). Our findings of summer cooling and winter warming agree well with the results obtained by Yao et al [] based on ground measurements, but they disagree with the conclusions of Wu et al [] based on climate model simulations, who found that the temperature decreased in both the summer and winter.…”

Section: Results Analysismentioning

confidence: 99%

“…After running a double nested climate model (RegCM3) from 1996 to 2007 at a resolution of 10 km, Wu et al [] concluded that the surface air temperature decreased over the reservoir during both the summer and winter by ~1.5°C and ~1°C, respectively. However, Yao et al [] found cooling in the summer and warming in winter according to meteorological observation data obtained from 2000 to 2009.…”

Section: Introductionmentioning

confidence: 99%

Temperature changes in Three Gorges Reservoir Area and linkage with Three Gorges Project

et al. 2017

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The Three Gorges Project (TGP) is one of the largest hydroelectric projects throughout the world. It has brought many benefits to the society but also led to endless debates about its environmental and climatic impacts. Monitoring the spatiotemporal variations of temperature in the Three Gorges Reservoir Area (TGRA) is important for understanding the climatic impacts of the TGP. In this study, we used remote sensing‐based land surface temperature (LST) and ground‐measured air temperature data to investigate temperature changes in the TGRA. Results showed that during the daytime in summer, LST exhibited significant cooling (1–5°C) in the downstream region of the reservoir, whereas LST during the nighttime in winter exhibited significant warming (1–5°C) across the entire reservoir. However, these cooling and warming effects were both locally constrained within 5 km buffer along the reservoir. The changes in air temperature were consistent with those in LST, with 0.67°C cooling in summer and 0.33°C warming in winter. The temperature changes along the reservoir not only resulted from the land‐water conversion induced by the dam impounding but were also related to the increase of vegetation cover caused by the ecological restoration projects. Significant warming trends were also found in the upstream of TGRA, especially during the daytime in summer, with up to 5°C for LST and 0.52°C for air temperature. The warming was caused mainly by urban expansion, which was driven in part by the population resettlement of TGP. Based on satellite observations, we investigated the comprehensive climatic impacts of TGP caused by multiple factors.

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Changes of meteorological parameters and lightning current during water impounded in Three Gorges area

Cited by 8 publications

References 16 publications

Methane formation and consumption processes in Xiangxi Bay of the Three Gorges Reservoir

Methane formation and consumption processes in Xiangxi Bay of the Three Gorges Reservoir

Spatial distribution and temporal variation of reference evapotranspiration in the Three Gorges Reservoir area during 1960–2013

Temperature changes in Three Gorges Reservoir Area and linkage with Three Gorges Project

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