Variation of cloud amount over China and the relationship with <scp>ENSO</scp> from 1951 to 2014

Yin-ge, Liu; Wang, Ninglian; Wang, Lingang; Guo, Zhiwen; Wu, Xiaobo

doi:10.1002/joc.4529

Cited by 16 publications

(13 citation statements)

References 42 publications

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“…As seen from Figure 7d, surface-observed TCC keeps increasing during 1993-2015 with an even stronger increase in the latter period, which could not explain the increase in SSR. An increasing trend in TCC since the 1990s is also evidenced over China by Xia [68], Liu et al [69], and Wang et al [5]. Changes in satellite-derived CLARA-A2 SSR are generally in good agreement with the trends of CFC used in CLARA-A2 (Figure 7b,e), suggesting a good representation of cloud effects in the satellite-retrieved SSR, as expected from the satellite-retrievals.…”

Section: A Case Study Of Beijingsupporting

confidence: 71%

Improvement of Air Pollution in China Inferred from Changes between Satellite-Based and Measured Surface Solar Radiation

et al. 2019

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The air pollution crisis in China has become a global concern due to its profound effects on the global environment and human health. To significantly improve the air quality, mandatory reductions were imposed on pollution emissions and energy consumption within the framework of the 11th and 12th Five Year Plans of China. This study takes the first step to quantify the implications of recent pollution control efforts for surface solar radiation (SSR), the primary energy source for our planet. The observed bias between satellite-retrieved and surface-observed SSR time series is proposed as a useful indicator for the radiative effects of aerosol changes. This is due to the fact that the effects of temporal variations of aerosols are neglected in satellite retrievals but well captured in surface observations of SSR. The implemented pollution control measures and actions have successfully brought back SSR by an average magnitude of 3.5 W m−2 decade−1 for the whole of China from 2008 onwards. Regionally, effective pollution regulations are indicated in the East Coast regions of South and North China, including the capital Beijing, with the SSR brightening induced by aerosol reduction of 7.5 W m−2 decade−1, 5.2 W m−2 decade−1, and 5.9 W m−2 decade−1, respectively. Seasonally, the SSR recovery in China mainly occurs in the warm seasons of spring and summer, with the magnitudes induced by the aerosol radiative effects of 5.9 W m−2 decade−1 and 4.7 W m−2 decade−1, respectively.

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Section: A Case Study Of Beijingsupporting

confidence: 71%

Improvement of Air Pollution in China Inferred from Changes between Satellite-Based and Measured Surface Solar Radiation

et al. 2019

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“…This analysis showed no particular correlation between ONI and cloud or aerosol properties; Correlation coefficients were around -0.2 for the entire time series and slightly larger for specific months. A very similar, not significant, anti-correlation between ENSO and low cloud amount was found by Liu et al (2016), examining the entire China and the period 1951-2014.…”

Section: Possible Effects Of Meteorological Variability and Large-scasupporting

confidence: 56%

Satellite observations of aerosols and clouds over southern China from 2006 to 2015: analysis of changes and possible interaction mechanisms

Benas¹,

Meirink²,

Karlsson³

et al. 2018

Preprint

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<p><strong>Abstract.</strong> Aerosol and cloud properties over southern China during the 10-year period 2006&#8211;2015 are analysed based on observations from passive and active satellite sensors and emission data. The results show a decrease in aerosol optical depth over the study area by about 20&#8201;% on average, accompanied by an increase in liquid cloud cover and cloud liquid water path (LWP) by 5&#8201;% and 13&#8201;%, respectively. Analysis of aerosol types and emissions suggests that the main driver for their reduction is a decrease in biomass burning aerosols. These changes occurred mainly in late autumn and early winter months and coincided with changes in cloud properties. For the latter, possible explanatory mechanisms were examined, including changes in circulation patterns and aerosol-cloud interactions. Further analysis of changes in aerosol vertical profiles demonstrates a consistency of the observed aerosol and cloud changes with the aerosol semi-direct effect, which depends on their relative heights. Based on this mechanism, fewer absorbing aerosols in the cloud layer would lead to an overall decrease in evaporation of cloud droplets, thus increasing cloud LWP and cover.</p>

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“…Nationally, total cloud cover experienced a positive trend since the end of the 1990s (Liu, Wang, Wang, et al, ); other research also finds significant increases in total cloud cover in northern China (Xia, ; Zhang et al, ; Zhou et al, ) and increases in low cloud cover in western China (Duan & Xiao, ; Zhang et al, ) that could relate to maintaining soil warmth at night (Pepin & Norris, ). A recent study on changes of diurnal soil surface temperature in the temperate steppe region of north China also found a rapid decrease of SSDTR in the new millennium in winter and proposed the increase of cloud amount as a possible contributor to the change (Liu et al, ), but this analysis was based on data ending in 2007, restricting us from further comparisons.…”

Section: Implications Of the Divergences Between Soil And Air Temperamentioning

confidence: 99%

Maximum and Minimum Soil Surface Temperature Trends Over China, 1965–2014

et al. 2018

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Minimum and maximum soil surface temperatures have shown significant warming trends since the midtwentieth century in China, with minimum temperatures rising at a faster pace than maximums, resulting in a decrease in the soil surface diurnal temperature range. Similar to air temperature, these changes demonstrate spatial coherence, with regions at higher latitudes experiencing relatively more change. While increases in air temperatures in China slowed after 1998, paralleling the global “warming hiatus,” soil temperatures at the surface and in shallow layers have continued to rise across China. The increases in soil surface temperatures are fastest at night since 1998, reducing the soil surface diurnal temperature range. Thus, we find that while the decrease in the diurnal air temperature range mainly happened during the earlier “dimming” period ending around 1988, the decrease in the diurnal soil surface temperature range is detectable only during the renewed dimming period after 1998. This has caused soil temperatures at the surface and in shallow layers to diverge from air temperatures since 1998. Although changes in soil temperatures were associated with changes in air temperature, the patterns of change are different. Calculations using only nonurban stations show similar warming rates, indicating that the effects of urbanization are small.

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Variation of cloud amount over China and the relationship with ENSO from 1951 to 2014

Cited by 16 publications

References 42 publications

Improvement of Air Pollution in China Inferred from Changes between Satellite-Based and Measured Surface Solar Radiation

Improvement of Air Pollution in China Inferred from Changes between Satellite-Based and Measured Surface Solar Radiation

Satellite observations of aerosols and clouds over southern China from 2006 to 2015: analysis of changes and possible interaction mechanisms

Maximum and Minimum Soil Surface Temperature Trends Over China, 1965–2014

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