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	1. Interannual variation of the low-level atmospheric eddy kinetic energy over the South China Sea and its relationship with the tropical cyclone formation number
	WANG Lei
	Earth Science 10 February 2018
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	Abstract:Eddy kinetic energy (EKE) is one key dynamic parameter to characterize atmospheric circulations and synoptic-scale disturbance activities. Investigation of the distribution and variability of atmospheric EKE and related energy conversion components over the South China Sea (SCS) can help us to better understand the dynamics of the SCS monsoon and tropical cyclone (TC) formation in this region. We present our investigation on the interannual variations of low-level (850-hPa) atmospheric EKE over the SCS in this study. Both northern and southern SCS experienced prominent interannual variation in the 850-hPa EKE during their most active EKE months. The energy processes for generation and maintenance of the EKE were analyzed based on the EKE tendency equation. Results suggested that the barotropic energy conversion (BEC) term made the largest contribution to the interannual variation of the EKE over both northern and southern SCS. The interannual variation of the BEC over the southern SCS was mainly modulated by the El Ni?o-Southern Oscillation (ENSO) and had a close anti-correlated relationship with the sea surface temperature (SST) in the eastern equatorial Pacific. In contrast, the interannual variation of the BEC over the northern SCS was identified to be closely associated with the zonal SST gradient between the central equatorial Pacific and northern Indian Ocean. The atmospheric circulation anomalies in responses to SST anomalies enhanced the zonal wind shear over the SCS, giving rise to more BEC. The interannual variation of the BEC over the southern SCS was positively correlated with the TC formation number, with more (less) TCs formed during enhanced (suppressed) BEC years. However, the correlation between the BEC and TC formation number over the northern SCS was not significant, which may be due to the offsetting effects on TC formation by the cooling (warming) of the local SST during enhanced (suppressed) BEC years. These results could improve our understanding of the behaviors and causes of interannual variation in the low-level atmospheric EKE and its relationship with interannual variation of the TC formation number over the SCS. The results highlighted the differences in the regional climate variability between the northern SCS and the southern SCS. ?????
	TO cite this article:WANG Lei. Interannual variation of the low-level atmospheric eddy kinetic energy over the South China Sea and its relationship with the tropical cyclone formation number[OL].[10 February 2018] http://en.paper.edu.cn/en_releasepaper/content/4743499


	2. Deuterium Excess in Precipitation Indicating Vapor Origins over Southwest China
	ZHANG Xinping,ZHANG Xinzhu,WU Huawu,HUANG Yimin
	Earth Science 04 January 2011
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	Abstract:In order to reveal the vapor origins of generating precipitation over southwest China, the variations of stable isotopes including deuterium excess d and the relationships of the stable isotopes with temperature and humidity at Mengzi, Tengchong and Puer sampling stations are analyzed. Under the monsoon system, d in precipitation has distinct seasonality with lower values in the rainy season and higher values in the dry season. Analyses show that the relationship of d in precipitation with temperature and humidity in the middle and low troposphere has consistency. If taking into account the relationships of d and δ18O in precipitation with atmospheric humidity synthetically, it can be deduced that the main causation of affecting stable isotopic variations in precipitation over southwest China is related to the property of rainfall air mass, whereas the evaporation enrichment action in falling raindrop is relatively light. In the rainy season of southwest China, the vapor of generating precipitation, with high humidity, low stable isotopic ratios owing to the rainout of vapor on the transport way, and small d-values in precipitation, is primarily from low-latitude oceans; in the dry season, the vapor of generating precipitation, with low humidity, great stable isotopic ratios and high d-values in precipitation, is primarily from the westerlies transportation and the replenishment of re-evaporated vapor in inland.
	TO cite this article:ZHANG Xinping,ZHANG Xinzhu,WU Huawu, et al. Deuterium Excess in Precipitation Indicating Vapor Origins over Southwest China[OL].[ 4 January 2011] http://en.paper.edu.cn/en_releasepaper/content/4403978


	3. Methane Hydrates and Future Climate
	Li Fangxing,Zunfeng Liu,Dongpoing Liu,Ruimin Sun,Jun Chen
	Earth Science 31 October 2005
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	Abstract:The formation and release of methane hydrates, an important way of carbon cycle which follows a certain rule, has led to glacial-interglacial climate cycles. But up till now, no model can satisfactorily consistent explain the influence of methane hydrates cycle on the glacial-interglacial climate cycles. In this paper, a model is built to explain how this process works. As we all know, for life to continue, carbon must be recycled. The formation of coal and oil decreased the amount of cycling carbon, while the formation and release of methane hydrates can ensure the carbon cycle to proceed; therefore, we don’t have to worry about the increase in the atmospheric concentration of CO2.
	TO cite this article:Li Fangxing,Zunfeng Liu,Dongpoing Liu, et al. Methane Hydrates and Future Climate[OL].[31 October 2005] http://en.paper.edu.cn/en_releasepaper/content/3414

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