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The response of the eastern tropical Indian Ocean(ETIO) to heat fluxes of equal amplitude but opposite sign is investigated using the Community Earth System Model(CESM). A significant positive asymmetry in sea surface temperature(SST) is found over the ETIO—the warming responses to the positive forcing exceeds the cooling to the negative forcing. A mixed layer heat budget analysis is carried out to identify the mechanisms responsible for the SST asymmetry. Results show that it is mainly ascribed to the ocean dynamical processes, including vertical advections and diffusion. The net surface heat flux, on the contrary, works to reduce the asymmetry through its shortwave radiation and latent heat flux components. The former is due to the nonlinear relationship between SST and cloud, while the latter is resulted mainly from Newtonian damping and air-sea stability effects. Changes in the SST skewness are also evaluated, with more enhanced negative SST skewness over the ETIO found for the cooling than heating scenarios due to the asymmetric thermocline-SST feedback. 相似文献
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在获取滇池湿地植物、水质、土壤等数据基础上,结合高分辨率卫星遥感影像数据,应用CIS技术,分析滇池湿地演变规律,并从经济、环境、社会、生态4个方面对滇池湿地进行效益评估。结果表明：2011年湿地和植物群落面积占整个环湖带面积的92．2％,与2007年相比,增长率为141．4％,湿地效益评估总价值增加了34．39亿元,滇池生态环境得到逐步改善。 相似文献
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