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| 1 | 大气CO_(2)浓度非均匀分布及其对地表升温影响的研究进展与展望显示文摘在气候变化和全球治理挑战日益严峻的背景下,CO_(2)排放及代价评估日益受到学术界和决策者的关注。当前全球范围包括联合国政府间气候变化专门委员会(IPCC)评估在内的几乎所有研究都是基于全球平均CO_(2)浓度来驱动气候模式的,但基于全球CO_(2)平均分布设定开展模拟影响评估在学术界多有争议。首先,综述了大气CO_(2)非均匀分布的证据,评述了大气CO_(2)浓度非均匀分布与地表升温过程的互馈机制。其次,从自然和人为2个维度,梳理了大气CO_(2)浓度非均匀分布形成的原因,并评估了其对地表升温的影响。最后,评述了当前大气CO_(2)浓度非均匀分布研究中存在的问题,进一步展望了其发展趋势,为把握全球与区域碳排放现状及气候变化影响提供科学判据。 | 张帆 宣鑫 邓祥征 | 2021 | 地球信息科学学报2021，23，8： | 2 |
| 2 | Simulation of Non-Homogeneous CO2 and Its Impact on Regional Temperature in East Asia显示文摘Carbon dioxide(CO_2) is an important greenhouse gas that influences regional climate through disturbing the earth's energy balance. The CO_2 concentrations are usually prescribed homogenously in most climate models and the spatiotemporal variations of CO_2 are neglected. To address this issue,a regional climate model(RegCM4) is modified to investigate the non-homogeneous distribution of CO_2 and its effects on regional longwave radiation flux and temperature in East Asia. One-year simulation is performed with prescribed surface CO_2 fluxes that include fossil fuel emission, biomass burning, air-sea exchange, and terrestrial biosphere flux. Two numerical experiments(one using constant prescribed CO_2 concentrations in the radiation scheme and the other using the simulated CO_2 concentrations that are spatially non-homogeneous) are conducted to assess the impact of non-homogeneous CO_2 on the regional longwave radiation flux and temperature. Comparison of CO_2 concentrations from the model with the observations from the GLOBALVIEW-CO_2 network suggests that the model can well capture the spatiotemporal patterns of CO_2 concentrations. Generally, high CO_2 mixing ratios appear in the heavily industrialized eastern China in cold seasons, which probably relates to intensive human activities. The accommodation of non-homogeneous CO_2 concentrations in the radiative transfer scheme leads to an annual mean change of -0.12 W m^(-2) in total sky surface upward longwave flux in East Asia. The experiment with non-homogeneous CO_2 tends to yield a warmer lower troposphere.Surface temperature exhibits a maximum difference in summertime, ranging from -4.18 K to 3.88 K, when compared to its homogeneous counterpart. Our results indicate that the spatial and temporal distributions of CO_2 have a considerable impact on regional longwave radiation flux and temperature, and should be taken into account in future climate modeling. | Xiaodong XIE Xiaoxian HUANG Tijian WANG Mengmeng LI Shu LI Pulong CHEN | 2018 | Journal of Meteorological Research2018，32，3： | 2 |
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