| 降水,云与大气CO2浓度的年际波动 |
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| 作者姓名： | 李阳春 杨昕 王明星 徐永福 |
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| 作者单位： | 1. 中国科学院大气物理研究所, 大气边界层物理和大气化学国家重点实验室, 北京 100029;
2. 中国科学院研究生院, 北京 100049 |
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| 基金项目： | 中国科学院知识创新工程重大项目(KZCX1SW0116);中国科学院“引进国外杰出人才”项目资助 |
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| 摘 要： | 观测资料显示大气CO2浓度具有非常明显的年际变化.通过分析年平均降水量和夏威夷MaunaLoa站大气CO2浓度的关系,发现大气CO2浓度年际增长量与全球陆地降水的年际增长量成正相关,提出了亚洲季风区云量变化对生态系统净生产力(NEP)有显著影响的假设.利用更高分辨率的月平均温度和降水资料,进一步分析研究大气CO2浓度的年际变化与温度以及降水变化的关系;利用1984～1993年的月平均卫星云资料,研究了云量变化与大气CO2浓度变化关系,结果发现全球CO2浓度年际增长量与低纬度地区陆地上空云量的年际增长量呈同步变化趋势.
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| 关 键 词： | CO2 降水 云 年际增长量 |
| 收稿时间： | 2004-01-02 |
| 修稿时间： | 2004-03-15 |
Precipitation,Cloud and Atmospheric CO2Interannual Variability |
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| Authors: | LI Yang-Chun YANG Xin WANG Ming-Xing XU Yong-Fu |
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| Institution: | 1. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Observation data show large interannual variability of atmospheric CO2.By analyzing yearly mean observation data of global precipitation and atmospheric CO2mixing ratio at Mauna Loa Observatory, we have found a significant positive correlation between the interannual variability of CO2growth rate and the year-to-year changes in global land precipitation.We suggest that this positive correlation results mainly from the influence of clouds in Monsoon areas on terrestrial net ecosystem production (NEP).Here a set of monthly mean data of temperature, precipitation and atmospheric CO2 is used to reanalyze their relationships.In addition, we use satellite-based monthly grid cloud data over the period of 1984～ 1993 to study its relationship with atmospheric CO2 and find that the interannual variability of atmospheric CO2matches cloud cover growth rate. |
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| Keywords: | CO2 precipitation cloud growth rate |
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