【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 1 984～ 1 993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 .更多还原

【Abstract】 Observation data show large interannual variability of atmospheric CO 2. By analyzing yearly mean observation data of global precipitation and atmospheric CO 2 mixing ratio at Mauna Loa Observatory, we have found a significant positive correlation between the interannual variability of CO 2 growth 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 CO 2 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 CO 2 and find that the interannual variability of atmospheric CO 2 matches cloud cover growth rate.更多还原