在蒙古的近地CO2的时空空间变化及其影响因素
Terigelehu Te1, Hasi Bagan1, Meihui Che1
1School of Environmental and Geographical Sciences, Shanghai Normal University, Shanghai, 200234, China.
Environmental research
|July 31, 2023
概括
蒙古的二氧化碳 (CO2) 含量从2010年到2019年每年增加了2.24 ppmv,其中高比沙漠的度最高. 植被吸收量因季节性变化而有所不同,影响了碳捕获估计.
科学领域:
- 大气科学 大气科学
- 环境科学环境科学
- 气候科学是气候科学.
背景情况:
- 表面附近的二氧化碳 (CO2) 度表现出显著的空间时间变化.
- 了解二氧化碳动态对于气候变化研究和生态系统管理至关重要.
研究的目的:
- 研究2010年至2019年蒙古近地二氧化碳度的时空空间变化.
- 分析影响蒙古四个不同气候区二氧化碳度的因素.
- 评估二氧化碳水平,植被参数和碳捕集能力之间的关系.
主要方法:
- 温室气体观测卫星 (GOSAT) CO2数据的验证,使用世界温室气体数据中心 (WDCGG) 的地面观测.
- 在科本-盖格尔气候区 (BWh, BSk, Dw, ET) 中分析了二氧化碳度趋势,空间分布和季节性变化.
- 对二氧化碳度与植被指数 (NDVI,GPP,LAI) 之间的相关性分析,以了解碳吸收.
主要成果:
- 蒙古的二氧化碳度从2010年的389.48 ppmv稳步增加到2019年的409.72 ppmv (2.24 ppmv/年增长率).
- 东南戈壁沙漠地区的年平均二氧化碳度最高,而西北草原的增长率最高.
- 二氧化碳度在春季达到峰值,夏季达到最低,在光合作用高峰期 (夏季) 与植被参数有负相关性,在较低封存期 (春季,秋季) 与植被参数有正相关性.
结论:
- 蒙古在2010年至2019年间经历了近地表面二氧化碳度的持续上升.
- 观察到二氧化碳水平的显著空间和季节性变化,受气候区和植被活动的影响.
- 调查结果强调了考虑不同生态系统中的植被碳捕获能力的重要性,以准确地估计碳预算.
相关概念视频
Variation of Atmospheric Pressure
2.2K
Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...
2.2K
Other Factors Affecting Respiration Centers
904
Breathing is primarily an involuntary activity regulated by the brainstem respiratory centers. However, it can also be consciously controlled, allowing us to hold our breath or take deeper breaths when needed. This voluntary control is facilitated by the cerebral motor cortex, which bypasses the medullary centers to stimulate the respiratory muscles directly.
However, the ability to hold one's breath voluntarily is not limitless. When the CO2 concentration in the blood reaches a critical...
However, the ability to hold one's breath voluntarily is not limitless. When the CO2 concentration in the blood reaches a critical...
904
Factors Affecting Pulmonary Ventilation
1.4K
Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
1.4K
Global Climate Change
24.5K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.5K
Factors Affecting Respiration
5.3K
Respiration is a crucial physiological function involving exchanging oxygen (O2) and carbon dioxide (CO2) between an organism and its environment. Various factors can impact this essential process:
5.3K
Assessment of Diffusion and Perfusion
1.0K
Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this...
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this...
1.0K


