Abstract：
Photosynthesis in vegetation is one of the key processes in maintaining regional ecological balance and climate stability, and it is of significant importance for understanding the health of regional ecosystems and addressing climate change. Based on 2001-2021 Global OCO-2 Solar-Induced Fluorescence (GOSIF) dataset, this study analyzed spatiotemporal variations in Asian vegetation photosynthesis and its response to climate and human activities. Results show the following: (1) From 2001 to 2021, the overall photosynthetic activity of vegetation in the Asian region has shown an upward trend, exhibiting a stable distribution pattern with higher values in the eastern and southern regions and lower values in the central, western, and northern regions. In specific regions such as the Turgen Plateau in northwestern Kazakhstan, Cambodia, Laos, and northeastern Syria, photosynthesis significantly declined. (2) Meteorological factors influencing photosynthesis exhibit differences based on latitude and vertical zones. In low-latitude regions, temperature is the primary driver, while in mid-latitude areas, solar radiation and precipitation are crucial. High-latitude regions are primarily influenced by temperature, and high-altitude areas depend on precipitation and solar radiation. (3) Human activities (56.44%) have a slightly greater impact on the dynamics of Asian vegetation photosynthesis compared to climate change (43.56%). This research deepens our comprehension of the mechanisms behind the fluctuations in Asian vegetation photosynthesis, offering valuable perspectives for initiatives in environmental conservation, sustainability, and climate research.
摘要：
植被光合作用是维持区域生态平衡和气候稳定的关键,对于了解区域生态系统的健康和应对气候变化具有重要意义。基于2001-2021年全球OCO-2太阳诱导荧光（GOSIF）数据集，本研究分析了亚洲植被光合作用的时空变化及其对气候和人类活动的响应。结果表明:(1)2001-2021年,亚洲地区植被光合活性总体呈上升趋势,表现出稳定的分布格局，东部和南部地区的值较高，中部地区的值较低，西方,和北部地区。在哈萨克斯坦西北部的图尔根高原等特定地区，柬埔寨,老挝,叙利亚东北部，光合作用显著下降。（2）影响光合作用的气象因子在纬度和垂直带上存在差异。在低纬度地区，温度是主要驱动因素，而在中纬度地区，太阳辐射和降水至关重要。高纬度地区主要受温度影响,高海拔地区取决于降水和太阳辐射。（3）与气候变化（43.56％）相比，人类活动（56.44％）对亚洲植被光合作用动态的影响稍大。这项研究加深了我们对亚洲植被光合作用波动背后机制的理解，为环境保护倡议提供有价值的观点，可持续性气候研究。
