Phenological changes of evergreen vegetation affect ecosystem functions and land-atmosphere exchanges. Although recent studies have documented changes in the spring onset of photosynthesis derived from satellite solar-induced chlorophyll fluorescence (SOS_SIF) of evergreen vegetation in the Northern Hemisphere, spatial variations in the response of the onset of spring photosynthesis to climate change remain poorly characterized. Using a continuous solar-induced chlorophyll fluorescence dataset, we found that SOS_SIF advanced in more than 70.0% of surveyed areas with evergreen vegetation, represented as pixels and spread widely across the Tibetan Plateau. Warming temperatures contributed to advanced SOS_SIF in more than 42.0% of surveyed areas, mainly in the southeast and areas between 90 and 97 °E. Increasing precipitation contributed to advanced SOS_SIF in about 15.0% of surveyed areas, mainly along the southeastern edge of the plateau. A negative partial correlation between SOS_SIF and temperature ($R_{\mathrm{P}\left(\text{SO}{\mathrm{S}}_{\text{SIF}},\mathrm{T}\right)}$) was observed in more than 65.0% of surveyed areas, and stronger negative $R_{\mathrm{P}\left(\text{SO}{\mathrm{S}}_{\text{SIF}},\mathrm{T}\right)}$ was found in areas with a larger positive interannual correlation between preseason temperature and precipitation, likely due to the better match between favorable temperature and water conditions in these areas. The positive $R_{\mathrm{P}\left(\text{SO}{\mathrm{S}}_{\text{SIF}},\mathrm{T}\right)}$ was likely associated with low water availability. The partial correlation between SOS_SIF and precipitation ($R_{\mathrm{P}\left(\text{SO}{\mathrm{S}}_{\text{SIF}},\mathrm{P}\right)}$) was spatially diverse, with negative $R_{\mathrm{P}\left(\text{SO}{\mathrm{S}}_{\text{SIF}},\mathrm{P}\right)}$ in about half of surveyed areas. Stronger negative $R_{\mathrm{P}\left(\text{SO}{\mathrm{S}}_{\text{SIF}},\mathrm{P}\right)}$ was observed in areas with a stronger negative interannual correlation between preseason precipitation and solar radiation, which was probably caused by the trade-off between water and light availability to maximize the benefits from precipitation. The positive $R_{\mathrm{P}\left(\text{SO}{\mathrm{S}}_{\text{SIF}},\mathrm{P}\right)}$ was likely due to the lack of solar radiation. This study provides new explanations for spatial variations in the response of SOS_SIF to temperature and precipitation, contributing to assessments of vegetation phenology and global carbon cycle modeling.

常绿植被的物候变化影响生态系统功能和陆气交换。尽管最近的研究记录了北半球常绿植被的卫星太阳诱导叶绿素荧光 (SOS _{SIF ) 引起的春季光合作用开始的变化，但春季光合作用开始对气候变化的响应的空间变化特征仍然很差。}使用连续的太阳诱导叶绿素荧光数据集，我们发现 SOS _SIF在超过 70.0% 的常绿植被调查区域中取得进展，以像素表示并在青藏高原广泛传播。气温升高导致高级 SOS _SIF超过 42.0% 的调查区域，主要分布在东南部和 90 至 97 °E 之间的区域。在大约 15.0% 的调查区域中，降水增加导致 SOS _SIF提前，主要是沿着高原的东南边缘。_{SOS SIF}与温度呈负偏相关关系($R_{\mathrm{P}\left(\text{所以}{\mathrm{小号}}_{\text{SIF}},\mathrm{吨}\right)}$)在超过 65.0% 的调查区域中被观察到，并且负面影响更强$R_{\mathrm{P}\left(\text{所以}{\mathrm{小号}}_{\text{SIF}},\mathrm{吨}\right)}$在季前温度和降水之间存在较大正相关的地区被发现，这可能是由于这些地区有利的温度和水条件之间更好的匹配。积极的$R_{\mathrm{P}\left(\text{所以}{\mathrm{小号}}_{\text{SIF}},\mathrm{吨}\right)}$可能与可用水量低有关。_{SOS SIF}与降水偏相关（$R_{\mathrm{P}\left(\text{所以}{\mathrm{小号}}_{\text{SIF}},\mathrm{P}\right)}$) 在空间上是多样化的，负$R_{\mathrm{P}\left(\text{所以}{\mathrm{小号}}_{\text{SIF}},\mathrm{P}\right)}$在大约一半的调查区域。更强的消极$R_{\mathrm{P}\left(\text{所以}{\mathrm{小号}}_{\text{SIF}},\mathrm{P}\right)}$在季前降水和太阳辐射之间的年际负相关性更强的地区观察到，这可能是由于水和光照可用性之间的权衡，以最大限度地利用降水带来的好处。积极的$R_{\mathrm{P}\left(\text{所以}{\mathrm{小号}}_{\text{SIF}},\mathrm{P}\right)}$可能是由于缺乏太阳辐射。这项研究为 SOS _SIF对温度和降水响应的空间变化提供了新的解释，有助于评估植被物候和全球碳循环建模。