广东省植被生态质量演变与气象条件贡献分析OA北大核心CSTPCD

The ecological quality of vegetation,characterized by its productivity,biodiversity,and ecosystem services,was influenced by an interplay of meteorological fields and human activities.Conducting a scientifical evaluation of how meteorological fields contributed to changes in vegetation holds critical importance for advancing regional ecological restoration efforts and effectively addressing climate change challenges.Taking Guangdong Province as a case,this study explored the spatiotemporal patterns of vegetation ecological quality and its influence on meteorological fields.Based on the data of Normalized Difference Vegetation Index(NDVI),Fractional Vegetation Cover(FVC),Net Primary Productivity(NPP),and the contribution rate of meteorological conditions provided by the China Meteorological Administration,the spatiotemporal patterns of vegetation ecological quality were investigated and the contribution of meteorological fields to the changes of vegetation in Guangdong was quantified.The results indicated that:1)from 2001 to 2022,the NDVI,FVC,and NPP in Guangdong demonstrated a trend of fluctuating growth,with the annual average ranges of 0.494-0.627,0.594-0.706,and C 831-1.15×103 g∙m-2,respectively.Meanwhile,the multi-annual average values for NDVI,FVC,and NPP were 0.565,0.653,and C 976 g∙m-2,respectively.Additionally,peaks in these indices occurred in 2016(NPP),2021(NDVI),and 2022(FVC),while the lowest points were in 2005(NDVI and FVC)and 2003(NPP).2)Spatial analysis revealed distinct regional distribution patterns of vegetation ecological quality across Guangdong Province as follows:northern Guangdong>northeastern Guangdong>western Guangdong>eastern Guangdong>Pearl River Delta.Notably,cities such as Yangjiang,Zhaoqing,Yunfu,Qingyuan,and Shaoguan exhibited superior vegetation ecological quality,whereas Dongguan and Foshan were characterized by comparatively lower quality.3)Over the past 22 years,meteorological fields had predominantly exerted a positive influence on the ecological quality of vegetation in Guangdong.The overall contribution rate of meteorological fields displayed a fluctuating downward trend,with a rate of decline at-1.60×10-2/a per annum,indicating a general decrease in the impact of meteorological fields on vegetation changes in Guangdong.4)In northern Guangdong,meteorological fields had predominantly positively impacted vegetation,whereas in eastern and western Guangdong,these fields had generally led to negative trends.The impact of meteorological fields on vegetation changes in eastern Guangdong was more pronounced in western Guangdong.In 2007,2017,2018,and 2020-2022,the impact of meteorological fields on the vegetation ecological quality across Guangdong was predominantly negative,and was most detrimental in 2022.The impact of meteorological fields on the vegetation ecological quality in Guangdong was significant,with notable differences across various regions,and the vegetation growth improved significantly under relatively stable meteorological fields.