The Fraction of Absorbed Photosynthetically Active Radiation(FPAR) is an important indicator of the primary productivity of vegetation. FPAR is often used to estimate the assimilation of carbon dioxide in vegetation. ...The Fraction of Absorbed Photosynthetically Active Radiation(FPAR) is an important indicator of the primary productivity of vegetation. FPAR is often used to estimate the assimilation of carbon dioxide in vegetation. Based on MOD15 A2 H/FPAR data product, the temporal and spatial variation characteristics and variation trend of FPAR in different vegetation types in 2001 to 2018 were analyzed in the Hengduan Mountains. The response of FPAR to climate change was investigated by using Pearson correlation analytical method and partial least squares regression analysis. Results showed that the FPAR in Hengduan Mountains presented an increasing trend with time. Spatially, it was high in the south and low in the north, and it also showed obvious vertical zonality by elevation gradient.The vegetation FPAR was found to be positively correlated with air temperature and sunshine duration but negatively correlated with precipitation. Partial least squares regression analysis showed that the influence of sunshine duration on vegetation FPAR in Hengduan Mountains was stronger than that of air temperature and precipitation.展开更多
Erratum to:J.Mt.Sci.(2021)18(4):891-906 https://doi.org/10.1007/s11629-020-6465-9 On Page 894,Fig.1d is redundant in the original article and should be removed.On Page 895,in Section 2.2,the 4th paragraph,the figure n...Erratum to:J.Mt.Sci.(2021)18(4):891-906 https://doi.org/10.1007/s11629-020-6465-9 On Page 894,Fig.1d is redundant in the original article and should be removed.On Page 895,in Section 2.2,the 4th paragraph,the figure number"Fig.1d"in the last sentence is incorrect.It should be corrected into"Fig.1c".On Page 896,in Section 3.2,the 1st paragraph,the figure number"Fig.1d"in the 2nd sentence is incorrect.It should be corrected into"Fig.1c".展开更多
草地碳汇/源是植被生态系统中碳收支和碳平衡的一个重要内容,区分碳汇和碳源对气候变化的响应可为减源增汇提供科学依据。基于MODIS NPP数据和土壤呼吸模型量化了2001—2019年青藏高原草地净生态系统生产力(NEP)的时空变化和碳汇/源格局...草地碳汇/源是植被生态系统中碳收支和碳平衡的一个重要内容,区分碳汇和碳源对气候变化的响应可为减源增汇提供科学依据。基于MODIS NPP数据和土壤呼吸模型量化了2001—2019年青藏高原草地净生态系统生产力(NEP)的时空变化和碳汇/源格局,利用通径分析方法分析了青藏高原气候变化对草地碳汇/源的影响。结果表明:青藏高原草地NEP呈现东高西低的分布格局,年平均值为54.41 g C m^(-2)。草地整体上以碳汇功能为主。碳汇区面积约为72.26万km^(2),碳源区面积约为47.82万km^(2),净碳汇总量65.35 Tg C a^(-1)。近19年青藏高原草地NEP以增加趋势为主,青藏高原气候暖湿化趋势有利于草地NEP的增加,增强碳汇;而暖干化趋势对NEP的影响在不同生态地理区差异较大。展开更多
基金supported by the National Natural Science Foundation of China (41801099)the Second Tibetan Plateau Scientific Expedition and Research Program (2019QZKK0307, 2019QZKK0301)。
文摘The Fraction of Absorbed Photosynthetically Active Radiation(FPAR) is an important indicator of the primary productivity of vegetation. FPAR is often used to estimate the assimilation of carbon dioxide in vegetation. Based on MOD15 A2 H/FPAR data product, the temporal and spatial variation characteristics and variation trend of FPAR in different vegetation types in 2001 to 2018 were analyzed in the Hengduan Mountains. The response of FPAR to climate change was investigated by using Pearson correlation analytical method and partial least squares regression analysis. Results showed that the FPAR in Hengduan Mountains presented an increasing trend with time. Spatially, it was high in the south and low in the north, and it also showed obvious vertical zonality by elevation gradient.The vegetation FPAR was found to be positively correlated with air temperature and sunshine duration but negatively correlated with precipitation. Partial least squares regression analysis showed that the influence of sunshine duration on vegetation FPAR in Hengduan Mountains was stronger than that of air temperature and precipitation.
文摘Erratum to:J.Mt.Sci.(2021)18(4):891-906 https://doi.org/10.1007/s11629-020-6465-9 On Page 894,Fig.1d is redundant in the original article and should be removed.On Page 895,in Section 2.2,the 4th paragraph,the figure number"Fig.1d"in the last sentence is incorrect.It should be corrected into"Fig.1c".On Page 896,in Section 3.2,the 1st paragraph,the figure number"Fig.1d"in the 2nd sentence is incorrect.It should be corrected into"Fig.1c".
文摘草地碳汇/源是植被生态系统中碳收支和碳平衡的一个重要内容,区分碳汇和碳源对气候变化的响应可为减源增汇提供科学依据。基于MODIS NPP数据和土壤呼吸模型量化了2001—2019年青藏高原草地净生态系统生产力(NEP)的时空变化和碳汇/源格局,利用通径分析方法分析了青藏高原气候变化对草地碳汇/源的影响。结果表明:青藏高原草地NEP呈现东高西低的分布格局,年平均值为54.41 g C m^(-2)。草地整体上以碳汇功能为主。碳汇区面积约为72.26万km^(2),碳源区面积约为47.82万km^(2),净碳汇总量65.35 Tg C a^(-1)。近19年青藏高原草地NEP以增加趋势为主,青藏高原气候暖湿化趋势有利于草地NEP的增加,增强碳汇;而暖干化趋势对NEP的影响在不同生态地理区差异较大。
