一、日本IGBP国家委员会的建立 在国际科联理事会(1CSU)的组织下,日本于1984年开始IGBP研究的准备,于1987年作为日本学术会议(Science Council of Japan)议长的个人顾问团体,成立了IGBP特别委员会(ad hoc Comittee of IGBP),主席为大岛...一、日本IGBP国家委员会的建立 在国际科联理事会(1CSU)的组织下,日本于1984年开始IGBP研究的准备,于1987年作为日本学术会议(Science Council of Japan)议长的个人顾问团体,成立了IGBP特别委员会(ad hoc Comittee of IGBP),主席为大岛康行教授。1987年7月成立“人类活动与地球环境”专门委员会(Special comittee on“Human Activity and Global Environment”),主席为吉野正敏教授。展开更多
Land cover products provide critical information for monitoring and analyzing land surface changes.However,notable disagreement and incompatible classification systems among existing land cover products bring challeng...Land cover products provide critical information for monitoring and analyzing land surface changes.However,notable disagreement and incompatible classification systems among existing land cover products bring challenges in using them.Here,we developed a hierarchical International Geosphere-Biosphere Programme(IGBP)classification system and integrated four widely used land cover products(i.e.,MODIS-IGBP,ESA-CCI,GlobeLand30,and GLC_FCS30)based on their accuracy against a collection of global reference samples.We generated a hybrid global annual land cover product(HYBMAP)with~1 km(1/120°,30″)spatial resolution from 2000 to 2020.The HYBMAP integrates information from the four products of high-and medium-resolution and reduces the disagreement between them by up to 20.1%.The overall accuracy of the HYBMAP is 75.5%,which is higher than the best of the four products(MODIS-IGBP,70.9%).HYBMAP also integrates the temporal change information from the four products and identifies a faster growth of built-up lands.The HYBMAP provides more consistent and reliable global land cover time series data for global change research.It is free to access at https://doi.org/10.5281/zenodo.10488191.展开更多
文摘一、日本IGBP国家委员会的建立 在国际科联理事会(1CSU)的组织下,日本于1984年开始IGBP研究的准备,于1987年作为日本学术会议(Science Council of Japan)议长的个人顾问团体,成立了IGBP特别委员会(ad hoc Comittee of IGBP),主席为大岛康行教授。1987年7月成立“人类活动与地球环境”专门委员会(Special comittee on“Human Activity and Global Environment”),主席为吉野正敏教授。
基金supported by the National Natural Science Foundation of China(42271104)the Shenzhen Funda-mental Research Program(GXWD20201231165807007-20200814213435001)+1 种基金the Shenzhen Science and Tech nology Program(JCYJ20220531093201004)Shenzhen Science and Technology Program(KQTD20221101093604016).
文摘Land cover products provide critical information for monitoring and analyzing land surface changes.However,notable disagreement and incompatible classification systems among existing land cover products bring challenges in using them.Here,we developed a hierarchical International Geosphere-Biosphere Programme(IGBP)classification system and integrated four widely used land cover products(i.e.,MODIS-IGBP,ESA-CCI,GlobeLand30,and GLC_FCS30)based on their accuracy against a collection of global reference samples.We generated a hybrid global annual land cover product(HYBMAP)with~1 km(1/120°,30″)spatial resolution from 2000 to 2020.The HYBMAP integrates information from the four products of high-and medium-resolution and reduces the disagreement between them by up to 20.1%.The overall accuracy of the HYBMAP is 75.5%,which is higher than the best of the four products(MODIS-IGBP,70.9%).HYBMAP also integrates the temporal change information from the four products and identifies a faster growth of built-up lands.The HYBMAP provides more consistent and reliable global land cover time series data for global change research.It is free to access at https://doi.org/10.5281/zenodo.10488191.
