@data{928f96b4-09cd-4d97-a641-eb0fb4bb034b, author = {Xiyan Xu}, cstr = {}, doi = {}, journal = {A Big Earth Data Platform for Three Poles}, month = {06}, publisher = {}, title = {The global AVHRR remote sensing vegetation phenology at peturning green stage in spring (1981-2003)}, url = {http://dx.doi.org}, year = {2019} }