数据分享|GIMMS NDVI数据下载

该数据集是NOAA的Advanced Very High Resolution Radiometer (AVHRR)传感器获取的长时间序列的NDVI数据。GIMMS NDVI3g 有两个版本，GIMMS NDVI3g.V0和GIMMS NDVI3g.V1。GIMMS NDVI3g.V1覆盖全球范围，时间范围1981-2015年，空间分辨率1/12°,时间分辨率为15天。是目前时间范围最长的NDVI数据产品。与前几代AVHRR产品相比，GIMMS NDVI3g精度更高，受大气水汽、火山爆发等的影响较小。

Temporalrange: 1981-07-01 -> 2015-12-31

RangeSemester: Jul 1 - Dec 31 (7:0.5:12.5)

SpatialResolution: 1/12 x 1/12 degrees

TemporalResolution: 1/24 a year

_fill_val: -32768

NorthernmostLatitude: 90

SouthernmostLatitude: -90

WesternmostLongitude: -180

EasternmostLongitude: 180

Flag values are embeded on the percentile variable:       2000*flag + percentile. Thus, the actual percentile three ranges[0 1000],[2000 3000]and [4000 5000] could provide direct information of how interpolation is affecting the time series. 

Flag values are (simpler): 

flag0: ndvi without apparent issues (good value)             

flag1: ndvi retrieved from spline interpolation                 

flag2: ndvi retrieved from seasonal profile (possible snow/cloud)     

percentile：to represent the distribution of ndvi values in the time series. Range 10*[0, 100] 

storage：Arranged data in ncd format, compiled it in two nc4 files a year.  Each nc4 file includes 6 months of ndvi data (jan-jun and jul-dec), with a total of 12 (15-day) composites each semester.

数据获取打开下面