Fig. 2: NDVImax and GPPmax trend during 1998–2009 in different IPCC climate regions.
From: Decadal trends in global grassland growth peaks and their drivers since the 1980s
Global maps depict the spatial consistency between NDVImax and GPPmax trends. Colors indicate trend direction: purple (both decreasing), green (both increasing), and brown (divergent trends). Histograms show mean NDVImax and GPPmax trends with error bars representing standard errors across IPCC climate regions during 1998–2009. ***, **, * and ns denote trends significantly different from zero (two-sided Wilcoxon signed-rank tests) at P < 0.001, P < 0.01, P < 0.05, and P > 0.1, respectively. Abbreviations: ALA: Alaska/N.W. Canada (10025), AMZ: Amazon (3134), ARC: Arctic (29873), CAM: Central America/Mexico (1650), CAR: Small islands regions: Caribbean (17), CAS: Central Asia (14327), CEU: Central Europe (513), CGI: Canada/Greenland/Iceland (21665), CNA: Central North America (12151), EAF: East Africa (7125), EAS: East Asia (22011), ENA: East North America (29), MED: South Europe/Mediterranean (3316), NAS: North Asia (17503), NAU: North Australia (2988), NEB: North-East Brazil (110), NEU: North Europe (4729), SAF: Southern Africa (3752), SAH: Sahara (2672), SAS: South Asia (2697), SAU: South Australia/New Zealand (1737), SEA: Southeast Asia (59), SSA: Southeastern South America (8099), TIB: Tibetan Plateau (23050), WAF: West Africa (6265), WAS: West Asia (13334), WNA: West North America (17379), WSA: West Coast South America (3954). The numbers in parentheses indicate the sample size (number of valid and independent pixels) for each region. Source data are provided as a Source Data file.
