Table 1 Desertification land area of Mu Us sandy land and its changes in different periods.
Year | Mild desertification | Moderate desertification | Severe desertification | Extreme desertification | Total area (km2)/annual change rate (%) | |
|---|---|---|---|---|---|---|
1990 | Area/km2 | 4910 | 15,430 | 12,810 | 3040 | 36,190 |
1995 | Area/km2 | 3400 | 13,410 | 15,000 | 4460 | 36,270 |
2000 | Area/km2 | 2710 | 11,980 | 17,410 | 4860 | 36,960 |
2007 | Area/km2 | 6300 | 19,000 | 8000 | 2750 | 36,050 |
2010 | Area/km2 | 9500 | 16,410 | 7270 | 2020 | 35,200 |
2017 | Area/km2 | 11,090 | 15,510 | 6010 | 1890 | 34,500 |
1990–1995 | Area change/km2 | − 1510 | − 2020 | 2190 | 1420 | + 80 |
Annual change rate/% | − 7.1 | − 2.8 | 3.2 | 8.0 | 0.1 | |
1995–2000 | Area change/km2 | − 690 | − 1430 | 2410 | 400 | + 690 |
Annual change rate/% | − 4.4 | − 2.2 | 3.0 | 1.7 | 0.4 | |
2000–2007 | Area change/km2 | 3590 | 7019 | − 9410 | − 2110 | − 911 |
Annual change rate/% | 12.8 | 6.8 | − 10.5 | − 7.8 | − 0.4 | |
2007–2010 | Area change/km2 | 3200 | − 2589 | − 730 | − 730 | − 849 |
Annual change rate/% | 14.7 | − 4.8 | − 3.1 | − 9.7 | − 0.8 | |
2010–2017 | Area change/km2 | 1590 | − 900 | − 1260 | − 130 | − 700 |
Annual change rate/% | 2.2 | − 0.8 | − 2.7 | − 1.0 | − 0.3 | |
1990–2017 | Area change/km2 | 6180 | 80 | − 6800 | − 1150 | − 1690 |
Annual change rate/% | 3.0 | 0.0 | − 2.7 | − 1.7 | − 0.2 |
