Table 2: Annually mean precipitation and variations of atmospheric CO2 concentrations over Tibetan plateau.
Year |
Annual growth rate |
Bimonthly growth rate |
Annual C uptake rate |
Lhasa |
Shiquanhe |
Xining |
Qabqa |
Hotan |
1991 |
-1.48 |
2.64 |
5.12 |
476.3 |
33.6 |
243.2 |
278 |
39.3 |
1992 |
4.90 |
3.07 |
5.07 |
291.7 |
47.7 |
425.2 |
350.3 |
61.7 |
1993 |
-0.29 |
1.84 |
3.77 |
537.2 |
56.1 |
420.9 |
397.5 |
69 |
1994 |
2.95 |
2.45 |
5.65 |
371.8 |
73.3 |
418.1 |
290 |
62.9 |
1997 |
No data |
2.22 |
3.87 |
321.5 |
53 |
409.9 |
312.9 |
10.6 |
1998 |
1.19 |
2.46 |
1.53 |
580.9 |
55.4 |
460.3 |
299.7 |
32.6 |
1999 |
2.60 |
1.98 |
3.69 |
538.1 |
116.4 |
411.9 |
308.6 |
32.3 |
2000 |
3.04 |
2.33 |
3.14 |
529.7 |
120.8 |
343 |
244 |
19.2 |
2001 |
-2.16 |
3.09 |
4.01 |
492.3 |
52.9 |
397.8 |
336.2 |
26 |
2002 |
2.84 |
2.18 |
2.36 |
539.3 |
104.8 |
387.7 |
316.8 |
63.8 |
2003 |
6.09 |
2.11 |
1.23 |
549.7 |
40.6 |
537.9 |
266.7 |
86.1 |
2004 |
2.23 |
3.69 |
3.37 |
555.2 |
35.6 |
429.5 |
359.3 |
40.3 |
2005 |
-0.79 |
0.46 |
3.81 |
490.3 |
42.7 |
484.1 |
377 |
88.4 |
2006 |
4.24 |
3.62 |
3.49 |
339.3 |
101.3 |
352.3 |
332.1 |
41.7 |
2007 |
-0.05 |
3.37 |
3.32 |
477.3 |
33.4 |
523.1 |
332.9 |
23.8 |
2008 |
3.58 |
2.82 |
4.29 |
533.8 |
80 |
378.6 |
353.6 |
34.3 |
2009 |
0.61 |
4.41 |
4.51 |
344 |
25.3 |
459.1 |
340.1 |
19.2 |
2010 |
3.95 |
2.32 |
3.29 |
359.8 |
91.1 |
405 |
328.8 |
111.9 |
2011 |
0.02 |
3.27 |
2.5 |
425.4 |
58 |
390.4 |
314.5 |
11.4 |
2012 |
1.72 |
-0.39 |
0.72 |
365.2 |
47.9 |
446.1 |
332.4 |
77.8 |
2013 |
4.62 |
5.66 |
4.27 |
565.2 |
111 |
413.6 |
275.7 |
44.5 |
2014 |
-0.45 |
3.59 |
4.93 |
637.8 |
48.2 |
446.5 |
351.6 |
34.7 |
2015 |
3.00 |
1.71 |
1.22 |
340 |
138.2 |
306.2 |
308.9 |
36.5 |
2016 |
3.86 |
4.05 |
2.45 |
551.6 |
59.3 |
446.5 |
464.2 |
49.6 |
2017 |
2.88 |
2.17 |
2.14 |
552.2 |
132.1 |
453.1 |
353.5 |
83.7 |
2018 |
3.24 |
3.41 |
3.89 |
535.2 |
93.3 |
518.9 |
523.7 |
66.7 |
2019 |
-0.77 |
2.73 |
0.94 |
491 |
119.9 |
536.5 |
418.5 |
62.9 |
2020 |
2.67 |
3.09 |
2.73 |
428.1 |
23 |
432.8 |
369.6 |
49.2 |
Annually mean precipitation data are recorded by the Tibetan meteorological stations labelled in Figure 1.