3 Ryskov Ya G, Demkin V A, Oleynik S A, et al. Dynamics of pedogenic carbonate for the last 5000 years and its role as a buffer reservoir foratmospheric carbon dioxide in soils of Russia. Global Planet Change, 2008, 61: 63-69？？
[2]
4 Dart R C, Barovich K M, Chittleborough D J, et al. Calcium in regolith carbonates of central and southern Australia: Its source and implicationsfor the global carbon cycle. Palaeogeogr Palaeoclimatol Palaeoecol, 2007, 249: 322-334？？
[3]
5 Capo R C, Chadwick O A. Sources of strontium and calcium in desert soil and calcrete. Earth Planet Sci Lett, 1999, 170: 61-72？？
[4]
6 Berner R A. Weathering, plants and the long-term carbon cycle. Geochim Cosmochim Acta, 1992, 56: 3225-3231？？
[5]
8 Salomons W, Mook W G. Isotope geochemistry of carbonate dissolution and re-precipitation in soils. Soil Sci, 1976, 122: 15-24？？
[6]
10 Hamidi E M, Colin F, Michard A, et al. Isotopic tracers of the origin of Ca in a carbonate crust from the Middle Atlas, Morocco. Chem Geol,2001, 176: 93-104？？
[7]
12 Dreybrodt W. Processes in Karst Systems-Physics, Chemistry, and Geology. Heidelberg: Springer, 1988
[8]
13 Liu Z, Svensson U, Dreybrodt W, et al. Hydrodynamic control of inorganic calcite precipitation in Huanglong Ravine, China: Field measurementsand theoretical prediction of deposition rates. Geochim Cosmochim Acta, 1995, 59: 3087-3097？？
21 Hilley G E, Chamberlain C P, Moon S, et al. Competition between erosion and reaction kinetics in controlling silicate-weathering rates. EarthPlanet Sci Lett, 2010, 293: 191-199？？
[11]
1 Eswaran H, Reich P F, Kimble J M, et al. Global carbon stocks. In: Lal R, Kimble J M, Eswaran H, et al, eds. Global Climate Change andPedogenic Carbonates. Boca Raton: Lewis Publishers, 1999. 15-25
[12]
2 Schlesinger W H. Biochemistry: An Analysis of Global Change. 2nd ed. New York: Academic Press, 1997
[13]
7 Salomons W, Goudie A, Mook W G. Isotopic composition of calcrete deposits from Europe, Africa and India. Earth Surface Proc Landforms,1978, 3: 43-57
[14]
9 Chiquet A, Michard A, Nahon D, et al. Atmospheric input vs. in situ weathering in the genesis of calcretes: An Sr isotope study at Galvez(Central Spain). Geochim Cosmochim Acta, 1999, 63: 311-323？？
[15]
11 Van der Hoven S J, Quade J. Tracing spatial and temporal variations in the sources of calcium in pedogenic carbonates in a semiarid environment.Geoderma, 2002, 108: 259-276？？
[16]
14 Liu Z, Dreybrodt W. Dissolution kinetics of calcium carbonate minerals in H2O-CO2 solutions in turbulent flow: The role of the diffusionboundary layer and the slow reaction H2O+CO2？H++HCO3-. Geochim Cosmochim Acta, 1997, 61: 2879-2889？？
[17]
16 Liu Z, Sun H, Lu B, et al. Wet-dry seasonal variations of hydrochemistry and carbonate precipitation rates in a travertine-depositing canal atBaishuitai, Yunnan, SW China: Implications for the formation of biannual laminae in travertine and for climatic reconstruction. Chem Geol,2010, 273: 258-266？？
[18]
17 White A F, Brantley S L. Chemical Weathering Rates of Silicate Minerals: Reviews in Mineralogy. Washington D C: Mineralogical Societyof America, 1995
[19]
18 White A F, Blum A E, Schulz M S, et al. Chemical weathering rates of a soil chronosequence on granitic alluvium: I. Quantification of mineralogicaland surface area changes and calculation of primary silicate reaction rates. Geochim Cosmochim Acta, 1996, 60: 2533-2550？？
[20]
19 White A F, Bullen T D, Schulz M S, et al. Differential rates of feldspar weathering in granitic regoliths. Geochim Cosmochim Acta, 2001, 65:847-869？？
[21]
20 Berg A, Banwart S A. Carbon dioxide mediated dissolution of Ca-feldspar: Implications for silicate weathering. Chem Geol, 2000, 163:25-42？？
[22]
22 Deines P, Langmuir D, Harmon R S. Stable carbon isotope ratios and the existence of a gas phase in the evolution of carbonate waters. GeochimCosmochim Acta, 1974, 38: 1147-1164？？
[23]
23 Cerling T E. The stable isotopic composition of modern soil carbonate and its relation to climate. Earth Planet Sci Lett, 1984, 71: 229-240？？
[24]
24 Quade J, Chivas A R, McCulloch M T. Strontium and carbon isotope tracers and the origins of soil carbonate in South Australia and Victoria.Palaeogeogr Palaeoclimatol Palaeoecol, 1995, 113: 103-117？？
