|
|
|
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
Illinois State Geological Survey, Champaign, IL, United States
Soil organic matter (SOM) and soil carbonate (SC) are common constituents in soils and are directly related to plant growth. SOM accumulates gradually from the decomposition of plant material over time, whereas SC formation is biased to dry-season soil-dissolved CO 2 that derives from plant respiration during a drying phase of the growing season. In some mixed C 3 -C 4 environments, the peak of C 3 and C 4 plant metabolism differs seasonally, and the carbon source that contributes to the SOM and SC can be different. Consequently, delta 13 C SOM values reflect an annual average of the floral biomass, but delta 13 C SC values reflect a seasonal aspect of the plant community. The relationship between delta 13 C SC and delta 13 C SOM is mainly controlled by how different the seasonal conditions are. Our results suggest that the relationship is a seasonal proxy that can be used to differentiate the seasonality effects of Indian, East Asian, and Siberian monsoons on the Chinese Loess Plateau during the last interglacial-glacial cycle.
This record provided courtesy of AGI/GeoRef.
This article has been cited by other articles:
![]() |
Isotope evidence of paleo-El Nino-Southern Oscillation cycles in loess-paleosol record in the central United States Geology, September 1, 2000; 28(9): 771 - 774. |
||||
![]() |
E. A. BESTLAND and E. S. KRULL Palaeoenvironments of Early Miocene Kisingiri volcano Proconsul sites: evidence from carbon isotopes, palaeosols and hydromagmatic deposits Journal of the Geological Society, October 1, 1999; 156(5): 965 - 976. [Abstract] [PDF] |
||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |