The karst process acts as carbon sequestration for atmospheric CO_2.The amount of karst carbon sequestration (KCS) depends on the discharge of karst catchment and inorganic carbon concentration of the water body.Based...The karst process acts as carbon sequestration for atmospheric CO_2.The amount of karst carbon sequestration (KCS) depends on the discharge of karst catchment and inorganic carbon concentration of the water body.Based on the data from the monitoring station on Banzhai subterranean stream located in Maolan National Nature Reserve of Guizhou province,the process and influence factors of KCS have been analyzed.It shows that the amount of KCS is about 353 t C per year in the catchment of Banzhai subterranean stream,and there is good linear relationship between the strength of KCS and discharge of the stream at various time scales.Therefore,how to monitor the discharge accurately is the key to the estimation of KCS.And stations with real-time monitoring function are very important for KCS calculation because of strong seasonal variability of the karst water cycle.展开更多
The existence of the Paleo-Tethys in western Yunnan has generally beenrecognized as the progress in geological studies there during the last decade.Recently, Japanese geologists proposed that the Carboniferous-Permian...The existence of the Paleo-Tethys in western Yunnan has generally beenrecognized as the progress in geological studies there during the last decade.Recently, Japanese geologists proposed that the Carboniferous-Permian volcanic arcand seamount rock associations in Japan originated from the low-latitudeProto-Pacific realm, and their northward migration seems to have started in or afterthe Triassic times. Then the very interesting problems are facing us: how does展开更多
Molecular stratigraphical, carbonate carbon isotopic, stratigraphical and paleontological data show that algal booming, eutrophication, anoxia, hypersalinity, positive δ13C excursion and biomass decreasing occurred i...Molecular stratigraphical, carbonate carbon isotopic, stratigraphical and paleontological data show that algal booming, eutrophication, anoxia, hypersalinity, positive δ13C excursion and biomass decreasing occurred in the offshore carbonate environments of the Frasnian-Famennian (F-F) transition, which hints that red tide might frequently take place in the F-F transition of Guangxi, South China. We suggest that the mass extinction of the reef ecosystems and the shallow-water marine organisms in the F-F transition of the lower-middle latitudes may be related to the frequent occurrence of red tide in that time.展开更多
基金funded by the project (No.41072192)from National Natural Science Foundation of Chinathe project(No.1212011087122)from China Geological Survey
文摘The karst process acts as carbon sequestration for atmospheric CO_2.The amount of karst carbon sequestration (KCS) depends on the discharge of karst catchment and inorganic carbon concentration of the water body.Based on the data from the monitoring station on Banzhai subterranean stream located in Maolan National Nature Reserve of Guizhou province,the process and influence factors of KCS have been analyzed.It shows that the amount of KCS is about 353 t C per year in the catchment of Banzhai subterranean stream,and there is good linear relationship between the strength of KCS and discharge of the stream at various time scales.Therefore,how to monitor the discharge accurately is the key to the estimation of KCS.And stations with real-time monitoring function are very important for KCS calculation because of strong seasonal variability of the karst water cycle.
基金Project supported by the National Natural Science Foundation of China the Laboratory of Lithosphere Tectonic Evolution, Institute of Geology, Academia Sinica.
文摘The existence of the Paleo-Tethys in western Yunnan has generally beenrecognized as the progress in geological studies there during the last decade.Recently, Japanese geologists proposed that the Carboniferous-Permian volcanic arcand seamount rock associations in Japan originated from the low-latitudeProto-Pacific realm, and their northward migration seems to have started in or afterthe Triassic times. Then the very interesting problems are facing us: how does
基金This work was jointly supported by the National Natural Science Foundation of China (Grant No. 40072041)the Chinese Commission on Stratigraphy and the Climbing Project of Ministry of Science Technology of China (SSER).
文摘Molecular stratigraphical, carbonate carbon isotopic, stratigraphical and paleontological data show that algal booming, eutrophication, anoxia, hypersalinity, positive δ13C excursion and biomass decreasing occurred in the offshore carbonate environments of the Frasnian-Famennian (F-F) transition, which hints that red tide might frequently take place in the F-F transition of Guangxi, South China. We suggest that the mass extinction of the reef ecosystems and the shallow-water marine organisms in the F-F transition of the lower-middle latitudes may be related to the frequent occurrence of red tide in that time.
