Share This Author
Insolation-driven changes in atmospheric circulation over the past 116,000 years in subtropical Brazil
A high-resolution oxygen isotope record of a U/Th-dated stalagmite from subtropical southern Brazil, covering the past 116,200 years, finds that variations in rainfall source and amount are primarily driven by summer solar radiation, which is controlled by the Earth's precessional cycle.
Climate change patterns in Amazonia and biodiversity.
These absolute-dated speleothem oxygen isotope records that characterize hydroclimate variation in western and eastern Amazonia over the past 250 and 20 ka are presented, suggesting that higher biodiversity in western Amazonia, contrary to 'Refugia Hypothesis', is maintained under relatively stable climatic conditions.
Orbitally driven east–west antiphasing of South American precipitation
The variations of tropical precipitation are antiphased between the hemispheres on orbital timescales. A comparison between a speleothem record of precipitation in northeast Brazil and rainfall…
Timing and structure of the 8.2 kyr B.P. event inferred from δ18O records of stalagmites from China, Oman, and Brazil
Oxygen isotope records of stalagmites from China and Oman reveal a weak summer monsoon event, with a double-plunging structure, that started 8.21 ± 0.02 kyr B.P. An identical but antiphased pattern…
A review of the South American monsoon history as recorded in stable isotopic proxies over the past two millennia
We review the history of the South American sum- mer monsoon (SASM) over the past 2000 yr based on high-resolution stable isotope proxies from speleothems, ice cores and lake sediments. Our review is…
The Global Paleomonsoon as seen through speleothem records from Asia and the Americas
- H. Cheng, A. Sinha, Xianfeng Wang, F. Cruz, R. Edwards
- Environmental Science, GeographyClimate Dynamics
- 5 May 2012
The regional monsoons of the world have long been viewed as seasonal atmospheric circulation reversal—analogous to a thermally-driven land-sea breeze on a continental scale. This conventional view of…
Reconstruction of regional atmospheric circulation features during the late Pleistocene in subtropical Brazil from oxygen isotope composition of speleothems
Evidence of rainfall variations in Southern Brazil from trace element ratios (Mg/Ca and Sr/Ca) in a Late Pleistocene stalagmite
A stalagmite record of changes in atmospheric circulation and soil processes in the Brazilian subtropics during the Late Pleistocene
Hydroclimate changes across the Amazon lowlands over the past 45,000 years
The Amazon was widely drier during the last glacial period, with much less recycling of water and probably reduced plant transpiration, although the rainforest persisted throughout this time.