Carbon Dioxide Transport by Ocean Currents at 25 ° N Latitude in the Atlantic Ocean

Three ice cores to bedrock from the Dunde ice cap on the north-central QinghaiTibetan Plateau ofChina provide a detailed record of Holocene and Wisconsin-Wurm late glacial stage (LGS) climate changes in the subtropics. The records reveal that LGS conditions were apparently colder, wetter, and dustier than Holocene conditions. The LGS part of the cores is characterized by more negative 8180 ratios, increased dust content, decreased soluble aerosol concentrations, and reduced ice crystal sizes than the Holocene part. These changes occurred rapidly -10,000 years ago. In addition, the last 60 years were apparently one ofthe warmest periods in the entire record, equalling levels of the Holocene maximum between 6000 and 8000 years ago.