Latest publications
Results 1801 to 1825 of 8726
The 15-year set of radar observations of Mesosphere and Lower Thermosphere (MLT) winds obtained from Davis station in Antarctica (69S, 78E) provide an opportunity for studies of interhemispheric coupling. Observations and modelling described by Becker and Fritts [2006]…
After an unusually (for recent solar cycles) long absence, sunspots of solar cycle 24 started to appear late in 2009. Cosmic ray activity monitored at Earth has an inverse … relationship with the sunspot cycle, being maximum at solar … minimum.
Cosmic rays generally come from beyond the solar system but rarely they can come from the Sun. This review discusses the solar source, propagation to Earth and impact of highly relativistic solar protons.
Ice within marine basins of East Antarctica, and their outlets, represent the ultimate limit on sea level change. The region of East Antarctica between the Ross Sea and Wilkes Land hosts a number of major basin, but has been poorly understood. Long range aerogeophysics from US…
Knowledge of environmental variability and change during the … Medieval Climate Anomaly (MCA ; ~800 to 1300 - 1400 AD) in the Southern Hemisphere has been characterized by a La Nina-like mean climate state in the Pacific Basin…
Black carbon (BC), the primary light-absorbing aerosol in the atmosphere, is emitted by the incomplete combustion of biomass and fossil fuels affecting the radiative balance of the atmosphere. As a contributor to climate change, BC may rival greenhouse gases such as methane.
Ice core records from Antarctic and Greenland have revealed that the last deglaciation (ca. 19,000 to 11,000 years before present) was accompanied by a ca. 80 ppmv increase in atmospheric CO2 and a sequence of large, hemispheric climate variations.
Changes in solar activity modulate the galactic cosmic ray flux, and in turn, the production rate of cosmogenic 10Be in the Earth’s atmosphere. The best archives of past changes in 10Be production rate are polar ice cores.
The Dome Summit South ice core from Law Dome, East Antarctica is 1200 m long and reveals an unusually high accumulation rate for Late Holocene precipitation (640 kg m2/a), dating to 90,000 years before present (BP) at its base.
Ice core records from Antarctic and Greenland have revealed that the last deglaciation (ca. 19, 000 to 11, 000 years before present) was accompanied by an 80 ppmv increase in atmospheric CO2 and a sequence of large, hemispheric climate variations.
Geisz et al. report an unexpected consequence of climate … change, implicating glacier meltwater as a source for DDT … in coastal Antarctic seas (1). Hypothetically, glaciers may … act as secondary sources for DDT and there may be a link … to climate change. However, their data are sparse, variable…