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Dynamic variations at the base of the solar convection zone
Changes in the rotation of the sun near the base of its convective envelope are detected, including a prominent variation with a period of 1.3 years at low latitudes, which may generate the 22-year cycles of magnetic activity.
A 25,000-year tropical climate history from bolivian ice cores
The abrupt onset and termination of a Younger Dryas-type event suggest atmospheric processes as the probable drivers of regional accumulation during the LGS, during deglaciation, and over the past 3000 years, which is concurrent with higher water levels in regional paleolakes.
A high-resolution millennial record of the south asian monsoon from himalayan ice cores
A high-resolution ice core record from Dasuopu, Tibet, reveals that this site is sensitive to fluctuations in the intensity of the South Asian Monsoon, and suggests a large-scale, plateau-wide 20th-century warming trend that appears to be amplified at higher elevations.
Deeply Penetrating Banded Zonal Flows in the Solar Convection Zone.
It is established, using complementary helioseismic observations over 4 yr from the GONG network and from the MDI instrument on board SOHO, that the banded flows are not merely a near-surface phenomenon: rather, they extend downward at least 60 Mm and thus are evident over a significant fraction of the nearly 200 Mm depth of the solar convection zone.
Structural complexity and land-surface energy exchange along a gradient from arctic tundra to boreal forest
Question: Current climate changes in the Alaskan Arctic, which are characterized by increases in temperature and length of growing season, could alter vegetation structure, especially through
Seasonal variation of heavy metals (Cd, Pb and Hg) in sediments and in mullet, Mugil cephalus (Mugilidae), from the Ghar El Melh Lagoon (Tunisia)
1 - This study investigates the toxic contaminants cadmium (Cd), lead (Pb) and mercury (Hg) in surface sediments and in the fish species Mugil cephalus of the lagoon of Ghar El Melh (GEM), Tunisia.
Toxicity Identification Evaluation : Characterization of Chronically Toxic Effluents , Phase I
This manual is intended to provide guidance to aid dischargers in characterizing the type of toxicants that are causing chronic toxicity in industrial and municipal effluents. In a regulatory
Assessment of heavy metal contamination of sediments along the cross river channel in Cross River state , Nigeria
Sixteen sediments samples were obtained from eleven beaches along the Cross River channel in Nigeria. The sediments were analysis for heavy metal contaminants such as Fe, Cu, Mn, Cr, Zn, Hg, Pd, Cd,