scholarly journals Seawater isotope constraints on tropical hydrology during the Holocene

2007 ◽  
Vol 34 (13) ◽  
pp. n/a-n/a ◽  
Author(s):  
Delia W. Oppo ◽  
Gavin A. Schmidt ◽  
Allegra N. LeGrande
Keyword(s):  
The Holocene ◽  
Tropical Hydrology

Speleothem records of changes in tropical hydrology over the Holocene and possible implications for atmospheric methane

The Holocene ◽  
2011 ◽  
Vol 21 (5) ◽  
pp. 735-741 ◽  
Author(s):  
Stephen J. Burns
Keyword(s):  
Southern Hemisphere ◽  
Northern Hemisphere ◽  
Methane Production ◽  
Methane Emissions ◽  
Atmospheric Methane ◽  
Direct Response ◽  
The Holocene ◽  
Tropical Hydrology ◽  
The Tropics ◽  
Methane Concentrations

Recent speleothem records from the tropics of both hemispheres document a gradual decrease in the intensity of the monsoons in the Northern Hemisphere and increase in the Southern Hemisphere monsoons over the Holocene. These changes are a direct response of the monsoons to precession-driven insolation variability. With regard to atmospheric methane, this shift should result in a decrease in Northern Hemisphere tropical methane emissions and increase in Southern Hemisphere emissions. It is plausible that that overall tropical methane production experienced a minimum in the mid-Holocene because of decreased seasonality in rainfall at the margins of the tropics. Changes in tropical methane production alone might, therefore, explain many of the characteristics of Holocene methane concentrations and isotopic chemistry.

L'activité du volcan Nevado Sabancaya (Pérou) au cours de l'Holocène [Activity of Nevado Sabancaya volcano (Peru) throughout the Holocene]

Quaternaire ◽  
1998 ◽  
Vol 9 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Etienne Juvigné ◽  
Jean CLaude Thouret ◽  
Etienne Gilot ◽  
Louis Leclercq ◽  
Alain Gourgaud
Keyword(s):  
The Holocene
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