The influence of the tropical and subtropical Atlantic and Pacific Oceans on precipitation variability over Southern Central South America on seasonal time scales

2004 ◽  
Vol 24 (4) ◽  
pp. 415-435 ◽  
Author(s):  
Guillermo J. Berri ◽  
Germán I. Bertossa
Keyword(s):  
South America ◽  
Time Scales ◽  
Precipitation Variability ◽  
Southern Central ◽  
Central South

Evapotranspiration trends and variability in southeastern South America: the roles of land‐cover change and precipitation variability

2021 ◽  
Author(s):  
Romina C. Ruscica ◽  
Anna A. Sörensson ◽  
Leandro B. Diaz ◽  
Carolina Vera ◽  
Aline Castro ◽  
...  
Keyword(s):  
South America ◽  
Land Cover ◽  
Land Cover Change ◽  
Precipitation Variability

The heat wave of October 2020 in central South America

2021 ◽  
Author(s):  
Jose A. Marengo ◽  
Tercio Ambrizzi ◽  
Naurinete Barreto ◽  
Ana Paula Cunha ◽  
Andrea M. Ramos ◽  
...  
Keyword(s):  
South America ◽  
Heat Wave ◽  
Central South

scholarly journals Foraging behavior and diet of the vulnerable Cinereous Warbling-finch Poospiza cinerea (Aves, Emberizidae)

2014 ◽  
Vol 74 (4) ◽  
pp. 821-827 ◽  
Author(s):  
U Wischhoff ◽  
F Marques-Santos ◽  
M Rodrigues
Keyword(s):  
South America ◽  
Foraging Behavior ◽  
Rare Species ◽  
Feeding Habits ◽  
Reproductive Organs ◽  
Substrate Use ◽  
Food Items ◽  
Niche Specialization ◽  
Study Sites ◽  
Central South

The Cinereous Warbling-finch Poospiza cinerea is a globally vulnerable Emberizidae passerine, patchily distributed and rare in the open savannah of central South America. Attributes of rare species include niche specificity such as feeding habits. To verify possible niche specialization in this species we aimed to describe its foraging habits related to substrate use, foraging and substrate height, attack maneuvers, and consumed food items. We monitored two groups at two study sites and sampled foraging events with intervals of 15 minutes. The substrates used in greater frequency were foliage and reproductive organs. Foraging and substrate height varied widely with study area. The attack maneuver adopted in greater frequency was glean. Most food items attacked were small invertebrates. Big invertebrates included Lepidoptera, Hemiptera, Coleoptera, Hymenoptera and Orthoptera. Poospiza cinerea was also recorded foraging in mixed bird flocks with seven other species. The generalist foraging behavior of the species cannot be associate to its rarity.

Linking speleothem and soil magnetism in the Pau d'Alho cave (central South America)

2016 ◽  
Vol 121 (10) ◽  
pp. 7024-7039 ◽  
Author(s):  
Plinio Jaqueto ◽  
Ricardo I. F. Trindade ◽  
Gelvam A. Hartmann ◽  
Valdir F. Novello ◽  
Francisco W. Cruz ◽  
...  
Keyword(s):  
South America ◽  
Central South ◽  
Soil Magnetism

scholarly journals Responses of groundwater to precipitation variability and ENSO in the Vietnamese Mekong Delta

2021 ◽  
Author(s):  
Phong V. V. Le ◽  
Hai V. Pham ◽  
Luyen K. Bui ◽  
Anh N. Tran ◽  
Chien V. Pham ◽  
...  
Keyword(s):  
Water Resources ◽  
Climate Variability ◽  
Time Scales ◽  
Groundwater Level ◽  
Southern Oscillation ◽  
Mekong Delta ◽  
Precipitation Variability ◽  
Annual Precipitation ◽  
Aquifer Recharge ◽  
Deep Aquifers

Abstract Groundwater is a critical component of water resources and has become the primary water supply for agricultural and domestic uses in the Vietnamese Mekong Delta (VMD). Widespread groundwater level declines have occurred in the VMD over recent decades, reflecting that extraction rates exceed aquifer recharge in the region. However, the impacts of climate variability on groundwater system dynamics in the VMD remain poorly understood. Here, we explore recent changes in groundwater levels in shallow and deep aquifers from observed wells in the VMD and investigate their relations to the annual precipitation variability and El Niño–Southern Oscillation (ENSO). We show that groundwater level responds to changes in annual precipitation at time scales of approximately 1 year. Moreover, shallow (deep) groundwater in the VMD appears to correlate with the ENSO over intra-annual (inter-annual) time scales. Our findings reveal a critical linkage between groundwater level changes and climate variability, suggesting the need to develop an understanding of the impacts of climate variability across time scales on water resources in the VMD.

Hydrocarbon-Bearing Late Paleozoic Glaciated Basins of Southern and Central South America

1995 ◽  
Author(s):  
N. Eyles ◽  
A. B. França ◽  
G. Gonzalez Bonorino ◽  
C. H. Eyles ◽  
O. López Paulsen
Keyword(s):  
South America ◽  
Late Paleozoic ◽  
Central South
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