Date of Award

1-1-2015

Language

English

Document Type

Master's Thesis

Degree Name

Master of Science (MS)

College/School/Department

Department of Atmospheric and Environmental Sciences

Content Description

1 online resource (xii, 64 pages) : color illustrations, color maps.

Dissertation/Thesis Chair

Mathias Vuille

Committee Members

Paul E Roundy

Keywords

cold episodes, extreme rainfall events, Impacts of extreme hydrometeorological events over South America, large-scale atmospheric circulation, Peruvian Central Andes, telecconections, Rain and rainfall, Atmospheric circulation, Hydrometeorology, Climatic extremes

Subject Categories

Atmospheric Sciences | Environmental Sciences

Abstract

In this Master's dissertation, atmospheric circulation patterns associated with extreme hydrometeorological events in the Mantaro Basin, Peruvian Central Andes, and their teleconnections during the austral summer (December-January-February-March) are addressed. Extreme rainfall events in the Mantaro basin are related to variations of the large-scale circulation as indicated by the changing strength of the Bolivian High-Nordeste Low (BH-NL) system. Dry (wet) spells are associated with a weakening (strengthening) of the BH-NL system and reduced (enhanced) influx of moist air from the lowlands to the east due to strengthened westerly (easterly) wind anomalies at mid- and upper-tropospheric levels. At the same time extreme rainfall events of the opposite sign occur over northeastern Brazil (NEB) due to enhanced (inhibited) convective activity in conjunction with a strengthened (weakened) Nordeste Low.

Download

Share

COinS