Papers by sandra banholzer
AGU Fall Meeting Abstracts, Dec 1, 2014
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International Conference on Sustainable Infrastructure 2019
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The UBC Department of Geography is pleased to host students, faculty and guests on April 26 for t... more The UBC Department of Geography is pleased to host students, faculty and guests on April 26 for the 2012 Graduate Student Symposium. Second-year master students will be presenting their latest research findings with opportunities for discussion and constructive feedback. Each presentation will take approximately 15 minutes with five minutes afterwards for questions.
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Reducing Disaster: Early Warning Systems For Climate Change, 2014
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ABSTRACT In recent decades, the frequency of forest fires has been increasing in western North Am... more ABSTRACT In recent decades, the frequency of forest fires has been increasing in western North America (NAW). Several studies have already established a connection between climate oscillations, such as ENSO, and forest fire occurrence. However, a recently discovered variant of El Niño, called El Niño Modoki or Central Pacific El Niño (CP-El Niño), has been observed more frequently in the last few decades. This may cause different extra tropical teleconnections than the canonical El Niño (Eastern Pacific El Niño or EP-El Niño). The objective of this research is to find out if the past CP-El Niño events are associated with a different fire pattern across the NAW than during past EP-El Niño events. To investigate the possibly different fire regime, historical climate and forest fire data of the NAW over the last three decades were analyzed. Past CP-El Niño events during 1980-2010 were identified with the Improved El Niño Modoki Index (IEMI) and the HadISST dataset. Nino3 index was used to identify canonical El Niño and La Niña events. Seasonal climate composites of temperature and precipitation were generated for the NAW with the NARR dataset, separately for the past EP-El Niño and CP-El Niño years. Forest fire data were compiled for the same time period for the NAW (from California up to Alaska). Forest fire data sources for western Canada are the Canadian National Fire Database and for the western United States the Monitoring Trends in Burn Severity (MTBS) as well as the National Interagency Fire Center. The seasonal climate composites reveal different climate patterns related to the two types of El Niño. Quantitative analysis of the fire data shows also a different pattern during CP years than during EP years. These differences may be related to the altered teleconnections of the two types of El Niño. The conclusions drawn from this study could be used for forest fire management regarding fire suppression and also for predicting fire severity.
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International Conference on Sustainable Infrastructure 2019, 2019
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International Conference on Sustainable Infrastructure 2019, 2019
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Der Klimawandel ist eine der größten Herausforderungen des 21. Jahrhunderts. Bisher sind die ärms... more Der Klimawandel ist eine der größten Herausforderungen des 21. Jahrhunderts. Bisher sind die ärmsten Länder im Süden der Erdkugel von der Klimaerwärmung am stärksten betroffen. Das Abschmelzen der Gletscher, heftige Stürme oder Überschwemmungen weisen jedoch auch auf der nördlichen Hemisphäre auf die Auswirkungen der Klimaveränderung hin.
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Reducing Disaster: Early Warning Systems For Climate Change, 2014
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Geophysical Research Letters, Mar 28, 2014
ABSTRACT [1] The El Niño/ Southern Oscillation (ENSO) is known to influence surface temperatures ... more ABSTRACT [1] The El Niño/ Southern Oscillation (ENSO) is known to influence surface temperatures worldwide. El Niño conditions are thought to lead to anomalously warm global average surface temperature, absent other forcings. Recent research has identified distinct possible types of El Niño events based on the location of peak sea surface temperature anomalies. Here we analyze the relationship between the type of El Niño event and the global average temperature anomaly, using three historical temperature datasets. Separating El Niño events into types reveals that the global average surface temperatures are anomalously warm during and after traditional Eastern Pacific El Niño events, but not Central Pacific or Mixed events. Historical analysis indicated that slowdowns in the rate of global surface warming since the late-1800 s may be related to decadal variability in the frequency of different types of El Niño events.
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Papers by sandra banholzer