Holocene climate variability in tropical South America : case history from a high-mountain wet zone in NW Colombia based on palynology and X-ray microfluorescence PDF Download
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Author: Paula Andrea Muñoz Uribe
Publisher:
ISBN: 9782940472253
Category :
Languages : en
Pages :
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Book Description
Author: Paula Andrea Muñoz Uribe
Publisher:
ISBN: 9782940472253
Category :
Languages : en
Pages :
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Book Description
Author: Francoise Vimeux
Publisher: Springer Science & Business Media
ISBN: 904812672X
Category : Science
Languages : en
Pages : 424
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Book Description
South America is a unique place where a number of past climate archives are ava- able from tropical to high latitude regions. It thus offers a unique opportunity to explore past climate variability along a latitudinal transect from the Equator to Polar regions and to study climate teleconnections. Most climate records from tropical and subtropical South America for the past 20,000 years have been interpreted as local responses to shift in the mean position and intensity of the InterTropical Conv- gence Zone due to tropical and extratropical forcings or to changes in the South American Summer Monsoon. Further South, the role of the Southern Hemisphere westerly winds on global climate has been highly investigated with both paleodata and coupled climate models. However the regional response over South America during the last 20,000 years is much more variable from place to place than pre- ously thought. The factors that govern the spatial patterns of variability on millennial scale resolution are still to be understood. The question of past natural rates and ranges of climate conditions over South America is therefore of special relevance in this context since today millions of people live under climates where any changes in monsoon rainfall can lead to catastrophic consequences.
Author: Henry F. Diaz
Publisher: Springer Science & Business Media
ISBN: 9401512523
Category : Science
Languages : en
Pages : 283
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Book Description
Glaciers in the Andes are particularly important natural archives of present and past climatic and environmental changes, in significant part because of the N-S trend of this topographic barrier and its influence on the atmospheric circulation of the southern hemisphere. Strong gradients in the seasonality and amount of precipitation exist between the equator and 30° S. Large differences in amount east and west of the Andean divide also occur, as well as a change from tropical summer precipitation (additionally modified by the seasonal shift of the circulation belts) to winter precipitation in the west wind belt (e. g. , Yuille, 1999; Garraud and Aceituno, 2001). The so-called 'dry axis' lies between the tropical and extra tropical precipitation regimes (Figure 1). The high mountain desert within this axis responds most sensitively to the smallest changes in effective moisture. An important hydro-meteorological feature on a seasonal to inter-annual time-scale is the occurrence of EN SO events, which strongly control the mass balance of glaciers in this area (e. g. , Wagnon et ai. , 2001; Francou et ai. , in press). The precipitation pattern is an important factor for the interpretation of climatic and environmental records extracted from ice cores, because much of this information is related to conditions at the actual time of precipitation, and this is especially so for stable isotope records. Several ice cores have recently been drilled to bedrock in this area. From Huascanin (Thompson et ai. , 1995), Sajama (Thompson et ai.
Author: Sarah E. Metcalfe
Publisher: John Wiley & Sons
ISBN: 1118336178
Category : Science
Languages : en
Pages : 826
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Book Description
The global climate changes that led to the expansion and contraction of high latitude ice sheets during the Quaternary period were associated with equally dramatic changes in tropical environments. These included shifts in vegetation zones, changes in the hydrology and ecology of lakes and rivers, and fluctuations in the size of mountain glaciers and sandy deserts. Until recently it was thought that such changes were triggered by fluctuations in the distribution of polar ice cover. Now there is increasing recognition that the tropics themselves have acted as drivers of global climate change over a range of timescales. The aim of Quaternary Environmental Change in the Tropics is to provide a synthesis of the changes that occurred in tropical terrestrial and marine systems during the Pleistocene and Holocene, complementing data-derived reconstructions with output from state-of-the-art climate models. It is targeted at final-year undergraduate students and research specialists, but will provide an introduction to tropical Quaternary research for a variety of other readers.
Author: Lesley-Ann Dupigny-Giroux
Publisher: Springer Science & Business Media
ISBN: 9048128285
Category : Science
Languages : en
Pages : 279
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Book Description
Climatologists with an eye on the past have any number of sources for their work, from personal diaries to weather station reports. Piecing together the trajectory of a weather event can thus be a painstaking process taking years and involving real detective work. Missing pieces of a climate puzzle can come from very far afield, often in unlikely places. In this book, a series of case studies examine specific regions across North America, using instrumental and documentary data from the 17th to the 19th centuries. Extreme weather events such as the Sitka hurricane of 1880 are recounted in detail, while the chapters also cover more widespread phenomena such as the collapse of the Low Country rice culture. The book also looks at the role of weather station histories in complementing the instrumental record, and sets out the methods that involve early instrumental and documentary climate data. Finally, the book’s focus on North America reflects the fact that the historical climate community there has only grown relatively recently. Up to now, most such studies have focused on Europe and Asia. The four sections begin with regional case studies, and move on to reconstruct extreme events and parameters. This is followed by the role of station history and, lastly, methodologies and other analyses. The editors’ aim has been to produce a volume that would be instrumental in molding the next generation of historical climatologists. They designed this book for use by general researchers as well as in upper-level undergraduate or graduate level courses.
Author: Thorsten Wagener
Publisher:
ISBN: 9781901502138
Category : Nature
Languages : en
Pages : 318
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Book Description
Author: Julián Villamayor
Publisher: Springer
ISBN: 3030203271
Category : Science
Languages : en
Pages : 227
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Book Description
In this book the Sea Surface Temperature (SST) patterns of decadal-to-multidecadal variability observed and simulated by 17 general circulation models (GCMs) are analyzed. Furthermore, their impact on precipitation in West Africa and South America and the atmospheric mechanisms involved are assessed. Through this analysis, the effect of external forcings on these impacts and the relative contribution of decadal-to-multidecadal variability patterns of SST to precipitation are presented in depth. Finally, a humid period in the West African region of the Sahel during the 19th century, previously little documented, is analyzed using an atmospheric GCM. The monsoons of West Africa and South America have shown changes in the timescales of a few decades. Previous work suggests a relationship with patterns of decadal-to-multidecadal variability of SST, such as global warming and the Atlantic and Pacific variability. However, the dynamics underlying this relationship and its simulation by current GCMs had not been addressed in a consistent manner. This is the main motivation of this book. The results of this book not only represent a great step forward in our understanding of the changes in the precipitation regimes of the studied regions, but they can also be of great help for the improvement of decadal prediction systems and the associated social consequences.
Author: Jakob Kronik
Publisher: World Bank Publications
ISBN: 9780821383810
Category : Political Science
Languages : en
Pages : 200
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Book Description
This book addresses the social implications of climate change and climatic variability on indigenous peoples and communities living in the highlands, lowlands, and coastal areas of Latin America and the Caribbean. Across the region, indigenous people already perceive and experience negative effects of climate change and variability. Many indigenous communities find it difficult to adapt in a culturally sustainable manner. In fact, indigenous peoples often blame themselves for the changes they observe in nature, despite their limited emission of green house gasses. Not only is the viability of their livelihoods threatened, resulting in food insecurity and poor health, but also their cultural integrity is being challenged, eroding the confidence in solutions provided by traditional institutions and authorities. The book is based on field research among indigenous communities in three major eco-geographical regions: the Amazon; the Andes and Sub-Andes; and the Caribbean and Mesoamerica. It finds major inter-regional differences in the impacts observed between areas prone to rapid- and slow-onset natural hazards. In Mesoamerican and the Caribbean, increasingly severe storms and hurricanes damage infrastructure and property, and even cause loss of land, reducing access to livelihood resources. In the Columbian Amazon, changes in precipitation and seasonality have direct immediate effects on livelihoods and health, as crops often fail and the reproduction of fish stock is threatened by changes in the river ebb and flow. In the Andean region, water scarcity for crops and livestock, erosion of ecosystems and changes in biodiversity threatens food security, both within indigenous villages and among populations who depend on indigenous agriculture, causing widespread migration to already crowded urban areas. The study aims to increase understanding on the complexity of how indigenous communities are impacted by climate change and the options for improving their resilience and adaptability to these phenomena. The goal is to improve indigenous peoples rights and opportunities in climate change adaptation, and guide efforts to design effective and sustainable adaptation initiatives.
Author: Rob Allan
Publisher: CSIRO Publishing
ISBN:
Category : Science
Languages : en
Pages : 424
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Book Description
Accompanied by a CD-ROM; El Nino and La Nina, Southern Oscillation and SOI, ENSO - ENSO structure, nature and physical characteristics - Data and methods - Oceanic, atmospheric and hydrological variable responses to ENSO - Patterns in historical records - Wider terrestrial and marine environmental impactst_____________
Author: Lesley-Ann Dupigny-Giroux
Publisher: Springer
ISBN: 9789048128297
Category : Science
Languages : en
Pages : 278
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Book Description
Climatologists with an eye on the past have any number of sources for their work, from personal diaries to weather station reports. Piecing together the trajectory of a weather event can thus be a painstaking process taking years and involving real detective work. Missing pieces of a climate puzzle can come from very far afield, often in unlikely places. In this book, a series of case studies examine specific regions across North America, using instrumental and documentary data from the 17th to the 19th centuries. Extreme weather events such as the Sitka hurricane of 1880 are recounted in detail, while the chapters also cover more widespread phenomena such as the collapse of the Low Country rice culture. The book also looks at the role of weather station histories in complementing the instrumental record, and sets out the methods that involve early instrumental and documentary climate data. Finally, the book’s focus on North America reflects the fact that the historical climate community there has only grown relatively recently. Up to now, most such studies have focused on Europe and Asia. The four sections begin with regional case studies, and move on to reconstruct extreme events and parameters. This is followed by the role of station history and, lastly, methodologies and other analyses. The editors’ aim has been to produce a volume that would be instrumental in molding the next generation of historical climatologists. They designed this book for use by general researchers as well as in upper-level undergraduate or graduate level courses.
